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qemu-e2k/target/arm/tcg/translate-a64.c
Peter Maydell 6fffc83785 target/arm: Fix A64 scalar SQSHRN and SQRSHRN 
In commit 1b7bc9b5c8 we changed handle_vec_simd_sqshrn() so
that instead of starting with a 0 value and depositing in each new
element from the narrowing operation, it instead started with the raw
result of the narrowing operation of the first element.

This is fine in the vector case, because the deposit operations for
the second and subsequent elements will always overwrite any higher
bits that might have been in the first element's result value in
tcg_rd.  However in the scalar case we only go through this loop
once.  The effect is that for a signed narrowing operation, if the
result is negative then we will now return a value where the bits
above the first element are incorrectly 1 (because the narrowfn
returns a sign-extended result, not one that is truncated to the
element size).

Fix this by using an extract operation to get exactly the correct
bits of the output of the narrowfn for element 1, instead of a
plain move.

Cc: qemu-stable@nongnu.org
Fixes: 1b7bc9b5c8 ("target/arm: Avoid tcg_const_ptr in handle_vec_simd_sqshrn")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2089
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20240123153416.877308-1-peter.maydell@linaro.org
2024-01-26 12:19:11 +00:00

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/*
* AArch64 translation
*
* Copyright (c) 2013 Alexander Graf <agraf@suse.de>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "exec/exec-all.h"
#include "translate.h"
#include "translate-a64.h"
#include "qemu/log.h"
#include "disas/disas.h"
#include "arm_ldst.h"
#include "semihosting/semihost.h"
#include "cpregs.h"
static TCGv_i64 cpu_X[32];
static TCGv_i64 cpu_pc;
/* Load/store exclusive handling */
static TCGv_i64 cpu_exclusive_high;
static const char *regnames[] = {
"x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",
"x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15",
"x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23",
"x24", "x25", "x26", "x27", "x28", "x29", "lr", "sp"
};
enum a64_shift_type {
A64_SHIFT_TYPE_LSL = 0,
A64_SHIFT_TYPE_LSR = 1,
A64_SHIFT_TYPE_ASR = 2,
A64_SHIFT_TYPE_ROR = 3
};
/*
* Helpers for extracting complex instruction fields
*/
/*
* For load/store with an unsigned 12 bit immediate scaled by the element
* size. The input has the immediate field in bits [14:3] and the element
* size in [2:0].
*/
static int uimm_scaled(DisasContext *s, int x)
{
unsigned imm = x >> 3;
unsigned scale = extract32(x, 0, 3);
return imm << scale;
}
/* For load/store memory tags: scale offset by LOG2_TAG_GRANULE */
static int scale_by_log2_tag_granule(DisasContext *s, int x)
{
return x << LOG2_TAG_GRANULE;
}
/*
* Include the generated decoders.
*/
#include "decode-sme-fa64.c.inc"
#include "decode-a64.c.inc"
/* Table based decoder typedefs - used when the relevant bits for decode
* are too awkwardly scattered across the instruction (eg SIMD).
*/
typedef void AArch64DecodeFn(DisasContext *s, uint32_t insn);
typedef struct AArch64DecodeTable {
uint32_t pattern;
uint32_t mask;
AArch64DecodeFn *disas_fn;
} AArch64DecodeTable;
/* initialize TCG globals. */
void a64_translate_init(void)
{
int i;
cpu_pc = tcg_global_mem_new_i64(tcg_env,
offsetof(CPUARMState, pc),
"pc");
for (i = 0; i < 32; i++) {
cpu_X[i] = tcg_global_mem_new_i64(tcg_env,
offsetof(CPUARMState, xregs[i]),
regnames[i]);
}
cpu_exclusive_high = tcg_global_mem_new_i64(tcg_env,
offsetof(CPUARMState, exclusive_high), "exclusive_high");
}
/*
* Return the core mmu_idx to use for A64 load/store insns which
* have a "unprivileged load/store" variant. Those insns access
* EL0 if executed from an EL which has control over EL0 (usually
* EL1) but behave like normal loads and stores if executed from
* elsewhere (eg EL3).
*
* @unpriv : true for the unprivileged encoding; false for the
* normal encoding (in which case we will return the same
* thing as get_mem_index().
*/
static int get_a64_user_mem_index(DisasContext *s, bool unpriv)
{
/*
* If AccType_UNPRIV is not used, the insn uses AccType_NORMAL,
* which is the usual mmu_idx for this cpu state.
*/
ARMMMUIdx useridx = s->mmu_idx;
if (unpriv && s->unpriv) {
/*
* We have pre-computed the condition for AccType_UNPRIV.
* Therefore we should never get here with a mmu_idx for
* which we do not know the corresponding user mmu_idx.
*/
switch (useridx) {
case ARMMMUIdx_E10_1:
case ARMMMUIdx_E10_1_PAN:
useridx = ARMMMUIdx_E10_0;
break;
case ARMMMUIdx_E20_2:
case ARMMMUIdx_E20_2_PAN:
useridx = ARMMMUIdx_E20_0;
break;
default:
g_assert_not_reached();
}
}
return arm_to_core_mmu_idx(useridx);
}
static void set_btype_raw(int val)
{
tcg_gen_st_i32(tcg_constant_i32(val), tcg_env,
offsetof(CPUARMState, btype));
}
static void set_btype(DisasContext *s, int val)
{
/* BTYPE is a 2-bit field, and 0 should be done with reset_btype. */
tcg_debug_assert(val >= 1 && val <= 3);
set_btype_raw(val);
s->btype = -1;
}
static void reset_btype(DisasContext *s)
{
if (s->btype != 0) {
set_btype_raw(0);
s->btype = 0;
}
}
static void gen_pc_plus_diff(DisasContext *s, TCGv_i64 dest, target_long diff)
{
assert(s->pc_save != -1);
if (tb_cflags(s->base.tb) & CF_PCREL) {
tcg_gen_addi_i64(dest, cpu_pc, (s->pc_curr - s->pc_save) + diff);
} else {
tcg_gen_movi_i64(dest, s->pc_curr + diff);
}
}
void gen_a64_update_pc(DisasContext *s, target_long diff)
{
gen_pc_plus_diff(s, cpu_pc, diff);
s->pc_save = s->pc_curr + diff;
}
/*
* Handle Top Byte Ignore (TBI) bits.
*
* If address tagging is enabled via the TCR TBI bits:
* + for EL2 and EL3 there is only one TBI bit, and if it is set
* then the address is zero-extended, clearing bits [63:56]
* + for EL0 and EL1, TBI0 controls addresses with bit 55 == 0
* and TBI1 controls addresses with bit 55 == 1.
* If the appropriate TBI bit is set for the address then
* the address is sign-extended from bit 55 into bits [63:56]
*
* Here We have concatenated TBI{1,0} into tbi.
*/
static void gen_top_byte_ignore(DisasContext *s, TCGv_i64 dst,
TCGv_i64 src, int tbi)
{
if (tbi == 0) {
/* Load unmodified address */
tcg_gen_mov_i64(dst, src);
} else if (!regime_has_2_ranges(s->mmu_idx)) {
/* Force tag byte to all zero */
tcg_gen_extract_i64(dst, src, 0, 56);
} else {
/* Sign-extend from bit 55. */
tcg_gen_sextract_i64(dst, src, 0, 56);
switch (tbi) {
case 1:
/* tbi0 but !tbi1: only use the extension if positive */
tcg_gen_and_i64(dst, dst, src);
break;
case 2:
/* !tbi0 but tbi1: only use the extension if negative */
tcg_gen_or_i64(dst, dst, src);
break;
case 3:
/* tbi0 and tbi1: always use the extension */
break;
default:
g_assert_not_reached();
}
}
}
static void gen_a64_set_pc(DisasContext *s, TCGv_i64 src)
{
/*
* If address tagging is enabled for instructions via the TCR TBI bits,
* then loading an address into the PC will clear out any tag.
*/
gen_top_byte_ignore(s, cpu_pc, src, s->tbii);
s->pc_save = -1;
}
/*
* Handle MTE and/or TBI.
*
* For TBI, ideally, we would do nothing. Proper behaviour on fault is
* for the tag to be present in the FAR_ELx register. But for user-only
* mode we do not have a TLB with which to implement this, so we must
* remove the top byte now.
*
* Always return a fresh temporary that we can increment independently
* of the write-back address.
*/
TCGv_i64 clean_data_tbi(DisasContext *s, TCGv_i64 addr)
{
TCGv_i64 clean = tcg_temp_new_i64();
#ifdef CONFIG_USER_ONLY
gen_top_byte_ignore(s, clean, addr, s->tbid);
#else
tcg_gen_mov_i64(clean, addr);
#endif
return clean;
}
/* Insert a zero tag into src, with the result at dst. */
static void gen_address_with_allocation_tag0(TCGv_i64 dst, TCGv_i64 src)
{
tcg_gen_andi_i64(dst, src, ~MAKE_64BIT_MASK(56, 4));
}
static void gen_probe_access(DisasContext *s, TCGv_i64 ptr,
MMUAccessType acc, int log2_size)
{
gen_helper_probe_access(tcg_env, ptr,
tcg_constant_i32(acc),
tcg_constant_i32(get_mem_index(s)),
tcg_constant_i32(1 << log2_size));
}
/*
* For MTE, check a single logical or atomic access. This probes a single
* address, the exact one specified. The size and alignment of the access
* is not relevant to MTE, per se, but watchpoints do require the size,
* and we want to recognize those before making any other changes to state.
*/
static TCGv_i64 gen_mte_check1_mmuidx(DisasContext *s, TCGv_i64 addr,
bool is_write, bool tag_checked,
MemOp memop, bool is_unpriv,
int core_idx)
{
if (tag_checked && s->mte_active[is_unpriv]) {
TCGv_i64 ret;
int desc = 0;
desc = FIELD_DP32(desc, MTEDESC, MIDX, core_idx);
desc = FIELD_DP32(desc, MTEDESC, TBI, s->tbid);
desc = FIELD_DP32(desc, MTEDESC, TCMA, s->tcma);
desc = FIELD_DP32(desc, MTEDESC, WRITE, is_write);
desc = FIELD_DP32(desc, MTEDESC, ALIGN, get_alignment_bits(memop));
desc = FIELD_DP32(desc, MTEDESC, SIZEM1, memop_size(memop) - 1);
ret = tcg_temp_new_i64();
gen_helper_mte_check(ret, tcg_env, tcg_constant_i32(desc), addr);
return ret;
}
return clean_data_tbi(s, addr);
}
TCGv_i64 gen_mte_check1(DisasContext *s, TCGv_i64 addr, bool is_write,
bool tag_checked, MemOp memop)
{
return gen_mte_check1_mmuidx(s, addr, is_write, tag_checked, memop,
false, get_mem_index(s));
}
/*
* For MTE, check multiple logical sequential accesses.
*/
TCGv_i64 gen_mte_checkN(DisasContext *s, TCGv_i64 addr, bool is_write,
bool tag_checked, int total_size, MemOp single_mop)
{
if (tag_checked && s->mte_active[0]) {
TCGv_i64 ret;
int desc = 0;
desc = FIELD_DP32(desc, MTEDESC, MIDX, get_mem_index(s));
desc = FIELD_DP32(desc, MTEDESC, TBI, s->tbid);
desc = FIELD_DP32(desc, MTEDESC, TCMA, s->tcma);
desc = FIELD_DP32(desc, MTEDESC, WRITE, is_write);
desc = FIELD_DP32(desc, MTEDESC, ALIGN, get_alignment_bits(single_mop));
desc = FIELD_DP32(desc, MTEDESC, SIZEM1, total_size - 1);
ret = tcg_temp_new_i64();
gen_helper_mte_check(ret, tcg_env, tcg_constant_i32(desc), addr);
return ret;
}
return clean_data_tbi(s, addr);
}
/*
* Generate the special alignment check that applies to AccType_ATOMIC
* and AccType_ORDERED insns under FEAT_LSE2: the access need not be
* naturally aligned, but it must not cross a 16-byte boundary.
* See AArch64.CheckAlignment().
*/
static void check_lse2_align(DisasContext *s, int rn, int imm,
bool is_write, MemOp mop)
{
TCGv_i32 tmp;
TCGv_i64 addr;
TCGLabel *over_label;
MMUAccessType type;
int mmu_idx;
tmp = tcg_temp_new_i32();
tcg_gen_extrl_i64_i32(tmp, cpu_reg_sp(s, rn));
tcg_gen_addi_i32(tmp, tmp, imm & 15);
tcg_gen_andi_i32(tmp, tmp, 15);
tcg_gen_addi_i32(tmp, tmp, memop_size(mop));
over_label = gen_new_label();
tcg_gen_brcondi_i32(TCG_COND_LEU, tmp, 16, over_label);
addr = tcg_temp_new_i64();
tcg_gen_addi_i64(addr, cpu_reg_sp(s, rn), imm);
type = is_write ? MMU_DATA_STORE : MMU_DATA_LOAD,
mmu_idx = get_mem_index(s);
gen_helper_unaligned_access(tcg_env, addr, tcg_constant_i32(type),
tcg_constant_i32(mmu_idx));
gen_set_label(over_label);
}
/* Handle the alignment check for AccType_ATOMIC instructions. */
static MemOp check_atomic_align(DisasContext *s, int rn, MemOp mop)
{
MemOp size = mop & MO_SIZE;
if (size == MO_8) {
return mop;
}
/*
* If size == MO_128, this is a LDXP, and the operation is single-copy
* atomic for each doubleword, not the entire quadword; it still must
* be quadword aligned.
*/
if (size == MO_128) {
return finalize_memop_atom(s, MO_128 | MO_ALIGN,
MO_ATOM_IFALIGN_PAIR);
}
if (dc_isar_feature(aa64_lse2, s)) {
check_lse2_align(s, rn, 0, true, mop);
} else {
mop |= MO_ALIGN;
}
return finalize_memop(s, mop);
}
/* Handle the alignment check for AccType_ORDERED instructions. */
static MemOp check_ordered_align(DisasContext *s, int rn, int imm,
bool is_write, MemOp mop)
{
MemOp size = mop & MO_SIZE;
if (size == MO_8) {
return mop;
}
if (size == MO_128) {
return finalize_memop_atom(s, MO_128 | MO_ALIGN,
MO_ATOM_IFALIGN_PAIR);
}
if (!dc_isar_feature(aa64_lse2, s)) {
mop |= MO_ALIGN;
} else if (!s->naa) {
check_lse2_align(s, rn, imm, is_write, mop);
}
return finalize_memop(s, mop);
}
typedef struct DisasCompare64 {
TCGCond cond;
TCGv_i64 value;
} DisasCompare64;
static void a64_test_cc(DisasCompare64 *c64, int cc)
{
DisasCompare c32;
arm_test_cc(&c32, cc);
/*
* Sign-extend the 32-bit value so that the GE/LT comparisons work
* properly. The NE/EQ comparisons are also fine with this choice.
*/
c64->cond = c32.cond;
c64->value = tcg_temp_new_i64();
tcg_gen_ext_i32_i64(c64->value, c32.value);
}
static void gen_rebuild_hflags(DisasContext *s)
{
gen_helper_rebuild_hflags_a64(tcg_env, tcg_constant_i32(s->current_el));
}
static void gen_exception_internal(int excp)
{
assert(excp_is_internal(excp));
gen_helper_exception_internal(tcg_env, tcg_constant_i32(excp));
}
static void gen_exception_internal_insn(DisasContext *s, int excp)
{
gen_a64_update_pc(s, 0);
gen_exception_internal(excp);
s->base.is_jmp = DISAS_NORETURN;
}
static void gen_exception_bkpt_insn(DisasContext *s, uint32_t syndrome)
{
gen_a64_update_pc(s, 0);
gen_helper_exception_bkpt_insn(tcg_env, tcg_constant_i32(syndrome));
s->base.is_jmp = DISAS_NORETURN;
}
static void gen_step_complete_exception(DisasContext *s)
{
/* We just completed step of an insn. Move from Active-not-pending
* to Active-pending, and then also take the swstep exception.
* This corresponds to making the (IMPDEF) choice to prioritize
* swstep exceptions over asynchronous exceptions taken to an exception
* level where debug is disabled. This choice has the advantage that
* we do not need to maintain internal state corresponding to the
* ISV/EX syndrome bits between completion of the step and generation
* of the exception, and our syndrome information is always correct.
*/
gen_ss_advance(s);
gen_swstep_exception(s, 1, s->is_ldex);
s->base.is_jmp = DISAS_NORETURN;
}
static inline bool use_goto_tb(DisasContext *s, uint64_t dest)
{
if (s->ss_active) {
return false;
}
return translator_use_goto_tb(&s->base, dest);
}
static void gen_goto_tb(DisasContext *s, int n, int64_t diff)
{
if (use_goto_tb(s, s->pc_curr + diff)) {
/*
* For pcrel, the pc must always be up-to-date on entry to
* the linked TB, so that it can use simple additions for all
* further adjustments. For !pcrel, the linked TB is compiled
* to know its full virtual address, so we can delay the
* update to pc to the unlinked path. A long chain of links
* can thus avoid many updates to the PC.
*/
if (tb_cflags(s->base.tb) & CF_PCREL) {
gen_a64_update_pc(s, diff);
tcg_gen_goto_tb(n);
} else {
tcg_gen_goto_tb(n);
gen_a64_update_pc(s, diff);
}
tcg_gen_exit_tb(s->base.tb, n);
s->base.is_jmp = DISAS_NORETURN;
} else {
gen_a64_update_pc(s, diff);
if (s->ss_active) {
gen_step_complete_exception(s);
} else {
tcg_gen_lookup_and_goto_ptr();
s->base.is_jmp = DISAS_NORETURN;
}
}
}
/*
* Register access functions
*
* These functions are used for directly accessing a register in where
* changes to the final register value are likely to be made. If you
* need to use a register for temporary calculation (e.g. index type
* operations) use the read_* form.
*
* B1.2.1 Register mappings
*
* In instruction register encoding 31 can refer to ZR (zero register) or
* the SP (stack pointer) depending on context. In QEMU's case we map SP
* to cpu_X[31] and ZR accesses to a temporary which can be discarded.
* This is the point of the _sp forms.
*/
TCGv_i64 cpu_reg(DisasContext *s, int reg)
{
if (reg == 31) {
TCGv_i64 t = tcg_temp_new_i64();
tcg_gen_movi_i64(t, 0);
return t;
} else {
return cpu_X[reg];
}
}
/* register access for when 31 == SP */
TCGv_i64 cpu_reg_sp(DisasContext *s, int reg)
{
return cpu_X[reg];
}
/* read a cpu register in 32bit/64bit mode. Returns a TCGv_i64
* representing the register contents. This TCGv is an auto-freed
* temporary so it need not be explicitly freed, and may be modified.
*/
TCGv_i64 read_cpu_reg(DisasContext *s, int reg, int sf)
{
TCGv_i64 v = tcg_temp_new_i64();
if (reg != 31) {
if (sf) {
tcg_gen_mov_i64(v, cpu_X[reg]);
} else {
tcg_gen_ext32u_i64(v, cpu_X[reg]);
}
} else {
tcg_gen_movi_i64(v, 0);
}
return v;
}
TCGv_i64 read_cpu_reg_sp(DisasContext *s, int reg, int sf)
{
TCGv_i64 v = tcg_temp_new_i64();
if (sf) {
tcg_gen_mov_i64(v, cpu_X[reg]);
} else {
tcg_gen_ext32u_i64(v, cpu_X[reg]);
}
return v;
}
/* Return the offset into CPUARMState of a slice (from
* the least significant end) of FP register Qn (ie
* Dn, Sn, Hn or Bn).
* (Note that this is not the same mapping as for A32; see cpu.h)
*/
static inline int fp_reg_offset(DisasContext *s, int regno, MemOp size)
{
return vec_reg_offset(s, regno, 0, size);
}
/* Offset of the high half of the 128 bit vector Qn */
static inline int fp_reg_hi_offset(DisasContext *s, int regno)
{
return vec_reg_offset(s, regno, 1, MO_64);
}
/* Convenience accessors for reading and writing single and double
* FP registers. Writing clears the upper parts of the associated
* 128 bit vector register, as required by the architecture.
* Note that unlike the GP register accessors, the values returned
* by the read functions must be manually freed.
*/
static TCGv_i64 read_fp_dreg(DisasContext *s, int reg)
{
TCGv_i64 v = tcg_temp_new_i64();
tcg_gen_ld_i64(v, tcg_env, fp_reg_offset(s, reg, MO_64));
return v;
}
static TCGv_i32 read_fp_sreg(DisasContext *s, int reg)
{
TCGv_i32 v = tcg_temp_new_i32();
tcg_gen_ld_i32(v, tcg_env, fp_reg_offset(s, reg, MO_32));
return v;
}
static TCGv_i32 read_fp_hreg(DisasContext *s, int reg)
{
TCGv_i32 v = tcg_temp_new_i32();
tcg_gen_ld16u_i32(v, tcg_env, fp_reg_offset(s, reg, MO_16));
return v;
}
/* Clear the bits above an N-bit vector, for N = (is_q ? 128 : 64).
* If SVE is not enabled, then there are only 128 bits in the vector.
*/
static void clear_vec_high(DisasContext *s, bool is_q, int rd)
{
unsigned ofs = fp_reg_offset(s, rd, MO_64);
unsigned vsz = vec_full_reg_size(s);
/* Nop move, with side effect of clearing the tail. */
tcg_gen_gvec_mov(MO_64, ofs, ofs, is_q ? 16 : 8, vsz);
}
void write_fp_dreg(DisasContext *s, int reg, TCGv_i64 v)
{
unsigned ofs = fp_reg_offset(s, reg, MO_64);
tcg_gen_st_i64(v, tcg_env, ofs);
clear_vec_high(s, false, reg);
}
static void write_fp_sreg(DisasContext *s, int reg, TCGv_i32 v)
{
TCGv_i64 tmp = tcg_temp_new_i64();
tcg_gen_extu_i32_i64(tmp, v);
write_fp_dreg(s, reg, tmp);
}
/* Expand a 2-operand AdvSIMD vector operation using an expander function. */
static void gen_gvec_fn2(DisasContext *s, bool is_q, int rd, int rn,
GVecGen2Fn *gvec_fn, int vece)
{
gvec_fn(vece, vec_full_reg_offset(s, rd), vec_full_reg_offset(s, rn),
is_q ? 16 : 8, vec_full_reg_size(s));
}
/* Expand a 2-operand + immediate AdvSIMD vector operation using
* an expander function.
*/
static void gen_gvec_fn2i(DisasContext *s, bool is_q, int rd, int rn,
int64_t imm, GVecGen2iFn *gvec_fn, int vece)
{
gvec_fn(vece, vec_full_reg_offset(s, rd), vec_full_reg_offset(s, rn),
imm, is_q ? 16 : 8, vec_full_reg_size(s));
}
/* Expand a 3-operand AdvSIMD vector operation using an expander function. */
static void gen_gvec_fn3(DisasContext *s, bool is_q, int rd, int rn, int rm,
GVecGen3Fn *gvec_fn, int vece)
{
gvec_fn(vece, vec_full_reg_offset(s, rd), vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm), is_q ? 16 : 8, vec_full_reg_size(s));
}
/* Expand a 4-operand AdvSIMD vector operation using an expander function. */
static void gen_gvec_fn4(DisasContext *s, bool is_q, int rd, int rn, int rm,
int rx, GVecGen4Fn *gvec_fn, int vece)
{
gvec_fn(vece, vec_full_reg_offset(s, rd), vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm), vec_full_reg_offset(s, rx),
is_q ? 16 : 8, vec_full_reg_size(s));
}
/* Expand a 2-operand operation using an out-of-line helper. */
static void gen_gvec_op2_ool(DisasContext *s, bool is_q, int rd,
int rn, int data, gen_helper_gvec_2 *fn)
{
tcg_gen_gvec_2_ool(vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
is_q ? 16 : 8, vec_full_reg_size(s), data, fn);
}
/* Expand a 3-operand operation using an out-of-line helper. */
static void gen_gvec_op3_ool(DisasContext *s, bool is_q, int rd,
int rn, int rm, int data, gen_helper_gvec_3 *fn)
{
tcg_gen_gvec_3_ool(vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm),
is_q ? 16 : 8, vec_full_reg_size(s), data, fn);
}
/* Expand a 3-operand + fpstatus pointer + simd data value operation using
* an out-of-line helper.
*/
static void gen_gvec_op3_fpst(DisasContext *s, bool is_q, int rd, int rn,
int rm, bool is_fp16, int data,
gen_helper_gvec_3_ptr *fn)
{
TCGv_ptr fpst = fpstatus_ptr(is_fp16 ? FPST_FPCR_F16 : FPST_FPCR);
tcg_gen_gvec_3_ptr(vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm), fpst,
is_q ? 16 : 8, vec_full_reg_size(s), data, fn);
}
/* Expand a 3-operand + qc + operation using an out-of-line helper. */
static void gen_gvec_op3_qc(DisasContext *s, bool is_q, int rd, int rn,
int rm, gen_helper_gvec_3_ptr *fn)
{
TCGv_ptr qc_ptr = tcg_temp_new_ptr();
tcg_gen_addi_ptr(qc_ptr, tcg_env, offsetof(CPUARMState, vfp.qc));
tcg_gen_gvec_3_ptr(vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm), qc_ptr,
is_q ? 16 : 8, vec_full_reg_size(s), 0, fn);
}
/* Expand a 4-operand operation using an out-of-line helper. */
static void gen_gvec_op4_ool(DisasContext *s, bool is_q, int rd, int rn,
int rm, int ra, int data, gen_helper_gvec_4 *fn)
{
tcg_gen_gvec_4_ool(vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm),
vec_full_reg_offset(s, ra),
is_q ? 16 : 8, vec_full_reg_size(s), data, fn);
}
/*
* Expand a 4-operand + fpstatus pointer + simd data value operation using
* an out-of-line helper.
*/
static void gen_gvec_op4_fpst(DisasContext *s, bool is_q, int rd, int rn,
int rm, int ra, bool is_fp16, int data,
gen_helper_gvec_4_ptr *fn)
{
TCGv_ptr fpst = fpstatus_ptr(is_fp16 ? FPST_FPCR_F16 : FPST_FPCR);
tcg_gen_gvec_4_ptr(vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm),
vec_full_reg_offset(s, ra), fpst,
is_q ? 16 : 8, vec_full_reg_size(s), data, fn);
}
/* Set ZF and NF based on a 64 bit result. This is alas fiddlier
* than the 32 bit equivalent.
*/
static inline void gen_set_NZ64(TCGv_i64 result)
{
tcg_gen_extr_i64_i32(cpu_ZF, cpu_NF, result);
tcg_gen_or_i32(cpu_ZF, cpu_ZF, cpu_NF);
}
/* Set NZCV as for a logical operation: NZ as per result, CV cleared. */
static inline void gen_logic_CC(int sf, TCGv_i64 result)
{
if (sf) {
gen_set_NZ64(result);
} else {
tcg_gen_extrl_i64_i32(cpu_ZF, result);
tcg_gen_mov_i32(cpu_NF, cpu_ZF);
}
tcg_gen_movi_i32(cpu_CF, 0);
tcg_gen_movi_i32(cpu_VF, 0);
}
/* dest = T0 + T1; compute C, N, V and Z flags */
static void gen_add64_CC(TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1)
{
TCGv_i64 result, flag, tmp;
result = tcg_temp_new_i64();
flag = tcg_temp_new_i64();
tmp = tcg_temp_new_i64();
tcg_gen_movi_i64(tmp, 0);
tcg_gen_add2_i64(result, flag, t0, tmp, t1, tmp);
tcg_gen_extrl_i64_i32(cpu_CF, flag);
gen_set_NZ64(result);
tcg_gen_xor_i64(flag, result, t0);
tcg_gen_xor_i64(tmp, t0, t1);
tcg_gen_andc_i64(flag, flag, tmp);
tcg_gen_extrh_i64_i32(cpu_VF, flag);
tcg_gen_mov_i64(dest, result);
}
static void gen_add32_CC(TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1)
{
TCGv_i32 t0_32 = tcg_temp_new_i32();
TCGv_i32 t1_32 = tcg_temp_new_i32();
TCGv_i32 tmp = tcg_temp_new_i32();
tcg_gen_movi_i32(tmp, 0);
tcg_gen_extrl_i64_i32(t0_32, t0);
tcg_gen_extrl_i64_i32(t1_32, t1);
tcg_gen_add2_i32(cpu_NF, cpu_CF, t0_32, tmp, t1_32, tmp);
tcg_gen_mov_i32(cpu_ZF, cpu_NF);
tcg_gen_xor_i32(cpu_VF, cpu_NF, t0_32);
tcg_gen_xor_i32(tmp, t0_32, t1_32);
tcg_gen_andc_i32(cpu_VF, cpu_VF, tmp);
tcg_gen_extu_i32_i64(dest, cpu_NF);
}
static void gen_add_CC(int sf, TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1)
{
if (sf) {
gen_add64_CC(dest, t0, t1);
} else {
gen_add32_CC(dest, t0, t1);
}
}
/* dest = T0 - T1; compute C, N, V and Z flags */
static void gen_sub64_CC(TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1)
{
/* 64 bit arithmetic */
TCGv_i64 result, flag, tmp;
result = tcg_temp_new_i64();
flag = tcg_temp_new_i64();
tcg_gen_sub_i64(result, t0, t1);
gen_set_NZ64(result);
tcg_gen_setcond_i64(TCG_COND_GEU, flag, t0, t1);
tcg_gen_extrl_i64_i32(cpu_CF, flag);
tcg_gen_xor_i64(flag, result, t0);
tmp = tcg_temp_new_i64();
tcg_gen_xor_i64(tmp, t0, t1);
tcg_gen_and_i64(flag, flag, tmp);
tcg_gen_extrh_i64_i32(cpu_VF, flag);
tcg_gen_mov_i64(dest, result);
}
static void gen_sub32_CC(TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1)
{
/* 32 bit arithmetic */
TCGv_i32 t0_32 = tcg_temp_new_i32();
TCGv_i32 t1_32 = tcg_temp_new_i32();
TCGv_i32 tmp;
tcg_gen_extrl_i64_i32(t0_32, t0);
tcg_gen_extrl_i64_i32(t1_32, t1);
tcg_gen_sub_i32(cpu_NF, t0_32, t1_32);
tcg_gen_mov_i32(cpu_ZF, cpu_NF);
tcg_gen_setcond_i32(TCG_COND_GEU, cpu_CF, t0_32, t1_32);
tcg_gen_xor_i32(cpu_VF, cpu_NF, t0_32);
tmp = tcg_temp_new_i32();
tcg_gen_xor_i32(tmp, t0_32, t1_32);
tcg_gen_and_i32(cpu_VF, cpu_VF, tmp);
tcg_gen_extu_i32_i64(dest, cpu_NF);
}
static void gen_sub_CC(int sf, TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1)
{
if (sf) {
gen_sub64_CC(dest, t0, t1);
} else {
gen_sub32_CC(dest, t0, t1);
}
}
/* dest = T0 + T1 + CF; do not compute flags. */
static void gen_adc(int sf, TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1)
{
TCGv_i64 flag = tcg_temp_new_i64();
tcg_gen_extu_i32_i64(flag, cpu_CF);
tcg_gen_add_i64(dest, t0, t1);
tcg_gen_add_i64(dest, dest, flag);
if (!sf) {
tcg_gen_ext32u_i64(dest, dest);
}
}
/* dest = T0 + T1 + CF; compute C, N, V and Z flags. */
static void gen_adc_CC(int sf, TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1)
{
if (sf) {
TCGv_i64 result = tcg_temp_new_i64();
TCGv_i64 cf_64 = tcg_temp_new_i64();
TCGv_i64 vf_64 = tcg_temp_new_i64();
TCGv_i64 tmp = tcg_temp_new_i64();
TCGv_i64 zero = tcg_constant_i64(0);
tcg_gen_extu_i32_i64(cf_64, cpu_CF);
tcg_gen_add2_i64(result, cf_64, t0, zero, cf_64, zero);
tcg_gen_add2_i64(result, cf_64, result, cf_64, t1, zero);
tcg_gen_extrl_i64_i32(cpu_CF, cf_64);
gen_set_NZ64(result);
tcg_gen_xor_i64(vf_64, result, t0);
tcg_gen_xor_i64(tmp, t0, t1);
tcg_gen_andc_i64(vf_64, vf_64, tmp);
tcg_gen_extrh_i64_i32(cpu_VF, vf_64);
tcg_gen_mov_i64(dest, result);
} else {
TCGv_i32 t0_32 = tcg_temp_new_i32();
TCGv_i32 t1_32 = tcg_temp_new_i32();
TCGv_i32 tmp = tcg_temp_new_i32();
TCGv_i32 zero = tcg_constant_i32(0);
tcg_gen_extrl_i64_i32(t0_32, t0);
tcg_gen_extrl_i64_i32(t1_32, t1);
tcg_gen_add2_i32(cpu_NF, cpu_CF, t0_32, zero, cpu_CF, zero);
tcg_gen_add2_i32(cpu_NF, cpu_CF, cpu_NF, cpu_CF, t1_32, zero);
tcg_gen_mov_i32(cpu_ZF, cpu_NF);
tcg_gen_xor_i32(cpu_VF, cpu_NF, t0_32);
tcg_gen_xor_i32(tmp, t0_32, t1_32);
tcg_gen_andc_i32(cpu_VF, cpu_VF, tmp);
tcg_gen_extu_i32_i64(dest, cpu_NF);
}
}
/*
* Load/Store generators
*/
/*
* Store from GPR register to memory.
*/
static void do_gpr_st_memidx(DisasContext *s, TCGv_i64 source,
TCGv_i64 tcg_addr, MemOp memop, int memidx,
bool iss_valid,
unsigned int iss_srt,
bool iss_sf, bool iss_ar)
{
tcg_gen_qemu_st_i64(source, tcg_addr, memidx, memop);
if (iss_valid) {
uint32_t syn;
syn = syn_data_abort_with_iss(0,
(memop & MO_SIZE),
false,
iss_srt,
iss_sf,
iss_ar,
0, 0, 0, 0, 0, false);
disas_set_insn_syndrome(s, syn);
}
}
static void do_gpr_st(DisasContext *s, TCGv_i64 source,
TCGv_i64 tcg_addr, MemOp memop,
bool iss_valid,
unsigned int iss_srt,
bool iss_sf, bool iss_ar)
{
do_gpr_st_memidx(s, source, tcg_addr, memop, get_mem_index(s),
iss_valid, iss_srt, iss_sf, iss_ar);
}
/*
* Load from memory to GPR register
*/
static void do_gpr_ld_memidx(DisasContext *s, TCGv_i64 dest, TCGv_i64 tcg_addr,
MemOp memop, bool extend, int memidx,
bool iss_valid, unsigned int iss_srt,
bool iss_sf, bool iss_ar)
{
tcg_gen_qemu_ld_i64(dest, tcg_addr, memidx, memop);
if (extend && (memop & MO_SIGN)) {
g_assert((memop & MO_SIZE) <= MO_32);
tcg_gen_ext32u_i64(dest, dest);
}
if (iss_valid) {
uint32_t syn;
syn = syn_data_abort_with_iss(0,
(memop & MO_SIZE),
(memop & MO_SIGN) != 0,
iss_srt,
iss_sf,
iss_ar,
0, 0, 0, 0, 0, false);
disas_set_insn_syndrome(s, syn);
}
}
static void do_gpr_ld(DisasContext *s, TCGv_i64 dest, TCGv_i64 tcg_addr,
MemOp memop, bool extend,
bool iss_valid, unsigned int iss_srt,
bool iss_sf, bool iss_ar)
{
do_gpr_ld_memidx(s, dest, tcg_addr, memop, extend, get_mem_index(s),
iss_valid, iss_srt, iss_sf, iss_ar);
}
/*
* Store from FP register to memory
*/
static void do_fp_st(DisasContext *s, int srcidx, TCGv_i64 tcg_addr, MemOp mop)
{
/* This writes the bottom N bits of a 128 bit wide vector to memory */
TCGv_i64 tmplo = tcg_temp_new_i64();
tcg_gen_ld_i64(tmplo, tcg_env, fp_reg_offset(s, srcidx, MO_64));
if ((mop & MO_SIZE) < MO_128) {
tcg_gen_qemu_st_i64(tmplo, tcg_addr, get_mem_index(s), mop);
} else {
TCGv_i64 tmphi = tcg_temp_new_i64();
TCGv_i128 t16 = tcg_temp_new_i128();
tcg_gen_ld_i64(tmphi, tcg_env, fp_reg_hi_offset(s, srcidx));
tcg_gen_concat_i64_i128(t16, tmplo, tmphi);
tcg_gen_qemu_st_i128(t16, tcg_addr, get_mem_index(s), mop);
}
}
/*
* Load from memory to FP register
*/
static void do_fp_ld(DisasContext *s, int destidx, TCGv_i64 tcg_addr, MemOp mop)
{
/* This always zero-extends and writes to a full 128 bit wide vector */
TCGv_i64 tmplo = tcg_temp_new_i64();
TCGv_i64 tmphi = NULL;
if ((mop & MO_SIZE) < MO_128) {
tcg_gen_qemu_ld_i64(tmplo, tcg_addr, get_mem_index(s), mop);
} else {
TCGv_i128 t16 = tcg_temp_new_i128();
tcg_gen_qemu_ld_i128(t16, tcg_addr, get_mem_index(s), mop);
tmphi = tcg_temp_new_i64();
tcg_gen_extr_i128_i64(tmplo, tmphi, t16);
}
tcg_gen_st_i64(tmplo, tcg_env, fp_reg_offset(s, destidx, MO_64));
if (tmphi) {
tcg_gen_st_i64(tmphi, tcg_env, fp_reg_hi_offset(s, destidx));
}
clear_vec_high(s, tmphi != NULL, destidx);
}
/*
* Vector load/store helpers.
*
* The principal difference between this and a FP load is that we don't
* zero extend as we are filling a partial chunk of the vector register.
* These functions don't support 128 bit loads/stores, which would be
* normal load/store operations.
*
* The _i32 versions are useful when operating on 32 bit quantities
* (eg for floating point single or using Neon helper functions).
*/
/* Get value of an element within a vector register */
static void read_vec_element(DisasContext *s, TCGv_i64 tcg_dest, int srcidx,
int element, MemOp memop)
{
int vect_off = vec_reg_offset(s, srcidx, element, memop & MO_SIZE);
switch ((unsigned)memop) {
case MO_8:
tcg_gen_ld8u_i64(tcg_dest, tcg_env, vect_off);
break;
case MO_16:
tcg_gen_ld16u_i64(tcg_dest, tcg_env, vect_off);
break;
case MO_32:
tcg_gen_ld32u_i64(tcg_dest, tcg_env, vect_off);
break;
case MO_8|MO_SIGN:
tcg_gen_ld8s_i64(tcg_dest, tcg_env, vect_off);
break;
case MO_16|MO_SIGN:
tcg_gen_ld16s_i64(tcg_dest, tcg_env, vect_off);
break;
case MO_32|MO_SIGN:
tcg_gen_ld32s_i64(tcg_dest, tcg_env, vect_off);
break;
case MO_64:
case MO_64|MO_SIGN:
tcg_gen_ld_i64(tcg_dest, tcg_env, vect_off);
break;
default:
g_assert_not_reached();
}
}
static void read_vec_element_i32(DisasContext *s, TCGv_i32 tcg_dest, int srcidx,
int element, MemOp memop)
{
int vect_off = vec_reg_offset(s, srcidx, element, memop & MO_SIZE);
switch (memop) {
case MO_8:
tcg_gen_ld8u_i32(tcg_dest, tcg_env, vect_off);
break;
case MO_16:
tcg_gen_ld16u_i32(tcg_dest, tcg_env, vect_off);
break;
case MO_8|MO_SIGN:
tcg_gen_ld8s_i32(tcg_dest, tcg_env, vect_off);
break;
case MO_16|MO_SIGN:
tcg_gen_ld16s_i32(tcg_dest, tcg_env, vect_off);
break;
case MO_32:
case MO_32|MO_SIGN:
tcg_gen_ld_i32(tcg_dest, tcg_env, vect_off);
break;
default:
g_assert_not_reached();
}
}
/* Set value of an element within a vector register */
static void write_vec_element(DisasContext *s, TCGv_i64 tcg_src, int destidx,
int element, MemOp memop)
{
int vect_off = vec_reg_offset(s, destidx, element, memop & MO_SIZE);
switch (memop) {
case MO_8:
tcg_gen_st8_i64(tcg_src, tcg_env, vect_off);
break;
case MO_16:
tcg_gen_st16_i64(tcg_src, tcg_env, vect_off);
break;
case MO_32:
tcg_gen_st32_i64(tcg_src, tcg_env, vect_off);
break;
case MO_64:
tcg_gen_st_i64(tcg_src, tcg_env, vect_off);
break;
default:
g_assert_not_reached();
}
}
static void write_vec_element_i32(DisasContext *s, TCGv_i32 tcg_src,
int destidx, int element, MemOp memop)
{
int vect_off = vec_reg_offset(s, destidx, element, memop & MO_SIZE);
switch (memop) {
case MO_8:
tcg_gen_st8_i32(tcg_src, tcg_env, vect_off);
break;
case MO_16:
tcg_gen_st16_i32(tcg_src, tcg_env, vect_off);
break;
case MO_32:
tcg_gen_st_i32(tcg_src, tcg_env, vect_off);
break;
default:
g_assert_not_reached();
}
}
/* Store from vector register to memory */
static void do_vec_st(DisasContext *s, int srcidx, int element,
TCGv_i64 tcg_addr, MemOp mop)
{
TCGv_i64 tcg_tmp = tcg_temp_new_i64();
read_vec_element(s, tcg_tmp, srcidx, element, mop & MO_SIZE);
tcg_gen_qemu_st_i64(tcg_tmp, tcg_addr, get_mem_index(s), mop);
}
/* Load from memory to vector register */
static void do_vec_ld(DisasContext *s, int destidx, int element,
TCGv_i64 tcg_addr, MemOp mop)
{
TCGv_i64 tcg_tmp = tcg_temp_new_i64();
tcg_gen_qemu_ld_i64(tcg_tmp, tcg_addr, get_mem_index(s), mop);
write_vec_element(s, tcg_tmp, destidx, element, mop & MO_SIZE);
}
/* Check that FP/Neon access is enabled. If it is, return
* true. If not, emit code to generate an appropriate exception,
* and return false; the caller should not emit any code for
* the instruction. Note that this check must happen after all
* unallocated-encoding checks (otherwise the syndrome information
* for the resulting exception will be incorrect).
*/
static bool fp_access_check_only(DisasContext *s)
{
if (s->fp_excp_el) {
assert(!s->fp_access_checked);
s->fp_access_checked = true;
gen_exception_insn_el(s, 0, EXCP_UDEF,
syn_fp_access_trap(1, 0xe, false, 0),
s->fp_excp_el);
return false;
}
s->fp_access_checked = true;
return true;
}
static bool fp_access_check(DisasContext *s)
{
if (!fp_access_check_only(s)) {
return false;
}
if (s->sme_trap_nonstreaming && s->is_nonstreaming) {
gen_exception_insn(s, 0, EXCP_UDEF,
syn_smetrap(SME_ET_Streaming, false));
return false;
}
return true;
}
/*
* Check that SVE access is enabled. If it is, return true.
* If not, emit code to generate an appropriate exception and return false.
* This function corresponds to CheckSVEEnabled().
*/
bool sve_access_check(DisasContext *s)
{
if (s->pstate_sm || !dc_isar_feature(aa64_sve, s)) {
assert(dc_isar_feature(aa64_sme, s));
if (!sme_sm_enabled_check(s)) {
goto fail_exit;
}
} else if (s->sve_excp_el) {
gen_exception_insn_el(s, 0, EXCP_UDEF,
syn_sve_access_trap(), s->sve_excp_el);
goto fail_exit;
}
s->sve_access_checked = true;
return fp_access_check(s);
fail_exit:
/* Assert that we only raise one exception per instruction. */
assert(!s->sve_access_checked);
s->sve_access_checked = true;
return false;
}
/*
* Check that SME access is enabled, raise an exception if not.
* Note that this function corresponds to CheckSMEAccess and is
* only used directly for cpregs.
*/
static bool sme_access_check(DisasContext *s)
{
if (s->sme_excp_el) {
gen_exception_insn_el(s, 0, EXCP_UDEF,
syn_smetrap(SME_ET_AccessTrap, false),
s->sme_excp_el);
return false;
}
return true;
}
/* This function corresponds to CheckSMEEnabled. */
bool sme_enabled_check(DisasContext *s)
{
/*
* Note that unlike sve_excp_el, we have not constrained sme_excp_el
* to be zero when fp_excp_el has priority. This is because we need
* sme_excp_el by itself for cpregs access checks.
*/
if (!s->fp_excp_el || s->sme_excp_el < s->fp_excp_el) {
s->fp_access_checked = true;
return sme_access_check(s);
}
return fp_access_check_only(s);
}
/* Common subroutine for CheckSMEAnd*Enabled. */
bool sme_enabled_check_with_svcr(DisasContext *s, unsigned req)
{
if (!sme_enabled_check(s)) {
return false;
}
if (FIELD_EX64(req, SVCR, SM) && !s->pstate_sm) {
gen_exception_insn(s, 0, EXCP_UDEF,
syn_smetrap(SME_ET_NotStreaming, false));
return false;
}
if (FIELD_EX64(req, SVCR, ZA) && !s->pstate_za) {
gen_exception_insn(s, 0, EXCP_UDEF,
syn_smetrap(SME_ET_InactiveZA, false));
return false;
}
return true;
}
/*
* This utility function is for doing register extension with an
* optional shift. You will likely want to pass a temporary for the
* destination register. See DecodeRegExtend() in the ARM ARM.
*/
static void ext_and_shift_reg(TCGv_i64 tcg_out, TCGv_i64 tcg_in,
int option, unsigned int shift)
{
int extsize = extract32(option, 0, 2);
bool is_signed = extract32(option, 2, 1);
tcg_gen_ext_i64(tcg_out, tcg_in, extsize | (is_signed ? MO_SIGN : 0));
tcg_gen_shli_i64(tcg_out, tcg_out, shift);
}
static inline void gen_check_sp_alignment(DisasContext *s)
{
/* The AArch64 architecture mandates that (if enabled via PSTATE
* or SCTLR bits) there is a check that SP is 16-aligned on every
* SP-relative load or store (with an exception generated if it is not).
* In line with general QEMU practice regarding misaligned accesses,
* we omit these checks for the sake of guest program performance.
* This function is provided as a hook so we can more easily add these
* checks in future (possibly as a "favour catching guest program bugs
* over speed" user selectable option).
*/
}
/*
* This provides a simple table based table lookup decoder. It is
* intended to be used when the relevant bits for decode are too
* awkwardly placed and switch/if based logic would be confusing and
* deeply nested. Since it's a linear search through the table, tables
* should be kept small.
*
* It returns the first handler where insn & mask == pattern, or
* NULL if there is no match.
* The table is terminated by an empty mask (i.e. 0)
*/
static inline AArch64DecodeFn *lookup_disas_fn(const AArch64DecodeTable *table,
uint32_t insn)
{
const AArch64DecodeTable *tptr = table;
while (tptr->mask) {
if ((insn & tptr->mask) == tptr->pattern) {
return tptr->disas_fn;
}
tptr++;
}
return NULL;
}
/*
* The instruction disassembly implemented here matches
* the instruction encoding classifications in chapter C4
* of the ARM Architecture Reference Manual (DDI0487B_a);
* classification names and decode diagrams here should generally
* match up with those in the manual.
*/
static bool trans_B(DisasContext *s, arg_i *a)
{
reset_btype(s);
gen_goto_tb(s, 0, a->imm);
return true;
}
static bool trans_BL(DisasContext *s, arg_i *a)
{
gen_pc_plus_diff(s, cpu_reg(s, 30), curr_insn_len(s));
reset_btype(s);
gen_goto_tb(s, 0, a->imm);
return true;
}
static bool trans_CBZ(DisasContext *s, arg_cbz *a)
{
DisasLabel match;
TCGv_i64 tcg_cmp;
tcg_cmp = read_cpu_reg(s, a->rt, a->sf);
reset_btype(s);
match = gen_disas_label(s);
tcg_gen_brcondi_i64(a->nz ? TCG_COND_NE : TCG_COND_EQ,
tcg_cmp, 0, match.label);
gen_goto_tb(s, 0, 4);
set_disas_label(s, match);
gen_goto_tb(s, 1, a->imm);
return true;
}
static bool trans_TBZ(DisasContext *s, arg_tbz *a)
{
DisasLabel match;
TCGv_i64 tcg_cmp;
tcg_cmp = tcg_temp_new_i64();
tcg_gen_andi_i64(tcg_cmp, cpu_reg(s, a->rt), 1ULL << a->bitpos);
reset_btype(s);
match = gen_disas_label(s);
tcg_gen_brcondi_i64(a->nz ? TCG_COND_NE : TCG_COND_EQ,
tcg_cmp, 0, match.label);
gen_goto_tb(s, 0, 4);
set_disas_label(s, match);
gen_goto_tb(s, 1, a->imm);
return true;
}
static bool trans_B_cond(DisasContext *s, arg_B_cond *a)
{
/* BC.cond is only present with FEAT_HBC */
if (a->c && !dc_isar_feature(aa64_hbc, s)) {
return false;
}
reset_btype(s);
if (a->cond < 0x0e) {
/* genuinely conditional branches */
DisasLabel match = gen_disas_label(s);
arm_gen_test_cc(a->cond, match.label);
gen_goto_tb(s, 0, 4);
set_disas_label(s, match);
gen_goto_tb(s, 1, a->imm);
} else {
/* 0xe and 0xf are both "always" conditions */
gen_goto_tb(s, 0, a->imm);
}
return true;
}
static void set_btype_for_br(DisasContext *s, int rn)
{
if (dc_isar_feature(aa64_bti, s)) {
/* BR to {x16,x17} or !guard -> 1, else 3. */
set_btype(s, rn == 16 || rn == 17 || !s->guarded_page ? 1 : 3);
}
}
static void set_btype_for_blr(DisasContext *s)
{
if (dc_isar_feature(aa64_bti, s)) {
/* BLR sets BTYPE to 2, regardless of source guarded page. */
set_btype(s, 2);
}
}
static bool trans_BR(DisasContext *s, arg_r *a)
{
gen_a64_set_pc(s, cpu_reg(s, a->rn));
set_btype_for_br(s, a->rn);
s->base.is_jmp = DISAS_JUMP;
return true;
}
static bool trans_BLR(DisasContext *s, arg_r *a)
{
TCGv_i64 dst = cpu_reg(s, a->rn);
TCGv_i64 lr = cpu_reg(s, 30);
if (dst == lr) {
TCGv_i64 tmp = tcg_temp_new_i64();
tcg_gen_mov_i64(tmp, dst);
dst = tmp;
}
gen_pc_plus_diff(s, lr, curr_insn_len(s));
gen_a64_set_pc(s, dst);
set_btype_for_blr(s);
s->base.is_jmp = DISAS_JUMP;
return true;
}
static bool trans_RET(DisasContext *s, arg_r *a)
{
gen_a64_set_pc(s, cpu_reg(s, a->rn));
s->base.is_jmp = DISAS_JUMP;
return true;
}
static TCGv_i64 auth_branch_target(DisasContext *s, TCGv_i64 dst,
TCGv_i64 modifier, bool use_key_a)
{
TCGv_i64 truedst;
/*
* Return the branch target for a BRAA/RETA/etc, which is either
* just the destination dst, or that value with the pauth check
* done and the code removed from the high bits.
*/
if (!s->pauth_active) {
return dst;
}
truedst = tcg_temp_new_i64();
if (use_key_a) {
gen_helper_autia_combined(truedst, tcg_env, dst, modifier);
} else {
gen_helper_autib_combined(truedst, tcg_env, dst, modifier);
}
return truedst;
}
static bool trans_BRAZ(DisasContext *s, arg_braz *a)
{
TCGv_i64 dst;
if (!dc_isar_feature(aa64_pauth, s)) {
return false;
}
dst = auth_branch_target(s, cpu_reg(s, a->rn), tcg_constant_i64(0), !a->m);
gen_a64_set_pc(s, dst);
set_btype_for_br(s, a->rn);
s->base.is_jmp = DISAS_JUMP;
return true;
}
static bool trans_BLRAZ(DisasContext *s, arg_braz *a)
{
TCGv_i64 dst, lr;
if (!dc_isar_feature(aa64_pauth, s)) {
return false;
}
dst = auth_branch_target(s, cpu_reg(s, a->rn), tcg_constant_i64(0), !a->m);
lr = cpu_reg(s, 30);
if (dst == lr) {
TCGv_i64 tmp = tcg_temp_new_i64();
tcg_gen_mov_i64(tmp, dst);
dst = tmp;
}
gen_pc_plus_diff(s, lr, curr_insn_len(s));
gen_a64_set_pc(s, dst);
set_btype_for_blr(s);
s->base.is_jmp = DISAS_JUMP;
return true;
}
static bool trans_RETA(DisasContext *s, arg_reta *a)
{
TCGv_i64 dst;
dst = auth_branch_target(s, cpu_reg(s, 30), cpu_X[31], !a->m);
gen_a64_set_pc(s, dst);
s->base.is_jmp = DISAS_JUMP;
return true;
}
static bool trans_BRA(DisasContext *s, arg_bra *a)
{
TCGv_i64 dst;
if (!dc_isar_feature(aa64_pauth, s)) {
return false;
}
dst = auth_branch_target(s, cpu_reg(s,a->rn), cpu_reg_sp(s, a->rm), !a->m);
gen_a64_set_pc(s, dst);
set_btype_for_br(s, a->rn);
s->base.is_jmp = DISAS_JUMP;
return true;
}
static bool trans_BLRA(DisasContext *s, arg_bra *a)
{
TCGv_i64 dst, lr;
if (!dc_isar_feature(aa64_pauth, s)) {
return false;
}
dst = auth_branch_target(s, cpu_reg(s, a->rn), cpu_reg_sp(s, a->rm), !a->m);
lr = cpu_reg(s, 30);
if (dst == lr) {
TCGv_i64 tmp = tcg_temp_new_i64();
tcg_gen_mov_i64(tmp, dst);
dst = tmp;
}
gen_pc_plus_diff(s, lr, curr_insn_len(s));
gen_a64_set_pc(s, dst);
set_btype_for_blr(s);
s->base.is_jmp = DISAS_JUMP;
return true;
}
static bool trans_ERET(DisasContext *s, arg_ERET *a)
{
TCGv_i64 dst;
if (s->current_el == 0) {
return false;
}
if (s->trap_eret) {
gen_exception_insn_el(s, 0, EXCP_UDEF, syn_erettrap(0), 2);
return true;
}
dst = tcg_temp_new_i64();
tcg_gen_ld_i64(dst, tcg_env,
offsetof(CPUARMState, elr_el[s->current_el]));
translator_io_start(&s->base);
gen_helper_exception_return(tcg_env, dst);
/* Must exit loop to check un-masked IRQs */
s->base.is_jmp = DISAS_EXIT;
return true;
}
static bool trans_ERETA(DisasContext *s, arg_reta *a)
{
TCGv_i64 dst;
if (!dc_isar_feature(aa64_pauth, s)) {
return false;
}
if (s->current_el == 0) {
return false;
}
/* The FGT trap takes precedence over an auth trap. */
if (s->trap_eret) {
gen_exception_insn_el(s, 0, EXCP_UDEF, syn_erettrap(a->m ? 3 : 2), 2);
return true;
}
dst = tcg_temp_new_i64();
tcg_gen_ld_i64(dst, tcg_env,
offsetof(CPUARMState, elr_el[s->current_el]));
dst = auth_branch_target(s, dst, cpu_X[31], !a->m);
translator_io_start(&s->base);
gen_helper_exception_return(tcg_env, dst);
/* Must exit loop to check un-masked IRQs */
s->base.is_jmp = DISAS_EXIT;
return true;
}
static bool trans_NOP(DisasContext *s, arg_NOP *a)
{
return true;
}
static bool trans_YIELD(DisasContext *s, arg_YIELD *a)
{
/*
* When running in MTTCG we don't generate jumps to the yield and
* WFE helpers as it won't affect the scheduling of other vCPUs.
* If we wanted to more completely model WFE/SEV so we don't busy
* spin unnecessarily we would need to do something more involved.
*/
if (!(tb_cflags(s->base.tb) & CF_PARALLEL)) {
s->base.is_jmp = DISAS_YIELD;
}
return true;
}
static bool trans_WFI(DisasContext *s, arg_WFI *a)
{
s->base.is_jmp = DISAS_WFI;
return true;
}
static bool trans_WFE(DisasContext *s, arg_WFI *a)
{
/*
* When running in MTTCG we don't generate jumps to the yield and
* WFE helpers as it won't affect the scheduling of other vCPUs.
* If we wanted to more completely model WFE/SEV so we don't busy
* spin unnecessarily we would need to do something more involved.
*/
if (!(tb_cflags(s->base.tb) & CF_PARALLEL)) {
s->base.is_jmp = DISAS_WFE;
}
return true;
}
static bool trans_XPACLRI(DisasContext *s, arg_XPACLRI *a)
{
if (s->pauth_active) {
gen_helper_xpaci(cpu_X[30], tcg_env, cpu_X[30]);
}
return true;
}
static bool trans_PACIA1716(DisasContext *s, arg_PACIA1716 *a)
{
if (s->pauth_active) {
gen_helper_pacia(cpu_X[17], tcg_env, cpu_X[17], cpu_X[16]);
}
return true;
}
static bool trans_PACIB1716(DisasContext *s, arg_PACIB1716 *a)
{
if (s->pauth_active) {
gen_helper_pacib(cpu_X[17], tcg_env, cpu_X[17], cpu_X[16]);
}
return true;
}
static bool trans_AUTIA1716(DisasContext *s, arg_AUTIA1716 *a)
{
if (s->pauth_active) {
gen_helper_autia(cpu_X[17], tcg_env, cpu_X[17], cpu_X[16]);
}
return true;
}
static bool trans_AUTIB1716(DisasContext *s, arg_AUTIB1716 *a)
{
if (s->pauth_active) {
gen_helper_autib(cpu_X[17], tcg_env, cpu_X[17], cpu_X[16]);
}
return true;
}
static bool trans_ESB(DisasContext *s, arg_ESB *a)
{
/* Without RAS, we must implement this as NOP. */
if (dc_isar_feature(aa64_ras, s)) {
/*
* QEMU does not have a source of physical SErrors,
* so we are only concerned with virtual SErrors.
* The pseudocode in the ARM for this case is
* if PSTATE.EL IN {EL0, EL1} && EL2Enabled() then
* AArch64.vESBOperation();
* Most of the condition can be evaluated at translation time.
* Test for EL2 present, and defer test for SEL2 to runtime.
*/
if (s->current_el <= 1 && arm_dc_feature(s, ARM_FEATURE_EL2)) {
gen_helper_vesb(tcg_env);
}
}
return true;
}
static bool trans_PACIAZ(DisasContext *s, arg_PACIAZ *a)
{
if (s->pauth_active) {
gen_helper_pacia(cpu_X[30], tcg_env, cpu_X[30], tcg_constant_i64(0));
}
return true;
}
static bool trans_PACIASP(DisasContext *s, arg_PACIASP *a)
{
if (s->pauth_active) {
gen_helper_pacia(cpu_X[30], tcg_env, cpu_X[30], cpu_X[31]);
}
return true;
}
static bool trans_PACIBZ(DisasContext *s, arg_PACIBZ *a)
{
if (s->pauth_active) {
gen_helper_pacib(cpu_X[30], tcg_env, cpu_X[30], tcg_constant_i64(0));
}
return true;
}
static bool trans_PACIBSP(DisasContext *s, arg_PACIBSP *a)
{
if (s->pauth_active) {
gen_helper_pacib(cpu_X[30], tcg_env, cpu_X[30], cpu_X[31]);
}
return true;
}
static bool trans_AUTIAZ(DisasContext *s, arg_AUTIAZ *a)
{
if (s->pauth_active) {
gen_helper_autia(cpu_X[30], tcg_env, cpu_X[30], tcg_constant_i64(0));
}
return true;
}
static bool trans_AUTIASP(DisasContext *s, arg_AUTIASP *a)
{
if (s->pauth_active) {
gen_helper_autia(cpu_X[30], tcg_env, cpu_X[30], cpu_X[31]);
}
return true;
}
static bool trans_AUTIBZ(DisasContext *s, arg_AUTIBZ *a)
{
if (s->pauth_active) {
gen_helper_autib(cpu_X[30], tcg_env, cpu_X[30], tcg_constant_i64(0));
}
return true;
}
static bool trans_AUTIBSP(DisasContext *s, arg_AUTIBSP *a)
{
if (s->pauth_active) {
gen_helper_autib(cpu_X[30], tcg_env, cpu_X[30], cpu_X[31]);
}
return true;
}
static bool trans_CLREX(DisasContext *s, arg_CLREX *a)
{
tcg_gen_movi_i64(cpu_exclusive_addr, -1);
return true;
}
static bool trans_DSB_DMB(DisasContext *s, arg_DSB_DMB *a)
{
/* We handle DSB and DMB the same way */
TCGBar bar;
switch (a->types) {
case 1: /* MBReqTypes_Reads */
bar = TCG_BAR_SC | TCG_MO_LD_LD | TCG_MO_LD_ST;
break;
case 2: /* MBReqTypes_Writes */
bar = TCG_BAR_SC | TCG_MO_ST_ST;
break;
default: /* MBReqTypes_All */
bar = TCG_BAR_SC | TCG_MO_ALL;
break;
}
tcg_gen_mb(bar);
return true;
}
static bool trans_ISB(DisasContext *s, arg_ISB *a)
{
/*
* We need to break the TB after this insn to execute
* self-modifying code correctly and also to take
* any pending interrupts immediately.
*/
reset_btype(s);
gen_goto_tb(s, 0, 4);
return true;
}
static bool trans_SB(DisasContext *s, arg_SB *a)
{
if (!dc_isar_feature(aa64_sb, s)) {
return false;
}
/*
* TODO: There is no speculation barrier opcode for TCG;
* MB and end the TB instead.
*/
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_SC);
gen_goto_tb(s, 0, 4);
return true;
}
static bool trans_CFINV(DisasContext *s, arg_CFINV *a)
{
if (!dc_isar_feature(aa64_condm_4, s)) {
return false;
}
tcg_gen_xori_i32(cpu_CF, cpu_CF, 1);
return true;
}
static bool trans_XAFLAG(DisasContext *s, arg_XAFLAG *a)
{
TCGv_i32 z;
if (!dc_isar_feature(aa64_condm_5, s)) {
return false;
}
z = tcg_temp_new_i32();
tcg_gen_setcondi_i32(TCG_COND_EQ, z, cpu_ZF, 0);
/*
* (!C & !Z) << 31
* (!(C | Z)) << 31
* ~((C | Z) << 31)
* ~-(C | Z)
* (C | Z) - 1
*/
tcg_gen_or_i32(cpu_NF, cpu_CF, z);
tcg_gen_subi_i32(cpu_NF, cpu_NF, 1);
/* !(Z & C) */
tcg_gen_and_i32(cpu_ZF, z, cpu_CF);
tcg_gen_xori_i32(cpu_ZF, cpu_ZF, 1);
/* (!C & Z) << 31 -> -(Z & ~C) */
tcg_gen_andc_i32(cpu_VF, z, cpu_CF);
tcg_gen_neg_i32(cpu_VF, cpu_VF);
/* C | Z */
tcg_gen_or_i32(cpu_CF, cpu_CF, z);
return true;
}
static bool trans_AXFLAG(DisasContext *s, arg_AXFLAG *a)
{
if (!dc_isar_feature(aa64_condm_5, s)) {
return false;
}
tcg_gen_sari_i32(cpu_VF, cpu_VF, 31); /* V ? -1 : 0 */
tcg_gen_andc_i32(cpu_CF, cpu_CF, cpu_VF); /* C & !V */
/* !(Z | V) -> !(!ZF | V) -> ZF & !V -> ZF & ~VF */
tcg_gen_andc_i32(cpu_ZF, cpu_ZF, cpu_VF);
tcg_gen_movi_i32(cpu_NF, 0);
tcg_gen_movi_i32(cpu_VF, 0);
return true;
}
static bool trans_MSR_i_UAO(DisasContext *s, arg_i *a)
{
if (!dc_isar_feature(aa64_uao, s) || s->current_el == 0) {
return false;
}
if (a->imm & 1) {
set_pstate_bits(PSTATE_UAO);
} else {
clear_pstate_bits(PSTATE_UAO);
}
gen_rebuild_hflags(s);
s->base.is_jmp = DISAS_TOO_MANY;
return true;
}
static bool trans_MSR_i_PAN(DisasContext *s, arg_i *a)
{
if (!dc_isar_feature(aa64_pan, s) || s->current_el == 0) {
return false;
}
if (a->imm & 1) {
set_pstate_bits(PSTATE_PAN);
} else {
clear_pstate_bits(PSTATE_PAN);
}
gen_rebuild_hflags(s);
s->base.is_jmp = DISAS_TOO_MANY;
return true;
}
static bool trans_MSR_i_SPSEL(DisasContext *s, arg_i *a)
{
if (s->current_el == 0) {
return false;
}
gen_helper_msr_i_spsel(tcg_env, tcg_constant_i32(a->imm & PSTATE_SP));
s->base.is_jmp = DISAS_TOO_MANY;
return true;
}
static bool trans_MSR_i_SBSS(DisasContext *s, arg_i *a)
{
if (!dc_isar_feature(aa64_ssbs, s)) {
return false;
}
if (a->imm & 1) {
set_pstate_bits(PSTATE_SSBS);
} else {
clear_pstate_bits(PSTATE_SSBS);
}
/* Don't need to rebuild hflags since SSBS is a nop */
s->base.is_jmp = DISAS_TOO_MANY;
return true;
}
static bool trans_MSR_i_DIT(DisasContext *s, arg_i *a)
{
if (!dc_isar_feature(aa64_dit, s)) {
return false;
}
if (a->imm & 1) {
set_pstate_bits(PSTATE_DIT);
} else {
clear_pstate_bits(PSTATE_DIT);
}
/* There's no need to rebuild hflags because DIT is a nop */
s->base.is_jmp = DISAS_TOO_MANY;
return true;
}
static bool trans_MSR_i_TCO(DisasContext *s, arg_i *a)
{
if (dc_isar_feature(aa64_mte, s)) {
/* Full MTE is enabled -- set the TCO bit as directed. */
if (a->imm & 1) {
set_pstate_bits(PSTATE_TCO);
} else {
clear_pstate_bits(PSTATE_TCO);
}
gen_rebuild_hflags(s);
/* Many factors, including TCO, go into MTE_ACTIVE. */
s->base.is_jmp = DISAS_UPDATE_NOCHAIN;
return true;
} else if (dc_isar_feature(aa64_mte_insn_reg, s)) {
/* Only "instructions accessible at EL0" -- PSTATE.TCO is WI. */
return true;
} else {
/* Insn not present */
return false;
}
}
static bool trans_MSR_i_DAIFSET(DisasContext *s, arg_i *a)
{
gen_helper_msr_i_daifset(tcg_env, tcg_constant_i32(a->imm));
s->base.is_jmp = DISAS_TOO_MANY;
return true;
}
static bool trans_MSR_i_DAIFCLEAR(DisasContext *s, arg_i *a)
{
gen_helper_msr_i_daifclear(tcg_env, tcg_constant_i32(a->imm));
/* Exit the cpu loop to re-evaluate pending IRQs. */
s->base.is_jmp = DISAS_UPDATE_EXIT;
return true;
}
static bool trans_MSR_i_SVCR(DisasContext *s, arg_MSR_i_SVCR *a)
{
if (!dc_isar_feature(aa64_sme, s) || a->mask == 0) {
return false;
}
if (sme_access_check(s)) {
int old = s->pstate_sm | (s->pstate_za << 1);
int new = a->imm * 3;
if ((old ^ new) & a->mask) {
/* At least one bit changes. */
gen_helper_set_svcr(tcg_env, tcg_constant_i32(new),
tcg_constant_i32(a->mask));
s->base.is_jmp = DISAS_TOO_MANY;
}
}
return true;
}
static void gen_get_nzcv(TCGv_i64 tcg_rt)
{
TCGv_i32 tmp = tcg_temp_new_i32();
TCGv_i32 nzcv = tcg_temp_new_i32();
/* build bit 31, N */
tcg_gen_andi_i32(nzcv, cpu_NF, (1U << 31));
/* build bit 30, Z */
tcg_gen_setcondi_i32(TCG_COND_EQ, tmp, cpu_ZF, 0);
tcg_gen_deposit_i32(nzcv, nzcv, tmp, 30, 1);
/* build bit 29, C */
tcg_gen_deposit_i32(nzcv, nzcv, cpu_CF, 29, 1);
/* build bit 28, V */
tcg_gen_shri_i32(tmp, cpu_VF, 31);
tcg_gen_deposit_i32(nzcv, nzcv, tmp, 28, 1);
/* generate result */
tcg_gen_extu_i32_i64(tcg_rt, nzcv);
}
static void gen_set_nzcv(TCGv_i64 tcg_rt)
{
TCGv_i32 nzcv = tcg_temp_new_i32();
/* take NZCV from R[t] */
tcg_gen_extrl_i64_i32(nzcv, tcg_rt);
/* bit 31, N */
tcg_gen_andi_i32(cpu_NF, nzcv, (1U << 31));
/* bit 30, Z */
tcg_gen_andi_i32(cpu_ZF, nzcv, (1 << 30));
tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_ZF, cpu_ZF, 0);
/* bit 29, C */
tcg_gen_andi_i32(cpu_CF, nzcv, (1 << 29));
tcg_gen_shri_i32(cpu_CF, cpu_CF, 29);
/* bit 28, V */
tcg_gen_andi_i32(cpu_VF, nzcv, (1 << 28));
tcg_gen_shli_i32(cpu_VF, cpu_VF, 3);
}
static void gen_sysreg_undef(DisasContext *s, bool isread,
uint8_t op0, uint8_t op1, uint8_t op2,
uint8_t crn, uint8_t crm, uint8_t rt)
{
/*
* Generate code to emit an UNDEF with correct syndrome
* information for a failed system register access.
* This is EC_UNCATEGORIZED (ie a standard UNDEF) in most cases,
* but if FEAT_IDST is implemented then read accesses to registers
* in the feature ID space are reported with the EC_SYSTEMREGISTERTRAP
* syndrome.
*/
uint32_t syndrome;
if (isread && dc_isar_feature(aa64_ids, s) &&
arm_cpreg_encoding_in_idspace(op0, op1, op2, crn, crm)) {
syndrome = syn_aa64_sysregtrap(op0, op1, op2, crn, crm, rt, isread);
} else {
syndrome = syn_uncategorized();
}
gen_exception_insn(s, 0, EXCP_UDEF, syndrome);
}
/* MRS - move from system register
* MSR (register) - move to system register
* SYS
* SYSL
* These are all essentially the same insn in 'read' and 'write'
* versions, with varying op0 fields.
*/
static void handle_sys(DisasContext *s, bool isread,
unsigned int op0, unsigned int op1, unsigned int op2,
unsigned int crn, unsigned int crm, unsigned int rt)
{
uint32_t key = ENCODE_AA64_CP_REG(CP_REG_ARM64_SYSREG_CP,
crn, crm, op0, op1, op2);
const ARMCPRegInfo *ri = get_arm_cp_reginfo(s->cp_regs, key);
bool need_exit_tb = false;
bool nv_trap_to_el2 = false;
bool nv_redirect_reg = false;
bool skip_fp_access_checks = false;
bool nv2_mem_redirect = false;
TCGv_ptr tcg_ri = NULL;
TCGv_i64 tcg_rt;
uint32_t syndrome = syn_aa64_sysregtrap(op0, op1, op2, crn, crm, rt, isread);
if (crn == 11 || crn == 15) {
/*
* Check for TIDCP trap, which must take precedence over
* the UNDEF for "no such register" etc.
*/
switch (s->current_el) {
case 0:
if (dc_isar_feature(aa64_tidcp1, s)) {
gen_helper_tidcp_el0(tcg_env, tcg_constant_i32(syndrome));
}
break;
case 1:
gen_helper_tidcp_el1(tcg_env, tcg_constant_i32(syndrome));
break;
}
}
if (!ri) {
/* Unknown register; this might be a guest error or a QEMU
* unimplemented feature.
*/
qemu_log_mask(LOG_UNIMP, "%s access to unsupported AArch64 "
"system register op0:%d op1:%d crn:%d crm:%d op2:%d\n",
isread ? "read" : "write", op0, op1, crn, crm, op2);
gen_sysreg_undef(s, isread, op0, op1, op2, crn, crm, rt);
return;
}
if (s->nv2 && ri->nv2_redirect_offset) {
/*
* Some registers always redirect to memory; some only do so if
* HCR_EL2.NV1 is 0, and some only if NV1 is 1 (these come in
* pairs which share an offset; see the table in R_CSRPQ).
*/
if (ri->nv2_redirect_offset & NV2_REDIR_NV1) {
nv2_mem_redirect = s->nv1;
} else if (ri->nv2_redirect_offset & NV2_REDIR_NO_NV1) {
nv2_mem_redirect = !s->nv1;
} else {
nv2_mem_redirect = true;
}
}
/* Check access permissions */
if (!cp_access_ok(s->current_el, ri, isread)) {
/*
* FEAT_NV/NV2 handling does not do the usual FP access checks
* for registers only accessible at EL2 (though it *does* do them
* for registers accessible at EL1).
*/
skip_fp_access_checks = true;
if (s->nv2 && (ri->type & ARM_CP_NV2_REDIRECT)) {
/*
* This is one of the few EL2 registers which should redirect
* to the equivalent EL1 register. We do that after running
* the EL2 register's accessfn.
*/
nv_redirect_reg = true;
assert(!nv2_mem_redirect);
} else if (nv2_mem_redirect) {
/*
* NV2 redirect-to-memory takes precedence over trap to EL2 or
* UNDEF to EL1.
*/
} else if (s->nv && arm_cpreg_traps_in_nv(ri)) {
/*
* This register / instruction exists and is an EL2 register, so
* we must trap to EL2 if accessed in nested virtualization EL1
* instead of UNDEFing. We'll do that after the usual access checks.
* (This makes a difference only for a couple of registers like
* VSTTBR_EL2 where the "UNDEF if NonSecure" should take priority
* over the trap-to-EL2. Most trapped-by-FEAT_NV registers have
* an accessfn which does nothing when called from EL1, because
* the trap-to-EL3 controls which would apply to that register
* at EL2 don't take priority over the FEAT_NV trap-to-EL2.)
*/
nv_trap_to_el2 = true;
} else {
gen_sysreg_undef(s, isread, op0, op1, op2, crn, crm, rt);
return;
}
}
if (ri->accessfn || (ri->fgt && s->fgt_active)) {
/* Emit code to perform further access permissions checks at
* runtime; this may result in an exception.
*/
gen_a64_update_pc(s, 0);
tcg_ri = tcg_temp_new_ptr();
gen_helper_access_check_cp_reg(tcg_ri, tcg_env,
tcg_constant_i32(key),
tcg_constant_i32(syndrome),
tcg_constant_i32(isread));
} else if (ri->type & ARM_CP_RAISES_EXC) {
/*
* The readfn or writefn might raise an exception;
* synchronize the CPU state in case it does.
*/
gen_a64_update_pc(s, 0);
}
if (!skip_fp_access_checks) {
if ((ri->type & ARM_CP_FPU) && !fp_access_check_only(s)) {
return;
} else if ((ri->type & ARM_CP_SVE) && !sve_access_check(s)) {
return;
} else if ((ri->type & ARM_CP_SME) && !sme_access_check(s)) {
return;
}
}
if (nv_trap_to_el2) {
gen_exception_insn_el(s, 0, EXCP_UDEF, syndrome, 2);
return;
}
if (nv_redirect_reg) {
/*
* FEAT_NV2 redirection of an EL2 register to an EL1 register.
* Conveniently in all cases the encoding of the EL1 register is
* identical to the EL2 register except that opc1 is 0.
* Get the reginfo for the EL1 register to use for the actual access.
* We don't use the EL1 register's access function, and
* fine-grained-traps on EL1 also do not apply here.
*/
key = ENCODE_AA64_CP_REG(CP_REG_ARM64_SYSREG_CP,
crn, crm, op0, 0, op2);
ri = get_arm_cp_reginfo(s->cp_regs, key);
assert(ri);
assert(cp_access_ok(s->current_el, ri, isread));
/*
* We might not have done an update_pc earlier, so check we don't
* need it. We could support this in future if necessary.
*/
assert(!(ri->type & ARM_CP_RAISES_EXC));
}
if (nv2_mem_redirect) {
/*
* This system register is being redirected into an EL2 memory access.
* This means it is not an IO operation, doesn't change hflags,
* and need not end the TB, because it has no side effects.
*
* The access is 64-bit single copy atomic, guaranteed aligned because
* of the definition of VCNR_EL2. Its endianness depends on
* SCTLR_EL2.EE, not on the data endianness of EL1.
* It is done under either the EL2 translation regime or the EL2&0
* translation regime, depending on HCR_EL2.E2H. It behaves as if
* PSTATE.PAN is 0.
*/
TCGv_i64 ptr = tcg_temp_new_i64();
MemOp mop = MO_64 | MO_ALIGN | MO_ATOM_IFALIGN;
ARMMMUIdx armmemidx = s->nv2_mem_e20 ? ARMMMUIdx_E20_2 : ARMMMUIdx_E2;
int memidx = arm_to_core_mmu_idx(armmemidx);
uint32_t syn;
mop |= (s->nv2_mem_be ? MO_BE : MO_LE);
tcg_gen_ld_i64(ptr, tcg_env, offsetof(CPUARMState, cp15.vncr_el2));
tcg_gen_addi_i64(ptr, ptr,
(ri->nv2_redirect_offset & ~NV2_REDIR_FLAG_MASK));
tcg_rt = cpu_reg(s, rt);
syn = syn_data_abort_vncr(0, !isread, 0);
disas_set_insn_syndrome(s, syn);
if (isread) {
tcg_gen_qemu_ld_i64(tcg_rt, ptr, memidx, mop);
} else {
tcg_gen_qemu_st_i64(tcg_rt, ptr, memidx, mop);
}
return;
}
/* Handle special cases first */
switch (ri->type & ARM_CP_SPECIAL_MASK) {
case 0:
break;
case ARM_CP_NOP:
return;
case ARM_CP_NZCV:
tcg_rt = cpu_reg(s, rt);
if (isread) {
gen_get_nzcv(tcg_rt);
} else {
gen_set_nzcv(tcg_rt);
}
return;
case ARM_CP_CURRENTEL:
{
/*
* Reads as current EL value from pstate, which is
* guaranteed to be constant by the tb flags.
* For nested virt we should report EL2.
*/
int el = s->nv ? 2 : s->current_el;
tcg_rt = cpu_reg(s, rt);
tcg_gen_movi_i64(tcg_rt, el << 2);
return;
}
case ARM_CP_DC_ZVA:
/* Writes clear the aligned block of memory which rt points into. */
if (s->mte_active[0]) {
int desc = 0;
desc = FIELD_DP32(desc, MTEDESC, MIDX, get_mem_index(s));
desc = FIELD_DP32(desc, MTEDESC, TBI, s->tbid);
desc = FIELD_DP32(desc, MTEDESC, TCMA, s->tcma);
tcg_rt = tcg_temp_new_i64();
gen_helper_mte_check_zva(tcg_rt, tcg_env,
tcg_constant_i32(desc), cpu_reg(s, rt));
} else {
tcg_rt = clean_data_tbi(s, cpu_reg(s, rt));
}
gen_helper_dc_zva(tcg_env, tcg_rt);
return;
case ARM_CP_DC_GVA:
{
TCGv_i64 clean_addr, tag;
/*
* DC_GVA, like DC_ZVA, requires that we supply the original
* pointer for an invalid page. Probe that address first.
*/
tcg_rt = cpu_reg(s, rt);
clean_addr = clean_data_tbi(s, tcg_rt);
gen_probe_access(s, clean_addr, MMU_DATA_STORE, MO_8);
if (s->ata[0]) {
/* Extract the tag from the register to match STZGM. */
tag = tcg_temp_new_i64();
tcg_gen_shri_i64(tag, tcg_rt, 56);
gen_helper_stzgm_tags(tcg_env, clean_addr, tag);
}
}
return;
case ARM_CP_DC_GZVA:
{
TCGv_i64 clean_addr, tag;
/* For DC_GZVA, we can rely on DC_ZVA for the proper fault. */
tcg_rt = cpu_reg(s, rt);
clean_addr = clean_data_tbi(s, tcg_rt);
gen_helper_dc_zva(tcg_env, clean_addr);
if (s->ata[0]) {
/* Extract the tag from the register to match STZGM. */
tag = tcg_temp_new_i64();
tcg_gen_shri_i64(tag, tcg_rt, 56);
gen_helper_stzgm_tags(tcg_env, clean_addr, tag);
}
}
return;
default:
g_assert_not_reached();
}
if (ri->type & ARM_CP_IO) {
/* I/O operations must end the TB here (whether read or write) */
need_exit_tb = translator_io_start(&s->base);
}
tcg_rt = cpu_reg(s, rt);
if (isread) {
if (ri->type & ARM_CP_CONST) {
tcg_gen_movi_i64(tcg_rt, ri->resetvalue);
} else if (ri->readfn) {
if (!tcg_ri) {
tcg_ri = gen_lookup_cp_reg(key);
}
gen_helper_get_cp_reg64(tcg_rt, tcg_env, tcg_ri);
} else {
tcg_gen_ld_i64(tcg_rt, tcg_env, ri->fieldoffset);
}
} else {
if (ri->type & ARM_CP_CONST) {
/* If not forbidden by access permissions, treat as WI */
return;
} else if (ri->writefn) {
if (!tcg_ri) {
tcg_ri = gen_lookup_cp_reg(key);
}
gen_helper_set_cp_reg64(tcg_env, tcg_ri, tcg_rt);
} else {
tcg_gen_st_i64(tcg_rt, tcg_env, ri->fieldoffset);
}
}
if (!isread && !(ri->type & ARM_CP_SUPPRESS_TB_END)) {
/*
* A write to any coprocessor register that ends a TB
* must rebuild the hflags for the next TB.
*/
gen_rebuild_hflags(s);
/*
* We default to ending the TB on a coprocessor register write,
* but allow this to be suppressed by the register definition
* (usually only necessary to work around guest bugs).
*/
need_exit_tb = true;
}
if (need_exit_tb) {
s->base.is_jmp = DISAS_UPDATE_EXIT;
}
}
static bool trans_SYS(DisasContext *s, arg_SYS *a)
{
handle_sys(s, a->l, a->op0, a->op1, a->op2, a->crn, a->crm, a->rt);
return true;
}
static bool trans_SVC(DisasContext *s, arg_i *a)
{
/*
* For SVC, HVC and SMC we advance the single-step state
* machine before taking the exception. This is architecturally
* mandated, to ensure that single-stepping a system call
* instruction works properly.
*/
uint32_t syndrome = syn_aa64_svc(a->imm);
if (s->fgt_svc) {
gen_exception_insn_el(s, 0, EXCP_UDEF, syndrome, 2);
return true;
}
gen_ss_advance(s);
gen_exception_insn(s, 4, EXCP_SWI, syndrome);
return true;
}
static bool trans_HVC(DisasContext *s, arg_i *a)
{
int target_el = s->current_el == 3 ? 3 : 2;
if (s->current_el == 0) {
unallocated_encoding(s);
return true;
}
/*
* The pre HVC helper handles cases when HVC gets trapped
* as an undefined insn by runtime configuration.
*/
gen_a64_update_pc(s, 0);
gen_helper_pre_hvc(tcg_env);
/* Architecture requires ss advance before we do the actual work */
gen_ss_advance(s);
gen_exception_insn_el(s, 4, EXCP_HVC, syn_aa64_hvc(a->imm), target_el);
return true;
}
static bool trans_SMC(DisasContext *s, arg_i *a)
{
if (s->current_el == 0) {
unallocated_encoding(s);
return true;
}
gen_a64_update_pc(s, 0);
gen_helper_pre_smc(tcg_env, tcg_constant_i32(syn_aa64_smc(a->imm)));
/* Architecture requires ss advance before we do the actual work */
gen_ss_advance(s);
gen_exception_insn_el(s, 4, EXCP_SMC, syn_aa64_smc(a->imm), 3);
return true;
}
static bool trans_BRK(DisasContext *s, arg_i *a)
{
gen_exception_bkpt_insn(s, syn_aa64_bkpt(a->imm));
return true;
}
static bool trans_HLT(DisasContext *s, arg_i *a)
{
/*
* HLT. This has two purposes.
* Architecturally, it is an external halting debug instruction.
* Since QEMU doesn't implement external debug, we treat this as
* it is required for halting debug disabled: it will UNDEF.
* Secondly, "HLT 0xf000" is the A64 semihosting syscall instruction.
*/
if (semihosting_enabled(s->current_el == 0) && a->imm == 0xf000) {
gen_exception_internal_insn(s, EXCP_SEMIHOST);
} else {
unallocated_encoding(s);
}
return true;
}
/*
* Load/Store exclusive instructions are implemented by remembering
* the value/address loaded, and seeing if these are the same
* when the store is performed. This is not actually the architecturally
* mandated semantics, but it works for typical guest code sequences
* and avoids having to monitor regular stores.
*
* The store exclusive uses the atomic cmpxchg primitives to avoid
* races in multi-threaded linux-user and when MTTCG softmmu is
* enabled.
*/
static void gen_load_exclusive(DisasContext *s, int rt, int rt2, int rn,
int size, bool is_pair)
{
int idx = get_mem_index(s);
TCGv_i64 dirty_addr, clean_addr;
MemOp memop = check_atomic_align(s, rn, size + is_pair);
s->is_ldex = true;
dirty_addr = cpu_reg_sp(s, rn);
clean_addr = gen_mte_check1(s, dirty_addr, false, rn != 31, memop);
g_assert(size <= 3);
if (is_pair) {
g_assert(size >= 2);
if (size == 2) {
tcg_gen_qemu_ld_i64(cpu_exclusive_val, clean_addr, idx, memop);
if (s->be_data == MO_LE) {
tcg_gen_extract_i64(cpu_reg(s, rt), cpu_exclusive_val, 0, 32);
tcg_gen_extract_i64(cpu_reg(s, rt2), cpu_exclusive_val, 32, 32);
} else {
tcg_gen_extract_i64(cpu_reg(s, rt), cpu_exclusive_val, 32, 32);
tcg_gen_extract_i64(cpu_reg(s, rt2), cpu_exclusive_val, 0, 32);
}
} else {
TCGv_i128 t16 = tcg_temp_new_i128();
tcg_gen_qemu_ld_i128(t16, clean_addr, idx, memop);
if (s->be_data == MO_LE) {
tcg_gen_extr_i128_i64(cpu_exclusive_val,
cpu_exclusive_high, t16);
} else {
tcg_gen_extr_i128_i64(cpu_exclusive_high,
cpu_exclusive_val, t16);
}
tcg_gen_mov_i64(cpu_reg(s, rt), cpu_exclusive_val);
tcg_gen_mov_i64(cpu_reg(s, rt2), cpu_exclusive_high);
}
} else {
tcg_gen_qemu_ld_i64(cpu_exclusive_val, clean_addr, idx, memop);
tcg_gen_mov_i64(cpu_reg(s, rt), cpu_exclusive_val);
}
tcg_gen_mov_i64(cpu_exclusive_addr, clean_addr);
}
static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2,
int rn, int size, int is_pair)
{
/* if (env->exclusive_addr == addr && env->exclusive_val == [addr]
* && (!is_pair || env->exclusive_high == [addr + datasize])) {
* [addr] = {Rt};
* if (is_pair) {
* [addr + datasize] = {Rt2};
* }
* {Rd} = 0;
* } else {
* {Rd} = 1;
* }
* env->exclusive_addr = -1;
*/
TCGLabel *fail_label = gen_new_label();
TCGLabel *done_label = gen_new_label();
TCGv_i64 tmp, clean_addr;
MemOp memop;
/*
* FIXME: We are out of spec here. We have recorded only the address
* from load_exclusive, not the entire range, and we assume that the
* size of the access on both sides match. The architecture allows the
* store to be smaller than the load, so long as the stored bytes are
* within the range recorded by the load.
*/
/* See AArch64.ExclusiveMonitorsPass() and AArch64.IsExclusiveVA(). */
clean_addr = clean_data_tbi(s, cpu_reg_sp(s, rn));
tcg_gen_brcond_i64(TCG_COND_NE, clean_addr, cpu_exclusive_addr, fail_label);
/*
* The write, and any associated faults, only happen if the virtual
* and physical addresses pass the exclusive monitor check. These
* faults are exceedingly unlikely, because normally the guest uses
* the exact same address register for the load_exclusive, and we
* would have recognized these faults there.
*
* It is possible to trigger an alignment fault pre-LSE2, e.g. with an
* unaligned 4-byte write within the range of an aligned 8-byte load.
* With LSE2, the store would need to cross a 16-byte boundary when the
* load did not, which would mean the store is outside the range
* recorded for the monitor, which would have failed a corrected monitor
* check above. For now, we assume no size change and retain the
* MO_ALIGN to let tcg know what we checked in the load_exclusive.
*
* It is possible to trigger an MTE fault, by performing the load with
* a virtual address with a valid tag and performing the store with the
* same virtual address and a different invalid tag.
*/
memop = size + is_pair;
if (memop == MO_128 || !dc_isar_feature(aa64_lse2, s)) {
memop |= MO_ALIGN;
}
memop = finalize_memop(s, memop);
gen_mte_check1(s, cpu_reg_sp(s, rn), true, rn != 31, memop);
tmp = tcg_temp_new_i64();
if (is_pair) {
if (size == 2) {
if (s->be_data == MO_LE) {
tcg_gen_concat32_i64(tmp, cpu_reg(s, rt), cpu_reg(s, rt2));
} else {
tcg_gen_concat32_i64(tmp, cpu_reg(s, rt2), cpu_reg(s, rt));
}
tcg_gen_atomic_cmpxchg_i64(tmp, cpu_exclusive_addr,
cpu_exclusive_val, tmp,
get_mem_index(s), memop);
tcg_gen_setcond_i64(TCG_COND_NE, tmp, tmp, cpu_exclusive_val);
} else {
TCGv_i128 t16 = tcg_temp_new_i128();
TCGv_i128 c16 = tcg_temp_new_i128();
TCGv_i64 a, b;
if (s->be_data == MO_LE) {
tcg_gen_concat_i64_i128(t16, cpu_reg(s, rt), cpu_reg(s, rt2));
tcg_gen_concat_i64_i128(c16, cpu_exclusive_val,
cpu_exclusive_high);
} else {
tcg_gen_concat_i64_i128(t16, cpu_reg(s, rt2), cpu_reg(s, rt));
tcg_gen_concat_i64_i128(c16, cpu_exclusive_high,
cpu_exclusive_val);
}
tcg_gen_atomic_cmpxchg_i128(t16, cpu_exclusive_addr, c16, t16,
get_mem_index(s), memop);
a = tcg_temp_new_i64();
b = tcg_temp_new_i64();
if (s->be_data == MO_LE) {
tcg_gen_extr_i128_i64(a, b, t16);
} else {
tcg_gen_extr_i128_i64(b, a, t16);
}
tcg_gen_xor_i64(a, a, cpu_exclusive_val);
tcg_gen_xor_i64(b, b, cpu_exclusive_high);
tcg_gen_or_i64(tmp, a, b);
tcg_gen_setcondi_i64(TCG_COND_NE, tmp, tmp, 0);
}
} else {
tcg_gen_atomic_cmpxchg_i64(tmp, cpu_exclusive_addr, cpu_exclusive_val,
cpu_reg(s, rt), get_mem_index(s), memop);
tcg_gen_setcond_i64(TCG_COND_NE, tmp, tmp, cpu_exclusive_val);
}
tcg_gen_mov_i64(cpu_reg(s, rd), tmp);
tcg_gen_br(done_label);
gen_set_label(fail_label);
tcg_gen_movi_i64(cpu_reg(s, rd), 1);
gen_set_label(done_label);
tcg_gen_movi_i64(cpu_exclusive_addr, -1);
}
static void gen_compare_and_swap(DisasContext *s, int rs, int rt,
int rn, int size)
{
TCGv_i64 tcg_rs = cpu_reg(s, rs);
TCGv_i64 tcg_rt = cpu_reg(s, rt);
int memidx = get_mem_index(s);
TCGv_i64 clean_addr;
MemOp memop;
if (rn == 31) {
gen_check_sp_alignment(s);
}
memop = check_atomic_align(s, rn, size);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn), true, rn != 31, memop);
tcg_gen_atomic_cmpxchg_i64(tcg_rs, clean_addr, tcg_rs, tcg_rt,
memidx, memop);
}
static void gen_compare_and_swap_pair(DisasContext *s, int rs, int rt,
int rn, int size)
{
TCGv_i64 s1 = cpu_reg(s, rs);
TCGv_i64 s2 = cpu_reg(s, rs + 1);
TCGv_i64 t1 = cpu_reg(s, rt);
TCGv_i64 t2 = cpu_reg(s, rt + 1);
TCGv_i64 clean_addr;
int memidx = get_mem_index(s);
MemOp memop;
if (rn == 31) {
gen_check_sp_alignment(s);
}
/* This is a single atomic access, despite the "pair". */
memop = check_atomic_align(s, rn, size + 1);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn), true, rn != 31, memop);
if (size == 2) {
TCGv_i64 cmp = tcg_temp_new_i64();
TCGv_i64 val = tcg_temp_new_i64();
if (s->be_data == MO_LE) {
tcg_gen_concat32_i64(val, t1, t2);
tcg_gen_concat32_i64(cmp, s1, s2);
} else {
tcg_gen_concat32_i64(val, t2, t1);
tcg_gen_concat32_i64(cmp, s2, s1);
}
tcg_gen_atomic_cmpxchg_i64(cmp, clean_addr, cmp, val, memidx, memop);
if (s->be_data == MO_LE) {
tcg_gen_extr32_i64(s1, s2, cmp);
} else {
tcg_gen_extr32_i64(s2, s1, cmp);
}
} else {
TCGv_i128 cmp = tcg_temp_new_i128();
TCGv_i128 val = tcg_temp_new_i128();
if (s->be_data == MO_LE) {
tcg_gen_concat_i64_i128(val, t1, t2);
tcg_gen_concat_i64_i128(cmp, s1, s2);
} else {
tcg_gen_concat_i64_i128(val, t2, t1);
tcg_gen_concat_i64_i128(cmp, s2, s1);
}
tcg_gen_atomic_cmpxchg_i128(cmp, clean_addr, cmp, val, memidx, memop);
if (s->be_data == MO_LE) {
tcg_gen_extr_i128_i64(s1, s2, cmp);
} else {
tcg_gen_extr_i128_i64(s2, s1, cmp);
}
}
}
/*
* Compute the ISS.SF bit for syndrome information if an exception
* is taken on a load or store. This indicates whether the instruction
* is accessing a 32-bit or 64-bit register. This logic is derived
* from the ARMv8 specs for LDR (Shared decode for all encodings).
*/
static bool ldst_iss_sf(int size, bool sign, bool ext)
{
if (sign) {
/*
* Signed loads are 64 bit results if we are not going to
* do a zero-extend from 32 to 64 after the load.
* (For a store, sign and ext are always false.)
*/
return !ext;
} else {
/* Unsigned loads/stores work at the specified size */
return size == MO_64;
}
}
static bool trans_STXR(DisasContext *s, arg_stxr *a)
{
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
if (a->lasr) {
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL);
}
gen_store_exclusive(s, a->rs, a->rt, a->rt2, a->rn, a->sz, false);
return true;
}
static bool trans_LDXR(DisasContext *s, arg_stxr *a)
{
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
gen_load_exclusive(s, a->rt, a->rt2, a->rn, a->sz, false);
if (a->lasr) {
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
}
return true;
}
static bool trans_STLR(DisasContext *s, arg_stlr *a)
{
TCGv_i64 clean_addr;
MemOp memop;
bool iss_sf = ldst_iss_sf(a->sz, false, false);
/*
* StoreLORelease is the same as Store-Release for QEMU, but
* needs the feature-test.
*/
if (!a->lasr && !dc_isar_feature(aa64_lor, s)) {
return false;
}
/* Generate ISS for non-exclusive accesses including LASR. */
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL);
memop = check_ordered_align(s, a->rn, 0, true, a->sz);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, a->rn),
true, a->rn != 31, memop);
do_gpr_st(s, cpu_reg(s, a->rt), clean_addr, memop, true, a->rt,
iss_sf, a->lasr);
return true;
}
static bool trans_LDAR(DisasContext *s, arg_stlr *a)
{
TCGv_i64 clean_addr;
MemOp memop;
bool iss_sf = ldst_iss_sf(a->sz, false, false);
/* LoadLOAcquire is the same as Load-Acquire for QEMU. */
if (!a->lasr && !dc_isar_feature(aa64_lor, s)) {
return false;
}
/* Generate ISS for non-exclusive accesses including LASR. */
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
memop = check_ordered_align(s, a->rn, 0, false, a->sz);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, a->rn),
false, a->rn != 31, memop);
do_gpr_ld(s, cpu_reg(s, a->rt), clean_addr, memop, false, true,
a->rt, iss_sf, a->lasr);
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
return true;
}
static bool trans_STXP(DisasContext *s, arg_stxr *a)
{
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
if (a->lasr) {
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL);
}
gen_store_exclusive(s, a->rs, a->rt, a->rt2, a->rn, a->sz, true);
return true;
}
static bool trans_LDXP(DisasContext *s, arg_stxr *a)
{
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
gen_load_exclusive(s, a->rt, a->rt2, a->rn, a->sz, true);
if (a->lasr) {
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
}
return true;
}
static bool trans_CASP(DisasContext *s, arg_CASP *a)
{
if (!dc_isar_feature(aa64_atomics, s)) {
return false;
}
if (((a->rt | a->rs) & 1) != 0) {
return false;
}
gen_compare_and_swap_pair(s, a->rs, a->rt, a->rn, a->sz);
return true;
}
static bool trans_CAS(DisasContext *s, arg_CAS *a)
{
if (!dc_isar_feature(aa64_atomics, s)) {
return false;
}
gen_compare_and_swap(s, a->rs, a->rt, a->rn, a->sz);
return true;
}
static bool trans_LD_lit(DisasContext *s, arg_ldlit *a)
{
bool iss_sf = ldst_iss_sf(a->sz, a->sign, false);
TCGv_i64 tcg_rt = cpu_reg(s, a->rt);
TCGv_i64 clean_addr = tcg_temp_new_i64();
MemOp memop = finalize_memop(s, a->sz + a->sign * MO_SIGN);
gen_pc_plus_diff(s, clean_addr, a->imm);
do_gpr_ld(s, tcg_rt, clean_addr, memop,
false, true, a->rt, iss_sf, false);
return true;
}
static bool trans_LD_lit_v(DisasContext *s, arg_ldlit *a)
{
/* Load register (literal), vector version */
TCGv_i64 clean_addr;
MemOp memop;
if (!fp_access_check(s)) {
return true;
}
memop = finalize_memop_asimd(s, a->sz);
clean_addr = tcg_temp_new_i64();
gen_pc_plus_diff(s, clean_addr, a->imm);
do_fp_ld(s, a->rt, clean_addr, memop);
return true;
}
static void op_addr_ldstpair_pre(DisasContext *s, arg_ldstpair *a,
TCGv_i64 *clean_addr, TCGv_i64 *dirty_addr,
uint64_t offset, bool is_store, MemOp mop)
{
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
*dirty_addr = read_cpu_reg_sp(s, a->rn, 1);
if (!a->p) {
tcg_gen_addi_i64(*dirty_addr, *dirty_addr, offset);
}
*clean_addr = gen_mte_checkN(s, *dirty_addr, is_store,
(a->w || a->rn != 31), 2 << a->sz, mop);
}
static void op_addr_ldstpair_post(DisasContext *s, arg_ldstpair *a,
TCGv_i64 dirty_addr, uint64_t offset)
{
if (a->w) {
if (a->p) {
tcg_gen_addi_i64(dirty_addr, dirty_addr, offset);
}
tcg_gen_mov_i64(cpu_reg_sp(s, a->rn), dirty_addr);
}
}
static bool trans_STP(DisasContext *s, arg_ldstpair *a)
{
uint64_t offset = a->imm << a->sz;
TCGv_i64 clean_addr, dirty_addr, tcg_rt, tcg_rt2;
MemOp mop = finalize_memop(s, a->sz);
op_addr_ldstpair_pre(s, a, &clean_addr, &dirty_addr, offset, true, mop);
tcg_rt = cpu_reg(s, a->rt);
tcg_rt2 = cpu_reg(s, a->rt2);
/*
* We built mop above for the single logical access -- rebuild it
* now for the paired operation.
*
* With LSE2, non-sign-extending pairs are treated atomically if
* aligned, and if unaligned one of the pair will be completely
* within a 16-byte block and that element will be atomic.
* Otherwise each element is separately atomic.
* In all cases, issue one operation with the correct atomicity.
*/
mop = a->sz + 1;
if (s->align_mem) {
mop |= (a->sz == 2 ? MO_ALIGN_4 : MO_ALIGN_8);
}
mop = finalize_memop_pair(s, mop);
if (a->sz == 2) {
TCGv_i64 tmp = tcg_temp_new_i64();
if (s->be_data == MO_LE) {
tcg_gen_concat32_i64(tmp, tcg_rt, tcg_rt2);
} else {
tcg_gen_concat32_i64(tmp, tcg_rt2, tcg_rt);
}
tcg_gen_qemu_st_i64(tmp, clean_addr, get_mem_index(s), mop);
} else {
TCGv_i128 tmp = tcg_temp_new_i128();
if (s->be_data == MO_LE) {
tcg_gen_concat_i64_i128(tmp, tcg_rt, tcg_rt2);
} else {
tcg_gen_concat_i64_i128(tmp, tcg_rt2, tcg_rt);
}
tcg_gen_qemu_st_i128(tmp, clean_addr, get_mem_index(s), mop);
}
op_addr_ldstpair_post(s, a, dirty_addr, offset);
return true;
}
static bool trans_LDP(DisasContext *s, arg_ldstpair *a)
{
uint64_t offset = a->imm << a->sz;
TCGv_i64 clean_addr, dirty_addr, tcg_rt, tcg_rt2;
MemOp mop = finalize_memop(s, a->sz);
op_addr_ldstpair_pre(s, a, &clean_addr, &dirty_addr, offset, false, mop);
tcg_rt = cpu_reg(s, a->rt);
tcg_rt2 = cpu_reg(s, a->rt2);
/*
* We built mop above for the single logical access -- rebuild it
* now for the paired operation.
*
* With LSE2, non-sign-extending pairs are treated atomically if
* aligned, and if unaligned one of the pair will be completely
* within a 16-byte block and that element will be atomic.
* Otherwise each element is separately atomic.
* In all cases, issue one operation with the correct atomicity.
*
* This treats sign-extending loads like zero-extending loads,
* since that reuses the most code below.
*/
mop = a->sz + 1;
if (s->align_mem) {
mop |= (a->sz == 2 ? MO_ALIGN_4 : MO_ALIGN_8);
}
mop = finalize_memop_pair(s, mop);
if (a->sz == 2) {
int o2 = s->be_data == MO_LE ? 32 : 0;
int o1 = o2 ^ 32;
tcg_gen_qemu_ld_i64(tcg_rt, clean_addr, get_mem_index(s), mop);
if (a->sign) {
tcg_gen_sextract_i64(tcg_rt2, tcg_rt, o2, 32);
tcg_gen_sextract_i64(tcg_rt, tcg_rt, o1, 32);
} else {
tcg_gen_extract_i64(tcg_rt2, tcg_rt, o2, 32);
tcg_gen_extract_i64(tcg_rt, tcg_rt, o1, 32);
}
} else {
TCGv_i128 tmp = tcg_temp_new_i128();
tcg_gen_qemu_ld_i128(tmp, clean_addr, get_mem_index(s), mop);
if (s->be_data == MO_LE) {
tcg_gen_extr_i128_i64(tcg_rt, tcg_rt2, tmp);
} else {
tcg_gen_extr_i128_i64(tcg_rt2, tcg_rt, tmp);
}
}
op_addr_ldstpair_post(s, a, dirty_addr, offset);
return true;
}
static bool trans_STP_v(DisasContext *s, arg_ldstpair *a)
{
uint64_t offset = a->imm << a->sz;
TCGv_i64 clean_addr, dirty_addr;
MemOp mop;
if (!fp_access_check(s)) {
return true;
}
/* LSE2 does not merge FP pairs; leave these as separate operations. */
mop = finalize_memop_asimd(s, a->sz);
op_addr_ldstpair_pre(s, a, &clean_addr, &dirty_addr, offset, true, mop);
do_fp_st(s, a->rt, clean_addr, mop);
tcg_gen_addi_i64(clean_addr, clean_addr, 1 << a->sz);
do_fp_st(s, a->rt2, clean_addr, mop);
op_addr_ldstpair_post(s, a, dirty_addr, offset);
return true;
}
static bool trans_LDP_v(DisasContext *s, arg_ldstpair *a)
{
uint64_t offset = a->imm << a->sz;
TCGv_i64 clean_addr, dirty_addr;
MemOp mop;
if (!fp_access_check(s)) {
return true;
}
/* LSE2 does not merge FP pairs; leave these as separate operations. */
mop = finalize_memop_asimd(s, a->sz);
op_addr_ldstpair_pre(s, a, &clean_addr, &dirty_addr, offset, false, mop);
do_fp_ld(s, a->rt, clean_addr, mop);
tcg_gen_addi_i64(clean_addr, clean_addr, 1 << a->sz);
do_fp_ld(s, a->rt2, clean_addr, mop);
op_addr_ldstpair_post(s, a, dirty_addr, offset);
return true;
}
static bool trans_STGP(DisasContext *s, arg_ldstpair *a)
{
TCGv_i64 clean_addr, dirty_addr, tcg_rt, tcg_rt2;
uint64_t offset = a->imm << LOG2_TAG_GRANULE;
MemOp mop;
TCGv_i128 tmp;
/* STGP only comes in one size. */
tcg_debug_assert(a->sz == MO_64);
if (!dc_isar_feature(aa64_mte_insn_reg, s)) {
return false;
}
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
dirty_addr = read_cpu_reg_sp(s, a->rn, 1);
if (!a->p) {
tcg_gen_addi_i64(dirty_addr, dirty_addr, offset);
}
clean_addr = clean_data_tbi(s, dirty_addr);
tcg_rt = cpu_reg(s, a->rt);
tcg_rt2 = cpu_reg(s, a->rt2);
/*
* STGP is defined as two 8-byte memory operations, aligned to TAG_GRANULE,
* and one tag operation. We implement it as one single aligned 16-byte
* memory operation for convenience. Note that the alignment ensures
* MO_ATOM_IFALIGN_PAIR produces 8-byte atomicity for the memory store.
*/
mop = finalize_memop_atom(s, MO_128 | MO_ALIGN, MO_ATOM_IFALIGN_PAIR);
tmp = tcg_temp_new_i128();
if (s->be_data == MO_LE) {
tcg_gen_concat_i64_i128(tmp, tcg_rt, tcg_rt2);
} else {
tcg_gen_concat_i64_i128(tmp, tcg_rt2, tcg_rt);
}
tcg_gen_qemu_st_i128(tmp, clean_addr, get_mem_index(s), mop);
/* Perform the tag store, if tag access enabled. */
if (s->ata[0]) {
if (tb_cflags(s->base.tb) & CF_PARALLEL) {
gen_helper_stg_parallel(tcg_env, dirty_addr, dirty_addr);
} else {
gen_helper_stg(tcg_env, dirty_addr, dirty_addr);
}
}
op_addr_ldstpair_post(s, a, dirty_addr, offset);
return true;
}
static void op_addr_ldst_imm_pre(DisasContext *s, arg_ldst_imm *a,
TCGv_i64 *clean_addr, TCGv_i64 *dirty_addr,
uint64_t offset, bool is_store, MemOp mop)
{
int memidx;
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
*dirty_addr = read_cpu_reg_sp(s, a->rn, 1);
if (!a->p) {
tcg_gen_addi_i64(*dirty_addr, *dirty_addr, offset);
}
memidx = get_a64_user_mem_index(s, a->unpriv);
*clean_addr = gen_mte_check1_mmuidx(s, *dirty_addr, is_store,
a->w || a->rn != 31,
mop, a->unpriv, memidx);
}
static void op_addr_ldst_imm_post(DisasContext *s, arg_ldst_imm *a,
TCGv_i64 dirty_addr, uint64_t offset)
{
if (a->w) {
if (a->p) {
tcg_gen_addi_i64(dirty_addr, dirty_addr, offset);
}
tcg_gen_mov_i64(cpu_reg_sp(s, a->rn), dirty_addr);
}
}
static bool trans_STR_i(DisasContext *s, arg_ldst_imm *a)
{
bool iss_sf, iss_valid = !a->w;
TCGv_i64 clean_addr, dirty_addr, tcg_rt;
int memidx = get_a64_user_mem_index(s, a->unpriv);
MemOp mop = finalize_memop(s, a->sz + a->sign * MO_SIGN);
op_addr_ldst_imm_pre(s, a, &clean_addr, &dirty_addr, a->imm, true, mop);
tcg_rt = cpu_reg(s, a->rt);
iss_sf = ldst_iss_sf(a->sz, a->sign, a->ext);
do_gpr_st_memidx(s, tcg_rt, clean_addr, mop, memidx,
iss_valid, a->rt, iss_sf, false);
op_addr_ldst_imm_post(s, a, dirty_addr, a->imm);
return true;
}
static bool trans_LDR_i(DisasContext *s, arg_ldst_imm *a)
{
bool iss_sf, iss_valid = !a->w;
TCGv_i64 clean_addr, dirty_addr, tcg_rt;
int memidx = get_a64_user_mem_index(s, a->unpriv);
MemOp mop = finalize_memop(s, a->sz + a->sign * MO_SIGN);
op_addr_ldst_imm_pre(s, a, &clean_addr, &dirty_addr, a->imm, false, mop);
tcg_rt = cpu_reg(s, a->rt);
iss_sf = ldst_iss_sf(a->sz, a->sign, a->ext);
do_gpr_ld_memidx(s, tcg_rt, clean_addr, mop,
a->ext, memidx, iss_valid, a->rt, iss_sf, false);
op_addr_ldst_imm_post(s, a, dirty_addr, a->imm);
return true;
}
static bool trans_STR_v_i(DisasContext *s, arg_ldst_imm *a)
{
TCGv_i64 clean_addr, dirty_addr;
MemOp mop;
if (!fp_access_check(s)) {
return true;
}
mop = finalize_memop_asimd(s, a->sz);
op_addr_ldst_imm_pre(s, a, &clean_addr, &dirty_addr, a->imm, true, mop);
do_fp_st(s, a->rt, clean_addr, mop);
op_addr_ldst_imm_post(s, a, dirty_addr, a->imm);
return true;
}
static bool trans_LDR_v_i(DisasContext *s, arg_ldst_imm *a)
{
TCGv_i64 clean_addr, dirty_addr;
MemOp mop;
if (!fp_access_check(s)) {
return true;
}
mop = finalize_memop_asimd(s, a->sz);
op_addr_ldst_imm_pre(s, a, &clean_addr, &dirty_addr, a->imm, false, mop);
do_fp_ld(s, a->rt, clean_addr, mop);
op_addr_ldst_imm_post(s, a, dirty_addr, a->imm);
return true;
}
static void op_addr_ldst_pre(DisasContext *s, arg_ldst *a,
TCGv_i64 *clean_addr, TCGv_i64 *dirty_addr,
bool is_store, MemOp memop)
{
TCGv_i64 tcg_rm;
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
*dirty_addr = read_cpu_reg_sp(s, a->rn, 1);
tcg_rm = read_cpu_reg(s, a->rm, 1);
ext_and_shift_reg(tcg_rm, tcg_rm, a->opt, a->s ? a->sz : 0);
tcg_gen_add_i64(*dirty_addr, *dirty_addr, tcg_rm);
*clean_addr = gen_mte_check1(s, *dirty_addr, is_store, true, memop);
}
static bool trans_LDR(DisasContext *s, arg_ldst *a)
{
TCGv_i64 clean_addr, dirty_addr, tcg_rt;
bool iss_sf = ldst_iss_sf(a->sz, a->sign, a->ext);
MemOp memop;
if (extract32(a->opt, 1, 1) == 0) {
return false;
}
memop = finalize_memop(s, a->sz + a->sign * MO_SIGN);
op_addr_ldst_pre(s, a, &clean_addr, &dirty_addr, false, memop);
tcg_rt = cpu_reg(s, a->rt);
do_gpr_ld(s, tcg_rt, clean_addr, memop,
a->ext, true, a->rt, iss_sf, false);
return true;
}
static bool trans_STR(DisasContext *s, arg_ldst *a)
{
TCGv_i64 clean_addr, dirty_addr, tcg_rt;
bool iss_sf = ldst_iss_sf(a->sz, a->sign, a->ext);
MemOp memop;
if (extract32(a->opt, 1, 1) == 0) {
return false;
}
memop = finalize_memop(s, a->sz);
op_addr_ldst_pre(s, a, &clean_addr, &dirty_addr, true, memop);
tcg_rt = cpu_reg(s, a->rt);
do_gpr_st(s, tcg_rt, clean_addr, memop, true, a->rt, iss_sf, false);
return true;
}
static bool trans_LDR_v(DisasContext *s, arg_ldst *a)
{
TCGv_i64 clean_addr, dirty_addr;
MemOp memop;
if (extract32(a->opt, 1, 1) == 0) {
return false;
}
if (!fp_access_check(s)) {
return true;
}
memop = finalize_memop_asimd(s, a->sz);
op_addr_ldst_pre(s, a, &clean_addr, &dirty_addr, false, memop);
do_fp_ld(s, a->rt, clean_addr, memop);
return true;
}
static bool trans_STR_v(DisasContext *s, arg_ldst *a)
{
TCGv_i64 clean_addr, dirty_addr;
MemOp memop;
if (extract32(a->opt, 1, 1) == 0) {
return false;
}
if (!fp_access_check(s)) {
return true;
}
memop = finalize_memop_asimd(s, a->sz);
op_addr_ldst_pre(s, a, &clean_addr, &dirty_addr, true, memop);
do_fp_st(s, a->rt, clean_addr, memop);
return true;
}
static bool do_atomic_ld(DisasContext *s, arg_atomic *a, AtomicThreeOpFn *fn,
int sign, bool invert)
{
MemOp mop = a->sz | sign;
TCGv_i64 clean_addr, tcg_rs, tcg_rt;
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
mop = check_atomic_align(s, a->rn, mop);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, a->rn), false,
a->rn != 31, mop);
tcg_rs = read_cpu_reg(s, a->rs, true);
tcg_rt = cpu_reg(s, a->rt);
if (invert) {
tcg_gen_not_i64(tcg_rs, tcg_rs);
}
/*
* The tcg atomic primitives are all full barriers. Therefore we
* can ignore the Acquire and Release bits of this instruction.
*/
fn(tcg_rt, clean_addr, tcg_rs, get_mem_index(s), mop);
if (mop & MO_SIGN) {
switch (a->sz) {
case MO_8:
tcg_gen_ext8u_i64(tcg_rt, tcg_rt);
break;
case MO_16:
tcg_gen_ext16u_i64(tcg_rt, tcg_rt);
break;
case MO_32:
tcg_gen_ext32u_i64(tcg_rt, tcg_rt);
break;
case MO_64:
break;
default:
g_assert_not_reached();
}
}
return true;
}
TRANS_FEAT(LDADD, aa64_atomics, do_atomic_ld, a, tcg_gen_atomic_fetch_add_i64, 0, false)
TRANS_FEAT(LDCLR, aa64_atomics, do_atomic_ld, a, tcg_gen_atomic_fetch_and_i64, 0, true)
TRANS_FEAT(LDEOR, aa64_atomics, do_atomic_ld, a, tcg_gen_atomic_fetch_xor_i64, 0, false)
TRANS_FEAT(LDSET, aa64_atomics, do_atomic_ld, a, tcg_gen_atomic_fetch_or_i64, 0, false)
TRANS_FEAT(LDSMAX, aa64_atomics, do_atomic_ld, a, tcg_gen_atomic_fetch_smax_i64, MO_SIGN, false)
TRANS_FEAT(LDSMIN, aa64_atomics, do_atomic_ld, a, tcg_gen_atomic_fetch_smin_i64, MO_SIGN, false)
TRANS_FEAT(LDUMAX, aa64_atomics, do_atomic_ld, a, tcg_gen_atomic_fetch_umax_i64, 0, false)
TRANS_FEAT(LDUMIN, aa64_atomics, do_atomic_ld, a, tcg_gen_atomic_fetch_umin_i64, 0, false)
TRANS_FEAT(SWP, aa64_atomics, do_atomic_ld, a, tcg_gen_atomic_xchg_i64, 0, false)
static bool trans_LDAPR(DisasContext *s, arg_LDAPR *a)
{
bool iss_sf = ldst_iss_sf(a->sz, false, false);
TCGv_i64 clean_addr;
MemOp mop;
if (!dc_isar_feature(aa64_atomics, s) ||
!dc_isar_feature(aa64_rcpc_8_3, s)) {
return false;
}
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
mop = check_atomic_align(s, a->rn, a->sz);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, a->rn), false,
a->rn != 31, mop);
/*
* LDAPR* are a special case because they are a simple load, not a
* fetch-and-do-something op.
* The architectural consistency requirements here are weaker than
* full load-acquire (we only need "load-acquire processor consistent"),
* but we choose to implement them as full LDAQ.
*/
do_gpr_ld(s, cpu_reg(s, a->rt), clean_addr, mop, false,
true, a->rt, iss_sf, true);
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
return true;
}
static bool trans_LDRA(DisasContext *s, arg_LDRA *a)
{
TCGv_i64 clean_addr, dirty_addr, tcg_rt;
MemOp memop;
/* Load with pointer authentication */
if (!dc_isar_feature(aa64_pauth, s)) {
return false;
}
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
dirty_addr = read_cpu_reg_sp(s, a->rn, 1);
if (s->pauth_active) {
if (!a->m) {
gen_helper_autda_combined(dirty_addr, tcg_env, dirty_addr,
tcg_constant_i64(0));
} else {
gen_helper_autdb_combined(dirty_addr, tcg_env, dirty_addr,
tcg_constant_i64(0));
}
}
tcg_gen_addi_i64(dirty_addr, dirty_addr, a->imm);
memop = finalize_memop(s, MO_64);
/* Note that "clean" and "dirty" here refer to TBI not PAC. */
clean_addr = gen_mte_check1(s, dirty_addr, false,
a->w || a->rn != 31, memop);
tcg_rt = cpu_reg(s, a->rt);
do_gpr_ld(s, tcg_rt, clean_addr, memop,
/* extend */ false, /* iss_valid */ !a->w,
/* iss_srt */ a->rt, /* iss_sf */ true, /* iss_ar */ false);
if (a->w) {
tcg_gen_mov_i64(cpu_reg_sp(s, a->rn), dirty_addr);
}
return true;
}
static bool trans_LDAPR_i(DisasContext *s, arg_ldapr_stlr_i *a)
{
TCGv_i64 clean_addr, dirty_addr;
MemOp mop = a->sz | (a->sign ? MO_SIGN : 0);
bool iss_sf = ldst_iss_sf(a->sz, a->sign, a->ext);
if (!dc_isar_feature(aa64_rcpc_8_4, s)) {
return false;
}
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
mop = check_ordered_align(s, a->rn, a->imm, false, mop);
dirty_addr = read_cpu_reg_sp(s, a->rn, 1);
tcg_gen_addi_i64(dirty_addr, dirty_addr, a->imm);
clean_addr = clean_data_tbi(s, dirty_addr);
/*
* Load-AcquirePC semantics; we implement as the slightly more
* restrictive Load-Acquire.
*/
do_gpr_ld(s, cpu_reg(s, a->rt), clean_addr, mop, a->ext, true,
a->rt, iss_sf, true);
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
return true;
}
static bool trans_STLR_i(DisasContext *s, arg_ldapr_stlr_i *a)
{
TCGv_i64 clean_addr, dirty_addr;
MemOp mop = a->sz;
bool iss_sf = ldst_iss_sf(a->sz, a->sign, a->ext);
if (!dc_isar_feature(aa64_rcpc_8_4, s)) {
return false;
}
/* TODO: ARMv8.4-LSE SCTLR.nAA */
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
mop = check_ordered_align(s, a->rn, a->imm, true, mop);
dirty_addr = read_cpu_reg_sp(s, a->rn, 1);
tcg_gen_addi_i64(dirty_addr, dirty_addr, a->imm);
clean_addr = clean_data_tbi(s, dirty_addr);
/* Store-Release semantics */
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL);
do_gpr_st(s, cpu_reg(s, a->rt), clean_addr, mop, true, a->rt, iss_sf, true);
return true;
}
static bool trans_LD_mult(DisasContext *s, arg_ldst_mult *a)
{
TCGv_i64 clean_addr, tcg_rn, tcg_ebytes;
MemOp endian, align, mop;
int total; /* total bytes */
int elements; /* elements per vector */
int r;
int size = a->sz;
if (!a->p && a->rm != 0) {
/* For non-postindexed accesses the Rm field must be 0 */
return false;
}
if (size == 3 && !a->q && a->selem != 1) {
return false;
}
if (!fp_access_check(s)) {
return true;
}
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
/* For our purposes, bytes are always little-endian. */
endian = s->be_data;
if (size == 0) {
endian = MO_LE;
}
total = a->rpt * a->selem * (a->q ? 16 : 8);
tcg_rn = cpu_reg_sp(s, a->rn);
/*
* Issue the MTE check vs the logical repeat count, before we
* promote consecutive little-endian elements below.
*/
clean_addr = gen_mte_checkN(s, tcg_rn, false, a->p || a->rn != 31, total,
finalize_memop_asimd(s, size));
/*
* Consecutive little-endian elements from a single register
* can be promoted to a larger little-endian operation.
*/
align = MO_ALIGN;
if (a->selem == 1 && endian == MO_LE) {
align = pow2_align(size);
size = 3;
}
if (!s->align_mem) {
align = 0;
}
mop = endian | size | align;
elements = (a->q ? 16 : 8) >> size;
tcg_ebytes = tcg_constant_i64(1 << size);
for (r = 0; r < a->rpt; r++) {
int e;
for (e = 0; e < elements; e++) {
int xs;
for (xs = 0; xs < a->selem; xs++) {
int tt = (a->rt + r + xs) % 32;
do_vec_ld(s, tt, e, clean_addr, mop);
tcg_gen_add_i64(clean_addr, clean_addr, tcg_ebytes);
}
}
}
/*
* For non-quad operations, setting a slice of the low 64 bits of
* the register clears the high 64 bits (in the ARM ARM pseudocode
* this is implicit in the fact that 'rval' is a 64 bit wide
* variable). For quad operations, we might still need to zero
* the high bits of SVE.
*/
for (r = 0; r < a->rpt * a->selem; r++) {
int tt = (a->rt + r) % 32;
clear_vec_high(s, a->q, tt);
}
if (a->p) {
if (a->rm == 31) {
tcg_gen_addi_i64(tcg_rn, tcg_rn, total);
} else {
tcg_gen_add_i64(tcg_rn, tcg_rn, cpu_reg(s, a->rm));
}
}
return true;
}
static bool trans_ST_mult(DisasContext *s, arg_ldst_mult *a)
{
TCGv_i64 clean_addr, tcg_rn, tcg_ebytes;
MemOp endian, align, mop;
int total; /* total bytes */
int elements; /* elements per vector */
int r;
int size = a->sz;
if (!a->p && a->rm != 0) {
/* For non-postindexed accesses the Rm field must be 0 */
return false;
}
if (size == 3 && !a->q && a->selem != 1) {
return false;
}
if (!fp_access_check(s)) {
return true;
}
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
/* For our purposes, bytes are always little-endian. */
endian = s->be_data;
if (size == 0) {
endian = MO_LE;
}
total = a->rpt * a->selem * (a->q ? 16 : 8);
tcg_rn = cpu_reg_sp(s, a->rn);
/*
* Issue the MTE check vs the logical repeat count, before we
* promote consecutive little-endian elements below.
*/
clean_addr = gen_mte_checkN(s, tcg_rn, true, a->p || a->rn != 31, total,
finalize_memop_asimd(s, size));
/*
* Consecutive little-endian elements from a single register
* can be promoted to a larger little-endian operation.
*/
align = MO_ALIGN;
if (a->selem == 1 && endian == MO_LE) {
align = pow2_align(size);
size = 3;
}
if (!s->align_mem) {
align = 0;
}
mop = endian | size | align;
elements = (a->q ? 16 : 8) >> size;
tcg_ebytes = tcg_constant_i64(1 << size);
for (r = 0; r < a->rpt; r++) {
int e;
for (e = 0; e < elements; e++) {
int xs;
for (xs = 0; xs < a->selem; xs++) {
int tt = (a->rt + r + xs) % 32;
do_vec_st(s, tt, e, clean_addr, mop);
tcg_gen_add_i64(clean_addr, clean_addr, tcg_ebytes);
}
}
}
if (a->p) {
if (a->rm == 31) {
tcg_gen_addi_i64(tcg_rn, tcg_rn, total);
} else {
tcg_gen_add_i64(tcg_rn, tcg_rn, cpu_reg(s, a->rm));
}
}
return true;
}
static bool trans_ST_single(DisasContext *s, arg_ldst_single *a)
{
int xs, total, rt;
TCGv_i64 clean_addr, tcg_rn, tcg_ebytes;
MemOp mop;
if (!a->p && a->rm != 0) {
return false;
}
if (!fp_access_check(s)) {
return true;
}
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
total = a->selem << a->scale;
tcg_rn = cpu_reg_sp(s, a->rn);
mop = finalize_memop_asimd(s, a->scale);
clean_addr = gen_mte_checkN(s, tcg_rn, true, a->p || a->rn != 31,
total, mop);
tcg_ebytes = tcg_constant_i64(1 << a->scale);
for (xs = 0, rt = a->rt; xs < a->selem; xs++, rt = (rt + 1) % 32) {
do_vec_st(s, rt, a->index, clean_addr, mop);
tcg_gen_add_i64(clean_addr, clean_addr, tcg_ebytes);
}
if (a->p) {
if (a->rm == 31) {
tcg_gen_addi_i64(tcg_rn, tcg_rn, total);
} else {
tcg_gen_add_i64(tcg_rn, tcg_rn, cpu_reg(s, a->rm));
}
}
return true;
}
static bool trans_LD_single(DisasContext *s, arg_ldst_single *a)
{
int xs, total, rt;
TCGv_i64 clean_addr, tcg_rn, tcg_ebytes;
MemOp mop;
if (!a->p && a->rm != 0) {
return false;
}
if (!fp_access_check(s)) {
return true;
}
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
total = a->selem << a->scale;
tcg_rn = cpu_reg_sp(s, a->rn);
mop = finalize_memop_asimd(s, a->scale);
clean_addr = gen_mte_checkN(s, tcg_rn, false, a->p || a->rn != 31,
total, mop);
tcg_ebytes = tcg_constant_i64(1 << a->scale);
for (xs = 0, rt = a->rt; xs < a->selem; xs++, rt = (rt + 1) % 32) {
do_vec_ld(s, rt, a->index, clean_addr, mop);
tcg_gen_add_i64(clean_addr, clean_addr, tcg_ebytes);
}
if (a->p) {
if (a->rm == 31) {
tcg_gen_addi_i64(tcg_rn, tcg_rn, total);
} else {
tcg_gen_add_i64(tcg_rn, tcg_rn, cpu_reg(s, a->rm));
}
}
return true;
}
static bool trans_LD_single_repl(DisasContext *s, arg_LD_single_repl *a)
{
int xs, total, rt;
TCGv_i64 clean_addr, tcg_rn, tcg_ebytes;
MemOp mop;
if (!a->p && a->rm != 0) {
return false;
}
if (!fp_access_check(s)) {
return true;
}
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
total = a->selem << a->scale;
tcg_rn = cpu_reg_sp(s, a->rn);
mop = finalize_memop_asimd(s, a->scale);
clean_addr = gen_mte_checkN(s, tcg_rn, false, a->p || a->rn != 31,
total, mop);
tcg_ebytes = tcg_constant_i64(1 << a->scale);
for (xs = 0, rt = a->rt; xs < a->selem; xs++, rt = (rt + 1) % 32) {
/* Load and replicate to all elements */
TCGv_i64 tcg_tmp = tcg_temp_new_i64();
tcg_gen_qemu_ld_i64(tcg_tmp, clean_addr, get_mem_index(s), mop);
tcg_gen_gvec_dup_i64(a->scale, vec_full_reg_offset(s, rt),
(a->q + 1) * 8, vec_full_reg_size(s), tcg_tmp);
tcg_gen_add_i64(clean_addr, clean_addr, tcg_ebytes);
}
if (a->p) {
if (a->rm == 31) {
tcg_gen_addi_i64(tcg_rn, tcg_rn, total);
} else {
tcg_gen_add_i64(tcg_rn, tcg_rn, cpu_reg(s, a->rm));
}
}
return true;
}
static bool trans_STZGM(DisasContext *s, arg_ldst_tag *a)
{
TCGv_i64 addr, clean_addr, tcg_rt;
int size = 4 << s->dcz_blocksize;
if (!dc_isar_feature(aa64_mte, s)) {
return false;
}
if (s->current_el == 0) {
return false;
}
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
addr = read_cpu_reg_sp(s, a->rn, true);
tcg_gen_addi_i64(addr, addr, a->imm);
tcg_rt = cpu_reg(s, a->rt);
if (s->ata[0]) {
gen_helper_stzgm_tags(tcg_env, addr, tcg_rt);
}
/*
* The non-tags portion of STZGM is mostly like DC_ZVA,
* except the alignment happens before the access.
*/
clean_addr = clean_data_tbi(s, addr);
tcg_gen_andi_i64(clean_addr, clean_addr, -size);
gen_helper_dc_zva(tcg_env, clean_addr);
return true;
}
static bool trans_STGM(DisasContext *s, arg_ldst_tag *a)
{
TCGv_i64 addr, clean_addr, tcg_rt;
if (!dc_isar_feature(aa64_mte, s)) {
return false;
}
if (s->current_el == 0) {
return false;
}
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
addr = read_cpu_reg_sp(s, a->rn, true);
tcg_gen_addi_i64(addr, addr, a->imm);
tcg_rt = cpu_reg(s, a->rt);
if (s->ata[0]) {
gen_helper_stgm(tcg_env, addr, tcg_rt);
} else {
MMUAccessType acc = MMU_DATA_STORE;
int size = 4 << s->gm_blocksize;
clean_addr = clean_data_tbi(s, addr);
tcg_gen_andi_i64(clean_addr, clean_addr, -size);
gen_probe_access(s, clean_addr, acc, size);
}
return true;
}
static bool trans_LDGM(DisasContext *s, arg_ldst_tag *a)
{
TCGv_i64 addr, clean_addr, tcg_rt;
if (!dc_isar_feature(aa64_mte, s)) {
return false;
}
if (s->current_el == 0) {
return false;
}
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
addr = read_cpu_reg_sp(s, a->rn, true);
tcg_gen_addi_i64(addr, addr, a->imm);
tcg_rt = cpu_reg(s, a->rt);
if (s->ata[0]) {
gen_helper_ldgm(tcg_rt, tcg_env, addr);
} else {
MMUAccessType acc = MMU_DATA_LOAD;
int size = 4 << s->gm_blocksize;
clean_addr = clean_data_tbi(s, addr);
tcg_gen_andi_i64(clean_addr, clean_addr, -size);
gen_probe_access(s, clean_addr, acc, size);
/* The result tags are zeros. */
tcg_gen_movi_i64(tcg_rt, 0);
}
return true;
}
static bool trans_LDG(DisasContext *s, arg_ldst_tag *a)
{
TCGv_i64 addr, clean_addr, tcg_rt;
if (!dc_isar_feature(aa64_mte_insn_reg, s)) {
return false;
}
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
addr = read_cpu_reg_sp(s, a->rn, true);
if (!a->p) {
/* pre-index or signed offset */
tcg_gen_addi_i64(addr, addr, a->imm);
}
tcg_gen_andi_i64(addr, addr, -TAG_GRANULE);
tcg_rt = cpu_reg(s, a->rt);
if (s->ata[0]) {
gen_helper_ldg(tcg_rt, tcg_env, addr, tcg_rt);
} else {
/*
* Tag access disabled: we must check for aborts on the load
* load from [rn+offset], and then insert a 0 tag into rt.
*/
clean_addr = clean_data_tbi(s, addr);
gen_probe_access(s, clean_addr, MMU_DATA_LOAD, MO_8);
gen_address_with_allocation_tag0(tcg_rt, tcg_rt);
}
if (a->w) {
/* pre-index or post-index */
if (a->p) {
/* post-index */
tcg_gen_addi_i64(addr, addr, a->imm);
}
tcg_gen_mov_i64(cpu_reg_sp(s, a->rn), addr);
}
return true;
}
static bool do_STG(DisasContext *s, arg_ldst_tag *a, bool is_zero, bool is_pair)
{
TCGv_i64 addr, tcg_rt;
if (a->rn == 31) {
gen_check_sp_alignment(s);
}
addr = read_cpu_reg_sp(s, a->rn, true);
if (!a->p) {
/* pre-index or signed offset */
tcg_gen_addi_i64(addr, addr, a->imm);
}
tcg_rt = cpu_reg_sp(s, a->rt);
if (!s->ata[0]) {
/*
* For STG and ST2G, we need to check alignment and probe memory.
* TODO: For STZG and STZ2G, we could rely on the stores below,
* at least for system mode; user-only won't enforce alignment.
*/
if (is_pair) {
gen_helper_st2g_stub(tcg_env, addr);
} else {
gen_helper_stg_stub(tcg_env, addr);
}
} else if (tb_cflags(s->base.tb) & CF_PARALLEL) {
if (is_pair) {
gen_helper_st2g_parallel(tcg_env, addr, tcg_rt);
} else {
gen_helper_stg_parallel(tcg_env, addr, tcg_rt);
}
} else {
if (is_pair) {
gen_helper_st2g(tcg_env, addr, tcg_rt);
} else {
gen_helper_stg(tcg_env, addr, tcg_rt);
}
}
if (is_zero) {
TCGv_i64 clean_addr = clean_data_tbi(s, addr);
TCGv_i64 zero64 = tcg_constant_i64(0);
TCGv_i128 zero128 = tcg_temp_new_i128();
int mem_index = get_mem_index(s);
MemOp mop = finalize_memop(s, MO_128 | MO_ALIGN);
tcg_gen_concat_i64_i128(zero128, zero64, zero64);
/* This is 1 or 2 atomic 16-byte operations. */
tcg_gen_qemu_st_i128(zero128, clean_addr, mem_index, mop);
if (is_pair) {
tcg_gen_addi_i64(clean_addr, clean_addr, 16);
tcg_gen_qemu_st_i128(zero128, clean_addr, mem_index, mop);
}
}
if (a->w) {
/* pre-index or post-index */
if (a->p) {
/* post-index */
tcg_gen_addi_i64(addr, addr, a->imm);
}
tcg_gen_mov_i64(cpu_reg_sp(s, a->rn), addr);
}
return true;
}
TRANS_FEAT(STG, aa64_mte_insn_reg, do_STG, a, false, false)
TRANS_FEAT(STZG, aa64_mte_insn_reg, do_STG, a, true, false)
TRANS_FEAT(ST2G, aa64_mte_insn_reg, do_STG, a, false, true)
TRANS_FEAT(STZ2G, aa64_mte_insn_reg, do_STG, a, true, true)
typedef void SetFn(TCGv_env, TCGv_i32, TCGv_i32);
static bool do_SET(DisasContext *s, arg_set *a, bool is_epilogue,
bool is_setg, SetFn fn)
{
int memidx;
uint32_t syndrome, desc = 0;
if (is_setg && !dc_isar_feature(aa64_mte, s)) {
return false;
}
/*
* UNPREDICTABLE cases: we choose to UNDEF, which allows
* us to pull this check before the CheckMOPSEnabled() test
* (which we do in the helper function)
*/
if (a->rs == a->rn || a->rs == a->rd || a->rn == a->rd ||
a->rd == 31 || a->rn == 31) {
return false;
}
memidx = get_a64_user_mem_index(s, a->unpriv);
/*
* We pass option_a == true, matching our implementation;
* we pass wrong_option == false: helper function may set that bit.
*/
syndrome = syn_mop(true, is_setg, (a->nontemp << 1) | a->unpriv,
is_epilogue, false, true, a->rd, a->rs, a->rn);
if (is_setg ? s->ata[a->unpriv] : s->mte_active[a->unpriv]) {
/* We may need to do MTE tag checking, so assemble the descriptor */
desc = FIELD_DP32(desc, MTEDESC, TBI, s->tbid);
desc = FIELD_DP32(desc, MTEDESC, TCMA, s->tcma);
desc = FIELD_DP32(desc, MTEDESC, WRITE, true);
/* SIZEM1 and ALIGN we leave 0 (byte write) */
}
/* The helper function always needs the memidx even with MTE disabled */
desc = FIELD_DP32(desc, MTEDESC, MIDX, memidx);
/*
* The helper needs the register numbers, but since they're in
* the syndrome anyway, we let it extract them from there rather
* than passing in an extra three integer arguments.
*/
fn(tcg_env, tcg_constant_i32(syndrome), tcg_constant_i32(desc));
return true;
}
TRANS_FEAT(SETP, aa64_mops, do_SET, a, false, false, gen_helper_setp)
TRANS_FEAT(SETM, aa64_mops, do_SET, a, false, false, gen_helper_setm)
TRANS_FEAT(SETE, aa64_mops, do_SET, a, true, false, gen_helper_sete)
TRANS_FEAT(SETGP, aa64_mops, do_SET, a, false, true, gen_helper_setgp)
TRANS_FEAT(SETGM, aa64_mops, do_SET, a, false, true, gen_helper_setgm)
TRANS_FEAT(SETGE, aa64_mops, do_SET, a, true, true, gen_helper_setge)
typedef void CpyFn(TCGv_env, TCGv_i32, TCGv_i32, TCGv_i32);
static bool do_CPY(DisasContext *s, arg_cpy *a, bool is_epilogue, CpyFn fn)
{
int rmemidx, wmemidx;
uint32_t syndrome, rdesc = 0, wdesc = 0;
bool wunpriv = extract32(a->options, 0, 1);
bool runpriv = extract32(a->options, 1, 1);
/*
* UNPREDICTABLE cases: we choose to UNDEF, which allows
* us to pull this check before the CheckMOPSEnabled() test
* (which we do in the helper function)
*/
if (a->rs == a->rn || a->rs == a->rd || a->rn == a->rd ||
a->rd == 31 || a->rs == 31 || a->rn == 31) {
return false;
}
rmemidx = get_a64_user_mem_index(s, runpriv);
wmemidx = get_a64_user_mem_index(s, wunpriv);
/*
* We pass option_a == true, matching our implementation;
* we pass wrong_option == false: helper function may set that bit.
*/
syndrome = syn_mop(false, false, a->options, is_epilogue,
false, true, a->rd, a->rs, a->rn);
/* If we need to do MTE tag checking, assemble the descriptors */
if (s->mte_active[runpriv]) {
rdesc = FIELD_DP32(rdesc, MTEDESC, TBI, s->tbid);
rdesc = FIELD_DP32(rdesc, MTEDESC, TCMA, s->tcma);
}
if (s->mte_active[wunpriv]) {
wdesc = FIELD_DP32(wdesc, MTEDESC, TBI, s->tbid);
wdesc = FIELD_DP32(wdesc, MTEDESC, TCMA, s->tcma);
wdesc = FIELD_DP32(wdesc, MTEDESC, WRITE, true);
}
/* The helper function needs these parts of the descriptor regardless */
rdesc = FIELD_DP32(rdesc, MTEDESC, MIDX, rmemidx);
wdesc = FIELD_DP32(wdesc, MTEDESC, MIDX, wmemidx);
/*
* The helper needs the register numbers, but since they're in
* the syndrome anyway, we let it extract them from there rather
* than passing in an extra three integer arguments.
*/
fn(tcg_env, tcg_constant_i32(syndrome), tcg_constant_i32(wdesc),
tcg_constant_i32(rdesc));
return true;
}
TRANS_FEAT(CPYP, aa64_mops, do_CPY, a, false, gen_helper_cpyp)
TRANS_FEAT(CPYM, aa64_mops, do_CPY, a, false, gen_helper_cpym)
TRANS_FEAT(CPYE, aa64_mops, do_CPY, a, true, gen_helper_cpye)
TRANS_FEAT(CPYFP, aa64_mops, do_CPY, a, false, gen_helper_cpyfp)
TRANS_FEAT(CPYFM, aa64_mops, do_CPY, a, false, gen_helper_cpyfm)
TRANS_FEAT(CPYFE, aa64_mops, do_CPY, a, true, gen_helper_cpyfe)
typedef void ArithTwoOp(TCGv_i64, TCGv_i64, TCGv_i64);
static bool gen_rri(DisasContext *s, arg_rri_sf *a,
bool rd_sp, bool rn_sp, ArithTwoOp *fn)
{
TCGv_i64 tcg_rn = rn_sp ? cpu_reg_sp(s, a->rn) : cpu_reg(s, a->rn);
TCGv_i64 tcg_rd = rd_sp ? cpu_reg_sp(s, a->rd) : cpu_reg(s, a->rd);
TCGv_i64 tcg_imm = tcg_constant_i64(a->imm);
fn(tcg_rd, tcg_rn, tcg_imm);
if (!a->sf) {
tcg_gen_ext32u_i64(tcg_rd, tcg_rd);
}
return true;
}
/*
* PC-rel. addressing
*/
static bool trans_ADR(DisasContext *s, arg_ri *a)
{
gen_pc_plus_diff(s, cpu_reg(s, a->rd), a->imm);
return true;
}
static bool trans_ADRP(DisasContext *s, arg_ri *a)
{
int64_t offset = (int64_t)a->imm << 12;
/* The page offset is ok for CF_PCREL. */
offset -= s->pc_curr & 0xfff;
gen_pc_plus_diff(s, cpu_reg(s, a->rd), offset);
return true;
}
/*
* Add/subtract (immediate)
*/
TRANS(ADD_i, gen_rri, a, 1, 1, tcg_gen_add_i64)
TRANS(SUB_i, gen_rri, a, 1, 1, tcg_gen_sub_i64)
TRANS(ADDS_i, gen_rri, a, 0, 1, a->sf ? gen_add64_CC : gen_add32_CC)
TRANS(SUBS_i, gen_rri, a, 0, 1, a->sf ? gen_sub64_CC : gen_sub32_CC)
/*
* Add/subtract (immediate, with tags)
*/
static bool gen_add_sub_imm_with_tags(DisasContext *s, arg_rri_tag *a,
bool sub_op)
{
TCGv_i64 tcg_rn, tcg_rd;
int imm;
imm = a->uimm6 << LOG2_TAG_GRANULE;
if (sub_op) {
imm = -imm;
}
tcg_rn = cpu_reg_sp(s, a->rn);
tcg_rd = cpu_reg_sp(s, a->rd);
if (s->ata[0]) {
gen_helper_addsubg(tcg_rd, tcg_env, tcg_rn,
tcg_constant_i32(imm),
tcg_constant_i32(a->uimm4));
} else {
tcg_gen_addi_i64(tcg_rd, tcg_rn, imm);
gen_address_with_allocation_tag0(tcg_rd, tcg_rd);
}
return true;
}
TRANS_FEAT(ADDG_i, aa64_mte_insn_reg, gen_add_sub_imm_with_tags, a, false)
TRANS_FEAT(SUBG_i, aa64_mte_insn_reg, gen_add_sub_imm_with_tags, a, true)
/* The input should be a value in the bottom e bits (with higher
* bits zero); returns that value replicated into every element
* of size e in a 64 bit integer.
*/
static uint64_t bitfield_replicate(uint64_t mask, unsigned int e)
{
assert(e != 0);
while (e < 64) {
mask |= mask << e;
e *= 2;
}
return mask;
}
/*
* Logical (immediate)
*/
/*
* Simplified variant of pseudocode DecodeBitMasks() for the case where we
* only require the wmask. Returns false if the imms/immr/immn are a reserved
* value (ie should cause a guest UNDEF exception), and true if they are
* valid, in which case the decoded bit pattern is written to result.
*/
bool logic_imm_decode_wmask(uint64_t *result, unsigned int immn,
unsigned int imms, unsigned int immr)
{
uint64_t mask;
unsigned e, levels, s, r;
int len;
assert(immn < 2 && imms < 64 && immr < 64);
/* The bit patterns we create here are 64 bit patterns which
* are vectors of identical elements of size e = 2, 4, 8, 16, 32 or
* 64 bits each. Each element contains the same value: a run
* of between 1 and e-1 non-zero bits, rotated within the
* element by between 0 and e-1 bits.
*
* The element size and run length are encoded into immn (1 bit)
* and imms (6 bits) as follows:
* 64 bit elements: immn = 1, imms = <length of run - 1>
* 32 bit elements: immn = 0, imms = 0 : <length of run - 1>
* 16 bit elements: immn = 0, imms = 10 : <length of run - 1>
* 8 bit elements: immn = 0, imms = 110 : <length of run - 1>
* 4 bit elements: immn = 0, imms = 1110 : <length of run - 1>
* 2 bit elements: immn = 0, imms = 11110 : <length of run - 1>
* Notice that immn = 0, imms = 11111x is the only combination
* not covered by one of the above options; this is reserved.
* Further, <length of run - 1> all-ones is a reserved pattern.
*
* In all cases the rotation is by immr % e (and immr is 6 bits).
*/
/* First determine the element size */
len = 31 - clz32((immn << 6) | (~imms & 0x3f));
if (len < 1) {
/* This is the immn == 0, imms == 0x11111x case */
return false;
}
e = 1 << len;
levels = e - 1;
s = imms & levels;
r = immr & levels;
if (s == levels) {
/* <length of run - 1> mustn't be all-ones. */
return false;
}
/* Create the value of one element: s+1 set bits rotated
* by r within the element (which is e bits wide)...
*/
mask = MAKE_64BIT_MASK(0, s + 1);
if (r) {
mask = (mask >> r) | (mask << (e - r));
mask &= MAKE_64BIT_MASK(0, e);
}
/* ...then replicate the element over the whole 64 bit value */
mask = bitfield_replicate(mask, e);
*result = mask;
return true;
}
static bool gen_rri_log(DisasContext *s, arg_rri_log *a, bool set_cc,
void (*fn)(TCGv_i64, TCGv_i64, int64_t))
{
TCGv_i64 tcg_rd, tcg_rn;
uint64_t imm;
/* Some immediate field values are reserved. */
if (!logic_imm_decode_wmask(&imm, extract32(a->dbm, 12, 1),
extract32(a->dbm, 0, 6),
extract32(a->dbm, 6, 6))) {
return false;
}
if (!a->sf) {
imm &= 0xffffffffull;
}
tcg_rd = set_cc ? cpu_reg(s, a->rd) : cpu_reg_sp(s, a->rd);
tcg_rn = cpu_reg(s, a->rn);
fn(tcg_rd, tcg_rn, imm);
if (set_cc) {
gen_logic_CC(a->sf, tcg_rd);
}
if (!a->sf) {
tcg_gen_ext32u_i64(tcg_rd, tcg_rd);
}
return true;
}
TRANS(AND_i, gen_rri_log, a, false, tcg_gen_andi_i64)
TRANS(ORR_i, gen_rri_log, a, false, tcg_gen_ori_i64)
TRANS(EOR_i, gen_rri_log, a, false, tcg_gen_xori_i64)
TRANS(ANDS_i, gen_rri_log, a, true, tcg_gen_andi_i64)
/*
* Move wide (immediate)
*/
static bool trans_MOVZ(DisasContext *s, arg_movw *a)
{
int pos = a->hw << 4;
tcg_gen_movi_i64(cpu_reg(s, a->rd), (uint64_t)a->imm << pos);
return true;
}
static bool trans_MOVN(DisasContext *s, arg_movw *a)
{
int pos = a->hw << 4;
uint64_t imm = a->imm;
imm = ~(imm << pos);
if (!a->sf) {
imm = (uint32_t)imm;
}
tcg_gen_movi_i64(cpu_reg(s, a->rd), imm);
return true;
}
static bool trans_MOVK(DisasContext *s, arg_movw *a)
{
int pos = a->hw << 4;
TCGv_i64 tcg_rd, tcg_im;
tcg_rd = cpu_reg(s, a->rd);
tcg_im = tcg_constant_i64(a->imm);
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_im, pos, 16);
if (!a->sf) {
tcg_gen_ext32u_i64(tcg_rd, tcg_rd);
}
return true;
}
/*
* Bitfield
*/
static bool trans_SBFM(DisasContext *s, arg_SBFM *a)
{
TCGv_i64 tcg_rd = cpu_reg(s, a->rd);
TCGv_i64 tcg_tmp = read_cpu_reg(s, a->rn, 1);
unsigned int bitsize = a->sf ? 64 : 32;
unsigned int ri = a->immr;
unsigned int si = a->imms;
unsigned int pos, len;
if (si >= ri) {
/* Wd<s-r:0> = Wn<s:r> */
len = (si - ri) + 1;
tcg_gen_sextract_i64(tcg_rd, tcg_tmp, ri, len);
if (!a->sf) {
tcg_gen_ext32u_i64(tcg_rd, tcg_rd);
}
} else {
/* Wd<32+s-r,32-r> = Wn<s:0> */
len = si + 1;
pos = (bitsize - ri) & (bitsize - 1);
if (len < ri) {
/*
* Sign extend the destination field from len to fill the
* balance of the word. Let the deposit below insert all
* of those sign bits.
*/
tcg_gen_sextract_i64(tcg_tmp, tcg_tmp, 0, len);
len = ri;
}
/*
* We start with zero, and we haven't modified any bits outside
* bitsize, therefore no final zero-extension is unneeded for !sf.
*/
tcg_gen_deposit_z_i64(tcg_rd, tcg_tmp, pos, len);
}
return true;
}
static bool trans_UBFM(DisasContext *s, arg_UBFM *a)
{
TCGv_i64 tcg_rd = cpu_reg(s, a->rd);
TCGv_i64 tcg_tmp = read_cpu_reg(s, a->rn, 1);
unsigned int bitsize = a->sf ? 64 : 32;
unsigned int ri = a->immr;
unsigned int si = a->imms;
unsigned int pos, len;
tcg_rd = cpu_reg(s, a->rd);
tcg_tmp = read_cpu_reg(s, a->rn, 1);
if (si >= ri) {
/* Wd<s-r:0> = Wn<s:r> */
len = (si - ri) + 1;
tcg_gen_extract_i64(tcg_rd, tcg_tmp, ri, len);
} else {
/* Wd<32+s-r,32-r> = Wn<s:0> */
len = si + 1;
pos = (bitsize - ri) & (bitsize - 1);
tcg_gen_deposit_z_i64(tcg_rd, tcg_tmp, pos, len);
}
return true;
}
static bool trans_BFM(DisasContext *s, arg_BFM *a)
{
TCGv_i64 tcg_rd = cpu_reg(s, a->rd);
TCGv_i64 tcg_tmp = read_cpu_reg(s, a->rn, 1);
unsigned int bitsize = a->sf ? 64 : 32;
unsigned int ri = a->immr;
unsigned int si = a->imms;
unsigned int pos, len;
tcg_rd = cpu_reg(s, a->rd);
tcg_tmp = read_cpu_reg(s, a->rn, 1);
if (si >= ri) {
/* Wd<s-r:0> = Wn<s:r> */
tcg_gen_shri_i64(tcg_tmp, tcg_tmp, ri);
len = (si - ri) + 1;
pos = 0;
} else {
/* Wd<32+s-r,32-r> = Wn<s:0> */
len = si + 1;
pos = (bitsize - ri) & (bitsize - 1);
}
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, pos, len);
if (!a->sf) {
tcg_gen_ext32u_i64(tcg_rd, tcg_rd);
}
return true;
}
static bool trans_EXTR(DisasContext *s, arg_extract *a)
{
TCGv_i64 tcg_rd, tcg_rm, tcg_rn;
tcg_rd = cpu_reg(s, a->rd);
if (unlikely(a->imm == 0)) {
/*
* tcg shl_i32/shl_i64 is undefined for 32/64 bit shifts,
* so an extract from bit 0 is a special case.
*/
if (a->sf) {
tcg_gen_mov_i64(tcg_rd, cpu_reg(s, a->rm));
} else {
tcg_gen_ext32u_i64(tcg_rd, cpu_reg(s, a->rm));
}
} else {
tcg_rm = cpu_reg(s, a->rm);
tcg_rn = cpu_reg(s, a->rn);
if (a->sf) {
/* Specialization to ROR happens in EXTRACT2. */
tcg_gen_extract2_i64(tcg_rd, tcg_rm, tcg_rn, a->imm);
} else {
TCGv_i32 t0 = tcg_temp_new_i32();
tcg_gen_extrl_i64_i32(t0, tcg_rm);
if (a->rm == a->rn) {
tcg_gen_rotri_i32(t0, t0, a->imm);
} else {
TCGv_i32 t1 = tcg_temp_new_i32();
tcg_gen_extrl_i64_i32(t1, tcg_rn);
tcg_gen_extract2_i32(t0, t0, t1, a->imm);
}
tcg_gen_extu_i32_i64(tcg_rd, t0);
}
}
return true;
}
/* Shift a TCGv src by TCGv shift_amount, put result in dst.
* Note that it is the caller's responsibility to ensure that the
* shift amount is in range (ie 0..31 or 0..63) and provide the ARM
* mandated semantics for out of range shifts.
*/
static void shift_reg(TCGv_i64 dst, TCGv_i64 src, int sf,
enum a64_shift_type shift_type, TCGv_i64 shift_amount)
{
switch (shift_type) {
case A64_SHIFT_TYPE_LSL:
tcg_gen_shl_i64(dst, src, shift_amount);
break;
case A64_SHIFT_TYPE_LSR:
tcg_gen_shr_i64(dst, src, shift_amount);
break;
case A64_SHIFT_TYPE_ASR:
if (!sf) {
tcg_gen_ext32s_i64(dst, src);
}
tcg_gen_sar_i64(dst, sf ? src : dst, shift_amount);
break;
case A64_SHIFT_TYPE_ROR:
if (sf) {
tcg_gen_rotr_i64(dst, src, shift_amount);
} else {
TCGv_i32 t0, t1;
t0 = tcg_temp_new_i32();
t1 = tcg_temp_new_i32();
tcg_gen_extrl_i64_i32(t0, src);
tcg_gen_extrl_i64_i32(t1, shift_amount);
tcg_gen_rotr_i32(t0, t0, t1);
tcg_gen_extu_i32_i64(dst, t0);
}
break;
default:
assert(FALSE); /* all shift types should be handled */
break;
}
if (!sf) { /* zero extend final result */
tcg_gen_ext32u_i64(dst, dst);
}
}
/* Shift a TCGv src by immediate, put result in dst.
* The shift amount must be in range (this should always be true as the
* relevant instructions will UNDEF on bad shift immediates).
*/
static void shift_reg_imm(TCGv_i64 dst, TCGv_i64 src, int sf,
enum a64_shift_type shift_type, unsigned int shift_i)
{
assert(shift_i < (sf ? 64 : 32));
if (shift_i == 0) {
tcg_gen_mov_i64(dst, src);
} else {
shift_reg(dst, src, sf, shift_type, tcg_constant_i64(shift_i));
}
}
/* Logical (shifted register)
* 31 30 29 28 24 23 22 21 20 16 15 10 9 5 4 0
* +----+-----+-----------+-------+---+------+--------+------+------+
* | sf | opc | 0 1 0 1 0 | shift | N | Rm | imm6 | Rn | Rd |
* +----+-----+-----------+-------+---+------+--------+------+------+
*/
static void disas_logic_reg(DisasContext *s, uint32_t insn)
{
TCGv_i64 tcg_rd, tcg_rn, tcg_rm;
unsigned int sf, opc, shift_type, invert, rm, shift_amount, rn, rd;
sf = extract32(insn, 31, 1);
opc = extract32(insn, 29, 2);
shift_type = extract32(insn, 22, 2);
invert = extract32(insn, 21, 1);
rm = extract32(insn, 16, 5);
shift_amount = extract32(insn, 10, 6);
rn = extract32(insn, 5, 5);
rd = extract32(insn, 0, 5);
if (!sf && (shift_amount & (1 << 5))) {
unallocated_encoding(s);
return;
}
tcg_rd = cpu_reg(s, rd);
if (opc == 1 && shift_amount == 0 && shift_type == 0 && rn == 31) {
/* Unshifted ORR and ORN with WZR/XZR is the standard encoding for
* register-register MOV and MVN, so it is worth special casing.
*/
tcg_rm = cpu_reg(s, rm);
if (invert) {
tcg_gen_not_i64(tcg_rd, tcg_rm);
if (!sf) {
tcg_gen_ext32u_i64(tcg_rd, tcg_rd);
}
} else {
if (sf) {
tcg_gen_mov_i64(tcg_rd, tcg_rm);
} else {
tcg_gen_ext32u_i64(tcg_rd, tcg_rm);
}
}
return;
}
tcg_rm = read_cpu_reg(s, rm, sf);
if (shift_amount) {
shift_reg_imm(tcg_rm, tcg_rm, sf, shift_type, shift_amount);
}
tcg_rn = cpu_reg(s, rn);
switch (opc | (invert << 2)) {
case 0: /* AND */
case 3: /* ANDS */
tcg_gen_and_i64(tcg_rd, tcg_rn, tcg_rm);
break;
case 1: /* ORR */
tcg_gen_or_i64(tcg_rd, tcg_rn, tcg_rm);
break;
case 2: /* EOR */
tcg_gen_xor_i64(tcg_rd, tcg_rn, tcg_rm);
break;
case 4: /* BIC */
case 7: /* BICS */
tcg_gen_andc_i64(tcg_rd, tcg_rn, tcg_rm);
break;
case 5: /* ORN */
tcg_gen_orc_i64(tcg_rd, tcg_rn, tcg_rm);
break;
case 6: /* EON */
tcg_gen_eqv_i64(tcg_rd, tcg_rn, tcg_rm);
break;
default:
assert(FALSE);
break;
}
if (!sf) {
tcg_gen_ext32u_i64(tcg_rd, tcg_rd);
}
if (opc == 3) {
gen_logic_CC(sf, tcg_rd);
}
}
/*
* Add/subtract (extended register)
*
* 31|30|29|28 24|23 22|21|20 16|15 13|12 10|9 5|4 0|
* +--+--+--+-----------+-----+--+-------+------+------+----+----+
* |sf|op| S| 0 1 0 1 1 | opt | 1| Rm |option| imm3 | Rn | Rd |
* +--+--+--+-----------+-----+--+-------+------+------+----+----+
*
* sf: 0 -> 32bit, 1 -> 64bit
* op: 0 -> add , 1 -> sub
* S: 1 -> set flags
* opt: 00
* option: extension type (see DecodeRegExtend)
* imm3: optional shift to Rm
*
* Rd = Rn + LSL(extend(Rm), amount)
*/
static void disas_add_sub_ext_reg(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int imm3 = extract32(insn, 10, 3);
int option = extract32(insn, 13, 3);
int rm = extract32(insn, 16, 5);
int opt = extract32(insn, 22, 2);
bool setflags = extract32(insn, 29, 1);
bool sub_op = extract32(insn, 30, 1);
bool sf = extract32(insn, 31, 1);
TCGv_i64 tcg_rm, tcg_rn; /* temps */
TCGv_i64 tcg_rd;
TCGv_i64 tcg_result;
if (imm3 > 4 || opt != 0) {
unallocated_encoding(s);
return;
}
/* non-flag setting ops may use SP */
if (!setflags) {
tcg_rd = cpu_reg_sp(s, rd);
} else {
tcg_rd = cpu_reg(s, rd);
}
tcg_rn = read_cpu_reg_sp(s, rn, sf);
tcg_rm = read_cpu_reg(s, rm, sf);
ext_and_shift_reg(tcg_rm, tcg_rm, option, imm3);
tcg_result = tcg_temp_new_i64();
if (!setflags) {
if (sub_op) {
tcg_gen_sub_i64(tcg_result, tcg_rn, tcg_rm);
} else {
tcg_gen_add_i64(tcg_result, tcg_rn, tcg_rm);
}
} else {
if (sub_op) {
gen_sub_CC(sf, tcg_result, tcg_rn, tcg_rm);
} else {
gen_add_CC(sf, tcg_result, tcg_rn, tcg_rm);
}
}
if (sf) {
tcg_gen_mov_i64(tcg_rd, tcg_result);
} else {
tcg_gen_ext32u_i64(tcg_rd, tcg_result);
}
}
/*
* Add/subtract (shifted register)
*
* 31 30 29 28 24 23 22 21 20 16 15 10 9 5 4 0
* +--+--+--+-----------+-----+--+-------+---------+------+------+
* |sf|op| S| 0 1 0 1 1 |shift| 0| Rm | imm6 | Rn | Rd |
* +--+--+--+-----------+-----+--+-------+---------+------+------+
*
* sf: 0 -> 32bit, 1 -> 64bit
* op: 0 -> add , 1 -> sub
* S: 1 -> set flags
* shift: 00 -> LSL, 01 -> LSR, 10 -> ASR, 11 -> RESERVED
* imm6: Shift amount to apply to Rm before the add/sub
*/
static void disas_add_sub_reg(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int imm6 = extract32(insn, 10, 6);
int rm = extract32(insn, 16, 5);
int shift_type = extract32(insn, 22, 2);
bool setflags = extract32(insn, 29, 1);
bool sub_op = extract32(insn, 30, 1);
bool sf = extract32(insn, 31, 1);
TCGv_i64 tcg_rd = cpu_reg(s, rd);
TCGv_i64 tcg_rn, tcg_rm;
TCGv_i64 tcg_result;
if ((shift_type == 3) || (!sf && (imm6 > 31))) {
unallocated_encoding(s);
return;
}
tcg_rn = read_cpu_reg(s, rn, sf);
tcg_rm = read_cpu_reg(s, rm, sf);
shift_reg_imm(tcg_rm, tcg_rm, sf, shift_type, imm6);
tcg_result = tcg_temp_new_i64();
if (!setflags) {
if (sub_op) {
tcg_gen_sub_i64(tcg_result, tcg_rn, tcg_rm);
} else {
tcg_gen_add_i64(tcg_result, tcg_rn, tcg_rm);
}
} else {
if (sub_op) {
gen_sub_CC(sf, tcg_result, tcg_rn, tcg_rm);
} else {
gen_add_CC(sf, tcg_result, tcg_rn, tcg_rm);
}
}
if (sf) {
tcg_gen_mov_i64(tcg_rd, tcg_result);
} else {
tcg_gen_ext32u_i64(tcg_rd, tcg_result);
}
}
/* Data-processing (3 source)
*
* 31 30 29 28 24 23 21 20 16 15 14 10 9 5 4 0
* +--+------+-----------+------+------+----+------+------+------+
* |sf| op54 | 1 1 0 1 1 | op31 | Rm | o0 | Ra | Rn | Rd |
* +--+------+-----------+------+------+----+------+------+------+
*/
static void disas_data_proc_3src(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int ra = extract32(insn, 10, 5);
int rm = extract32(insn, 16, 5);
int op_id = (extract32(insn, 29, 3) << 4) |
(extract32(insn, 21, 3) << 1) |
extract32(insn, 15, 1);
bool sf = extract32(insn, 31, 1);
bool is_sub = extract32(op_id, 0, 1);
bool is_high = extract32(op_id, 2, 1);
bool is_signed = false;
TCGv_i64 tcg_op1;
TCGv_i64 tcg_op2;
TCGv_i64 tcg_tmp;
/* Note that op_id is sf:op54:op31:o0 so it includes the 32/64 size flag */
switch (op_id) {
case 0x42: /* SMADDL */
case 0x43: /* SMSUBL */
case 0x44: /* SMULH */
is_signed = true;
break;
case 0x0: /* MADD (32bit) */
case 0x1: /* MSUB (32bit) */
case 0x40: /* MADD (64bit) */
case 0x41: /* MSUB (64bit) */
case 0x4a: /* UMADDL */
case 0x4b: /* UMSUBL */
case 0x4c: /* UMULH */
break;
default:
unallocated_encoding(s);
return;
}
if (is_high) {
TCGv_i64 low_bits = tcg_temp_new_i64(); /* low bits discarded */
TCGv_i64 tcg_rd = cpu_reg(s, rd);
TCGv_i64 tcg_rn = cpu_reg(s, rn);
TCGv_i64 tcg_rm = cpu_reg(s, rm);
if (is_signed) {
tcg_gen_muls2_i64(low_bits, tcg_rd, tcg_rn, tcg_rm);
} else {
tcg_gen_mulu2_i64(low_bits, tcg_rd, tcg_rn, tcg_rm);
}
return;
}
tcg_op1 = tcg_temp_new_i64();
tcg_op2 = tcg_temp_new_i64();
tcg_tmp = tcg_temp_new_i64();
if (op_id < 0x42) {
tcg_gen_mov_i64(tcg_op1, cpu_reg(s, rn));
tcg_gen_mov_i64(tcg_op2, cpu_reg(s, rm));
} else {
if (is_signed) {
tcg_gen_ext32s_i64(tcg_op1, cpu_reg(s, rn));
tcg_gen_ext32s_i64(tcg_op2, cpu_reg(s, rm));
} else {
tcg_gen_ext32u_i64(tcg_op1, cpu_reg(s, rn));
tcg_gen_ext32u_i64(tcg_op2, cpu_reg(s, rm));
}
}
if (ra == 31 && !is_sub) {
/* Special-case MADD with rA == XZR; it is the standard MUL alias */
tcg_gen_mul_i64(cpu_reg(s, rd), tcg_op1, tcg_op2);
} else {
tcg_gen_mul_i64(tcg_tmp, tcg_op1, tcg_op2);
if (is_sub) {
tcg_gen_sub_i64(cpu_reg(s, rd), cpu_reg(s, ra), tcg_tmp);
} else {
tcg_gen_add_i64(cpu_reg(s, rd), cpu_reg(s, ra), tcg_tmp);
}
}
if (!sf) {
tcg_gen_ext32u_i64(cpu_reg(s, rd), cpu_reg(s, rd));
}
}
/* Add/subtract (with carry)
* 31 30 29 28 27 26 25 24 23 22 21 20 16 15 10 9 5 4 0
* +--+--+--+------------------------+------+-------------+------+-----+
* |sf|op| S| 1 1 0 1 0 0 0 0 | rm | 0 0 0 0 0 0 | Rn | Rd |
* +--+--+--+------------------------+------+-------------+------+-----+
*/
static void disas_adc_sbc(DisasContext *s, uint32_t insn)
{
unsigned int sf, op, setflags, rm, rn, rd;
TCGv_i64 tcg_y, tcg_rn, tcg_rd;
sf = extract32(insn, 31, 1);
op = extract32(insn, 30, 1);
setflags = extract32(insn, 29, 1);
rm = extract32(insn, 16, 5);
rn = extract32(insn, 5, 5);
rd = extract32(insn, 0, 5);
tcg_rd = cpu_reg(s, rd);
tcg_rn = cpu_reg(s, rn);
if (op) {
tcg_y = tcg_temp_new_i64();
tcg_gen_not_i64(tcg_y, cpu_reg(s, rm));
} else {
tcg_y = cpu_reg(s, rm);
}
if (setflags) {
gen_adc_CC(sf, tcg_rd, tcg_rn, tcg_y);
} else {
gen_adc(sf, tcg_rd, tcg_rn, tcg_y);
}
}
/*
* Rotate right into flags
* 31 30 29 21 15 10 5 4 0
* +--+--+--+-----------------+--------+-----------+------+--+------+
* |sf|op| S| 1 1 0 1 0 0 0 0 | imm6 | 0 0 0 0 1 | Rn |o2| mask |
* +--+--+--+-----------------+--------+-----------+------+--+------+
*/
static void disas_rotate_right_into_flags(DisasContext *s, uint32_t insn)
{
int mask = extract32(insn, 0, 4);
int o2 = extract32(insn, 4, 1);
int rn = extract32(insn, 5, 5);
int imm6 = extract32(insn, 15, 6);
int sf_op_s = extract32(insn, 29, 3);
TCGv_i64 tcg_rn;
TCGv_i32 nzcv;
if (sf_op_s != 5 || o2 != 0 || !dc_isar_feature(aa64_condm_4, s)) {
unallocated_encoding(s);
return;
}
tcg_rn = read_cpu_reg(s, rn, 1);
tcg_gen_rotri_i64(tcg_rn, tcg_rn, imm6);
nzcv = tcg_temp_new_i32();
tcg_gen_extrl_i64_i32(nzcv, tcg_rn);
if (mask & 8) { /* N */
tcg_gen_shli_i32(cpu_NF, nzcv, 31 - 3);
}
if (mask & 4) { /* Z */
tcg_gen_not_i32(cpu_ZF, nzcv);
tcg_gen_andi_i32(cpu_ZF, cpu_ZF, 4);
}
if (mask & 2) { /* C */
tcg_gen_extract_i32(cpu_CF, nzcv, 1, 1);
}
if (mask & 1) { /* V */
tcg_gen_shli_i32(cpu_VF, nzcv, 31 - 0);
}
}
/*
* Evaluate into flags
* 31 30 29 21 15 14 10 5 4 0
* +--+--+--+-----------------+---------+----+---------+------+--+------+
* |sf|op| S| 1 1 0 1 0 0 0 0 | opcode2 | sz | 0 0 1 0 | Rn |o3| mask |
* +--+--+--+-----------------+---------+----+---------+------+--+------+
*/
static void disas_evaluate_into_flags(DisasContext *s, uint32_t insn)
{
int o3_mask = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int o2 = extract32(insn, 15, 6);
int sz = extract32(insn, 14, 1);
int sf_op_s = extract32(insn, 29, 3);
TCGv_i32 tmp;
int shift;
if (sf_op_s != 1 || o2 != 0 || o3_mask != 0xd ||
!dc_isar_feature(aa64_condm_4, s)) {
unallocated_encoding(s);
return;
}
shift = sz ? 16 : 24; /* SETF16 or SETF8 */
tmp = tcg_temp_new_i32();
tcg_gen_extrl_i64_i32(tmp, cpu_reg(s, rn));
tcg_gen_shli_i32(cpu_NF, tmp, shift);
tcg_gen_shli_i32(cpu_VF, tmp, shift - 1);
tcg_gen_mov_i32(cpu_ZF, cpu_NF);
tcg_gen_xor_i32(cpu_VF, cpu_VF, cpu_NF);
}
/* Conditional compare (immediate / register)
* 31 30 29 28 27 26 25 24 23 22 21 20 16 15 12 11 10 9 5 4 3 0
* +--+--+--+------------------------+--------+------+----+--+------+--+-----+
* |sf|op| S| 1 1 0 1 0 0 1 0 |imm5/rm | cond |i/r |o2| Rn |o3|nzcv |
* +--+--+--+------------------------+--------+------+----+--+------+--+-----+
* [1] y [0] [0]
*/
static void disas_cc(DisasContext *s, uint32_t insn)
{
unsigned int sf, op, y, cond, rn, nzcv, is_imm;
TCGv_i32 tcg_t0, tcg_t1, tcg_t2;
TCGv_i64 tcg_tmp, tcg_y, tcg_rn;
DisasCompare c;
if (!extract32(insn, 29, 1)) {
unallocated_encoding(s);
return;
}
if (insn & (1 << 10 | 1 << 4)) {
unallocated_encoding(s);
return;
}
sf = extract32(insn, 31, 1);
op = extract32(insn, 30, 1);
is_imm = extract32(insn, 11, 1);
y = extract32(insn, 16, 5); /* y = rm (reg) or imm5 (imm) */
cond = extract32(insn, 12, 4);
rn = extract32(insn, 5, 5);
nzcv = extract32(insn, 0, 4);
/* Set T0 = !COND. */
tcg_t0 = tcg_temp_new_i32();
arm_test_cc(&c, cond);
tcg_gen_setcondi_i32(tcg_invert_cond(c.cond), tcg_t0, c.value, 0);
/* Load the arguments for the new comparison. */
if (is_imm) {
tcg_y = tcg_temp_new_i64();
tcg_gen_movi_i64(tcg_y, y);
} else {
tcg_y = cpu_reg(s, y);
}
tcg_rn = cpu_reg(s, rn);
/* Set the flags for the new comparison. */
tcg_tmp = tcg_temp_new_i64();
if (op) {
gen_sub_CC(sf, tcg_tmp, tcg_rn, tcg_y);
} else {
gen_add_CC(sf, tcg_tmp, tcg_rn, tcg_y);
}
/* If COND was false, force the flags to #nzcv. Compute two masks
* to help with this: T1 = (COND ? 0 : -1), T2 = (COND ? -1 : 0).
* For tcg hosts that support ANDC, we can make do with just T1.
* In either case, allow the tcg optimizer to delete any unused mask.
*/
tcg_t1 = tcg_temp_new_i32();
tcg_t2 = tcg_temp_new_i32();
tcg_gen_neg_i32(tcg_t1, tcg_t0);
tcg_gen_subi_i32(tcg_t2, tcg_t0, 1);
if (nzcv & 8) { /* N */
tcg_gen_or_i32(cpu_NF, cpu_NF, tcg_t1);
} else {
if (TCG_TARGET_HAS_andc_i32) {
tcg_gen_andc_i32(cpu_NF, cpu_NF, tcg_t1);
} else {
tcg_gen_and_i32(cpu_NF, cpu_NF, tcg_t2);
}
}
if (nzcv & 4) { /* Z */
if (TCG_TARGET_HAS_andc_i32) {
tcg_gen_andc_i32(cpu_ZF, cpu_ZF, tcg_t1);
} else {
tcg_gen_and_i32(cpu_ZF, cpu_ZF, tcg_t2);
}
} else {
tcg_gen_or_i32(cpu_ZF, cpu_ZF, tcg_t0);
}
if (nzcv & 2) { /* C */
tcg_gen_or_i32(cpu_CF, cpu_CF, tcg_t0);
} else {
if (TCG_TARGET_HAS_andc_i32) {
tcg_gen_andc_i32(cpu_CF, cpu_CF, tcg_t1);
} else {
tcg_gen_and_i32(cpu_CF, cpu_CF, tcg_t2);
}
}
if (nzcv & 1) { /* V */
tcg_gen_or_i32(cpu_VF, cpu_VF, tcg_t1);
} else {
if (TCG_TARGET_HAS_andc_i32) {
tcg_gen_andc_i32(cpu_VF, cpu_VF, tcg_t1);
} else {
tcg_gen_and_i32(cpu_VF, cpu_VF, tcg_t2);
}
}
}
/* Conditional select
* 31 30 29 28 21 20 16 15 12 11 10 9 5 4 0
* +----+----+---+-----------------+------+------+-----+------+------+
* | sf | op | S | 1 1 0 1 0 1 0 0 | Rm | cond | op2 | Rn | Rd |
* +----+----+---+-----------------+------+------+-----+------+------+
*/
static void disas_cond_select(DisasContext *s, uint32_t insn)
{
unsigned int sf, else_inv, rm, cond, else_inc, rn, rd;
TCGv_i64 tcg_rd, zero;
DisasCompare64 c;
if (extract32(insn, 29, 1) || extract32(insn, 11, 1)) {
/* S == 1 or op2<1> == 1 */
unallocated_encoding(s);
return;
}
sf = extract32(insn, 31, 1);
else_inv = extract32(insn, 30, 1);
rm = extract32(insn, 16, 5);
cond = extract32(insn, 12, 4);
else_inc = extract32(insn, 10, 1);
rn = extract32(insn, 5, 5);
rd = extract32(insn, 0, 5);
tcg_rd = cpu_reg(s, rd);
a64_test_cc(&c, cond);
zero = tcg_constant_i64(0);
if (rn == 31 && rm == 31 && (else_inc ^ else_inv)) {
/* CSET & CSETM. */
if (else_inv) {
tcg_gen_negsetcond_i64(tcg_invert_cond(c.cond),
tcg_rd, c.value, zero);
} else {
tcg_gen_setcond_i64(tcg_invert_cond(c.cond),
tcg_rd, c.value, zero);
}
} else {
TCGv_i64 t_true = cpu_reg(s, rn);
TCGv_i64 t_false = read_cpu_reg(s, rm, 1);
if (else_inv && else_inc) {
tcg_gen_neg_i64(t_false, t_false);
} else if (else_inv) {
tcg_gen_not_i64(t_false, t_false);
} else if (else_inc) {
tcg_gen_addi_i64(t_false, t_false, 1);
}
tcg_gen_movcond_i64(c.cond, tcg_rd, c.value, zero, t_true, t_false);
}
if (!sf) {
tcg_gen_ext32u_i64(tcg_rd, tcg_rd);
}
}
static void handle_clz(DisasContext *s, unsigned int sf,
unsigned int rn, unsigned int rd)
{
TCGv_i64 tcg_rd, tcg_rn;
tcg_rd = cpu_reg(s, rd);
tcg_rn = cpu_reg(s, rn);
if (sf) {
tcg_gen_clzi_i64(tcg_rd, tcg_rn, 64);
} else {
TCGv_i32 tcg_tmp32 = tcg_temp_new_i32();
tcg_gen_extrl_i64_i32(tcg_tmp32, tcg_rn);
tcg_gen_clzi_i32(tcg_tmp32, tcg_tmp32, 32);
tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32);
}
}
static void handle_cls(DisasContext *s, unsigned int sf,
unsigned int rn, unsigned int rd)
{
TCGv_i64 tcg_rd, tcg_rn;
tcg_rd = cpu_reg(s, rd);
tcg_rn = cpu_reg(s, rn);
if (sf) {
tcg_gen_clrsb_i64(tcg_rd, tcg_rn);
} else {
TCGv_i32 tcg_tmp32 = tcg_temp_new_i32();
tcg_gen_extrl_i64_i32(tcg_tmp32, tcg_rn);
tcg_gen_clrsb_i32(tcg_tmp32, tcg_tmp32);
tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32);
}
}
static void handle_rbit(DisasContext *s, unsigned int sf,
unsigned int rn, unsigned int rd)
{
TCGv_i64 tcg_rd, tcg_rn;
tcg_rd = cpu_reg(s, rd);
tcg_rn = cpu_reg(s, rn);
if (sf) {
gen_helper_rbit64(tcg_rd, tcg_rn);
} else {
TCGv_i32 tcg_tmp32 = tcg_temp_new_i32();
tcg_gen_extrl_i64_i32(tcg_tmp32, tcg_rn);
gen_helper_rbit(tcg_tmp32, tcg_tmp32);
tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32);
}
}
/* REV with sf==1, opcode==3 ("REV64") */
static void handle_rev64(DisasContext *s, unsigned int sf,
unsigned int rn, unsigned int rd)
{
if (!sf) {
unallocated_encoding(s);
return;
}
tcg_gen_bswap64_i64(cpu_reg(s, rd), cpu_reg(s, rn));
}
/* REV with sf==0, opcode==2
* REV32 (sf==1, opcode==2)
*/
static void handle_rev32(DisasContext *s, unsigned int sf,
unsigned int rn, unsigned int rd)
{
TCGv_i64 tcg_rd = cpu_reg(s, rd);
TCGv_i64 tcg_rn = cpu_reg(s, rn);
if (sf) {
tcg_gen_bswap64_i64(tcg_rd, tcg_rn);
tcg_gen_rotri_i64(tcg_rd, tcg_rd, 32);
} else {
tcg_gen_bswap32_i64(tcg_rd, tcg_rn, TCG_BSWAP_OZ);
}
}
/* REV16 (opcode==1) */
static void handle_rev16(DisasContext *s, unsigned int sf,
unsigned int rn, unsigned int rd)
{
TCGv_i64 tcg_rd = cpu_reg(s, rd);
TCGv_i64 tcg_tmp = tcg_temp_new_i64();
TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf);
TCGv_i64 mask = tcg_constant_i64(sf ? 0x00ff00ff00ff00ffull : 0x00ff00ff);
tcg_gen_shri_i64(tcg_tmp, tcg_rn, 8);
tcg_gen_and_i64(tcg_rd, tcg_rn, mask);
tcg_gen_and_i64(tcg_tmp, tcg_tmp, mask);
tcg_gen_shli_i64(tcg_rd, tcg_rd, 8);
tcg_gen_or_i64(tcg_rd, tcg_rd, tcg_tmp);
}
/* Data-processing (1 source)
* 31 30 29 28 21 20 16 15 10 9 5 4 0
* +----+---+---+-----------------+---------+--------+------+------+
* | sf | 1 | S | 1 1 0 1 0 1 1 0 | opcode2 | opcode | Rn | Rd |
* +----+---+---+-----------------+---------+--------+------+------+
*/
static void disas_data_proc_1src(DisasContext *s, uint32_t insn)
{
unsigned int sf, opcode, opcode2, rn, rd;
TCGv_i64 tcg_rd;
if (extract32(insn, 29, 1)) {
unallocated_encoding(s);
return;
}
sf = extract32(insn, 31, 1);
opcode = extract32(insn, 10, 6);
opcode2 = extract32(insn, 16, 5);
rn = extract32(insn, 5, 5);
rd = extract32(insn, 0, 5);
#define MAP(SF, O2, O1) ((SF) | (O1 << 1) | (O2 << 7))
switch (MAP(sf, opcode2, opcode)) {
case MAP(0, 0x00, 0x00): /* RBIT */
case MAP(1, 0x00, 0x00):
handle_rbit(s, sf, rn, rd);
break;
case MAP(0, 0x00, 0x01): /* REV16 */
case MAP(1, 0x00, 0x01):
handle_rev16(s, sf, rn, rd);
break;
case MAP(0, 0x00, 0x02): /* REV/REV32 */
case MAP(1, 0x00, 0x02):
handle_rev32(s, sf, rn, rd);
break;
case MAP(1, 0x00, 0x03): /* REV64 */
handle_rev64(s, sf, rn, rd);
break;
case MAP(0, 0x00, 0x04): /* CLZ */
case MAP(1, 0x00, 0x04):
handle_clz(s, sf, rn, rd);
break;
case MAP(0, 0x00, 0x05): /* CLS */
case MAP(1, 0x00, 0x05):
handle_cls(s, sf, rn, rd);
break;
case MAP(1, 0x01, 0x00): /* PACIA */
if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_pacia(tcg_rd, tcg_env, tcg_rd, cpu_reg_sp(s, rn));
} else if (!dc_isar_feature(aa64_pauth, s)) {
goto do_unallocated;
}
break;
case MAP(1, 0x01, 0x01): /* PACIB */
if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_pacib(tcg_rd, tcg_env, tcg_rd, cpu_reg_sp(s, rn));
} else if (!dc_isar_feature(aa64_pauth, s)) {
goto do_unallocated;
}
break;
case MAP(1, 0x01, 0x02): /* PACDA */
if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_pacda(tcg_rd, tcg_env, tcg_rd, cpu_reg_sp(s, rn));
} else if (!dc_isar_feature(aa64_pauth, s)) {
goto do_unallocated;
}
break;
case MAP(1, 0x01, 0x03): /* PACDB */
if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_pacdb(tcg_rd, tcg_env, tcg_rd, cpu_reg_sp(s, rn));
} else if (!dc_isar_feature(aa64_pauth, s)) {
goto do_unallocated;
}
break;
case MAP(1, 0x01, 0x04): /* AUTIA */
if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_autia(tcg_rd, tcg_env, tcg_rd, cpu_reg_sp(s, rn));
} else if (!dc_isar_feature(aa64_pauth, s)) {
goto do_unallocated;
}
break;
case MAP(1, 0x01, 0x05): /* AUTIB */
if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_autib(tcg_rd, tcg_env, tcg_rd, cpu_reg_sp(s, rn));
} else if (!dc_isar_feature(aa64_pauth, s)) {
goto do_unallocated;
}
break;
case MAP(1, 0x01, 0x06): /* AUTDA */
if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_autda(tcg_rd, tcg_env, tcg_rd, cpu_reg_sp(s, rn));
} else if (!dc_isar_feature(aa64_pauth, s)) {
goto do_unallocated;
}
break;
case MAP(1, 0x01, 0x07): /* AUTDB */
if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_autdb(tcg_rd, tcg_env, tcg_rd, cpu_reg_sp(s, rn));
} else if (!dc_isar_feature(aa64_pauth, s)) {
goto do_unallocated;
}
break;
case MAP(1, 0x01, 0x08): /* PACIZA */
if (!dc_isar_feature(aa64_pauth, s) || rn != 31) {
goto do_unallocated;
} else if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_pacia(tcg_rd, tcg_env, tcg_rd, tcg_constant_i64(0));
}
break;
case MAP(1, 0x01, 0x09): /* PACIZB */
if (!dc_isar_feature(aa64_pauth, s) || rn != 31) {
goto do_unallocated;
} else if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_pacib(tcg_rd, tcg_env, tcg_rd, tcg_constant_i64(0));
}
break;
case MAP(1, 0x01, 0x0a): /* PACDZA */
if (!dc_isar_feature(aa64_pauth, s) || rn != 31) {
goto do_unallocated;
} else if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_pacda(tcg_rd, tcg_env, tcg_rd, tcg_constant_i64(0));
}
break;
case MAP(1, 0x01, 0x0b): /* PACDZB */
if (!dc_isar_feature(aa64_pauth, s) || rn != 31) {
goto do_unallocated;
} else if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_pacdb(tcg_rd, tcg_env, tcg_rd, tcg_constant_i64(0));
}
break;
case MAP(1, 0x01, 0x0c): /* AUTIZA */
if (!dc_isar_feature(aa64_pauth, s) || rn != 31) {
goto do_unallocated;
} else if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_autia(tcg_rd, tcg_env, tcg_rd, tcg_constant_i64(0));
}
break;
case MAP(1, 0x01, 0x0d): /* AUTIZB */
if (!dc_isar_feature(aa64_pauth, s) || rn != 31) {
goto do_unallocated;
} else if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_autib(tcg_rd, tcg_env, tcg_rd, tcg_constant_i64(0));
}
break;
case MAP(1, 0x01, 0x0e): /* AUTDZA */
if (!dc_isar_feature(aa64_pauth, s) || rn != 31) {
goto do_unallocated;
} else if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_autda(tcg_rd, tcg_env, tcg_rd, tcg_constant_i64(0));
}
break;
case MAP(1, 0x01, 0x0f): /* AUTDZB */
if (!dc_isar_feature(aa64_pauth, s) || rn != 31) {
goto do_unallocated;
} else if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_autdb(tcg_rd, tcg_env, tcg_rd, tcg_constant_i64(0));
}
break;
case MAP(1, 0x01, 0x10): /* XPACI */
if (!dc_isar_feature(aa64_pauth, s) || rn != 31) {
goto do_unallocated;
} else if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_xpaci(tcg_rd, tcg_env, tcg_rd);
}
break;
case MAP(1, 0x01, 0x11): /* XPACD */
if (!dc_isar_feature(aa64_pauth, s) || rn != 31) {
goto do_unallocated;
} else if (s->pauth_active) {
tcg_rd = cpu_reg(s, rd);
gen_helper_xpacd(tcg_rd, tcg_env, tcg_rd);
}
break;
default:
do_unallocated:
unallocated_encoding(s);
break;
}
#undef MAP
}
static void handle_div(DisasContext *s, bool is_signed, unsigned int sf,
unsigned int rm, unsigned int rn, unsigned int rd)
{
TCGv_i64 tcg_n, tcg_m, tcg_rd;
tcg_rd = cpu_reg(s, rd);
if (!sf && is_signed) {
tcg_n = tcg_temp_new_i64();
tcg_m = tcg_temp_new_i64();
tcg_gen_ext32s_i64(tcg_n, cpu_reg(s, rn));
tcg_gen_ext32s_i64(tcg_m, cpu_reg(s, rm));
} else {
tcg_n = read_cpu_reg(s, rn, sf);
tcg_m = read_cpu_reg(s, rm, sf);
}
if (is_signed) {
gen_helper_sdiv64(tcg_rd, tcg_n, tcg_m);
} else {
gen_helper_udiv64(tcg_rd, tcg_n, tcg_m);
}
if (!sf) { /* zero extend final result */
tcg_gen_ext32u_i64(tcg_rd, tcg_rd);
}
}
/* LSLV, LSRV, ASRV, RORV */
static void handle_shift_reg(DisasContext *s,
enum a64_shift_type shift_type, unsigned int sf,
unsigned int rm, unsigned int rn, unsigned int rd)
{
TCGv_i64 tcg_shift = tcg_temp_new_i64();
TCGv_i64 tcg_rd = cpu_reg(s, rd);
TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf);
tcg_gen_andi_i64(tcg_shift, cpu_reg(s, rm), sf ? 63 : 31);
shift_reg(tcg_rd, tcg_rn, sf, shift_type, tcg_shift);
}
/* CRC32[BHWX], CRC32C[BHWX] */
static void handle_crc32(DisasContext *s,
unsigned int sf, unsigned int sz, bool crc32c,
unsigned int rm, unsigned int rn, unsigned int rd)
{
TCGv_i64 tcg_acc, tcg_val;
TCGv_i32 tcg_bytes;
if (!dc_isar_feature(aa64_crc32, s)
|| (sf == 1 && sz != 3)
|| (sf == 0 && sz == 3)) {
unallocated_encoding(s);
return;
}
if (sz == 3) {
tcg_val = cpu_reg(s, rm);
} else {
uint64_t mask;
switch (sz) {
case 0:
mask = 0xFF;
break;
case 1:
mask = 0xFFFF;
break;
case 2:
mask = 0xFFFFFFFF;
break;
default:
g_assert_not_reached();
}
tcg_val = tcg_temp_new_i64();
tcg_gen_andi_i64(tcg_val, cpu_reg(s, rm), mask);
}
tcg_acc = cpu_reg(s, rn);
tcg_bytes = tcg_constant_i32(1 << sz);
if (crc32c) {
gen_helper_crc32c_64(cpu_reg(s, rd), tcg_acc, tcg_val, tcg_bytes);
} else {
gen_helper_crc32_64(cpu_reg(s, rd), tcg_acc, tcg_val, tcg_bytes);
}
}
/* Data-processing (2 source)
* 31 30 29 28 21 20 16 15 10 9 5 4 0
* +----+---+---+-----------------+------+--------+------+------+
* | sf | 0 | S | 1 1 0 1 0 1 1 0 | Rm | opcode | Rn | Rd |
* +----+---+---+-----------------+------+--------+------+------+
*/
static void disas_data_proc_2src(DisasContext *s, uint32_t insn)
{
unsigned int sf, rm, opcode, rn, rd, setflag;
sf = extract32(insn, 31, 1);
setflag = extract32(insn, 29, 1);
rm = extract32(insn, 16, 5);
opcode = extract32(insn, 10, 6);
rn = extract32(insn, 5, 5);
rd = extract32(insn, 0, 5);
if (setflag && opcode != 0) {
unallocated_encoding(s);
return;
}
switch (opcode) {
case 0: /* SUBP(S) */
if (sf == 0 || !dc_isar_feature(aa64_mte_insn_reg, s)) {
goto do_unallocated;
} else {
TCGv_i64 tcg_n, tcg_m, tcg_d;
tcg_n = read_cpu_reg_sp(s, rn, true);
tcg_m = read_cpu_reg_sp(s, rm, true);
tcg_gen_sextract_i64(tcg_n, tcg_n, 0, 56);
tcg_gen_sextract_i64(tcg_m, tcg_m, 0, 56);
tcg_d = cpu_reg(s, rd);
if (setflag) {
gen_sub_CC(true, tcg_d, tcg_n, tcg_m);
} else {
tcg_gen_sub_i64(tcg_d, tcg_n, tcg_m);
}
}
break;
case 2: /* UDIV */
handle_div(s, false, sf, rm, rn, rd);
break;
case 3: /* SDIV */
handle_div(s, true, sf, rm, rn, rd);
break;
case 4: /* IRG */
if (sf == 0 || !dc_isar_feature(aa64_mte_insn_reg, s)) {
goto do_unallocated;
}
if (s->ata[0]) {
gen_helper_irg(cpu_reg_sp(s, rd), tcg_env,
cpu_reg_sp(s, rn), cpu_reg(s, rm));
} else {
gen_address_with_allocation_tag0(cpu_reg_sp(s, rd),
cpu_reg_sp(s, rn));
}
break;
case 5: /* GMI */
if (sf == 0 || !dc_isar_feature(aa64_mte_insn_reg, s)) {
goto do_unallocated;
} else {
TCGv_i64 t = tcg_temp_new_i64();
tcg_gen_extract_i64(t, cpu_reg_sp(s, rn), 56, 4);
tcg_gen_shl_i64(t, tcg_constant_i64(1), t);
tcg_gen_or_i64(cpu_reg(s, rd), cpu_reg(s, rm), t);
}
break;
case 8: /* LSLV */
handle_shift_reg(s, A64_SHIFT_TYPE_LSL, sf, rm, rn, rd);
break;
case 9: /* LSRV */
handle_shift_reg(s, A64_SHIFT_TYPE_LSR, sf, rm, rn, rd);
break;
case 10: /* ASRV */
handle_shift_reg(s, A64_SHIFT_TYPE_ASR, sf, rm, rn, rd);
break;
case 11: /* RORV */
handle_shift_reg(s, A64_SHIFT_TYPE_ROR, sf, rm, rn, rd);
break;
case 12: /* PACGA */
if (sf == 0 || !dc_isar_feature(aa64_pauth, s)) {
goto do_unallocated;
}
gen_helper_pacga(cpu_reg(s, rd), tcg_env,
cpu_reg(s, rn), cpu_reg_sp(s, rm));
break;
case 16:
case 17:
case 18:
case 19:
case 20:
case 21:
case 22:
case 23: /* CRC32 */
{
int sz = extract32(opcode, 0, 2);
bool crc32c = extract32(opcode, 2, 1);
handle_crc32(s, sf, sz, crc32c, rm, rn, rd);
break;
}
default:
do_unallocated:
unallocated_encoding(s);
break;
}
}
/*
* Data processing - register
* 31 30 29 28 25 21 20 16 10 0
* +--+---+--+---+-------+-----+-------+-------+---------+
* | |op0| |op1| 1 0 1 | op2 | | op3 | |
* +--+---+--+---+-------+-----+-------+-------+---------+
*/
static void disas_data_proc_reg(DisasContext *s, uint32_t insn)
{
int op0 = extract32(insn, 30, 1);
int op1 = extract32(insn, 28, 1);
int op2 = extract32(insn, 21, 4);
int op3 = extract32(insn, 10, 6);
if (!op1) {
if (op2 & 8) {
if (op2 & 1) {
/* Add/sub (extended register) */
disas_add_sub_ext_reg(s, insn);
} else {
/* Add/sub (shifted register) */
disas_add_sub_reg(s, insn);
}
} else {
/* Logical (shifted register) */
disas_logic_reg(s, insn);
}
return;
}
switch (op2) {
case 0x0:
switch (op3) {
case 0x00: /* Add/subtract (with carry) */
disas_adc_sbc(s, insn);
break;
case 0x01: /* Rotate right into flags */
case 0x21:
disas_rotate_right_into_flags(s, insn);
break;
case 0x02: /* Evaluate into flags */
case 0x12:
case 0x22:
case 0x32:
disas_evaluate_into_flags(s, insn);
break;
default:
goto do_unallocated;
}
break;
case 0x2: /* Conditional compare */
disas_cc(s, insn); /* both imm and reg forms */
break;
case 0x4: /* Conditional select */
disas_cond_select(s, insn);
break;
case 0x6: /* Data-processing */
if (op0) { /* (1 source) */
disas_data_proc_1src(s, insn);
} else { /* (2 source) */
disas_data_proc_2src(s, insn);
}
break;
case 0x8 ... 0xf: /* (3 source) */
disas_data_proc_3src(s, insn);
break;
default:
do_unallocated:
unallocated_encoding(s);
break;
}
}
static void handle_fp_compare(DisasContext *s, int size,
unsigned int rn, unsigned int rm,
bool cmp_with_zero, bool signal_all_nans)
{
TCGv_i64 tcg_flags = tcg_temp_new_i64();
TCGv_ptr fpst = fpstatus_ptr(size == MO_16 ? FPST_FPCR_F16 : FPST_FPCR);
if (size == MO_64) {
TCGv_i64 tcg_vn, tcg_vm;
tcg_vn = read_fp_dreg(s, rn);
if (cmp_with_zero) {
tcg_vm = tcg_constant_i64(0);
} else {
tcg_vm = read_fp_dreg(s, rm);
}
if (signal_all_nans) {
gen_helper_vfp_cmped_a64(tcg_flags, tcg_vn, tcg_vm, fpst);
} else {
gen_helper_vfp_cmpd_a64(tcg_flags, tcg_vn, tcg_vm, fpst);
}
} else {
TCGv_i32 tcg_vn = tcg_temp_new_i32();
TCGv_i32 tcg_vm = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_vn, rn, 0, size);
if (cmp_with_zero) {
tcg_gen_movi_i32(tcg_vm, 0);
} else {
read_vec_element_i32(s, tcg_vm, rm, 0, size);
}
switch (size) {
case MO_32:
if (signal_all_nans) {
gen_helper_vfp_cmpes_a64(tcg_flags, tcg_vn, tcg_vm, fpst);
} else {
gen_helper_vfp_cmps_a64(tcg_flags, tcg_vn, tcg_vm, fpst);
}
break;
case MO_16:
if (signal_all_nans) {
gen_helper_vfp_cmpeh_a64(tcg_flags, tcg_vn, tcg_vm, fpst);
} else {
gen_helper_vfp_cmph_a64(tcg_flags, tcg_vn, tcg_vm, fpst);
}
break;
default:
g_assert_not_reached();
}
}
gen_set_nzcv(tcg_flags);
}
/* Floating point compare
* 31 30 29 28 24 23 22 21 20 16 15 14 13 10 9 5 4 0
* +---+---+---+-----------+------+---+------+-----+---------+------+-------+
* | M | 0 | S | 1 1 1 1 0 | type | 1 | Rm | op | 1 0 0 0 | Rn | op2 |
* +---+---+---+-----------+------+---+------+-----+---------+------+-------+
*/
static void disas_fp_compare(DisasContext *s, uint32_t insn)
{
unsigned int mos, type, rm, op, rn, opc, op2r;
int size;
mos = extract32(insn, 29, 3);
type = extract32(insn, 22, 2);
rm = extract32(insn, 16, 5);
op = extract32(insn, 14, 2);
rn = extract32(insn, 5, 5);
opc = extract32(insn, 3, 2);
op2r = extract32(insn, 0, 3);
if (mos || op || op2r) {
unallocated_encoding(s);
return;
}
switch (type) {
case 0:
size = MO_32;
break;
case 1:
size = MO_64;
break;
case 3:
size = MO_16;
if (dc_isar_feature(aa64_fp16, s)) {
break;
}
/* fallthru */
default:
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_fp_compare(s, size, rn, rm, opc & 1, opc & 2);
}
/* Floating point conditional compare
* 31 30 29 28 24 23 22 21 20 16 15 12 11 10 9 5 4 3 0
* +---+---+---+-----------+------+---+------+------+-----+------+----+------+
* | M | 0 | S | 1 1 1 1 0 | type | 1 | Rm | cond | 0 1 | Rn | op | nzcv |
* +---+---+---+-----------+------+---+------+------+-----+------+----+------+
*/
static void disas_fp_ccomp(DisasContext *s, uint32_t insn)
{
unsigned int mos, type, rm, cond, rn, op, nzcv;
TCGLabel *label_continue = NULL;
int size;
mos = extract32(insn, 29, 3);
type = extract32(insn, 22, 2);
rm = extract32(insn, 16, 5);
cond = extract32(insn, 12, 4);
rn = extract32(insn, 5, 5);
op = extract32(insn, 4, 1);
nzcv = extract32(insn, 0, 4);
if (mos) {
unallocated_encoding(s);
return;
}
switch (type) {
case 0:
size = MO_32;
break;
case 1:
size = MO_64;
break;
case 3:
size = MO_16;
if (dc_isar_feature(aa64_fp16, s)) {
break;
}
/* fallthru */
default:
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
if (cond < 0x0e) { /* not always */
TCGLabel *label_match = gen_new_label();
label_continue = gen_new_label();
arm_gen_test_cc(cond, label_match);
/* nomatch: */
gen_set_nzcv(tcg_constant_i64(nzcv << 28));
tcg_gen_br(label_continue);
gen_set_label(label_match);
}
handle_fp_compare(s, size, rn, rm, false, op);
if (cond < 0x0e) {
gen_set_label(label_continue);
}
}
/* Floating point conditional select
* 31 30 29 28 24 23 22 21 20 16 15 12 11 10 9 5 4 0
* +---+---+---+-----------+------+---+------+------+-----+------+------+
* | M | 0 | S | 1 1 1 1 0 | type | 1 | Rm | cond | 1 1 | Rn | Rd |
* +---+---+---+-----------+------+---+------+------+-----+------+------+
*/
static void disas_fp_csel(DisasContext *s, uint32_t insn)
{
unsigned int mos, type, rm, cond, rn, rd;
TCGv_i64 t_true, t_false;
DisasCompare64 c;
MemOp sz;
mos = extract32(insn, 29, 3);
type = extract32(insn, 22, 2);
rm = extract32(insn, 16, 5);
cond = extract32(insn, 12, 4);
rn = extract32(insn, 5, 5);
rd = extract32(insn, 0, 5);
if (mos) {
unallocated_encoding(s);
return;
}
switch (type) {
case 0:
sz = MO_32;
break;
case 1:
sz = MO_64;
break;
case 3:
sz = MO_16;
if (dc_isar_feature(aa64_fp16, s)) {
break;
}
/* fallthru */
default:
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
/* Zero extend sreg & hreg inputs to 64 bits now. */
t_true = tcg_temp_new_i64();
t_false = tcg_temp_new_i64();
read_vec_element(s, t_true, rn, 0, sz);
read_vec_element(s, t_false, rm, 0, sz);
a64_test_cc(&c, cond);
tcg_gen_movcond_i64(c.cond, t_true, c.value, tcg_constant_i64(0),
t_true, t_false);
/* Note that sregs & hregs write back zeros to the high bits,
and we've already done the zero-extension. */
write_fp_dreg(s, rd, t_true);
}
/* Floating-point data-processing (1 source) - half precision */
static void handle_fp_1src_half(DisasContext *s, int opcode, int rd, int rn)
{
TCGv_ptr fpst = NULL;
TCGv_i32 tcg_op = read_fp_hreg(s, rn);
TCGv_i32 tcg_res = tcg_temp_new_i32();
switch (opcode) {
case 0x0: /* FMOV */
tcg_gen_mov_i32(tcg_res, tcg_op);
break;
case 0x1: /* FABS */
tcg_gen_andi_i32(tcg_res, tcg_op, 0x7fff);
break;
case 0x2: /* FNEG */
tcg_gen_xori_i32(tcg_res, tcg_op, 0x8000);
break;
case 0x3: /* FSQRT */
fpst = fpstatus_ptr(FPST_FPCR_F16);
gen_helper_sqrt_f16(tcg_res, tcg_op, fpst);
break;
case 0x8: /* FRINTN */
case 0x9: /* FRINTP */
case 0xa: /* FRINTM */
case 0xb: /* FRINTZ */
case 0xc: /* FRINTA */
{
TCGv_i32 tcg_rmode;
fpst = fpstatus_ptr(FPST_FPCR_F16);
tcg_rmode = gen_set_rmode(opcode & 7, fpst);
gen_helper_advsimd_rinth(tcg_res, tcg_op, fpst);
gen_restore_rmode(tcg_rmode, fpst);
break;
}
case 0xe: /* FRINTX */
fpst = fpstatus_ptr(FPST_FPCR_F16);
gen_helper_advsimd_rinth_exact(tcg_res, tcg_op, fpst);
break;
case 0xf: /* FRINTI */
fpst = fpstatus_ptr(FPST_FPCR_F16);
gen_helper_advsimd_rinth(tcg_res, tcg_op, fpst);
break;
default:
g_assert_not_reached();
}
write_fp_sreg(s, rd, tcg_res);
}
/* Floating-point data-processing (1 source) - single precision */
static void handle_fp_1src_single(DisasContext *s, int opcode, int rd, int rn)
{
void (*gen_fpst)(TCGv_i32, TCGv_i32, TCGv_ptr);
TCGv_i32 tcg_op, tcg_res;
TCGv_ptr fpst;
int rmode = -1;
tcg_op = read_fp_sreg(s, rn);
tcg_res = tcg_temp_new_i32();
switch (opcode) {
case 0x0: /* FMOV */
tcg_gen_mov_i32(tcg_res, tcg_op);
goto done;
case 0x1: /* FABS */
gen_helper_vfp_abss(tcg_res, tcg_op);
goto done;
case 0x2: /* FNEG */
gen_helper_vfp_negs(tcg_res, tcg_op);
goto done;
case 0x3: /* FSQRT */
gen_helper_vfp_sqrts(tcg_res, tcg_op, tcg_env);
goto done;
case 0x6: /* BFCVT */
gen_fpst = gen_helper_bfcvt;
break;
case 0x8: /* FRINTN */
case 0x9: /* FRINTP */
case 0xa: /* FRINTM */
case 0xb: /* FRINTZ */
case 0xc: /* FRINTA */
rmode = opcode & 7;
gen_fpst = gen_helper_rints;
break;
case 0xe: /* FRINTX */
gen_fpst = gen_helper_rints_exact;
break;
case 0xf: /* FRINTI */
gen_fpst = gen_helper_rints;
break;
case 0x10: /* FRINT32Z */
rmode = FPROUNDING_ZERO;
gen_fpst = gen_helper_frint32_s;
break;
case 0x11: /* FRINT32X */
gen_fpst = gen_helper_frint32_s;
break;
case 0x12: /* FRINT64Z */
rmode = FPROUNDING_ZERO;
gen_fpst = gen_helper_frint64_s;
break;
case 0x13: /* FRINT64X */
gen_fpst = gen_helper_frint64_s;
break;
default:
g_assert_not_reached();
}
fpst = fpstatus_ptr(FPST_FPCR);
if (rmode >= 0) {
TCGv_i32 tcg_rmode = gen_set_rmode(rmode, fpst);
gen_fpst(tcg_res, tcg_op, fpst);
gen_restore_rmode(tcg_rmode, fpst);
} else {
gen_fpst(tcg_res, tcg_op, fpst);
}
done:
write_fp_sreg(s, rd, tcg_res);
}
/* Floating-point data-processing (1 source) - double precision */
static void handle_fp_1src_double(DisasContext *s, int opcode, int rd, int rn)
{
void (*gen_fpst)(TCGv_i64, TCGv_i64, TCGv_ptr);
TCGv_i64 tcg_op, tcg_res;
TCGv_ptr fpst;
int rmode = -1;
switch (opcode) {
case 0x0: /* FMOV */
gen_gvec_fn2(s, false, rd, rn, tcg_gen_gvec_mov, 0);
return;
}
tcg_op = read_fp_dreg(s, rn);
tcg_res = tcg_temp_new_i64();
switch (opcode) {
case 0x1: /* FABS */
gen_helper_vfp_absd(tcg_res, tcg_op);
goto done;
case 0x2: /* FNEG */
gen_helper_vfp_negd(tcg_res, tcg_op);
goto done;
case 0x3: /* FSQRT */
gen_helper_vfp_sqrtd(tcg_res, tcg_op, tcg_env);
goto done;
case 0x8: /* FRINTN */
case 0x9: /* FRINTP */
case 0xa: /* FRINTM */
case 0xb: /* FRINTZ */
case 0xc: /* FRINTA */
rmode = opcode & 7;
gen_fpst = gen_helper_rintd;
break;
case 0xe: /* FRINTX */
gen_fpst = gen_helper_rintd_exact;
break;
case 0xf: /* FRINTI */
gen_fpst = gen_helper_rintd;
break;
case 0x10: /* FRINT32Z */
rmode = FPROUNDING_ZERO;
gen_fpst = gen_helper_frint32_d;
break;
case 0x11: /* FRINT32X */
gen_fpst = gen_helper_frint32_d;
break;
case 0x12: /* FRINT64Z */
rmode = FPROUNDING_ZERO;
gen_fpst = gen_helper_frint64_d;
break;
case 0x13: /* FRINT64X */
gen_fpst = gen_helper_frint64_d;
break;
default:
g_assert_not_reached();
}
fpst = fpstatus_ptr(FPST_FPCR);
if (rmode >= 0) {
TCGv_i32 tcg_rmode = gen_set_rmode(rmode, fpst);
gen_fpst(tcg_res, tcg_op, fpst);
gen_restore_rmode(tcg_rmode, fpst);
} else {
gen_fpst(tcg_res, tcg_op, fpst);
}
done:
write_fp_dreg(s, rd, tcg_res);
}
static void handle_fp_fcvt(DisasContext *s, int opcode,
int rd, int rn, int dtype, int ntype)
{
switch (ntype) {
case 0x0:
{
TCGv_i32 tcg_rn = read_fp_sreg(s, rn);
if (dtype == 1) {
/* Single to double */
TCGv_i64 tcg_rd = tcg_temp_new_i64();
gen_helper_vfp_fcvtds(tcg_rd, tcg_rn, tcg_env);
write_fp_dreg(s, rd, tcg_rd);
} else {
/* Single to half */
TCGv_i32 tcg_rd = tcg_temp_new_i32();
TCGv_i32 ahp = get_ahp_flag();
TCGv_ptr fpst = fpstatus_ptr(FPST_FPCR);
gen_helper_vfp_fcvt_f32_to_f16(tcg_rd, tcg_rn, fpst, ahp);
/* write_fp_sreg is OK here because top half of tcg_rd is zero */
write_fp_sreg(s, rd, tcg_rd);
}
break;
}
case 0x1:
{
TCGv_i64 tcg_rn = read_fp_dreg(s, rn);
TCGv_i32 tcg_rd = tcg_temp_new_i32();
if (dtype == 0) {
/* Double to single */
gen_helper_vfp_fcvtsd(tcg_rd, tcg_rn, tcg_env);
} else {
TCGv_ptr fpst = fpstatus_ptr(FPST_FPCR);
TCGv_i32 ahp = get_ahp_flag();
/* Double to half */
gen_helper_vfp_fcvt_f64_to_f16(tcg_rd, tcg_rn, fpst, ahp);
/* write_fp_sreg is OK here because top half of tcg_rd is zero */
}
write_fp_sreg(s, rd, tcg_rd);
break;
}
case 0x3:
{
TCGv_i32 tcg_rn = read_fp_sreg(s, rn);
TCGv_ptr tcg_fpst = fpstatus_ptr(FPST_FPCR);
TCGv_i32 tcg_ahp = get_ahp_flag();
tcg_gen_ext16u_i32(tcg_rn, tcg_rn);
if (dtype == 0) {
/* Half to single */
TCGv_i32 tcg_rd = tcg_temp_new_i32();
gen_helper_vfp_fcvt_f16_to_f32(tcg_rd, tcg_rn, tcg_fpst, tcg_ahp);
write_fp_sreg(s, rd, tcg_rd);
} else {
/* Half to double */
TCGv_i64 tcg_rd = tcg_temp_new_i64();
gen_helper_vfp_fcvt_f16_to_f64(tcg_rd, tcg_rn, tcg_fpst, tcg_ahp);
write_fp_dreg(s, rd, tcg_rd);
}
break;
}
default:
g_assert_not_reached();
}
}
/* Floating point data-processing (1 source)
* 31 30 29 28 24 23 22 21 20 15 14 10 9 5 4 0
* +---+---+---+-----------+------+---+--------+-----------+------+------+
* | M | 0 | S | 1 1 1 1 0 | type | 1 | opcode | 1 0 0 0 0 | Rn | Rd |
* +---+---+---+-----------+------+---+--------+-----------+------+------+
*/
static void disas_fp_1src(DisasContext *s, uint32_t insn)
{
int mos = extract32(insn, 29, 3);
int type = extract32(insn, 22, 2);
int opcode = extract32(insn, 15, 6);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
if (mos) {
goto do_unallocated;
}
switch (opcode) {
case 0x4: case 0x5: case 0x7:
{
/* FCVT between half, single and double precision */
int dtype = extract32(opcode, 0, 2);
if (type == 2 || dtype == type) {
goto do_unallocated;
}
if (!fp_access_check(s)) {
return;
}
handle_fp_fcvt(s, opcode, rd, rn, dtype, type);
break;
}
case 0x10 ... 0x13: /* FRINT{32,64}{X,Z} */
if (type > 1 || !dc_isar_feature(aa64_frint, s)) {
goto do_unallocated;
}
/* fall through */
case 0x0 ... 0x3:
case 0x8 ... 0xc:
case 0xe ... 0xf:
/* 32-to-32 and 64-to-64 ops */
switch (type) {
case 0:
if (!fp_access_check(s)) {
return;
}
handle_fp_1src_single(s, opcode, rd, rn);
break;
case 1:
if (!fp_access_check(s)) {
return;
}
handle_fp_1src_double(s, opcode, rd, rn);
break;
case 3:
if (!dc_isar_feature(aa64_fp16, s)) {
goto do_unallocated;
}
if (!fp_access_check(s)) {
return;
}
handle_fp_1src_half(s, opcode, rd, rn);
break;
default:
goto do_unallocated;
}
break;
case 0x6:
switch (type) {
case 1: /* BFCVT */
if (!dc_isar_feature(aa64_bf16, s)) {
goto do_unallocated;
}
if (!fp_access_check(s)) {
return;
}
handle_fp_1src_single(s, opcode, rd, rn);
break;
default:
goto do_unallocated;
}
break;
default:
do_unallocated:
unallocated_encoding(s);
break;
}
}
/* Floating-point data-processing (2 source) - single precision */
static void handle_fp_2src_single(DisasContext *s, int opcode,
int rd, int rn, int rm)
{
TCGv_i32 tcg_op1;
TCGv_i32 tcg_op2;
TCGv_i32 tcg_res;
TCGv_ptr fpst;
tcg_res = tcg_temp_new_i32();
fpst = fpstatus_ptr(FPST_FPCR);
tcg_op1 = read_fp_sreg(s, rn);
tcg_op2 = read_fp_sreg(s, rm);
switch (opcode) {
case 0x0: /* FMUL */
gen_helper_vfp_muls(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1: /* FDIV */
gen_helper_vfp_divs(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x2: /* FADD */
gen_helper_vfp_adds(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x3: /* FSUB */
gen_helper_vfp_subs(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x4: /* FMAX */
gen_helper_vfp_maxs(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x5: /* FMIN */
gen_helper_vfp_mins(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x6: /* FMAXNM */
gen_helper_vfp_maxnums(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x7: /* FMINNM */
gen_helper_vfp_minnums(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x8: /* FNMUL */
gen_helper_vfp_muls(tcg_res, tcg_op1, tcg_op2, fpst);
gen_helper_vfp_negs(tcg_res, tcg_res);
break;
}
write_fp_sreg(s, rd, tcg_res);
}
/* Floating-point data-processing (2 source) - double precision */
static void handle_fp_2src_double(DisasContext *s, int opcode,
int rd, int rn, int rm)
{
TCGv_i64 tcg_op1;
TCGv_i64 tcg_op2;
TCGv_i64 tcg_res;
TCGv_ptr fpst;
tcg_res = tcg_temp_new_i64();
fpst = fpstatus_ptr(FPST_FPCR);
tcg_op1 = read_fp_dreg(s, rn);
tcg_op2 = read_fp_dreg(s, rm);
switch (opcode) {
case 0x0: /* FMUL */
gen_helper_vfp_muld(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1: /* FDIV */
gen_helper_vfp_divd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x2: /* FADD */
gen_helper_vfp_addd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x3: /* FSUB */
gen_helper_vfp_subd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x4: /* FMAX */
gen_helper_vfp_maxd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x5: /* FMIN */
gen_helper_vfp_mind(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x6: /* FMAXNM */
gen_helper_vfp_maxnumd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x7: /* FMINNM */
gen_helper_vfp_minnumd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x8: /* FNMUL */
gen_helper_vfp_muld(tcg_res, tcg_op1, tcg_op2, fpst);
gen_helper_vfp_negd(tcg_res, tcg_res);
break;
}
write_fp_dreg(s, rd, tcg_res);
}
/* Floating-point data-processing (2 source) - half precision */
static void handle_fp_2src_half(DisasContext *s, int opcode,
int rd, int rn, int rm)
{
TCGv_i32 tcg_op1;
TCGv_i32 tcg_op2;
TCGv_i32 tcg_res;
TCGv_ptr fpst;
tcg_res = tcg_temp_new_i32();
fpst = fpstatus_ptr(FPST_FPCR_F16);
tcg_op1 = read_fp_hreg(s, rn);
tcg_op2 = read_fp_hreg(s, rm);
switch (opcode) {
case 0x0: /* FMUL */
gen_helper_advsimd_mulh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1: /* FDIV */
gen_helper_advsimd_divh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x2: /* FADD */
gen_helper_advsimd_addh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x3: /* FSUB */
gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x4: /* FMAX */
gen_helper_advsimd_maxh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x5: /* FMIN */
gen_helper_advsimd_minh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x6: /* FMAXNM */
gen_helper_advsimd_maxnumh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x7: /* FMINNM */
gen_helper_advsimd_minnumh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x8: /* FNMUL */
gen_helper_advsimd_mulh(tcg_res, tcg_op1, tcg_op2, fpst);
tcg_gen_xori_i32(tcg_res, tcg_res, 0x8000);
break;
default:
g_assert_not_reached();
}
write_fp_sreg(s, rd, tcg_res);
}
/* Floating point data-processing (2 source)
* 31 30 29 28 24 23 22 21 20 16 15 12 11 10 9 5 4 0
* +---+---+---+-----------+------+---+------+--------+-----+------+------+
* | M | 0 | S | 1 1 1 1 0 | type | 1 | Rm | opcode | 1 0 | Rn | Rd |
* +---+---+---+-----------+------+---+------+--------+-----+------+------+
*/
static void disas_fp_2src(DisasContext *s, uint32_t insn)
{
int mos = extract32(insn, 29, 3);
int type = extract32(insn, 22, 2);
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int rm = extract32(insn, 16, 5);
int opcode = extract32(insn, 12, 4);
if (opcode > 8 || mos) {
unallocated_encoding(s);
return;
}
switch (type) {
case 0:
if (!fp_access_check(s)) {
return;
}
handle_fp_2src_single(s, opcode, rd, rn, rm);
break;
case 1:
if (!fp_access_check(s)) {
return;
}
handle_fp_2src_double(s, opcode, rd, rn, rm);
break;
case 3:
if (!dc_isar_feature(aa64_fp16, s)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_fp_2src_half(s, opcode, rd, rn, rm);
break;
default:
unallocated_encoding(s);
}
}
/* Floating-point data-processing (3 source) - single precision */
static void handle_fp_3src_single(DisasContext *s, bool o0, bool o1,
int rd, int rn, int rm, int ra)
{
TCGv_i32 tcg_op1, tcg_op2, tcg_op3;
TCGv_i32 tcg_res = tcg_temp_new_i32();
TCGv_ptr fpst = fpstatus_ptr(FPST_FPCR);
tcg_op1 = read_fp_sreg(s, rn);
tcg_op2 = read_fp_sreg(s, rm);
tcg_op3 = read_fp_sreg(s, ra);
/* These are fused multiply-add, and must be done as one
* floating point operation with no rounding between the
* multiplication and addition steps.
* NB that doing the negations here as separate steps is
* correct : an input NaN should come out with its sign bit
* flipped if it is a negated-input.
*/
if (o1 == true) {
gen_helper_vfp_negs(tcg_op3, tcg_op3);
}
if (o0 != o1) {
gen_helper_vfp_negs(tcg_op1, tcg_op1);
}
gen_helper_vfp_muladds(tcg_res, tcg_op1, tcg_op2, tcg_op3, fpst);
write_fp_sreg(s, rd, tcg_res);
}
/* Floating-point data-processing (3 source) - double precision */
static void handle_fp_3src_double(DisasContext *s, bool o0, bool o1,
int rd, int rn, int rm, int ra)
{
TCGv_i64 tcg_op1, tcg_op2, tcg_op3;
TCGv_i64 tcg_res = tcg_temp_new_i64();
TCGv_ptr fpst = fpstatus_ptr(FPST_FPCR);
tcg_op1 = read_fp_dreg(s, rn);
tcg_op2 = read_fp_dreg(s, rm);
tcg_op3 = read_fp_dreg(s, ra);
/* These are fused multiply-add, and must be done as one
* floating point operation with no rounding between the
* multiplication and addition steps.
* NB that doing the negations here as separate steps is
* correct : an input NaN should come out with its sign bit
* flipped if it is a negated-input.
*/
if (o1 == true) {
gen_helper_vfp_negd(tcg_op3, tcg_op3);
}
if (o0 != o1) {
gen_helper_vfp_negd(tcg_op1, tcg_op1);
}
gen_helper_vfp_muladdd(tcg_res, tcg_op1, tcg_op2, tcg_op3, fpst);
write_fp_dreg(s, rd, tcg_res);
}
/* Floating-point data-processing (3 source) - half precision */
static void handle_fp_3src_half(DisasContext *s, bool o0, bool o1,
int rd, int rn, int rm, int ra)
{
TCGv_i32 tcg_op1, tcg_op2, tcg_op3;
TCGv_i32 tcg_res = tcg_temp_new_i32();
TCGv_ptr fpst = fpstatus_ptr(FPST_FPCR_F16);
tcg_op1 = read_fp_hreg(s, rn);
tcg_op2 = read_fp_hreg(s, rm);
tcg_op3 = read_fp_hreg(s, ra);
/* These are fused multiply-add, and must be done as one
* floating point operation with no rounding between the
* multiplication and addition steps.
* NB that doing the negations here as separate steps is
* correct : an input NaN should come out with its sign bit
* flipped if it is a negated-input.
*/
if (o1 == true) {
tcg_gen_xori_i32(tcg_op3, tcg_op3, 0x8000);
}
if (o0 != o1) {
tcg_gen_xori_i32(tcg_op1, tcg_op1, 0x8000);
}
gen_helper_advsimd_muladdh(tcg_res, tcg_op1, tcg_op2, tcg_op3, fpst);
write_fp_sreg(s, rd, tcg_res);
}
/* Floating point data-processing (3 source)
* 31 30 29 28 24 23 22 21 20 16 15 14 10 9 5 4 0
* +---+---+---+-----------+------+----+------+----+------+------+------+
* | M | 0 | S | 1 1 1 1 1 | type | o1 | Rm | o0 | Ra | Rn | Rd |
* +---+---+---+-----------+------+----+------+----+------+------+------+
*/
static void disas_fp_3src(DisasContext *s, uint32_t insn)
{
int mos = extract32(insn, 29, 3);
int type = extract32(insn, 22, 2);
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int ra = extract32(insn, 10, 5);
int rm = extract32(insn, 16, 5);
bool o0 = extract32(insn, 15, 1);
bool o1 = extract32(insn, 21, 1);
if (mos) {
unallocated_encoding(s);
return;
}
switch (type) {
case 0:
if (!fp_access_check(s)) {
return;
}
handle_fp_3src_single(s, o0, o1, rd, rn, rm, ra);
break;
case 1:
if (!fp_access_check(s)) {
return;
}
handle_fp_3src_double(s, o0, o1, rd, rn, rm, ra);
break;
case 3:
if (!dc_isar_feature(aa64_fp16, s)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_fp_3src_half(s, o0, o1, rd, rn, rm, ra);
break;
default:
unallocated_encoding(s);
}
}
/* Floating point immediate
* 31 30 29 28 24 23 22 21 20 13 12 10 9 5 4 0
* +---+---+---+-----------+------+---+------------+-------+------+------+
* | M | 0 | S | 1 1 1 1 0 | type | 1 | imm8 | 1 0 0 | imm5 | Rd |
* +---+---+---+-----------+------+---+------------+-------+------+------+
*/
static void disas_fp_imm(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int imm5 = extract32(insn, 5, 5);
int imm8 = extract32(insn, 13, 8);
int type = extract32(insn, 22, 2);
int mos = extract32(insn, 29, 3);
uint64_t imm;
MemOp sz;
if (mos || imm5) {
unallocated_encoding(s);
return;
}
switch (type) {
case 0:
sz = MO_32;
break;
case 1:
sz = MO_64;
break;
case 3:
sz = MO_16;
if (dc_isar_feature(aa64_fp16, s)) {
break;
}
/* fallthru */
default:
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
imm = vfp_expand_imm(sz, imm8);
write_fp_dreg(s, rd, tcg_constant_i64(imm));
}
/* Handle floating point <=> fixed point conversions. Note that we can
* also deal with fp <=> integer conversions as a special case (scale == 64)
* OPTME: consider handling that special case specially or at least skipping
* the call to scalbn in the helpers for zero shifts.
*/
static void handle_fpfpcvt(DisasContext *s, int rd, int rn, int opcode,
bool itof, int rmode, int scale, int sf, int type)
{
bool is_signed = !(opcode & 1);
TCGv_ptr tcg_fpstatus;
TCGv_i32 tcg_shift, tcg_single;
TCGv_i64 tcg_double;
tcg_fpstatus = fpstatus_ptr(type == 3 ? FPST_FPCR_F16 : FPST_FPCR);
tcg_shift = tcg_constant_i32(64 - scale);
if (itof) {
TCGv_i64 tcg_int = cpu_reg(s, rn);
if (!sf) {
TCGv_i64 tcg_extend = tcg_temp_new_i64();
if (is_signed) {
tcg_gen_ext32s_i64(tcg_extend, tcg_int);
} else {
tcg_gen_ext32u_i64(tcg_extend, tcg_int);
}
tcg_int = tcg_extend;
}
switch (type) {
case 1: /* float64 */
tcg_double = tcg_temp_new_i64();
if (is_signed) {
gen_helper_vfp_sqtod(tcg_double, tcg_int,
tcg_shift, tcg_fpstatus);
} else {
gen_helper_vfp_uqtod(tcg_double, tcg_int,
tcg_shift, tcg_fpstatus);
}
write_fp_dreg(s, rd, tcg_double);
break;
case 0: /* float32 */
tcg_single = tcg_temp_new_i32();
if (is_signed) {
gen_helper_vfp_sqtos(tcg_single, tcg_int,
tcg_shift, tcg_fpstatus);
} else {
gen_helper_vfp_uqtos(tcg_single, tcg_int,
tcg_shift, tcg_fpstatus);
}
write_fp_sreg(s, rd, tcg_single);
break;
case 3: /* float16 */
tcg_single = tcg_temp_new_i32();
if (is_signed) {
gen_helper_vfp_sqtoh(tcg_single, tcg_int,
tcg_shift, tcg_fpstatus);
} else {
gen_helper_vfp_uqtoh(tcg_single, tcg_int,
tcg_shift, tcg_fpstatus);
}
write_fp_sreg(s, rd, tcg_single);
break;
default:
g_assert_not_reached();
}
} else {
TCGv_i64 tcg_int = cpu_reg(s, rd);
TCGv_i32 tcg_rmode;
if (extract32(opcode, 2, 1)) {
/* There are too many rounding modes to all fit into rmode,
* so FCVTA[US] is a special case.
*/
rmode = FPROUNDING_TIEAWAY;
}
tcg_rmode = gen_set_rmode(rmode, tcg_fpstatus);
switch (type) {
case 1: /* float64 */
tcg_double = read_fp_dreg(s, rn);
if (is_signed) {
if (!sf) {
gen_helper_vfp_tosld(tcg_int, tcg_double,
tcg_shift, tcg_fpstatus);
} else {
gen_helper_vfp_tosqd(tcg_int, tcg_double,
tcg_shift, tcg_fpstatus);
}
} else {
if (!sf) {
gen_helper_vfp_tould(tcg_int, tcg_double,
tcg_shift, tcg_fpstatus);
} else {
gen_helper_vfp_touqd(tcg_int, tcg_double,
tcg_shift, tcg_fpstatus);
}
}
if (!sf) {
tcg_gen_ext32u_i64(tcg_int, tcg_int);
}
break;
case 0: /* float32 */
tcg_single = read_fp_sreg(s, rn);
if (sf) {
if (is_signed) {
gen_helper_vfp_tosqs(tcg_int, tcg_single,
tcg_shift, tcg_fpstatus);
} else {
gen_helper_vfp_touqs(tcg_int, tcg_single,
tcg_shift, tcg_fpstatus);
}
} else {
TCGv_i32 tcg_dest = tcg_temp_new_i32();
if (is_signed) {
gen_helper_vfp_tosls(tcg_dest, tcg_single,
tcg_shift, tcg_fpstatus);
} else {
gen_helper_vfp_touls(tcg_dest, tcg_single,
tcg_shift, tcg_fpstatus);
}
tcg_gen_extu_i32_i64(tcg_int, tcg_dest);
}
break;
case 3: /* float16 */
tcg_single = read_fp_sreg(s, rn);
if (sf) {
if (is_signed) {
gen_helper_vfp_tosqh(tcg_int, tcg_single,
tcg_shift, tcg_fpstatus);
} else {
gen_helper_vfp_touqh(tcg_int, tcg_single,
tcg_shift, tcg_fpstatus);
}
} else {
TCGv_i32 tcg_dest = tcg_temp_new_i32();
if (is_signed) {
gen_helper_vfp_toslh(tcg_dest, tcg_single,
tcg_shift, tcg_fpstatus);
} else {
gen_helper_vfp_toulh(tcg_dest, tcg_single,
tcg_shift, tcg_fpstatus);
}
tcg_gen_extu_i32_i64(tcg_int, tcg_dest);
}
break;
default:
g_assert_not_reached();
}
gen_restore_rmode(tcg_rmode, tcg_fpstatus);
}
}
/* Floating point <-> fixed point conversions
* 31 30 29 28 24 23 22 21 20 19 18 16 15 10 9 5 4 0
* +----+---+---+-----------+------+---+-------+--------+-------+------+------+
* | sf | 0 | S | 1 1 1 1 0 | type | 0 | rmode | opcode | scale | Rn | Rd |
* +----+---+---+-----------+------+---+-------+--------+-------+------+------+
*/
static void disas_fp_fixed_conv(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int scale = extract32(insn, 10, 6);
int opcode = extract32(insn, 16, 3);
int rmode = extract32(insn, 19, 2);
int type = extract32(insn, 22, 2);
bool sbit = extract32(insn, 29, 1);
bool sf = extract32(insn, 31, 1);
bool itof;
if (sbit || (!sf && scale < 32)) {
unallocated_encoding(s);
return;
}
switch (type) {
case 0: /* float32 */
case 1: /* float64 */
break;
case 3: /* float16 */
if (dc_isar_feature(aa64_fp16, s)) {
break;
}
/* fallthru */
default:
unallocated_encoding(s);
return;
}
switch ((rmode << 3) | opcode) {
case 0x2: /* SCVTF */
case 0x3: /* UCVTF */
itof = true;
break;
case 0x18: /* FCVTZS */
case 0x19: /* FCVTZU */
itof = false;
break;
default:
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_fpfpcvt(s, rd, rn, opcode, itof, FPROUNDING_ZERO, scale, sf, type);
}
static void handle_fmov(DisasContext *s, int rd, int rn, int type, bool itof)
{
/* FMOV: gpr to or from float, double, or top half of quad fp reg,
* without conversion.
*/
if (itof) {
TCGv_i64 tcg_rn = cpu_reg(s, rn);
TCGv_i64 tmp;
switch (type) {
case 0:
/* 32 bit */
tmp = tcg_temp_new_i64();
tcg_gen_ext32u_i64(tmp, tcg_rn);
write_fp_dreg(s, rd, tmp);
break;
case 1:
/* 64 bit */
write_fp_dreg(s, rd, tcg_rn);
break;
case 2:
/* 64 bit to top half. */
tcg_gen_st_i64(tcg_rn, tcg_env, fp_reg_hi_offset(s, rd));
clear_vec_high(s, true, rd);
break;
case 3:
/* 16 bit */
tmp = tcg_temp_new_i64();
tcg_gen_ext16u_i64(tmp, tcg_rn);
write_fp_dreg(s, rd, tmp);
break;
default:
g_assert_not_reached();
}
} else {
TCGv_i64 tcg_rd = cpu_reg(s, rd);
switch (type) {
case 0:
/* 32 bit */
tcg_gen_ld32u_i64(tcg_rd, tcg_env, fp_reg_offset(s, rn, MO_32));
break;
case 1:
/* 64 bit */
tcg_gen_ld_i64(tcg_rd, tcg_env, fp_reg_offset(s, rn, MO_64));
break;
case 2:
/* 64 bits from top half */
tcg_gen_ld_i64(tcg_rd, tcg_env, fp_reg_hi_offset(s, rn));
break;
case 3:
/* 16 bit */
tcg_gen_ld16u_i64(tcg_rd, tcg_env, fp_reg_offset(s, rn, MO_16));
break;
default:
g_assert_not_reached();
}
}
}
static void handle_fjcvtzs(DisasContext *s, int rd, int rn)
{
TCGv_i64 t = read_fp_dreg(s, rn);
TCGv_ptr fpstatus = fpstatus_ptr(FPST_FPCR);
gen_helper_fjcvtzs(t, t, fpstatus);
tcg_gen_ext32u_i64(cpu_reg(s, rd), t);
tcg_gen_extrh_i64_i32(cpu_ZF, t);
tcg_gen_movi_i32(cpu_CF, 0);
tcg_gen_movi_i32(cpu_NF, 0);
tcg_gen_movi_i32(cpu_VF, 0);
}
/* Floating point <-> integer conversions
* 31 30 29 28 24 23 22 21 20 19 18 16 15 10 9 5 4 0
* +----+---+---+-----------+------+---+-------+-----+-------------+----+----+
* | sf | 0 | S | 1 1 1 1 0 | type | 1 | rmode | opc | 0 0 0 0 0 0 | Rn | Rd |
* +----+---+---+-----------+------+---+-------+-----+-------------+----+----+
*/
static void disas_fp_int_conv(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int opcode = extract32(insn, 16, 3);
int rmode = extract32(insn, 19, 2);
int type = extract32(insn, 22, 2);
bool sbit = extract32(insn, 29, 1);
bool sf = extract32(insn, 31, 1);
bool itof = false;
if (sbit) {
goto do_unallocated;
}
switch (opcode) {
case 2: /* SCVTF */
case 3: /* UCVTF */
itof = true;
/* fallthru */
case 4: /* FCVTAS */
case 5: /* FCVTAU */
if (rmode != 0) {
goto do_unallocated;
}
/* fallthru */
case 0: /* FCVT[NPMZ]S */
case 1: /* FCVT[NPMZ]U */
switch (type) {
case 0: /* float32 */
case 1: /* float64 */
break;
case 3: /* float16 */
if (!dc_isar_feature(aa64_fp16, s)) {
goto do_unallocated;
}
break;
default:
goto do_unallocated;
}
if (!fp_access_check(s)) {
return;
}
handle_fpfpcvt(s, rd, rn, opcode, itof, rmode, 64, sf, type);
break;
default:
switch (sf << 7 | type << 5 | rmode << 3 | opcode) {
case 0b01100110: /* FMOV half <-> 32-bit int */
case 0b01100111:
case 0b11100110: /* FMOV half <-> 64-bit int */
case 0b11100111:
if (!dc_isar_feature(aa64_fp16, s)) {
goto do_unallocated;
}
/* fallthru */
case 0b00000110: /* FMOV 32-bit */
case 0b00000111:
case 0b10100110: /* FMOV 64-bit */
case 0b10100111:
case 0b11001110: /* FMOV top half of 128-bit */
case 0b11001111:
if (!fp_access_check(s)) {
return;
}
itof = opcode & 1;
handle_fmov(s, rd, rn, type, itof);
break;
case 0b00111110: /* FJCVTZS */
if (!dc_isar_feature(aa64_jscvt, s)) {
goto do_unallocated;
} else if (fp_access_check(s)) {
handle_fjcvtzs(s, rd, rn);
}
break;
default:
do_unallocated:
unallocated_encoding(s);
return;
}
break;
}
}
/* FP-specific subcases of table C3-6 (SIMD and FP data processing)
* 31 30 29 28 25 24 0
* +---+---+---+---------+-----------------------------+
* | | 0 | | 1 1 1 1 | |
* +---+---+---+---------+-----------------------------+
*/
static void disas_data_proc_fp(DisasContext *s, uint32_t insn)
{
if (extract32(insn, 24, 1)) {
/* Floating point data-processing (3 source) */
disas_fp_3src(s, insn);
} else if (extract32(insn, 21, 1) == 0) {
/* Floating point to fixed point conversions */
disas_fp_fixed_conv(s, insn);
} else {
switch (extract32(insn, 10, 2)) {
case 1:
/* Floating point conditional compare */
disas_fp_ccomp(s, insn);
break;
case 2:
/* Floating point data-processing (2 source) */
disas_fp_2src(s, insn);
break;
case 3:
/* Floating point conditional select */
disas_fp_csel(s, insn);
break;
case 0:
switch (ctz32(extract32(insn, 12, 4))) {
case 0: /* [15:12] == xxx1 */
/* Floating point immediate */
disas_fp_imm(s, insn);
break;
case 1: /* [15:12] == xx10 */
/* Floating point compare */
disas_fp_compare(s, insn);
break;
case 2: /* [15:12] == x100 */
/* Floating point data-processing (1 source) */
disas_fp_1src(s, insn);
break;
case 3: /* [15:12] == 1000 */
unallocated_encoding(s);
break;
default: /* [15:12] == 0000 */
/* Floating point <-> integer conversions */
disas_fp_int_conv(s, insn);
break;
}
break;
}
}
}
static void do_ext64(DisasContext *s, TCGv_i64 tcg_left, TCGv_i64 tcg_right,
int pos)
{
/* Extract 64 bits from the middle of two concatenated 64 bit
* vector register slices left:right. The extracted bits start
* at 'pos' bits into the right (least significant) side.
* We return the result in tcg_right, and guarantee not to
* trash tcg_left.
*/
TCGv_i64 tcg_tmp = tcg_temp_new_i64();
assert(pos > 0 && pos < 64);
tcg_gen_shri_i64(tcg_right, tcg_right, pos);
tcg_gen_shli_i64(tcg_tmp, tcg_left, 64 - pos);
tcg_gen_or_i64(tcg_right, tcg_right, tcg_tmp);
}
/* EXT
* 31 30 29 24 23 22 21 20 16 15 14 11 10 9 5 4 0
* +---+---+-------------+-----+---+------+---+------+---+------+------+
* | 0 | Q | 1 0 1 1 1 0 | op2 | 0 | Rm | 0 | imm4 | 0 | Rn | Rd |
* +---+---+-------------+-----+---+------+---+------+---+------+------+
*/
static void disas_simd_ext(DisasContext *s, uint32_t insn)
{
int is_q = extract32(insn, 30, 1);
int op2 = extract32(insn, 22, 2);
int imm4 = extract32(insn, 11, 4);
int rm = extract32(insn, 16, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
int pos = imm4 << 3;
TCGv_i64 tcg_resl, tcg_resh;
if (op2 != 0 || (!is_q && extract32(imm4, 3, 1))) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
tcg_resh = tcg_temp_new_i64();
tcg_resl = tcg_temp_new_i64();
/* Vd gets bits starting at pos bits into Vm:Vn. This is
* either extracting 128 bits from a 128:128 concatenation, or
* extracting 64 bits from a 64:64 concatenation.
*/
if (!is_q) {
read_vec_element(s, tcg_resl, rn, 0, MO_64);
if (pos != 0) {
read_vec_element(s, tcg_resh, rm, 0, MO_64);
do_ext64(s, tcg_resh, tcg_resl, pos);
}
} else {
TCGv_i64 tcg_hh;
typedef struct {
int reg;
int elt;
} EltPosns;
EltPosns eltposns[] = { {rn, 0}, {rn, 1}, {rm, 0}, {rm, 1} };
EltPosns *elt = eltposns;
if (pos >= 64) {
elt++;
pos -= 64;
}
read_vec_element(s, tcg_resl, elt->reg, elt->elt, MO_64);
elt++;
read_vec_element(s, tcg_resh, elt->reg, elt->elt, MO_64);
elt++;
if (pos != 0) {
do_ext64(s, tcg_resh, tcg_resl, pos);
tcg_hh = tcg_temp_new_i64();
read_vec_element(s, tcg_hh, elt->reg, elt->elt, MO_64);
do_ext64(s, tcg_hh, tcg_resh, pos);
}
}
write_vec_element(s, tcg_resl, rd, 0, MO_64);
if (is_q) {
write_vec_element(s, tcg_resh, rd, 1, MO_64);
}
clear_vec_high(s, is_q, rd);
}
/* TBL/TBX
* 31 30 29 24 23 22 21 20 16 15 14 13 12 11 10 9 5 4 0
* +---+---+-------------+-----+---+------+---+-----+----+-----+------+------+
* | 0 | Q | 0 0 1 1 1 0 | op2 | 0 | Rm | 0 | len | op | 0 0 | Rn | Rd |
* +---+---+-------------+-----+---+------+---+-----+----+-----+------+------+
*/
static void disas_simd_tb(DisasContext *s, uint32_t insn)
{
int op2 = extract32(insn, 22, 2);
int is_q = extract32(insn, 30, 1);
int rm = extract32(insn, 16, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
int is_tbx = extract32(insn, 12, 1);
int len = (extract32(insn, 13, 2) + 1) * 16;
if (op2 != 0) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
tcg_gen_gvec_2_ptr(vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rm), tcg_env,
is_q ? 16 : 8, vec_full_reg_size(s),
(len << 6) | (is_tbx << 5) | rn,
gen_helper_simd_tblx);
}
/* ZIP/UZP/TRN
* 31 30 29 24 23 22 21 20 16 15 14 12 11 10 9 5 4 0
* +---+---+-------------+------+---+------+---+------------------+------+
* | 0 | Q | 0 0 1 1 1 0 | size | 0 | Rm | 0 | opc | 1 0 | Rn | Rd |
* +---+---+-------------+------+---+------+---+------------------+------+
*/
static void disas_simd_zip_trn(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int rm = extract32(insn, 16, 5);
int size = extract32(insn, 22, 2);
/* opc field bits [1:0] indicate ZIP/UZP/TRN;
* bit 2 indicates 1 vs 2 variant of the insn.
*/
int opcode = extract32(insn, 12, 2);
bool part = extract32(insn, 14, 1);
bool is_q = extract32(insn, 30, 1);
int esize = 8 << size;
int i;
int datasize = is_q ? 128 : 64;
int elements = datasize / esize;
TCGv_i64 tcg_res[2], tcg_ele;
if (opcode == 0 || (size == 3 && !is_q)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
tcg_res[0] = tcg_temp_new_i64();
tcg_res[1] = is_q ? tcg_temp_new_i64() : NULL;
tcg_ele = tcg_temp_new_i64();
for (i = 0; i < elements; i++) {
int o, w;
switch (opcode) {
case 1: /* UZP1/2 */
{
int midpoint = elements / 2;
if (i < midpoint) {
read_vec_element(s, tcg_ele, rn, 2 * i + part, size);
} else {
read_vec_element(s, tcg_ele, rm,
2 * (i - midpoint) + part, size);
}
break;
}
case 2: /* TRN1/2 */
if (i & 1) {
read_vec_element(s, tcg_ele, rm, (i & ~1) + part, size);
} else {
read_vec_element(s, tcg_ele, rn, (i & ~1) + part, size);
}
break;
case 3: /* ZIP1/2 */
{
int base = part * elements / 2;
if (i & 1) {
read_vec_element(s, tcg_ele, rm, base + (i >> 1), size);
} else {
read_vec_element(s, tcg_ele, rn, base + (i >> 1), size);
}
break;
}
default:
g_assert_not_reached();
}
w = (i * esize) / 64;
o = (i * esize) % 64;
if (o == 0) {
tcg_gen_mov_i64(tcg_res[w], tcg_ele);
} else {
tcg_gen_shli_i64(tcg_ele, tcg_ele, o);
tcg_gen_or_i64(tcg_res[w], tcg_res[w], tcg_ele);
}
}
for (i = 0; i <= is_q; ++i) {
write_vec_element(s, tcg_res[i], rd, i, MO_64);
}
clear_vec_high(s, is_q, rd);
}
/*
* do_reduction_op helper
*
* This mirrors the Reduce() pseudocode in the ARM ARM. It is
* important for correct NaN propagation that we do these
* operations in exactly the order specified by the pseudocode.
*
* This is a recursive function, TCG temps should be freed by the
* calling function once it is done with the values.
*/
static TCGv_i32 do_reduction_op(DisasContext *s, int fpopcode, int rn,
int esize, int size, int vmap, TCGv_ptr fpst)
{
if (esize == size) {
int element;
MemOp msize = esize == 16 ? MO_16 : MO_32;
TCGv_i32 tcg_elem;
/* We should have one register left here */
assert(ctpop8(vmap) == 1);
element = ctz32(vmap);
assert(element < 8);
tcg_elem = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_elem, rn, element, msize);
return tcg_elem;
} else {
int bits = size / 2;
int shift = ctpop8(vmap) / 2;
int vmap_lo = (vmap >> shift) & vmap;
int vmap_hi = (vmap & ~vmap_lo);
TCGv_i32 tcg_hi, tcg_lo, tcg_res;
tcg_hi = do_reduction_op(s, fpopcode, rn, esize, bits, vmap_hi, fpst);
tcg_lo = do_reduction_op(s, fpopcode, rn, esize, bits, vmap_lo, fpst);
tcg_res = tcg_temp_new_i32();
switch (fpopcode) {
case 0x0c: /* fmaxnmv half-precision */
gen_helper_advsimd_maxnumh(tcg_res, tcg_lo, tcg_hi, fpst);
break;
case 0x0f: /* fmaxv half-precision */
gen_helper_advsimd_maxh(tcg_res, tcg_lo, tcg_hi, fpst);
break;
case 0x1c: /* fminnmv half-precision */
gen_helper_advsimd_minnumh(tcg_res, tcg_lo, tcg_hi, fpst);
break;
case 0x1f: /* fminv half-precision */
gen_helper_advsimd_minh(tcg_res, tcg_lo, tcg_hi, fpst);
break;
case 0x2c: /* fmaxnmv */
gen_helper_vfp_maxnums(tcg_res, tcg_lo, tcg_hi, fpst);
break;
case 0x2f: /* fmaxv */
gen_helper_vfp_maxs(tcg_res, tcg_lo, tcg_hi, fpst);
break;
case 0x3c: /* fminnmv */
gen_helper_vfp_minnums(tcg_res, tcg_lo, tcg_hi, fpst);
break;
case 0x3f: /* fminv */
gen_helper_vfp_mins(tcg_res, tcg_lo, tcg_hi, fpst);
break;
default:
g_assert_not_reached();
}
return tcg_res;
}
}
/* AdvSIMD across lanes
* 31 30 29 28 24 23 22 21 17 16 12 11 10 9 5 4 0
* +---+---+---+-----------+------+-----------+--------+-----+------+------+
* | 0 | Q | U | 0 1 1 1 0 | size | 1 1 0 0 0 | opcode | 1 0 | Rn | Rd |
* +---+---+---+-----------+------+-----------+--------+-----+------+------+
*/
static void disas_simd_across_lanes(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int size = extract32(insn, 22, 2);
int opcode = extract32(insn, 12, 5);
bool is_q = extract32(insn, 30, 1);
bool is_u = extract32(insn, 29, 1);
bool is_fp = false;
bool is_min = false;
int esize;
int elements;
int i;
TCGv_i64 tcg_res, tcg_elt;
switch (opcode) {
case 0x1b: /* ADDV */
if (is_u) {
unallocated_encoding(s);
return;
}
/* fall through */
case 0x3: /* SADDLV, UADDLV */
case 0xa: /* SMAXV, UMAXV */
case 0x1a: /* SMINV, UMINV */
if (size == 3 || (size == 2 && !is_q)) {
unallocated_encoding(s);
return;
}
break;
case 0xc: /* FMAXNMV, FMINNMV */
case 0xf: /* FMAXV, FMINV */
/* Bit 1 of size field encodes min vs max and the actual size
* depends on the encoding of the U bit. If not set (and FP16
* enabled) then we do half-precision float instead of single
* precision.
*/
is_min = extract32(size, 1, 1);
is_fp = true;
if (!is_u && dc_isar_feature(aa64_fp16, s)) {
size = 1;
} else if (!is_u || !is_q || extract32(size, 0, 1)) {
unallocated_encoding(s);
return;
} else {
size = 2;
}
break;
default:
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
esize = 8 << size;
elements = (is_q ? 128 : 64) / esize;
tcg_res = tcg_temp_new_i64();
tcg_elt = tcg_temp_new_i64();
/* These instructions operate across all lanes of a vector
* to produce a single result. We can guarantee that a 64
* bit intermediate is sufficient:
* + for [US]ADDLV the maximum element size is 32 bits, and
* the result type is 64 bits
* + for FMAX*V, FMIN*V, ADDV the intermediate type is the
* same as the element size, which is 32 bits at most
* For the integer operations we can choose to work at 64
* or 32 bits and truncate at the end; for simplicity
* we use 64 bits always. The floating point
* ops do require 32 bit intermediates, though.
*/
if (!is_fp) {
read_vec_element(s, tcg_res, rn, 0, size | (is_u ? 0 : MO_SIGN));
for (i = 1; i < elements; i++) {
read_vec_element(s, tcg_elt, rn, i, size | (is_u ? 0 : MO_SIGN));
switch (opcode) {
case 0x03: /* SADDLV / UADDLV */
case 0x1b: /* ADDV */
tcg_gen_add_i64(tcg_res, tcg_res, tcg_elt);
break;
case 0x0a: /* SMAXV / UMAXV */
if (is_u) {
tcg_gen_umax_i64(tcg_res, tcg_res, tcg_elt);
} else {
tcg_gen_smax_i64(tcg_res, tcg_res, tcg_elt);
}
break;
case 0x1a: /* SMINV / UMINV */
if (is_u) {
tcg_gen_umin_i64(tcg_res, tcg_res, tcg_elt);
} else {
tcg_gen_smin_i64(tcg_res, tcg_res, tcg_elt);
}
break;
default:
g_assert_not_reached();
}
}
} else {
/* Floating point vector reduction ops which work across 32
* bit (single) or 16 bit (half-precision) intermediates.
* Note that correct NaN propagation requires that we do these
* operations in exactly the order specified by the pseudocode.
*/
TCGv_ptr fpst = fpstatus_ptr(size == MO_16 ? FPST_FPCR_F16 : FPST_FPCR);
int fpopcode = opcode | is_min << 4 | is_u << 5;
int vmap = (1 << elements) - 1;
TCGv_i32 tcg_res32 = do_reduction_op(s, fpopcode, rn, esize,
(is_q ? 128 : 64), vmap, fpst);
tcg_gen_extu_i32_i64(tcg_res, tcg_res32);
}
/* Now truncate the result to the width required for the final output */
if (opcode == 0x03) {
/* SADDLV, UADDLV: result is 2*esize */
size++;
}
switch (size) {
case 0:
tcg_gen_ext8u_i64(tcg_res, tcg_res);
break;
case 1:
tcg_gen_ext16u_i64(tcg_res, tcg_res);
break;
case 2:
tcg_gen_ext32u_i64(tcg_res, tcg_res);
break;
case 3:
break;
default:
g_assert_not_reached();
}
write_fp_dreg(s, rd, tcg_res);
}
/* DUP (Element, Vector)
*
* 31 30 29 21 20 16 15 10 9 5 4 0
* +---+---+-------------------+--------+-------------+------+------+
* | 0 | Q | 0 0 1 1 1 0 0 0 0 | imm5 | 0 0 0 0 0 1 | Rn | Rd |
* +---+---+-------------------+--------+-------------+------+------+
*
* size: encoded in imm5 (see ARM ARM LowestSetBit())
*/
static void handle_simd_dupe(DisasContext *s, int is_q, int rd, int rn,
int imm5)
{
int size = ctz32(imm5);
int index;
if (size > 3 || (size == 3 && !is_q)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
index = imm5 >> (size + 1);
tcg_gen_gvec_dup_mem(size, vec_full_reg_offset(s, rd),
vec_reg_offset(s, rn, index, size),
is_q ? 16 : 8, vec_full_reg_size(s));
}
/* DUP (element, scalar)
* 31 21 20 16 15 10 9 5 4 0
* +-----------------------+--------+-------------+------+------+
* | 0 1 0 1 1 1 1 0 0 0 0 | imm5 | 0 0 0 0 0 1 | Rn | Rd |
* +-----------------------+--------+-------------+------+------+
*/
static void handle_simd_dupes(DisasContext *s, int rd, int rn,
int imm5)
{
int size = ctz32(imm5);
int index;
TCGv_i64 tmp;
if (size > 3) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
index = imm5 >> (size + 1);
/* This instruction just extracts the specified element and
* zero-extends it into the bottom of the destination register.
*/
tmp = tcg_temp_new_i64();
read_vec_element(s, tmp, rn, index, size);
write_fp_dreg(s, rd, tmp);
}
/* DUP (General)
*
* 31 30 29 21 20 16 15 10 9 5 4 0
* +---+---+-------------------+--------+-------------+------+------+
* | 0 | Q | 0 0 1 1 1 0 0 0 0 | imm5 | 0 0 0 0 1 1 | Rn | Rd |
* +---+---+-------------------+--------+-------------+------+------+
*
* size: encoded in imm5 (see ARM ARM LowestSetBit())
*/
static void handle_simd_dupg(DisasContext *s, int is_q, int rd, int rn,
int imm5)
{
int size = ctz32(imm5);
uint32_t dofs, oprsz, maxsz;
if (size > 3 || ((size == 3) && !is_q)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
dofs = vec_full_reg_offset(s, rd);
oprsz = is_q ? 16 : 8;
maxsz = vec_full_reg_size(s);
tcg_gen_gvec_dup_i64(size, dofs, oprsz, maxsz, cpu_reg(s, rn));
}
/* INS (Element)
*
* 31 21 20 16 15 14 11 10 9 5 4 0
* +-----------------------+--------+------------+---+------+------+
* | 0 1 1 0 1 1 1 0 0 0 0 | imm5 | 0 | imm4 | 1 | Rn | Rd |
* +-----------------------+--------+------------+---+------+------+
*
* size: encoded in imm5 (see ARM ARM LowestSetBit())
* index: encoded in imm5<4:size+1>
*/
static void handle_simd_inse(DisasContext *s, int rd, int rn,
int imm4, int imm5)
{
int size = ctz32(imm5);
int src_index, dst_index;
TCGv_i64 tmp;
if (size > 3) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
dst_index = extract32(imm5, 1+size, 5);
src_index = extract32(imm4, size, 4);
tmp = tcg_temp_new_i64();
read_vec_element(s, tmp, rn, src_index, size);
write_vec_element(s, tmp, rd, dst_index, size);
/* INS is considered a 128-bit write for SVE. */
clear_vec_high(s, true, rd);
}
/* INS (General)
*
* 31 21 20 16 15 10 9 5 4 0
* +-----------------------+--------+-------------+------+------+
* | 0 1 0 0 1 1 1 0 0 0 0 | imm5 | 0 0 0 1 1 1 | Rn | Rd |
* +-----------------------+--------+-------------+------+------+
*
* size: encoded in imm5 (see ARM ARM LowestSetBit())
* index: encoded in imm5<4:size+1>
*/
static void handle_simd_insg(DisasContext *s, int rd, int rn, int imm5)
{
int size = ctz32(imm5);
int idx;
if (size > 3) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
idx = extract32(imm5, 1 + size, 4 - size);
write_vec_element(s, cpu_reg(s, rn), rd, idx, size);
/* INS is considered a 128-bit write for SVE. */
clear_vec_high(s, true, rd);
}
/*
* UMOV (General)
* SMOV (General)
*
* 31 30 29 21 20 16 15 12 10 9 5 4 0
* +---+---+-------------------+--------+-------------+------+------+
* | 0 | Q | 0 0 1 1 1 0 0 0 0 | imm5 | 0 0 1 U 1 1 | Rn | Rd |
* +---+---+-------------------+--------+-------------+------+------+
*
* U: unsigned when set
* size: encoded in imm5 (see ARM ARM LowestSetBit())
*/
static void handle_simd_umov_smov(DisasContext *s, int is_q, int is_signed,
int rn, int rd, int imm5)
{
int size = ctz32(imm5);
int element;
TCGv_i64 tcg_rd;
/* Check for UnallocatedEncodings */
if (is_signed) {
if (size > 2 || (size == 2 && !is_q)) {
unallocated_encoding(s);
return;
}
} else {
if (size > 3
|| (size < 3 && is_q)
|| (size == 3 && !is_q)) {
unallocated_encoding(s);
return;
}
}
if (!fp_access_check(s)) {
return;
}
element = extract32(imm5, 1+size, 4);
tcg_rd = cpu_reg(s, rd);
read_vec_element(s, tcg_rd, rn, element, size | (is_signed ? MO_SIGN : 0));
if (is_signed && !is_q) {
tcg_gen_ext32u_i64(tcg_rd, tcg_rd);
}
}
/* AdvSIMD copy
* 31 30 29 28 21 20 16 15 14 11 10 9 5 4 0
* +---+---+----+-----------------+------+---+------+---+------+------+
* | 0 | Q | op | 0 1 1 1 0 0 0 0 | imm5 | 0 | imm4 | 1 | Rn | Rd |
* +---+---+----+-----------------+------+---+------+---+------+------+
*/
static void disas_simd_copy(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int imm4 = extract32(insn, 11, 4);
int op = extract32(insn, 29, 1);
int is_q = extract32(insn, 30, 1);
int imm5 = extract32(insn, 16, 5);
if (op) {
if (is_q) {
/* INS (element) */
handle_simd_inse(s, rd, rn, imm4, imm5);
} else {
unallocated_encoding(s);
}
} else {
switch (imm4) {
case 0:
/* DUP (element - vector) */
handle_simd_dupe(s, is_q, rd, rn, imm5);
break;
case 1:
/* DUP (general) */
handle_simd_dupg(s, is_q, rd, rn, imm5);
break;
case 3:
if (is_q) {
/* INS (general) */
handle_simd_insg(s, rd, rn, imm5);
} else {
unallocated_encoding(s);
}
break;
case 5:
case 7:
/* UMOV/SMOV (is_q indicates 32/64; imm4 indicates signedness) */
handle_simd_umov_smov(s, is_q, (imm4 == 5), rn, rd, imm5);
break;
default:
unallocated_encoding(s);
break;
}
}
}
/* AdvSIMD modified immediate
* 31 30 29 28 19 18 16 15 12 11 10 9 5 4 0
* +---+---+----+---------------------+-----+-------+----+---+-------+------+
* | 0 | Q | op | 0 1 1 1 1 0 0 0 0 0 | abc | cmode | o2 | 1 | defgh | Rd |
* +---+---+----+---------------------+-----+-------+----+---+-------+------+
*
* There are a number of operations that can be carried out here:
* MOVI - move (shifted) imm into register
* MVNI - move inverted (shifted) imm into register
* ORR - bitwise OR of (shifted) imm with register
* BIC - bitwise clear of (shifted) imm with register
* With ARMv8.2 we also have:
* FMOV half-precision
*/
static void disas_simd_mod_imm(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int cmode = extract32(insn, 12, 4);
int o2 = extract32(insn, 11, 1);
uint64_t abcdefgh = extract32(insn, 5, 5) | (extract32(insn, 16, 3) << 5);
bool is_neg = extract32(insn, 29, 1);
bool is_q = extract32(insn, 30, 1);
uint64_t imm = 0;
if (o2 != 0 || ((cmode == 0xf) && is_neg && !is_q)) {
/* Check for FMOV (vector, immediate) - half-precision */
if (!(dc_isar_feature(aa64_fp16, s) && o2 && cmode == 0xf)) {
unallocated_encoding(s);
return;
}
}
if (!fp_access_check(s)) {
return;
}
if (cmode == 15 && o2 && !is_neg) {
/* FMOV (vector, immediate) - half-precision */
imm = vfp_expand_imm(MO_16, abcdefgh);
/* now duplicate across the lanes */
imm = dup_const(MO_16, imm);
} else {
imm = asimd_imm_const(abcdefgh, cmode, is_neg);
}
if (!((cmode & 0x9) == 0x1 || (cmode & 0xd) == 0x9)) {
/* MOVI or MVNI, with MVNI negation handled above. */
tcg_gen_gvec_dup_imm(MO_64, vec_full_reg_offset(s, rd), is_q ? 16 : 8,
vec_full_reg_size(s), imm);
} else {
/* ORR or BIC, with BIC negation to AND handled above. */
if (is_neg) {
gen_gvec_fn2i(s, is_q, rd, rd, imm, tcg_gen_gvec_andi, MO_64);
} else {
gen_gvec_fn2i(s, is_q, rd, rd, imm, tcg_gen_gvec_ori, MO_64);
}
}
}
/* AdvSIMD scalar copy
* 31 30 29 28 21 20 16 15 14 11 10 9 5 4 0
* +-----+----+-----------------+------+---+------+---+------+------+
* | 0 1 | op | 1 1 1 1 0 0 0 0 | imm5 | 0 | imm4 | 1 | Rn | Rd |
* +-----+----+-----------------+------+---+------+---+------+------+
*/
static void disas_simd_scalar_copy(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int imm4 = extract32(insn, 11, 4);
int imm5 = extract32(insn, 16, 5);
int op = extract32(insn, 29, 1);
if (op != 0 || imm4 != 0) {
unallocated_encoding(s);
return;
}
/* DUP (element, scalar) */
handle_simd_dupes(s, rd, rn, imm5);
}
/* AdvSIMD scalar pairwise
* 31 30 29 28 24 23 22 21 17 16 12 11 10 9 5 4 0
* +-----+---+-----------+------+-----------+--------+-----+------+------+
* | 0 1 | U | 1 1 1 1 0 | size | 1 1 0 0 0 | opcode | 1 0 | Rn | Rd |
* +-----+---+-----------+------+-----------+--------+-----+------+------+
*/
static void disas_simd_scalar_pairwise(DisasContext *s, uint32_t insn)
{
int u = extract32(insn, 29, 1);
int size = extract32(insn, 22, 2);
int opcode = extract32(insn, 12, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
TCGv_ptr fpst;
/* For some ops (the FP ones), size[1] is part of the encoding.
* For ADDP strictly it is not but size[1] is always 1 for valid
* encodings.
*/
opcode |= (extract32(size, 1, 1) << 5);
switch (opcode) {
case 0x3b: /* ADDP */
if (u || size != 3) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
fpst = NULL;
break;
case 0xc: /* FMAXNMP */
case 0xd: /* FADDP */
case 0xf: /* FMAXP */
case 0x2c: /* FMINNMP */
case 0x2f: /* FMINP */
/* FP op, size[0] is 32 or 64 bit*/
if (!u) {
if (!dc_isar_feature(aa64_fp16, s)) {
unallocated_encoding(s);
return;
} else {
size = MO_16;
}
} else {
size = extract32(size, 0, 1) ? MO_64 : MO_32;
}
if (!fp_access_check(s)) {
return;
}
fpst = fpstatus_ptr(size == MO_16 ? FPST_FPCR_F16 : FPST_FPCR);
break;
default:
unallocated_encoding(s);
return;
}
if (size == MO_64) {
TCGv_i64 tcg_op1 = tcg_temp_new_i64();
TCGv_i64 tcg_op2 = tcg_temp_new_i64();
TCGv_i64 tcg_res = tcg_temp_new_i64();
read_vec_element(s, tcg_op1, rn, 0, MO_64);
read_vec_element(s, tcg_op2, rn, 1, MO_64);
switch (opcode) {
case 0x3b: /* ADDP */
tcg_gen_add_i64(tcg_res, tcg_op1, tcg_op2);
break;
case 0xc: /* FMAXNMP */
gen_helper_vfp_maxnumd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0xd: /* FADDP */
gen_helper_vfp_addd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0xf: /* FMAXP */
gen_helper_vfp_maxd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x2c: /* FMINNMP */
gen_helper_vfp_minnumd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x2f: /* FMINP */
gen_helper_vfp_mind(tcg_res, tcg_op1, tcg_op2, fpst);
break;
default:
g_assert_not_reached();
}
write_fp_dreg(s, rd, tcg_res);
} else {
TCGv_i32 tcg_op1 = tcg_temp_new_i32();
TCGv_i32 tcg_op2 = tcg_temp_new_i32();
TCGv_i32 tcg_res = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_op1, rn, 0, size);
read_vec_element_i32(s, tcg_op2, rn, 1, size);
if (size == MO_16) {
switch (opcode) {
case 0xc: /* FMAXNMP */
gen_helper_advsimd_maxnumh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0xd: /* FADDP */
gen_helper_advsimd_addh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0xf: /* FMAXP */
gen_helper_advsimd_maxh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x2c: /* FMINNMP */
gen_helper_advsimd_minnumh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x2f: /* FMINP */
gen_helper_advsimd_minh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
default:
g_assert_not_reached();
}
} else {
switch (opcode) {
case 0xc: /* FMAXNMP */
gen_helper_vfp_maxnums(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0xd: /* FADDP */
gen_helper_vfp_adds(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0xf: /* FMAXP */
gen_helper_vfp_maxs(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x2c: /* FMINNMP */
gen_helper_vfp_minnums(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x2f: /* FMINP */
gen_helper_vfp_mins(tcg_res, tcg_op1, tcg_op2, fpst);
break;
default:
g_assert_not_reached();
}
}
write_fp_sreg(s, rd, tcg_res);
}
}
/*
* Common SSHR[RA]/USHR[RA] - Shift right (optional rounding/accumulate)
*
* This code is handles the common shifting code and is used by both
* the vector and scalar code.
*/
static void handle_shri_with_rndacc(TCGv_i64 tcg_res, TCGv_i64 tcg_src,
TCGv_i64 tcg_rnd, bool accumulate,
bool is_u, int size, int shift)
{
bool extended_result = false;
bool round = tcg_rnd != NULL;
int ext_lshift = 0;
TCGv_i64 tcg_src_hi;
if (round && size == 3) {
extended_result = true;
ext_lshift = 64 - shift;
tcg_src_hi = tcg_temp_new_i64();
} else if (shift == 64) {
if (!accumulate && is_u) {
/* result is zero */
tcg_gen_movi_i64(tcg_res, 0);
return;
}
}
/* Deal with the rounding step */
if (round) {
if (extended_result) {
TCGv_i64 tcg_zero = tcg_constant_i64(0);
if (!is_u) {
/* take care of sign extending tcg_res */
tcg_gen_sari_i64(tcg_src_hi, tcg_src, 63);
tcg_gen_add2_i64(tcg_src, tcg_src_hi,
tcg_src, tcg_src_hi,
tcg_rnd, tcg_zero);
} else {
tcg_gen_add2_i64(tcg_src, tcg_src_hi,
tcg_src, tcg_zero,
tcg_rnd, tcg_zero);
}
} else {
tcg_gen_add_i64(tcg_src, tcg_src, tcg_rnd);
}
}
/* Now do the shift right */
if (round && extended_result) {
/* extended case, >64 bit precision required */
if (ext_lshift == 0) {
/* special case, only high bits matter */
tcg_gen_mov_i64(tcg_src, tcg_src_hi);
} else {
tcg_gen_shri_i64(tcg_src, tcg_src, shift);
tcg_gen_shli_i64(tcg_src_hi, tcg_src_hi, ext_lshift);
tcg_gen_or_i64(tcg_src, tcg_src, tcg_src_hi);
}
} else {
if (is_u) {
if (shift == 64) {
/* essentially shifting in 64 zeros */
tcg_gen_movi_i64(tcg_src, 0);
} else {
tcg_gen_shri_i64(tcg_src, tcg_src, shift);
}
} else {
if (shift == 64) {
/* effectively extending the sign-bit */
tcg_gen_sari_i64(tcg_src, tcg_src, 63);
} else {
tcg_gen_sari_i64(tcg_src, tcg_src, shift);
}
}
}
if (accumulate) {
tcg_gen_add_i64(tcg_res, tcg_res, tcg_src);
} else {
tcg_gen_mov_i64(tcg_res, tcg_src);
}
}
/* SSHR[RA]/USHR[RA] - Scalar shift right (optional rounding/accumulate) */
static void handle_scalar_simd_shri(DisasContext *s,
bool is_u, int immh, int immb,
int opcode, int rn, int rd)
{
const int size = 3;
int immhb = immh << 3 | immb;
int shift = 2 * (8 << size) - immhb;
bool accumulate = false;
bool round = false;
bool insert = false;
TCGv_i64 tcg_rn;
TCGv_i64 tcg_rd;
TCGv_i64 tcg_round;
if (!extract32(immh, 3, 1)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
switch (opcode) {
case 0x02: /* SSRA / USRA (accumulate) */
accumulate = true;
break;
case 0x04: /* SRSHR / URSHR (rounding) */
round = true;
break;
case 0x06: /* SRSRA / URSRA (accum + rounding) */
accumulate = round = true;
break;
case 0x08: /* SRI */
insert = true;
break;
}
if (round) {
tcg_round = tcg_constant_i64(1ULL << (shift - 1));
} else {
tcg_round = NULL;
}
tcg_rn = read_fp_dreg(s, rn);
tcg_rd = (accumulate || insert) ? read_fp_dreg(s, rd) : tcg_temp_new_i64();
if (insert) {
/* shift count same as element size is valid but does nothing;
* special case to avoid potential shift by 64.
*/
int esize = 8 << size;
if (shift != esize) {
tcg_gen_shri_i64(tcg_rn, tcg_rn, shift);
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_rn, 0, esize - shift);
}
} else {
handle_shri_with_rndacc(tcg_rd, tcg_rn, tcg_round,
accumulate, is_u, size, shift);
}
write_fp_dreg(s, rd, tcg_rd);
}
/* SHL/SLI - Scalar shift left */
static void handle_scalar_simd_shli(DisasContext *s, bool insert,
int immh, int immb, int opcode,
int rn, int rd)
{
int size = 32 - clz32(immh) - 1;
int immhb = immh << 3 | immb;
int shift = immhb - (8 << size);
TCGv_i64 tcg_rn;
TCGv_i64 tcg_rd;
if (!extract32(immh, 3, 1)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
tcg_rn = read_fp_dreg(s, rn);
tcg_rd = insert ? read_fp_dreg(s, rd) : tcg_temp_new_i64();
if (insert) {
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_rn, shift, 64 - shift);
} else {
tcg_gen_shli_i64(tcg_rd, tcg_rn, shift);
}
write_fp_dreg(s, rd, tcg_rd);
}
/* SQSHRN/SQSHRUN - Saturating (signed/unsigned) shift right with
* (signed/unsigned) narrowing */
static void handle_vec_simd_sqshrn(DisasContext *s, bool is_scalar, bool is_q,
bool is_u_shift, bool is_u_narrow,
int immh, int immb, int opcode,
int rn, int rd)
{
int immhb = immh << 3 | immb;
int size = 32 - clz32(immh) - 1;
int esize = 8 << size;
int shift = (2 * esize) - immhb;
int elements = is_scalar ? 1 : (64 / esize);
bool round = extract32(opcode, 0, 1);
MemOp ldop = (size + 1) | (is_u_shift ? 0 : MO_SIGN);
TCGv_i64 tcg_rn, tcg_rd, tcg_round;
TCGv_i32 tcg_rd_narrowed;
TCGv_i64 tcg_final;
static NeonGenNarrowEnvFn * const signed_narrow_fns[4][2] = {
{ gen_helper_neon_narrow_sat_s8,
gen_helper_neon_unarrow_sat8 },
{ gen_helper_neon_narrow_sat_s16,
gen_helper_neon_unarrow_sat16 },
{ gen_helper_neon_narrow_sat_s32,
gen_helper_neon_unarrow_sat32 },
{ NULL, NULL },
};
static NeonGenNarrowEnvFn * const unsigned_narrow_fns[4] = {
gen_helper_neon_narrow_sat_u8,
gen_helper_neon_narrow_sat_u16,
gen_helper_neon_narrow_sat_u32,
NULL
};
NeonGenNarrowEnvFn *narrowfn;
int i;
assert(size < 4);
if (extract32(immh, 3, 1)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
if (is_u_shift) {
narrowfn = unsigned_narrow_fns[size];
} else {
narrowfn = signed_narrow_fns[size][is_u_narrow ? 1 : 0];
}
tcg_rn = tcg_temp_new_i64();
tcg_rd = tcg_temp_new_i64();
tcg_rd_narrowed = tcg_temp_new_i32();
tcg_final = tcg_temp_new_i64();
if (round) {
tcg_round = tcg_constant_i64(1ULL << (shift - 1));
} else {
tcg_round = NULL;
}
for (i = 0; i < elements; i++) {
read_vec_element(s, tcg_rn, rn, i, ldop);
handle_shri_with_rndacc(tcg_rd, tcg_rn, tcg_round,
false, is_u_shift, size+1, shift);
narrowfn(tcg_rd_narrowed, tcg_env, tcg_rd);
tcg_gen_extu_i32_i64(tcg_rd, tcg_rd_narrowed);
if (i == 0) {
tcg_gen_extract_i64(tcg_final, tcg_rd, 0, esize);
} else {
tcg_gen_deposit_i64(tcg_final, tcg_final, tcg_rd, esize * i, esize);
}
}
if (!is_q) {
write_vec_element(s, tcg_final, rd, 0, MO_64);
} else {
write_vec_element(s, tcg_final, rd, 1, MO_64);
}
clear_vec_high(s, is_q, rd);
}
/* SQSHLU, UQSHL, SQSHL: saturating left shifts */
static void handle_simd_qshl(DisasContext *s, bool scalar, bool is_q,
bool src_unsigned, bool dst_unsigned,
int immh, int immb, int rn, int rd)
{
int immhb = immh << 3 | immb;
int size = 32 - clz32(immh) - 1;
int shift = immhb - (8 << size);
int pass;
assert(immh != 0);
assert(!(scalar && is_q));
if (!scalar) {
if (!is_q && extract32(immh, 3, 1)) {
unallocated_encoding(s);
return;
}
/* Since we use the variable-shift helpers we must
* replicate the shift count into each element of
* the tcg_shift value.
*/
switch (size) {
case 0:
shift |= shift << 8;
/* fall through */
case 1:
shift |= shift << 16;
break;
case 2:
case 3:
break;
default:
g_assert_not_reached();
}
}
if (!fp_access_check(s)) {
return;
}
if (size == 3) {
TCGv_i64 tcg_shift = tcg_constant_i64(shift);
static NeonGenTwo64OpEnvFn * const fns[2][2] = {
{ gen_helper_neon_qshl_s64, gen_helper_neon_qshlu_s64 },
{ NULL, gen_helper_neon_qshl_u64 },
};
NeonGenTwo64OpEnvFn *genfn = fns[src_unsigned][dst_unsigned];
int maxpass = is_q ? 2 : 1;
for (pass = 0; pass < maxpass; pass++) {
TCGv_i64 tcg_op = tcg_temp_new_i64();
read_vec_element(s, tcg_op, rn, pass, MO_64);
genfn(tcg_op, tcg_env, tcg_op, tcg_shift);
write_vec_element(s, tcg_op, rd, pass, MO_64);
}
clear_vec_high(s, is_q, rd);
} else {
TCGv_i32 tcg_shift = tcg_constant_i32(shift);
static NeonGenTwoOpEnvFn * const fns[2][2][3] = {
{
{ gen_helper_neon_qshl_s8,
gen_helper_neon_qshl_s16,
gen_helper_neon_qshl_s32 },
{ gen_helper_neon_qshlu_s8,
gen_helper_neon_qshlu_s16,
gen_helper_neon_qshlu_s32 }
}, {
{ NULL, NULL, NULL },
{ gen_helper_neon_qshl_u8,
gen_helper_neon_qshl_u16,
gen_helper_neon_qshl_u32 }
}
};
NeonGenTwoOpEnvFn *genfn = fns[src_unsigned][dst_unsigned][size];
MemOp memop = scalar ? size : MO_32;
int maxpass = scalar ? 1 : is_q ? 4 : 2;
for (pass = 0; pass < maxpass; pass++) {
TCGv_i32 tcg_op = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_op, rn, pass, memop);
genfn(tcg_op, tcg_env, tcg_op, tcg_shift);
if (scalar) {
switch (size) {
case 0:
tcg_gen_ext8u_i32(tcg_op, tcg_op);
break;
case 1:
tcg_gen_ext16u_i32(tcg_op, tcg_op);
break;
case 2:
break;
default:
g_assert_not_reached();
}
write_fp_sreg(s, rd, tcg_op);
} else {
write_vec_element_i32(s, tcg_op, rd, pass, MO_32);
}
}
if (!scalar) {
clear_vec_high(s, is_q, rd);
}
}
}
/* Common vector code for handling integer to FP conversion */
static void handle_simd_intfp_conv(DisasContext *s, int rd, int rn,
int elements, int is_signed,
int fracbits, int size)
{
TCGv_ptr tcg_fpst = fpstatus_ptr(size == MO_16 ? FPST_FPCR_F16 : FPST_FPCR);
TCGv_i32 tcg_shift = NULL;
MemOp mop = size | (is_signed ? MO_SIGN : 0);
int pass;
if (fracbits || size == MO_64) {
tcg_shift = tcg_constant_i32(fracbits);
}
if (size == MO_64) {
TCGv_i64 tcg_int64 = tcg_temp_new_i64();
TCGv_i64 tcg_double = tcg_temp_new_i64();
for (pass = 0; pass < elements; pass++) {
read_vec_element(s, tcg_int64, rn, pass, mop);
if (is_signed) {
gen_helper_vfp_sqtod(tcg_double, tcg_int64,
tcg_shift, tcg_fpst);
} else {
gen_helper_vfp_uqtod(tcg_double, tcg_int64,
tcg_shift, tcg_fpst);
}
if (elements == 1) {
write_fp_dreg(s, rd, tcg_double);
} else {
write_vec_element(s, tcg_double, rd, pass, MO_64);
}
}
} else {
TCGv_i32 tcg_int32 = tcg_temp_new_i32();
TCGv_i32 tcg_float = tcg_temp_new_i32();
for (pass = 0; pass < elements; pass++) {
read_vec_element_i32(s, tcg_int32, rn, pass, mop);
switch (size) {
case MO_32:
if (fracbits) {
if (is_signed) {
gen_helper_vfp_sltos(tcg_float, tcg_int32,
tcg_shift, tcg_fpst);
} else {
gen_helper_vfp_ultos(tcg_float, tcg_int32,
tcg_shift, tcg_fpst);
}
} else {
if (is_signed) {
gen_helper_vfp_sitos(tcg_float, tcg_int32, tcg_fpst);
} else {
gen_helper_vfp_uitos(tcg_float, tcg_int32, tcg_fpst);
}
}
break;
case MO_16:
if (fracbits) {
if (is_signed) {
gen_helper_vfp_sltoh(tcg_float, tcg_int32,
tcg_shift, tcg_fpst);
} else {
gen_helper_vfp_ultoh(tcg_float, tcg_int32,
tcg_shift, tcg_fpst);
}
} else {
if (is_signed) {
gen_helper_vfp_sitoh(tcg_float, tcg_int32, tcg_fpst);
} else {
gen_helper_vfp_uitoh(tcg_float, tcg_int32, tcg_fpst);
}
}
break;
default:
g_assert_not_reached();
}
if (elements == 1) {
write_fp_sreg(s, rd, tcg_float);
} else {
write_vec_element_i32(s, tcg_float, rd, pass, size);
}
}
}
clear_vec_high(s, elements << size == 16, rd);
}
/* UCVTF/SCVTF - Integer to FP conversion */
static void handle_simd_shift_intfp_conv(DisasContext *s, bool is_scalar,
bool is_q, bool is_u,
int immh, int immb, int opcode,
int rn, int rd)
{
int size, elements, fracbits;
int immhb = immh << 3 | immb;
if (immh & 8) {
size = MO_64;
if (!is_scalar && !is_q) {
unallocated_encoding(s);
return;
}
} else if (immh & 4) {
size = MO_32;
} else if (immh & 2) {
size = MO_16;
if (!dc_isar_feature(aa64_fp16, s)) {
unallocated_encoding(s);
return;
}
} else {
/* immh == 0 would be a failure of the decode logic */
g_assert(immh == 1);
unallocated_encoding(s);
return;
}
if (is_scalar) {
elements = 1;
} else {
elements = (8 << is_q) >> size;
}
fracbits = (16 << size) - immhb;
if (!fp_access_check(s)) {
return;
}
handle_simd_intfp_conv(s, rd, rn, elements, !is_u, fracbits, size);
}
/* FCVTZS, FVCVTZU - FP to fixedpoint conversion */
static void handle_simd_shift_fpint_conv(DisasContext *s, bool is_scalar,
bool is_q, bool is_u,
int immh, int immb, int rn, int rd)
{
int immhb = immh << 3 | immb;
int pass, size, fracbits;
TCGv_ptr tcg_fpstatus;
TCGv_i32 tcg_rmode, tcg_shift;
if (immh & 0x8) {
size = MO_64;
if (!is_scalar && !is_q) {
unallocated_encoding(s);
return;
}
} else if (immh & 0x4) {
size = MO_32;
} else if (immh & 0x2) {
size = MO_16;
if (!dc_isar_feature(aa64_fp16, s)) {
unallocated_encoding(s);
return;
}
} else {
/* Should have split out AdvSIMD modified immediate earlier. */
assert(immh == 1);
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
assert(!(is_scalar && is_q));
tcg_fpstatus = fpstatus_ptr(size == MO_16 ? FPST_FPCR_F16 : FPST_FPCR);
tcg_rmode = gen_set_rmode(FPROUNDING_ZERO, tcg_fpstatus);
fracbits = (16 << size) - immhb;
tcg_shift = tcg_constant_i32(fracbits);
if (size == MO_64) {
int maxpass = is_scalar ? 1 : 2;
for (pass = 0; pass < maxpass; pass++) {
TCGv_i64 tcg_op = tcg_temp_new_i64();
read_vec_element(s, tcg_op, rn, pass, MO_64);
if (is_u) {
gen_helper_vfp_touqd(tcg_op, tcg_op, tcg_shift, tcg_fpstatus);
} else {
gen_helper_vfp_tosqd(tcg_op, tcg_op, tcg_shift, tcg_fpstatus);
}
write_vec_element(s, tcg_op, rd, pass, MO_64);
}
clear_vec_high(s, is_q, rd);
} else {
void (*fn)(TCGv_i32, TCGv_i32, TCGv_i32, TCGv_ptr);
int maxpass = is_scalar ? 1 : ((8 << is_q) >> size);
switch (size) {
case MO_16:
if (is_u) {
fn = gen_helper_vfp_touhh;
} else {
fn = gen_helper_vfp_toshh;
}
break;
case MO_32:
if (is_u) {
fn = gen_helper_vfp_touls;
} else {
fn = gen_helper_vfp_tosls;
}
break;
default:
g_assert_not_reached();
}
for (pass = 0; pass < maxpass; pass++) {
TCGv_i32 tcg_op = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_op, rn, pass, size);
fn(tcg_op, tcg_op, tcg_shift, tcg_fpstatus);
if (is_scalar) {
write_fp_sreg(s, rd, tcg_op);
} else {
write_vec_element_i32(s, tcg_op, rd, pass, size);
}
}
if (!is_scalar) {
clear_vec_high(s, is_q, rd);
}
}
gen_restore_rmode(tcg_rmode, tcg_fpstatus);
}
/* AdvSIMD scalar shift by immediate
* 31 30 29 28 23 22 19 18 16 15 11 10 9 5 4 0
* +-----+---+-------------+------+------+--------+---+------+------+
* | 0 1 | U | 1 1 1 1 1 0 | immh | immb | opcode | 1 | Rn | Rd |
* +-----+---+-------------+------+------+--------+---+------+------+
*
* This is the scalar version so it works on a fixed sized registers
*/
static void disas_simd_scalar_shift_imm(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int opcode = extract32(insn, 11, 5);
int immb = extract32(insn, 16, 3);
int immh = extract32(insn, 19, 4);
bool is_u = extract32(insn, 29, 1);
if (immh == 0) {
unallocated_encoding(s);
return;
}
switch (opcode) {
case 0x08: /* SRI */
if (!is_u) {
unallocated_encoding(s);
return;
}
/* fall through */
case 0x00: /* SSHR / USHR */
case 0x02: /* SSRA / USRA */
case 0x04: /* SRSHR / URSHR */
case 0x06: /* SRSRA / URSRA */
handle_scalar_simd_shri(s, is_u, immh, immb, opcode, rn, rd);
break;
case 0x0a: /* SHL / SLI */
handle_scalar_simd_shli(s, is_u, immh, immb, opcode, rn, rd);
break;
case 0x1c: /* SCVTF, UCVTF */
handle_simd_shift_intfp_conv(s, true, false, is_u, immh, immb,
opcode, rn, rd);
break;
case 0x10: /* SQSHRUN, SQSHRUN2 */
case 0x11: /* SQRSHRUN, SQRSHRUN2 */
if (!is_u) {
unallocated_encoding(s);
return;
}
handle_vec_simd_sqshrn(s, true, false, false, true,
immh, immb, opcode, rn, rd);
break;
case 0x12: /* SQSHRN, SQSHRN2, UQSHRN */
case 0x13: /* SQRSHRN, SQRSHRN2, UQRSHRN, UQRSHRN2 */
handle_vec_simd_sqshrn(s, true, false, is_u, is_u,
immh, immb, opcode, rn, rd);
break;
case 0xc: /* SQSHLU */
if (!is_u) {
unallocated_encoding(s);
return;
}
handle_simd_qshl(s, true, false, false, true, immh, immb, rn, rd);
break;
case 0xe: /* SQSHL, UQSHL */
handle_simd_qshl(s, true, false, is_u, is_u, immh, immb, rn, rd);
break;
case 0x1f: /* FCVTZS, FCVTZU */
handle_simd_shift_fpint_conv(s, true, false, is_u, immh, immb, rn, rd);
break;
default:
unallocated_encoding(s);
break;
}
}
/* AdvSIMD scalar three different
* 31 30 29 28 24 23 22 21 20 16 15 12 11 10 9 5 4 0
* +-----+---+-----------+------+---+------+--------+-----+------+------+
* | 0 1 | U | 1 1 1 1 0 | size | 1 | Rm | opcode | 0 0 | Rn | Rd |
* +-----+---+-----------+------+---+------+--------+-----+------+------+
*/
static void disas_simd_scalar_three_reg_diff(DisasContext *s, uint32_t insn)
{
bool is_u = extract32(insn, 29, 1);
int size = extract32(insn, 22, 2);
int opcode = extract32(insn, 12, 4);
int rm = extract32(insn, 16, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
if (is_u) {
unallocated_encoding(s);
return;
}
switch (opcode) {
case 0x9: /* SQDMLAL, SQDMLAL2 */
case 0xb: /* SQDMLSL, SQDMLSL2 */
case 0xd: /* SQDMULL, SQDMULL2 */
if (size == 0 || size == 3) {
unallocated_encoding(s);
return;
}
break;
default:
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
if (size == 2) {
TCGv_i64 tcg_op1 = tcg_temp_new_i64();
TCGv_i64 tcg_op2 = tcg_temp_new_i64();
TCGv_i64 tcg_res = tcg_temp_new_i64();
read_vec_element(s, tcg_op1, rn, 0, MO_32 | MO_SIGN);
read_vec_element(s, tcg_op2, rm, 0, MO_32 | MO_SIGN);
tcg_gen_mul_i64(tcg_res, tcg_op1, tcg_op2);
gen_helper_neon_addl_saturate_s64(tcg_res, tcg_env, tcg_res, tcg_res);
switch (opcode) {
case 0xd: /* SQDMULL, SQDMULL2 */
break;
case 0xb: /* SQDMLSL, SQDMLSL2 */
tcg_gen_neg_i64(tcg_res, tcg_res);
/* fall through */
case 0x9: /* SQDMLAL, SQDMLAL2 */
read_vec_element(s, tcg_op1, rd, 0, MO_64);
gen_helper_neon_addl_saturate_s64(tcg_res, tcg_env,
tcg_res, tcg_op1);
break;
default:
g_assert_not_reached();
}
write_fp_dreg(s, rd, tcg_res);
} else {
TCGv_i32 tcg_op1 = read_fp_hreg(s, rn);
TCGv_i32 tcg_op2 = read_fp_hreg(s, rm);
TCGv_i64 tcg_res = tcg_temp_new_i64();
gen_helper_neon_mull_s16(tcg_res, tcg_op1, tcg_op2);
gen_helper_neon_addl_saturate_s32(tcg_res, tcg_env, tcg_res, tcg_res);
switch (opcode) {
case 0xd: /* SQDMULL, SQDMULL2 */
break;
case 0xb: /* SQDMLSL, SQDMLSL2 */
gen_helper_neon_negl_u32(tcg_res, tcg_res);
/* fall through */
case 0x9: /* SQDMLAL, SQDMLAL2 */
{
TCGv_i64 tcg_op3 = tcg_temp_new_i64();
read_vec_element(s, tcg_op3, rd, 0, MO_32);
gen_helper_neon_addl_saturate_s32(tcg_res, tcg_env,
tcg_res, tcg_op3);
break;
}
default:
g_assert_not_reached();
}
tcg_gen_ext32u_i64(tcg_res, tcg_res);
write_fp_dreg(s, rd, tcg_res);
}
}
static void handle_3same_64(DisasContext *s, int opcode, bool u,
TCGv_i64 tcg_rd, TCGv_i64 tcg_rn, TCGv_i64 tcg_rm)
{
/* Handle 64x64->64 opcodes which are shared between the scalar
* and vector 3-same groups. We cover every opcode where size == 3
* is valid in either the three-reg-same (integer, not pairwise)
* or scalar-three-reg-same groups.
*/
TCGCond cond;
switch (opcode) {
case 0x1: /* SQADD */
if (u) {
gen_helper_neon_qadd_u64(tcg_rd, tcg_env, tcg_rn, tcg_rm);
} else {
gen_helper_neon_qadd_s64(tcg_rd, tcg_env, tcg_rn, tcg_rm);
}
break;
case 0x5: /* SQSUB */
if (u) {
gen_helper_neon_qsub_u64(tcg_rd, tcg_env, tcg_rn, tcg_rm);
} else {
gen_helper_neon_qsub_s64(tcg_rd, tcg_env, tcg_rn, tcg_rm);
}
break;
case 0x6: /* CMGT, CMHI */
cond = u ? TCG_COND_GTU : TCG_COND_GT;
do_cmop:
/* 64 bit integer comparison, result = test ? -1 : 0. */
tcg_gen_negsetcond_i64(cond, tcg_rd, tcg_rn, tcg_rm);
break;
case 0x7: /* CMGE, CMHS */
cond = u ? TCG_COND_GEU : TCG_COND_GE;
goto do_cmop;
case 0x11: /* CMTST, CMEQ */
if (u) {
cond = TCG_COND_EQ;
goto do_cmop;
}
gen_cmtst_i64(tcg_rd, tcg_rn, tcg_rm);
break;
case 0x8: /* SSHL, USHL */
if (u) {
gen_ushl_i64(tcg_rd, tcg_rn, tcg_rm);
} else {
gen_sshl_i64(tcg_rd, tcg_rn, tcg_rm);
}
break;
case 0x9: /* SQSHL, UQSHL */
if (u) {
gen_helper_neon_qshl_u64(tcg_rd, tcg_env, tcg_rn, tcg_rm);
} else {
gen_helper_neon_qshl_s64(tcg_rd, tcg_env, tcg_rn, tcg_rm);
}
break;
case 0xa: /* SRSHL, URSHL */
if (u) {
gen_helper_neon_rshl_u64(tcg_rd, tcg_rn, tcg_rm);
} else {
gen_helper_neon_rshl_s64(tcg_rd, tcg_rn, tcg_rm);
}
break;
case 0xb: /* SQRSHL, UQRSHL */
if (u) {
gen_helper_neon_qrshl_u64(tcg_rd, tcg_env, tcg_rn, tcg_rm);
} else {
gen_helper_neon_qrshl_s64(tcg_rd, tcg_env, tcg_rn, tcg_rm);
}
break;
case 0x10: /* ADD, SUB */
if (u) {
tcg_gen_sub_i64(tcg_rd, tcg_rn, tcg_rm);
} else {
tcg_gen_add_i64(tcg_rd, tcg_rn, tcg_rm);
}
break;
default:
g_assert_not_reached();
}
}
/* Handle the 3-same-operands float operations; shared by the scalar
* and vector encodings. The caller must filter out any encodings
* not allocated for the encoding it is dealing with.
*/
static void handle_3same_float(DisasContext *s, int size, int elements,
int fpopcode, int rd, int rn, int rm)
{
int pass;
TCGv_ptr fpst = fpstatus_ptr(FPST_FPCR);
for (pass = 0; pass < elements; pass++) {
if (size) {
/* Double */
TCGv_i64 tcg_op1 = tcg_temp_new_i64();
TCGv_i64 tcg_op2 = tcg_temp_new_i64();
TCGv_i64 tcg_res = tcg_temp_new_i64();
read_vec_element(s, tcg_op1, rn, pass, MO_64);
read_vec_element(s, tcg_op2, rm, pass, MO_64);
switch (fpopcode) {
case 0x39: /* FMLS */
/* As usual for ARM, separate negation for fused multiply-add */
gen_helper_vfp_negd(tcg_op1, tcg_op1);
/* fall through */
case 0x19: /* FMLA */
read_vec_element(s, tcg_res, rd, pass, MO_64);
gen_helper_vfp_muladdd(tcg_res, tcg_op1, tcg_op2,
tcg_res, fpst);
break;
case 0x18: /* FMAXNM */
gen_helper_vfp_maxnumd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1a: /* FADD */
gen_helper_vfp_addd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1b: /* FMULX */
gen_helper_vfp_mulxd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1c: /* FCMEQ */
gen_helper_neon_ceq_f64(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1e: /* FMAX */
gen_helper_vfp_maxd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1f: /* FRECPS */
gen_helper_recpsf_f64(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x38: /* FMINNM */
gen_helper_vfp_minnumd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x3a: /* FSUB */
gen_helper_vfp_subd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x3e: /* FMIN */
gen_helper_vfp_mind(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x3f: /* FRSQRTS */
gen_helper_rsqrtsf_f64(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x5b: /* FMUL */
gen_helper_vfp_muld(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x5c: /* FCMGE */
gen_helper_neon_cge_f64(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x5d: /* FACGE */
gen_helper_neon_acge_f64(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x5f: /* FDIV */
gen_helper_vfp_divd(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x7a: /* FABD */
gen_helper_vfp_subd(tcg_res, tcg_op1, tcg_op2, fpst);
gen_helper_vfp_absd(tcg_res, tcg_res);
break;
case 0x7c: /* FCMGT */
gen_helper_neon_cgt_f64(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x7d: /* FACGT */
gen_helper_neon_acgt_f64(tcg_res, tcg_op1, tcg_op2, fpst);
break;
default:
g_assert_not_reached();
}
write_vec_element(s, tcg_res, rd, pass, MO_64);
} else {
/* Single */
TCGv_i32 tcg_op1 = tcg_temp_new_i32();
TCGv_i32 tcg_op2 = tcg_temp_new_i32();
TCGv_i32 tcg_res = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_op1, rn, pass, MO_32);
read_vec_element_i32(s, tcg_op2, rm, pass, MO_32);
switch (fpopcode) {
case 0x39: /* FMLS */
/* As usual for ARM, separate negation for fused multiply-add */
gen_helper_vfp_negs(tcg_op1, tcg_op1);
/* fall through */
case 0x19: /* FMLA */
read_vec_element_i32(s, tcg_res, rd, pass, MO_32);
gen_helper_vfp_muladds(tcg_res, tcg_op1, tcg_op2,
tcg_res, fpst);
break;
case 0x1a: /* FADD */
gen_helper_vfp_adds(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1b: /* FMULX */
gen_helper_vfp_mulxs(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1c: /* FCMEQ */
gen_helper_neon_ceq_f32(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1e: /* FMAX */
gen_helper_vfp_maxs(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1f: /* FRECPS */
gen_helper_recpsf_f32(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x18: /* FMAXNM */
gen_helper_vfp_maxnums(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x38: /* FMINNM */
gen_helper_vfp_minnums(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x3a: /* FSUB */
gen_helper_vfp_subs(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x3e: /* FMIN */
gen_helper_vfp_mins(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x3f: /* FRSQRTS */
gen_helper_rsqrtsf_f32(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x5b: /* FMUL */
gen_helper_vfp_muls(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x5c: /* FCMGE */
gen_helper_neon_cge_f32(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x5d: /* FACGE */
gen_helper_neon_acge_f32(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x5f: /* FDIV */
gen_helper_vfp_divs(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x7a: /* FABD */
gen_helper_vfp_subs(tcg_res, tcg_op1, tcg_op2, fpst);
gen_helper_vfp_abss(tcg_res, tcg_res);
break;
case 0x7c: /* FCMGT */
gen_helper_neon_cgt_f32(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x7d: /* FACGT */
gen_helper_neon_acgt_f32(tcg_res, tcg_op1, tcg_op2, fpst);
break;
default:
g_assert_not_reached();
}
if (elements == 1) {
/* scalar single so clear high part */
TCGv_i64 tcg_tmp = tcg_temp_new_i64();
tcg_gen_extu_i32_i64(tcg_tmp, tcg_res);
write_vec_element(s, tcg_tmp, rd, pass, MO_64);
} else {
write_vec_element_i32(s, tcg_res, rd, pass, MO_32);
}
}
}
clear_vec_high(s, elements * (size ? 8 : 4) > 8, rd);
}
/* AdvSIMD scalar three same
* 31 30 29 28 24 23 22 21 20 16 15 11 10 9 5 4 0
* +-----+---+-----------+------+---+------+--------+---+------+------+
* | 0 1 | U | 1 1 1 1 0 | size | 1 | Rm | opcode | 1 | Rn | Rd |
* +-----+---+-----------+------+---+------+--------+---+------+------+
*/
static void disas_simd_scalar_three_reg_same(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int opcode = extract32(insn, 11, 5);
int rm = extract32(insn, 16, 5);
int size = extract32(insn, 22, 2);
bool u = extract32(insn, 29, 1);
TCGv_i64 tcg_rd;
if (opcode >= 0x18) {
/* Floating point: U, size[1] and opcode indicate operation */
int fpopcode = opcode | (extract32(size, 1, 1) << 5) | (u << 6);
switch (fpopcode) {
case 0x1b: /* FMULX */
case 0x1f: /* FRECPS */
case 0x3f: /* FRSQRTS */
case 0x5d: /* FACGE */
case 0x7d: /* FACGT */
case 0x1c: /* FCMEQ */
case 0x5c: /* FCMGE */
case 0x7c: /* FCMGT */
case 0x7a: /* FABD */
break;
default:
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_3same_float(s, extract32(size, 0, 1), 1, fpopcode, rd, rn, rm);
return;
}
switch (opcode) {
case 0x1: /* SQADD, UQADD */
case 0x5: /* SQSUB, UQSUB */
case 0x9: /* SQSHL, UQSHL */
case 0xb: /* SQRSHL, UQRSHL */
break;
case 0x8: /* SSHL, USHL */
case 0xa: /* SRSHL, URSHL */
case 0x6: /* CMGT, CMHI */
case 0x7: /* CMGE, CMHS */
case 0x11: /* CMTST, CMEQ */
case 0x10: /* ADD, SUB (vector) */
if (size != 3) {
unallocated_encoding(s);
return;
}
break;
case 0x16: /* SQDMULH, SQRDMULH (vector) */
if (size != 1 && size != 2) {
unallocated_encoding(s);
return;
}
break;
default:
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
tcg_rd = tcg_temp_new_i64();
if (size == 3) {
TCGv_i64 tcg_rn = read_fp_dreg(s, rn);
TCGv_i64 tcg_rm = read_fp_dreg(s, rm);
handle_3same_64(s, opcode, u, tcg_rd, tcg_rn, tcg_rm);
} else {
/* Do a single operation on the lowest element in the vector.
* We use the standard Neon helpers and rely on 0 OP 0 == 0 with
* no side effects for all these operations.
* OPTME: special-purpose helpers would avoid doing some
* unnecessary work in the helper for the 8 and 16 bit cases.
*/
NeonGenTwoOpEnvFn *genenvfn;
TCGv_i32 tcg_rn = tcg_temp_new_i32();
TCGv_i32 tcg_rm = tcg_temp_new_i32();
TCGv_i32 tcg_rd32 = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_rn, rn, 0, size);
read_vec_element_i32(s, tcg_rm, rm, 0, size);
switch (opcode) {
case 0x1: /* SQADD, UQADD */
{
static NeonGenTwoOpEnvFn * const fns[3][2] = {
{ gen_helper_neon_qadd_s8, gen_helper_neon_qadd_u8 },
{ gen_helper_neon_qadd_s16, gen_helper_neon_qadd_u16 },
{ gen_helper_neon_qadd_s32, gen_helper_neon_qadd_u32 },
};
genenvfn = fns[size][u];
break;
}
case 0x5: /* SQSUB, UQSUB */
{
static NeonGenTwoOpEnvFn * const fns[3][2] = {
{ gen_helper_neon_qsub_s8, gen_helper_neon_qsub_u8 },
{ gen_helper_neon_qsub_s16, gen_helper_neon_qsub_u16 },
{ gen_helper_neon_qsub_s32, gen_helper_neon_qsub_u32 },
};
genenvfn = fns[size][u];
break;
}
case 0x9: /* SQSHL, UQSHL */
{
static NeonGenTwoOpEnvFn * const fns[3][2] = {
{ gen_helper_neon_qshl_s8, gen_helper_neon_qshl_u8 },
{ gen_helper_neon_qshl_s16, gen_helper_neon_qshl_u16 },
{ gen_helper_neon_qshl_s32, gen_helper_neon_qshl_u32 },
};
genenvfn = fns[size][u];
break;
}
case 0xb: /* SQRSHL, UQRSHL */
{
static NeonGenTwoOpEnvFn * const fns[3][2] = {
{ gen_helper_neon_qrshl_s8, gen_helper_neon_qrshl_u8 },
{ gen_helper_neon_qrshl_s16, gen_helper_neon_qrshl_u16 },
{ gen_helper_neon_qrshl_s32, gen_helper_neon_qrshl_u32 },
};
genenvfn = fns[size][u];
break;
}
case 0x16: /* SQDMULH, SQRDMULH */
{
static NeonGenTwoOpEnvFn * const fns[2][2] = {
{ gen_helper_neon_qdmulh_s16, gen_helper_neon_qrdmulh_s16 },
{ gen_helper_neon_qdmulh_s32, gen_helper_neon_qrdmulh_s32 },
};
assert(size == 1 || size == 2);
genenvfn = fns[size - 1][u];
break;
}
default:
g_assert_not_reached();
}
genenvfn(tcg_rd32, tcg_env, tcg_rn, tcg_rm);
tcg_gen_extu_i32_i64(tcg_rd, tcg_rd32);
}
write_fp_dreg(s, rd, tcg_rd);
}
/* AdvSIMD scalar three same FP16
* 31 30 29 28 24 23 22 21 20 16 15 14 13 11 10 9 5 4 0
* +-----+---+-----------+---+-----+------+-----+--------+---+----+----+
* | 0 1 | U | 1 1 1 1 0 | a | 1 0 | Rm | 0 0 | opcode | 1 | Rn | Rd |
* +-----+---+-----------+---+-----+------+-----+--------+---+----+----+
* v: 0101 1110 0100 0000 0000 0100 0000 0000 => 5e400400
* m: 1101 1111 0110 0000 1100 0100 0000 0000 => df60c400
*/
static void disas_simd_scalar_three_reg_same_fp16(DisasContext *s,
uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int opcode = extract32(insn, 11, 3);
int rm = extract32(insn, 16, 5);
bool u = extract32(insn, 29, 1);
bool a = extract32(insn, 23, 1);
int fpopcode = opcode | (a << 3) | (u << 4);
TCGv_ptr fpst;
TCGv_i32 tcg_op1;
TCGv_i32 tcg_op2;
TCGv_i32 tcg_res;
switch (fpopcode) {
case 0x03: /* FMULX */
case 0x04: /* FCMEQ (reg) */
case 0x07: /* FRECPS */
case 0x0f: /* FRSQRTS */
case 0x14: /* FCMGE (reg) */
case 0x15: /* FACGE */
case 0x1a: /* FABD */
case 0x1c: /* FCMGT (reg) */
case 0x1d: /* FACGT */
break;
default:
unallocated_encoding(s);
return;
}
if (!dc_isar_feature(aa64_fp16, s)) {
unallocated_encoding(s);
}
if (!fp_access_check(s)) {
return;
}
fpst = fpstatus_ptr(FPST_FPCR_F16);
tcg_op1 = read_fp_hreg(s, rn);
tcg_op2 = read_fp_hreg(s, rm);
tcg_res = tcg_temp_new_i32();
switch (fpopcode) {
case 0x03: /* FMULX */
gen_helper_advsimd_mulxh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x04: /* FCMEQ (reg) */
gen_helper_advsimd_ceq_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x07: /* FRECPS */
gen_helper_recpsf_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x0f: /* FRSQRTS */
gen_helper_rsqrtsf_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x14: /* FCMGE (reg) */
gen_helper_advsimd_cge_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x15: /* FACGE */
gen_helper_advsimd_acge_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1a: /* FABD */
gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst);
tcg_gen_andi_i32(tcg_res, tcg_res, 0x7fff);
break;
case 0x1c: /* FCMGT (reg) */
gen_helper_advsimd_cgt_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1d: /* FACGT */
gen_helper_advsimd_acgt_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
default:
g_assert_not_reached();
}
write_fp_sreg(s, rd, tcg_res);
}
/* AdvSIMD scalar three same extra
* 31 30 29 28 24 23 22 21 20 16 15 14 11 10 9 5 4 0
* +-----+---+-----------+------+---+------+---+--------+---+----+----+
* | 0 1 | U | 1 1 1 1 0 | size | 0 | Rm | 1 | opcode | 1 | Rn | Rd |
* +-----+---+-----------+------+---+------+---+--------+---+----+----+
*/
static void disas_simd_scalar_three_reg_same_extra(DisasContext *s,
uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int opcode = extract32(insn, 11, 4);
int rm = extract32(insn, 16, 5);
int size = extract32(insn, 22, 2);
bool u = extract32(insn, 29, 1);
TCGv_i32 ele1, ele2, ele3;
TCGv_i64 res;
bool feature;
switch (u * 16 + opcode) {
case 0x10: /* SQRDMLAH (vector) */
case 0x11: /* SQRDMLSH (vector) */
if (size != 1 && size != 2) {
unallocated_encoding(s);
return;
}
feature = dc_isar_feature(aa64_rdm, s);
break;
default:
unallocated_encoding(s);
return;
}
if (!feature) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
/* Do a single operation on the lowest element in the vector.
* We use the standard Neon helpers and rely on 0 OP 0 == 0
* with no side effects for all these operations.
* OPTME: special-purpose helpers would avoid doing some
* unnecessary work in the helper for the 16 bit cases.
*/
ele1 = tcg_temp_new_i32();
ele2 = tcg_temp_new_i32();
ele3 = tcg_temp_new_i32();
read_vec_element_i32(s, ele1, rn, 0, size);
read_vec_element_i32(s, ele2, rm, 0, size);
read_vec_element_i32(s, ele3, rd, 0, size);
switch (opcode) {
case 0x0: /* SQRDMLAH */
if (size == 1) {
gen_helper_neon_qrdmlah_s16(ele3, tcg_env, ele1, ele2, ele3);
} else {
gen_helper_neon_qrdmlah_s32(ele3, tcg_env, ele1, ele2, ele3);
}
break;
case 0x1: /* SQRDMLSH */
if (size == 1) {
gen_helper_neon_qrdmlsh_s16(ele3, tcg_env, ele1, ele2, ele3);
} else {
gen_helper_neon_qrdmlsh_s32(ele3, tcg_env, ele1, ele2, ele3);
}
break;
default:
g_assert_not_reached();
}
res = tcg_temp_new_i64();
tcg_gen_extu_i32_i64(res, ele3);
write_fp_dreg(s, rd, res);
}
static void handle_2misc_64(DisasContext *s, int opcode, bool u,
TCGv_i64 tcg_rd, TCGv_i64 tcg_rn,
TCGv_i32 tcg_rmode, TCGv_ptr tcg_fpstatus)
{
/* Handle 64->64 opcodes which are shared between the scalar and
* vector 2-reg-misc groups. We cover every integer opcode where size == 3
* is valid in either group and also the double-precision fp ops.
* The caller only need provide tcg_rmode and tcg_fpstatus if the op
* requires them.
*/
TCGCond cond;
switch (opcode) {
case 0x4: /* CLS, CLZ */
if (u) {
tcg_gen_clzi_i64(tcg_rd, tcg_rn, 64);
} else {
tcg_gen_clrsb_i64(tcg_rd, tcg_rn);
}
break;
case 0x5: /* NOT */
/* This opcode is shared with CNT and RBIT but we have earlier
* enforced that size == 3 if and only if this is the NOT insn.
*/
tcg_gen_not_i64(tcg_rd, tcg_rn);
break;
case 0x7: /* SQABS, SQNEG */
if (u) {
gen_helper_neon_qneg_s64(tcg_rd, tcg_env, tcg_rn);
} else {
gen_helper_neon_qabs_s64(tcg_rd, tcg_env, tcg_rn);
}
break;
case 0xa: /* CMLT */
cond = TCG_COND_LT;
do_cmop:
/* 64 bit integer comparison against zero, result is test ? -1 : 0. */
tcg_gen_negsetcond_i64(cond, tcg_rd, tcg_rn, tcg_constant_i64(0));
break;
case 0x8: /* CMGT, CMGE */
cond = u ? TCG_COND_GE : TCG_COND_GT;
goto do_cmop;
case 0x9: /* CMEQ, CMLE */
cond = u ? TCG_COND_LE : TCG_COND_EQ;
goto do_cmop;
case 0xb: /* ABS, NEG */
if (u) {
tcg_gen_neg_i64(tcg_rd, tcg_rn);
} else {
tcg_gen_abs_i64(tcg_rd, tcg_rn);
}
break;
case 0x2f: /* FABS */
gen_helper_vfp_absd(tcg_rd, tcg_rn);
break;
case 0x6f: /* FNEG */
gen_helper_vfp_negd(tcg_rd, tcg_rn);
break;
case 0x7f: /* FSQRT */
gen_helper_vfp_sqrtd(tcg_rd, tcg_rn, tcg_env);
break;
case 0x1a: /* FCVTNS */
case 0x1b: /* FCVTMS */
case 0x1c: /* FCVTAS */
case 0x3a: /* FCVTPS */
case 0x3b: /* FCVTZS */
gen_helper_vfp_tosqd(tcg_rd, tcg_rn, tcg_constant_i32(0), tcg_fpstatus);
break;
case 0x5a: /* FCVTNU */
case 0x5b: /* FCVTMU */
case 0x5c: /* FCVTAU */
case 0x7a: /* FCVTPU */
case 0x7b: /* FCVTZU */
gen_helper_vfp_touqd(tcg_rd, tcg_rn, tcg_constant_i32(0), tcg_fpstatus);
break;
case 0x18: /* FRINTN */
case 0x19: /* FRINTM */
case 0x38: /* FRINTP */
case 0x39: /* FRINTZ */
case 0x58: /* FRINTA */
case 0x79: /* FRINTI */
gen_helper_rintd(tcg_rd, tcg_rn, tcg_fpstatus);
break;
case 0x59: /* FRINTX */
gen_helper_rintd_exact(tcg_rd, tcg_rn, tcg_fpstatus);
break;
case 0x1e: /* FRINT32Z */
case 0x5e: /* FRINT32X */
gen_helper_frint32_d(tcg_rd, tcg_rn, tcg_fpstatus);
break;
case 0x1f: /* FRINT64Z */
case 0x5f: /* FRINT64X */
gen_helper_frint64_d(tcg_rd, tcg_rn, tcg_fpstatus);
break;
default:
g_assert_not_reached();
}
}
static void handle_2misc_fcmp_zero(DisasContext *s, int opcode,
bool is_scalar, bool is_u, bool is_q,
int size, int rn, int rd)
{
bool is_double = (size == MO_64);
TCGv_ptr fpst;
if (!fp_access_check(s)) {
return;
}
fpst = fpstatus_ptr(size == MO_16 ? FPST_FPCR_F16 : FPST_FPCR);
if (is_double) {
TCGv_i64 tcg_op = tcg_temp_new_i64();
TCGv_i64 tcg_zero = tcg_constant_i64(0);
TCGv_i64 tcg_res = tcg_temp_new_i64();
NeonGenTwoDoubleOpFn *genfn;
bool swap = false;
int pass;
switch (opcode) {
case 0x2e: /* FCMLT (zero) */
swap = true;
/* fallthrough */
case 0x2c: /* FCMGT (zero) */
genfn = gen_helper_neon_cgt_f64;
break;
case 0x2d: /* FCMEQ (zero) */
genfn = gen_helper_neon_ceq_f64;
break;
case 0x6d: /* FCMLE (zero) */
swap = true;
/* fall through */
case 0x6c: /* FCMGE (zero) */
genfn = gen_helper_neon_cge_f64;
break;
default:
g_assert_not_reached();
}
for (pass = 0; pass < (is_scalar ? 1 : 2); pass++) {
read_vec_element(s, tcg_op, rn, pass, MO_64);
if (swap) {
genfn(tcg_res, tcg_zero, tcg_op, fpst);
} else {
genfn(tcg_res, tcg_op, tcg_zero, fpst);
}
write_vec_element(s, tcg_res, rd, pass, MO_64);
}
clear_vec_high(s, !is_scalar, rd);
} else {
TCGv_i32 tcg_op = tcg_temp_new_i32();
TCGv_i32 tcg_zero = tcg_constant_i32(0);
TCGv_i32 tcg_res = tcg_temp_new_i32();
NeonGenTwoSingleOpFn *genfn;
bool swap = false;
int pass, maxpasses;
if (size == MO_16) {
switch (opcode) {
case 0x2e: /* FCMLT (zero) */
swap = true;
/* fall through */
case 0x2c: /* FCMGT (zero) */
genfn = gen_helper_advsimd_cgt_f16;
break;
case 0x2d: /* FCMEQ (zero) */
genfn = gen_helper_advsimd_ceq_f16;
break;
case 0x6d: /* FCMLE (zero) */
swap = true;
/* fall through */
case 0x6c: /* FCMGE (zero) */
genfn = gen_helper_advsimd_cge_f16;
break;
default:
g_assert_not_reached();
}
} else {
switch (opcode) {
case 0x2e: /* FCMLT (zero) */
swap = true;
/* fall through */
case 0x2c: /* FCMGT (zero) */
genfn = gen_helper_neon_cgt_f32;
break;
case 0x2d: /* FCMEQ (zero) */
genfn = gen_helper_neon_ceq_f32;
break;
case 0x6d: /* FCMLE (zero) */
swap = true;
/* fall through */
case 0x6c: /* FCMGE (zero) */
genfn = gen_helper_neon_cge_f32;
break;
default:
g_assert_not_reached();
}
}
if (is_scalar) {
maxpasses = 1;
} else {
int vector_size = 8 << is_q;
maxpasses = vector_size >> size;
}
for (pass = 0; pass < maxpasses; pass++) {
read_vec_element_i32(s, tcg_op, rn, pass, size);
if (swap) {
genfn(tcg_res, tcg_zero, tcg_op, fpst);
} else {
genfn(tcg_res, tcg_op, tcg_zero, fpst);
}
if (is_scalar) {
write_fp_sreg(s, rd, tcg_res);
} else {
write_vec_element_i32(s, tcg_res, rd, pass, size);
}
}
if (!is_scalar) {
clear_vec_high(s, is_q, rd);
}
}
}
static void handle_2misc_reciprocal(DisasContext *s, int opcode,
bool is_scalar, bool is_u, bool is_q,
int size, int rn, int rd)
{
bool is_double = (size == 3);
TCGv_ptr fpst = fpstatus_ptr(FPST_FPCR);
if (is_double) {
TCGv_i64 tcg_op = tcg_temp_new_i64();
TCGv_i64 tcg_res = tcg_temp_new_i64();
int pass;
for (pass = 0; pass < (is_scalar ? 1 : 2); pass++) {
read_vec_element(s, tcg_op, rn, pass, MO_64);
switch (opcode) {
case 0x3d: /* FRECPE */
gen_helper_recpe_f64(tcg_res, tcg_op, fpst);
break;
case 0x3f: /* FRECPX */
gen_helper_frecpx_f64(tcg_res, tcg_op, fpst);
break;
case 0x7d: /* FRSQRTE */
gen_helper_rsqrte_f64(tcg_res, tcg_op, fpst);
break;
default:
g_assert_not_reached();
}
write_vec_element(s, tcg_res, rd, pass, MO_64);
}
clear_vec_high(s, !is_scalar, rd);
} else {
TCGv_i32 tcg_op = tcg_temp_new_i32();
TCGv_i32 tcg_res = tcg_temp_new_i32();
int pass, maxpasses;
if (is_scalar) {
maxpasses = 1;
} else {
maxpasses = is_q ? 4 : 2;
}
for (pass = 0; pass < maxpasses; pass++) {
read_vec_element_i32(s, tcg_op, rn, pass, MO_32);
switch (opcode) {
case 0x3c: /* URECPE */
gen_helper_recpe_u32(tcg_res, tcg_op);
break;
case 0x3d: /* FRECPE */
gen_helper_recpe_f32(tcg_res, tcg_op, fpst);
break;
case 0x3f: /* FRECPX */
gen_helper_frecpx_f32(tcg_res, tcg_op, fpst);
break;
case 0x7d: /* FRSQRTE */
gen_helper_rsqrte_f32(tcg_res, tcg_op, fpst);
break;
default:
g_assert_not_reached();
}
if (is_scalar) {
write_fp_sreg(s, rd, tcg_res);
} else {
write_vec_element_i32(s, tcg_res, rd, pass, MO_32);
}
}
if (!is_scalar) {
clear_vec_high(s, is_q, rd);
}
}
}
static void handle_2misc_narrow(DisasContext *s, bool scalar,
int opcode, bool u, bool is_q,
int size, int rn, int rd)
{
/* Handle 2-reg-misc ops which are narrowing (so each 2*size element
* in the source becomes a size element in the destination).
*/
int pass;
TCGv_i32 tcg_res[2];
int destelt = is_q ? 2 : 0;
int passes = scalar ? 1 : 2;
if (scalar) {
tcg_res[1] = tcg_constant_i32(0);
}
for (pass = 0; pass < passes; pass++) {
TCGv_i64 tcg_op = tcg_temp_new_i64();
NeonGenNarrowFn *genfn = NULL;
NeonGenNarrowEnvFn *genenvfn = NULL;
if (scalar) {
read_vec_element(s, tcg_op, rn, pass, size + 1);
} else {
read_vec_element(s, tcg_op, rn, pass, MO_64);
}
tcg_res[pass] = tcg_temp_new_i32();
switch (opcode) {
case 0x12: /* XTN, SQXTUN */
{
static NeonGenNarrowFn * const xtnfns[3] = {
gen_helper_neon_narrow_u8,
gen_helper_neon_narrow_u16,
tcg_gen_extrl_i64_i32,
};
static NeonGenNarrowEnvFn * const sqxtunfns[3] = {
gen_helper_neon_unarrow_sat8,
gen_helper_neon_unarrow_sat16,
gen_helper_neon_unarrow_sat32,
};
if (u) {
genenvfn = sqxtunfns[size];
} else {
genfn = xtnfns[size];
}
break;
}
case 0x14: /* SQXTN, UQXTN */
{
static NeonGenNarrowEnvFn * const fns[3][2] = {
{ gen_helper_neon_narrow_sat_s8,
gen_helper_neon_narrow_sat_u8 },
{ gen_helper_neon_narrow_sat_s16,
gen_helper_neon_narrow_sat_u16 },
{ gen_helper_neon_narrow_sat_s32,
gen_helper_neon_narrow_sat_u32 },
};
genenvfn = fns[size][u];
break;
}
case 0x16: /* FCVTN, FCVTN2 */
/* 32 bit to 16 bit or 64 bit to 32 bit float conversion */
if (size == 2) {
gen_helper_vfp_fcvtsd(tcg_res[pass], tcg_op, tcg_env);
} else {
TCGv_i32 tcg_lo = tcg_temp_new_i32();
TCGv_i32 tcg_hi = tcg_temp_new_i32();
TCGv_ptr fpst = fpstatus_ptr(FPST_FPCR);
TCGv_i32 ahp = get_ahp_flag();
tcg_gen_extr_i64_i32(tcg_lo, tcg_hi, tcg_op);
gen_helper_vfp_fcvt_f32_to_f16(tcg_lo, tcg_lo, fpst, ahp);
gen_helper_vfp_fcvt_f32_to_f16(tcg_hi, tcg_hi, fpst, ahp);
tcg_gen_deposit_i32(tcg_res[pass], tcg_lo, tcg_hi, 16, 16);
}
break;
case 0x36: /* BFCVTN, BFCVTN2 */
{
TCGv_ptr fpst = fpstatus_ptr(FPST_FPCR);
gen_helper_bfcvt_pair(tcg_res[pass], tcg_op, fpst);
}
break;
case 0x56: /* FCVTXN, FCVTXN2 */
/* 64 bit to 32 bit float conversion
* with von Neumann rounding (round to odd)
*/
assert(size == 2);
gen_helper_fcvtx_f64_to_f32(tcg_res[pass], tcg_op, tcg_env);
break;
default:
g_assert_not_reached();
}
if (genfn) {
genfn(tcg_res[pass], tcg_op);
} else if (genenvfn) {
genenvfn(tcg_res[pass], tcg_env, tcg_op);
}
}
for (pass = 0; pass < 2; pass++) {
write_vec_element_i32(s, tcg_res[pass], rd, destelt + pass, MO_32);
}
clear_vec_high(s, is_q, rd);
}
/* Remaining saturating accumulating ops */
static void handle_2misc_satacc(DisasContext *s, bool is_scalar, bool is_u,
bool is_q, int size, int rn, int rd)
{
bool is_double = (size == 3);
if (is_double) {
TCGv_i64 tcg_rn = tcg_temp_new_i64();
TCGv_i64 tcg_rd = tcg_temp_new_i64();
int pass;
for (pass = 0; pass < (is_scalar ? 1 : 2); pass++) {
read_vec_element(s, tcg_rn, rn, pass, MO_64);
read_vec_element(s, tcg_rd, rd, pass, MO_64);
if (is_u) { /* USQADD */
gen_helper_neon_uqadd_s64(tcg_rd, tcg_env, tcg_rn, tcg_rd);
} else { /* SUQADD */
gen_helper_neon_sqadd_u64(tcg_rd, tcg_env, tcg_rn, tcg_rd);
}
write_vec_element(s, tcg_rd, rd, pass, MO_64);
}
clear_vec_high(s, !is_scalar, rd);
} else {
TCGv_i32 tcg_rn = tcg_temp_new_i32();
TCGv_i32 tcg_rd = tcg_temp_new_i32();
int pass, maxpasses;
if (is_scalar) {
maxpasses = 1;
} else {
maxpasses = is_q ? 4 : 2;
}
for (pass = 0; pass < maxpasses; pass++) {
if (is_scalar) {
read_vec_element_i32(s, tcg_rn, rn, pass, size);
read_vec_element_i32(s, tcg_rd, rd, pass, size);
} else {
read_vec_element_i32(s, tcg_rn, rn, pass, MO_32);
read_vec_element_i32(s, tcg_rd, rd, pass, MO_32);
}
if (is_u) { /* USQADD */
switch (size) {
case 0:
gen_helper_neon_uqadd_s8(tcg_rd, tcg_env, tcg_rn, tcg_rd);
break;
case 1:
gen_helper_neon_uqadd_s16(tcg_rd, tcg_env, tcg_rn, tcg_rd);
break;
case 2:
gen_helper_neon_uqadd_s32(tcg_rd, tcg_env, tcg_rn, tcg_rd);
break;
default:
g_assert_not_reached();
}
} else { /* SUQADD */
switch (size) {
case 0:
gen_helper_neon_sqadd_u8(tcg_rd, tcg_env, tcg_rn, tcg_rd);
break;
case 1:
gen_helper_neon_sqadd_u16(tcg_rd, tcg_env, tcg_rn, tcg_rd);
break;
case 2:
gen_helper_neon_sqadd_u32(tcg_rd, tcg_env, tcg_rn, tcg_rd);
break;
default:
g_assert_not_reached();
}
}
if (is_scalar) {
write_vec_element(s, tcg_constant_i64(0), rd, 0, MO_64);
}
write_vec_element_i32(s, tcg_rd, rd, pass, MO_32);
}
clear_vec_high(s, is_q, rd);
}
}
/* AdvSIMD scalar two reg misc
* 31 30 29 28 24 23 22 21 17 16 12 11 10 9 5 4 0
* +-----+---+-----------+------+-----------+--------+-----+------+------+
* | 0 1 | U | 1 1 1 1 0 | size | 1 0 0 0 0 | opcode | 1 0 | Rn | Rd |
* +-----+---+-----------+------+-----------+--------+-----+------+------+
*/
static void disas_simd_scalar_two_reg_misc(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int opcode = extract32(insn, 12, 5);
int size = extract32(insn, 22, 2);
bool u = extract32(insn, 29, 1);
bool is_fcvt = false;
int rmode;
TCGv_i32 tcg_rmode;
TCGv_ptr tcg_fpstatus;
switch (opcode) {
case 0x3: /* USQADD / SUQADD*/
if (!fp_access_check(s)) {
return;
}
handle_2misc_satacc(s, true, u, false, size, rn, rd);
return;
case 0x7: /* SQABS / SQNEG */
break;
case 0xa: /* CMLT */
if (u) {
unallocated_encoding(s);
return;
}
/* fall through */
case 0x8: /* CMGT, CMGE */
case 0x9: /* CMEQ, CMLE */
case 0xb: /* ABS, NEG */
if (size != 3) {
unallocated_encoding(s);
return;
}
break;
case 0x12: /* SQXTUN */
if (!u) {
unallocated_encoding(s);
return;
}
/* fall through */
case 0x14: /* SQXTN, UQXTN */
if (size == 3) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_2misc_narrow(s, true, opcode, u, false, size, rn, rd);
return;
case 0xc ... 0xf:
case 0x16 ... 0x1d:
case 0x1f:
/* Floating point: U, size[1] and opcode indicate operation;
* size[0] indicates single or double precision.
*/
opcode |= (extract32(size, 1, 1) << 5) | (u << 6);
size = extract32(size, 0, 1) ? 3 : 2;
switch (opcode) {
case 0x2c: /* FCMGT (zero) */
case 0x2d: /* FCMEQ (zero) */
case 0x2e: /* FCMLT (zero) */
case 0x6c: /* FCMGE (zero) */
case 0x6d: /* FCMLE (zero) */
handle_2misc_fcmp_zero(s, opcode, true, u, true, size, rn, rd);
return;
case 0x1d: /* SCVTF */
case 0x5d: /* UCVTF */
{
bool is_signed = (opcode == 0x1d);
if (!fp_access_check(s)) {
return;
}
handle_simd_intfp_conv(s, rd, rn, 1, is_signed, 0, size);
return;
}
case 0x3d: /* FRECPE */
case 0x3f: /* FRECPX */
case 0x7d: /* FRSQRTE */
if (!fp_access_check(s)) {
return;
}
handle_2misc_reciprocal(s, opcode, true, u, true, size, rn, rd);
return;
case 0x1a: /* FCVTNS */
case 0x1b: /* FCVTMS */
case 0x3a: /* FCVTPS */
case 0x3b: /* FCVTZS */
case 0x5a: /* FCVTNU */
case 0x5b: /* FCVTMU */
case 0x7a: /* FCVTPU */
case 0x7b: /* FCVTZU */
is_fcvt = true;
rmode = extract32(opcode, 5, 1) | (extract32(opcode, 0, 1) << 1);
break;
case 0x1c: /* FCVTAS */
case 0x5c: /* FCVTAU */
/* TIEAWAY doesn't fit in the usual rounding mode encoding */
is_fcvt = true;
rmode = FPROUNDING_TIEAWAY;
break;
case 0x56: /* FCVTXN, FCVTXN2 */
if (size == 2) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_2misc_narrow(s, true, opcode, u, false, size - 1, rn, rd);
return;
default:
unallocated_encoding(s);
return;
}
break;
default:
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
if (is_fcvt) {
tcg_fpstatus = fpstatus_ptr(FPST_FPCR);
tcg_rmode = gen_set_rmode(rmode, tcg_fpstatus);
} else {
tcg_fpstatus = NULL;
tcg_rmode = NULL;
}
if (size == 3) {
TCGv_i64 tcg_rn = read_fp_dreg(s, rn);
TCGv_i64 tcg_rd = tcg_temp_new_i64();
handle_2misc_64(s, opcode, u, tcg_rd, tcg_rn, tcg_rmode, tcg_fpstatus);
write_fp_dreg(s, rd, tcg_rd);
} else {
TCGv_i32 tcg_rn = tcg_temp_new_i32();
TCGv_i32 tcg_rd = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_rn, rn, 0, size);
switch (opcode) {
case 0x7: /* SQABS, SQNEG */
{
NeonGenOneOpEnvFn *genfn;
static NeonGenOneOpEnvFn * const fns[3][2] = {
{ gen_helper_neon_qabs_s8, gen_helper_neon_qneg_s8 },
{ gen_helper_neon_qabs_s16, gen_helper_neon_qneg_s16 },
{ gen_helper_neon_qabs_s32, gen_helper_neon_qneg_s32 },
};
genfn = fns[size][u];
genfn(tcg_rd, tcg_env, tcg_rn);
break;
}
case 0x1a: /* FCVTNS */
case 0x1b: /* FCVTMS */
case 0x1c: /* FCVTAS */
case 0x3a: /* FCVTPS */
case 0x3b: /* FCVTZS */
gen_helper_vfp_tosls(tcg_rd, tcg_rn, tcg_constant_i32(0),
tcg_fpstatus);
break;
case 0x5a: /* FCVTNU */
case 0x5b: /* FCVTMU */
case 0x5c: /* FCVTAU */
case 0x7a: /* FCVTPU */
case 0x7b: /* FCVTZU */
gen_helper_vfp_touls(tcg_rd, tcg_rn, tcg_constant_i32(0),
tcg_fpstatus);
break;
default:
g_assert_not_reached();
}
write_fp_sreg(s, rd, tcg_rd);
}
if (is_fcvt) {
gen_restore_rmode(tcg_rmode, tcg_fpstatus);
}
}
/* SSHR[RA]/USHR[RA] - Vector shift right (optional rounding/accumulate) */
static void handle_vec_simd_shri(DisasContext *s, bool is_q, bool is_u,
int immh, int immb, int opcode, int rn, int rd)
{
int size = 32 - clz32(immh) - 1;
int immhb = immh << 3 | immb;
int shift = 2 * (8 << size) - immhb;
GVecGen2iFn *gvec_fn;
if (extract32(immh, 3, 1) && !is_q) {
unallocated_encoding(s);
return;
}
tcg_debug_assert(size <= 3);
if (!fp_access_check(s)) {
return;
}
switch (opcode) {
case 0x02: /* SSRA / USRA (accumulate) */
gvec_fn = is_u ? gen_gvec_usra : gen_gvec_ssra;
break;
case 0x08: /* SRI */
gvec_fn = gen_gvec_sri;
break;
case 0x00: /* SSHR / USHR */
if (is_u) {
if (shift == 8 << size) {
/* Shift count the same size as element size produces zero. */
tcg_gen_gvec_dup_imm(size, vec_full_reg_offset(s, rd),
is_q ? 16 : 8, vec_full_reg_size(s), 0);
return;
}
gvec_fn = tcg_gen_gvec_shri;
} else {
/* Shift count the same size as element size produces all sign. */
if (shift == 8 << size) {
shift -= 1;
}
gvec_fn = tcg_gen_gvec_sari;
}
break;
case 0x04: /* SRSHR / URSHR (rounding) */
gvec_fn = is_u ? gen_gvec_urshr : gen_gvec_srshr;
break;
case 0x06: /* SRSRA / URSRA (accum + rounding) */
gvec_fn = is_u ? gen_gvec_ursra : gen_gvec_srsra;
break;
default:
g_assert_not_reached();
}
gen_gvec_fn2i(s, is_q, rd, rn, shift, gvec_fn, size);
}
/* SHL/SLI - Vector shift left */
static void handle_vec_simd_shli(DisasContext *s, bool is_q, bool insert,
int immh, int immb, int opcode, int rn, int rd)
{
int size = 32 - clz32(immh) - 1;
int immhb = immh << 3 | immb;
int shift = immhb - (8 << size);
/* Range of size is limited by decode: immh is a non-zero 4 bit field */
assert(size >= 0 && size <= 3);
if (extract32(immh, 3, 1) && !is_q) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
if (insert) {
gen_gvec_fn2i(s, is_q, rd, rn, shift, gen_gvec_sli, size);
} else {
gen_gvec_fn2i(s, is_q, rd, rn, shift, tcg_gen_gvec_shli, size);
}
}
/* USHLL/SHLL - Vector shift left with widening */
static void handle_vec_simd_wshli(DisasContext *s, bool is_q, bool is_u,
int immh, int immb, int opcode, int rn, int rd)
{
int size = 32 - clz32(immh) - 1;
int immhb = immh << 3 | immb;
int shift = immhb - (8 << size);
int dsize = 64;
int esize = 8 << size;
int elements = dsize/esize;
TCGv_i64 tcg_rn = tcg_temp_new_i64();
TCGv_i64 tcg_rd = tcg_temp_new_i64();
int i;
if (size >= 3) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
/* For the LL variants the store is larger than the load,
* so if rd == rn we would overwrite parts of our input.
* So load everything right now and use shifts in the main loop.
*/
read_vec_element(s, tcg_rn, rn, is_q ? 1 : 0, MO_64);
for (i = 0; i < elements; i++) {
tcg_gen_shri_i64(tcg_rd, tcg_rn, i * esize);
ext_and_shift_reg(tcg_rd, tcg_rd, size | (!is_u << 2), 0);
tcg_gen_shli_i64(tcg_rd, tcg_rd, shift);
write_vec_element(s, tcg_rd, rd, i, size + 1);
}
}
/* SHRN/RSHRN - Shift right with narrowing (and potential rounding) */
static void handle_vec_simd_shrn(DisasContext *s, bool is_q,
int immh, int immb, int opcode, int rn, int rd)
{
int immhb = immh << 3 | immb;
int size = 32 - clz32(immh) - 1;
int dsize = 64;
int esize = 8 << size;
int elements = dsize/esize;
int shift = (2 * esize) - immhb;
bool round = extract32(opcode, 0, 1);
TCGv_i64 tcg_rn, tcg_rd, tcg_final;
TCGv_i64 tcg_round;
int i;
if (extract32(immh, 3, 1)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
tcg_rn = tcg_temp_new_i64();
tcg_rd = tcg_temp_new_i64();
tcg_final = tcg_temp_new_i64();
read_vec_element(s, tcg_final, rd, is_q ? 1 : 0, MO_64);
if (round) {
tcg_round = tcg_constant_i64(1ULL << (shift - 1));
} else {
tcg_round = NULL;
}
for (i = 0; i < elements; i++) {
read_vec_element(s, tcg_rn, rn, i, size+1);
handle_shri_with_rndacc(tcg_rd, tcg_rn, tcg_round,
false, true, size+1, shift);
tcg_gen_deposit_i64(tcg_final, tcg_final, tcg_rd, esize * i, esize);
}
if (!is_q) {
write_vec_element(s, tcg_final, rd, 0, MO_64);
} else {
write_vec_element(s, tcg_final, rd, 1, MO_64);
}
clear_vec_high(s, is_q, rd);
}
/* AdvSIMD shift by immediate
* 31 30 29 28 23 22 19 18 16 15 11 10 9 5 4 0
* +---+---+---+-------------+------+------+--------+---+------+------+
* | 0 | Q | U | 0 1 1 1 1 0 | immh | immb | opcode | 1 | Rn | Rd |
* +---+---+---+-------------+------+------+--------+---+------+------+
*/
static void disas_simd_shift_imm(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int opcode = extract32(insn, 11, 5);
int immb = extract32(insn, 16, 3);
int immh = extract32(insn, 19, 4);
bool is_u = extract32(insn, 29, 1);
bool is_q = extract32(insn, 30, 1);
/* data_proc_simd[] has sent immh == 0 to disas_simd_mod_imm. */
assert(immh != 0);
switch (opcode) {
case 0x08: /* SRI */
if (!is_u) {
unallocated_encoding(s);
return;
}
/* fall through */
case 0x00: /* SSHR / USHR */
case 0x02: /* SSRA / USRA (accumulate) */
case 0x04: /* SRSHR / URSHR (rounding) */
case 0x06: /* SRSRA / URSRA (accum + rounding) */
handle_vec_simd_shri(s, is_q, is_u, immh, immb, opcode, rn, rd);
break;
case 0x0a: /* SHL / SLI */
handle_vec_simd_shli(s, is_q, is_u, immh, immb, opcode, rn, rd);
break;
case 0x10: /* SHRN */
case 0x11: /* RSHRN / SQRSHRUN */
if (is_u) {
handle_vec_simd_sqshrn(s, false, is_q, false, true, immh, immb,
opcode, rn, rd);
} else {
handle_vec_simd_shrn(s, is_q, immh, immb, opcode, rn, rd);
}
break;
case 0x12: /* SQSHRN / UQSHRN */
case 0x13: /* SQRSHRN / UQRSHRN */
handle_vec_simd_sqshrn(s, false, is_q, is_u, is_u, immh, immb,
opcode, rn, rd);
break;
case 0x14: /* SSHLL / USHLL */
handle_vec_simd_wshli(s, is_q, is_u, immh, immb, opcode, rn, rd);
break;
case 0x1c: /* SCVTF / UCVTF */
handle_simd_shift_intfp_conv(s, false, is_q, is_u, immh, immb,
opcode, rn, rd);
break;
case 0xc: /* SQSHLU */
if (!is_u) {
unallocated_encoding(s);
return;
}
handle_simd_qshl(s, false, is_q, false, true, immh, immb, rn, rd);
break;
case 0xe: /* SQSHL, UQSHL */
handle_simd_qshl(s, false, is_q, is_u, is_u, immh, immb, rn, rd);
break;
case 0x1f: /* FCVTZS/ FCVTZU */
handle_simd_shift_fpint_conv(s, false, is_q, is_u, immh, immb, rn, rd);
return;
default:
unallocated_encoding(s);
return;
}
}
/* Generate code to do a "long" addition or subtraction, ie one done in
* TCGv_i64 on vector lanes twice the width specified by size.
*/
static void gen_neon_addl(int size, bool is_sub, TCGv_i64 tcg_res,
TCGv_i64 tcg_op1, TCGv_i64 tcg_op2)
{
static NeonGenTwo64OpFn * const fns[3][2] = {
{ gen_helper_neon_addl_u16, gen_helper_neon_subl_u16 },
{ gen_helper_neon_addl_u32, gen_helper_neon_subl_u32 },
{ tcg_gen_add_i64, tcg_gen_sub_i64 },
};
NeonGenTwo64OpFn *genfn;
assert(size < 3);
genfn = fns[size][is_sub];
genfn(tcg_res, tcg_op1, tcg_op2);
}
static void handle_3rd_widening(DisasContext *s, int is_q, int is_u, int size,
int opcode, int rd, int rn, int rm)
{
/* 3-reg-different widening insns: 64 x 64 -> 128 */
TCGv_i64 tcg_res[2];
int pass, accop;
tcg_res[0] = tcg_temp_new_i64();
tcg_res[1] = tcg_temp_new_i64();
/* Does this op do an adding accumulate, a subtracting accumulate,
* or no accumulate at all?
*/
switch (opcode) {
case 5:
case 8:
case 9:
accop = 1;
break;
case 10:
case 11:
accop = -1;
break;
default:
accop = 0;
break;
}
if (accop != 0) {
read_vec_element(s, tcg_res[0], rd, 0, MO_64);
read_vec_element(s, tcg_res[1], rd, 1, MO_64);
}
/* size == 2 means two 32x32->64 operations; this is worth special
* casing because we can generally handle it inline.
*/
if (size == 2) {
for (pass = 0; pass < 2; pass++) {
TCGv_i64 tcg_op1 = tcg_temp_new_i64();
TCGv_i64 tcg_op2 = tcg_temp_new_i64();
TCGv_i64 tcg_passres;
MemOp memop = MO_32 | (is_u ? 0 : MO_SIGN);
int elt = pass + is_q * 2;
read_vec_element(s, tcg_op1, rn, elt, memop);
read_vec_element(s, tcg_op2, rm, elt, memop);
if (accop == 0) {
tcg_passres = tcg_res[pass];
} else {
tcg_passres = tcg_temp_new_i64();
}
switch (opcode) {
case 0: /* SADDL, SADDL2, UADDL, UADDL2 */
tcg_gen_add_i64(tcg_passres, tcg_op1, tcg_op2);
break;
case 2: /* SSUBL, SSUBL2, USUBL, USUBL2 */
tcg_gen_sub_i64(tcg_passres, tcg_op1, tcg_op2);
break;
case 5: /* SABAL, SABAL2, UABAL, UABAL2 */
case 7: /* SABDL, SABDL2, UABDL, UABDL2 */
{
TCGv_i64 tcg_tmp1 = tcg_temp_new_i64();
TCGv_i64 tcg_tmp2 = tcg_temp_new_i64();
tcg_gen_sub_i64(tcg_tmp1, tcg_op1, tcg_op2);
tcg_gen_sub_i64(tcg_tmp2, tcg_op2, tcg_op1);
tcg_gen_movcond_i64(is_u ? TCG_COND_GEU : TCG_COND_GE,
tcg_passres,
tcg_op1, tcg_op2, tcg_tmp1, tcg_tmp2);
break;
}
case 8: /* SMLAL, SMLAL2, UMLAL, UMLAL2 */
case 10: /* SMLSL, SMLSL2, UMLSL, UMLSL2 */
case 12: /* UMULL, UMULL2, SMULL, SMULL2 */
tcg_gen_mul_i64(tcg_passres, tcg_op1, tcg_op2);
break;
case 9: /* SQDMLAL, SQDMLAL2 */
case 11: /* SQDMLSL, SQDMLSL2 */
case 13: /* SQDMULL, SQDMULL2 */
tcg_gen_mul_i64(tcg_passres, tcg_op1, tcg_op2);
gen_helper_neon_addl_saturate_s64(tcg_passres, tcg_env,
tcg_passres, tcg_passres);
break;
default:
g_assert_not_reached();
}
if (opcode == 9 || opcode == 11) {
/* saturating accumulate ops */
if (accop < 0) {
tcg_gen_neg_i64(tcg_passres, tcg_passres);
}
gen_helper_neon_addl_saturate_s64(tcg_res[pass], tcg_env,
tcg_res[pass], tcg_passres);
} else if (accop > 0) {
tcg_gen_add_i64(tcg_res[pass], tcg_res[pass], tcg_passres);
} else if (accop < 0) {
tcg_gen_sub_i64(tcg_res[pass], tcg_res[pass], tcg_passres);
}
}
} else {
/* size 0 or 1, generally helper functions */
for (pass = 0; pass < 2; pass++) {
TCGv_i32 tcg_op1 = tcg_temp_new_i32();
TCGv_i32 tcg_op2 = tcg_temp_new_i32();
TCGv_i64 tcg_passres;
int elt = pass + is_q * 2;
read_vec_element_i32(s, tcg_op1, rn, elt, MO_32);
read_vec_element_i32(s, tcg_op2, rm, elt, MO_32);
if (accop == 0) {
tcg_passres = tcg_res[pass];
} else {
tcg_passres = tcg_temp_new_i64();
}
switch (opcode) {
case 0: /* SADDL, SADDL2, UADDL, UADDL2 */
case 2: /* SSUBL, SSUBL2, USUBL, USUBL2 */
{
TCGv_i64 tcg_op2_64 = tcg_temp_new_i64();
static NeonGenWidenFn * const widenfns[2][2] = {
{ gen_helper_neon_widen_s8, gen_helper_neon_widen_u8 },
{ gen_helper_neon_widen_s16, gen_helper_neon_widen_u16 },
};
NeonGenWidenFn *widenfn = widenfns[size][is_u];
widenfn(tcg_op2_64, tcg_op2);
widenfn(tcg_passres, tcg_op1);
gen_neon_addl(size, (opcode == 2), tcg_passres,
tcg_passres, tcg_op2_64);
break;
}
case 5: /* SABAL, SABAL2, UABAL, UABAL2 */
case 7: /* SABDL, SABDL2, UABDL, UABDL2 */
if (size == 0) {
if (is_u) {
gen_helper_neon_abdl_u16(tcg_passres, tcg_op1, tcg_op2);
} else {
gen_helper_neon_abdl_s16(tcg_passres, tcg_op1, tcg_op2);
}
} else {
if (is_u) {
gen_helper_neon_abdl_u32(tcg_passres, tcg_op1, tcg_op2);
} else {
gen_helper_neon_abdl_s32(tcg_passres, tcg_op1, tcg_op2);
}
}
break;
case 8: /* SMLAL, SMLAL2, UMLAL, UMLAL2 */
case 10: /* SMLSL, SMLSL2, UMLSL, UMLSL2 */
case 12: /* UMULL, UMULL2, SMULL, SMULL2 */
if (size == 0) {
if (is_u) {
gen_helper_neon_mull_u8(tcg_passres, tcg_op1, tcg_op2);
} else {
gen_helper_neon_mull_s8(tcg_passres, tcg_op1, tcg_op2);
}
} else {
if (is_u) {
gen_helper_neon_mull_u16(tcg_passres, tcg_op1, tcg_op2);
} else {
gen_helper_neon_mull_s16(tcg_passres, tcg_op1, tcg_op2);
}
}
break;
case 9: /* SQDMLAL, SQDMLAL2 */
case 11: /* SQDMLSL, SQDMLSL2 */
case 13: /* SQDMULL, SQDMULL2 */
assert(size == 1);
gen_helper_neon_mull_s16(tcg_passres, tcg_op1, tcg_op2);
gen_helper_neon_addl_saturate_s32(tcg_passres, tcg_env,
tcg_passres, tcg_passres);
break;
default:
g_assert_not_reached();
}
if (accop != 0) {
if (opcode == 9 || opcode == 11) {
/* saturating accumulate ops */
if (accop < 0) {
gen_helper_neon_negl_u32(tcg_passres, tcg_passres);
}
gen_helper_neon_addl_saturate_s32(tcg_res[pass], tcg_env,
tcg_res[pass],
tcg_passres);
} else {
gen_neon_addl(size, (accop < 0), tcg_res[pass],
tcg_res[pass], tcg_passres);
}
}
}
}
write_vec_element(s, tcg_res[0], rd, 0, MO_64);
write_vec_element(s, tcg_res[1], rd, 1, MO_64);
}
static void handle_3rd_wide(DisasContext *s, int is_q, int is_u, int size,
int opcode, int rd, int rn, int rm)
{
TCGv_i64 tcg_res[2];
int part = is_q ? 2 : 0;
int pass;
for (pass = 0; pass < 2; pass++) {
TCGv_i64 tcg_op1 = tcg_temp_new_i64();
TCGv_i32 tcg_op2 = tcg_temp_new_i32();
TCGv_i64 tcg_op2_wide = tcg_temp_new_i64();
static NeonGenWidenFn * const widenfns[3][2] = {
{ gen_helper_neon_widen_s8, gen_helper_neon_widen_u8 },
{ gen_helper_neon_widen_s16, gen_helper_neon_widen_u16 },
{ tcg_gen_ext_i32_i64, tcg_gen_extu_i32_i64 },
};
NeonGenWidenFn *widenfn = widenfns[size][is_u];
read_vec_element(s, tcg_op1, rn, pass, MO_64);
read_vec_element_i32(s, tcg_op2, rm, part + pass, MO_32);
widenfn(tcg_op2_wide, tcg_op2);
tcg_res[pass] = tcg_temp_new_i64();
gen_neon_addl(size, (opcode == 3),
tcg_res[pass], tcg_op1, tcg_op2_wide);
}
for (pass = 0; pass < 2; pass++) {
write_vec_element(s, tcg_res[pass], rd, pass, MO_64);
}
}
static void do_narrow_round_high_u32(TCGv_i32 res, TCGv_i64 in)
{
tcg_gen_addi_i64(in, in, 1U << 31);
tcg_gen_extrh_i64_i32(res, in);
}
static void handle_3rd_narrowing(DisasContext *s, int is_q, int is_u, int size,
int opcode, int rd, int rn, int rm)
{
TCGv_i32 tcg_res[2];
int part = is_q ? 2 : 0;
int pass;
for (pass = 0; pass < 2; pass++) {
TCGv_i64 tcg_op1 = tcg_temp_new_i64();
TCGv_i64 tcg_op2 = tcg_temp_new_i64();
TCGv_i64 tcg_wideres = tcg_temp_new_i64();
static NeonGenNarrowFn * const narrowfns[3][2] = {
{ gen_helper_neon_narrow_high_u8,
gen_helper_neon_narrow_round_high_u8 },
{ gen_helper_neon_narrow_high_u16,
gen_helper_neon_narrow_round_high_u16 },
{ tcg_gen_extrh_i64_i32, do_narrow_round_high_u32 },
};
NeonGenNarrowFn *gennarrow = narrowfns[size][is_u];
read_vec_element(s, tcg_op1, rn, pass, MO_64);
read_vec_element(s, tcg_op2, rm, pass, MO_64);
gen_neon_addl(size, (opcode == 6), tcg_wideres, tcg_op1, tcg_op2);
tcg_res[pass] = tcg_temp_new_i32();
gennarrow(tcg_res[pass], tcg_wideres);
}
for (pass = 0; pass < 2; pass++) {
write_vec_element_i32(s, tcg_res[pass], rd, pass + part, MO_32);
}
clear_vec_high(s, is_q, rd);
}
/* AdvSIMD three different
* 31 30 29 28 24 23 22 21 20 16 15 12 11 10 9 5 4 0
* +---+---+---+-----------+------+---+------+--------+-----+------+------+
* | 0 | Q | U | 0 1 1 1 0 | size | 1 | Rm | opcode | 0 0 | Rn | Rd |
* +---+---+---+-----------+------+---+------+--------+-----+------+------+
*/
static void disas_simd_three_reg_diff(DisasContext *s, uint32_t insn)
{
/* Instructions in this group fall into three basic classes
* (in each case with the operation working on each element in
* the input vectors):
* (1) widening 64 x 64 -> 128 (with possibly Vd as an extra
* 128 bit input)
* (2) wide 64 x 128 -> 128
* (3) narrowing 128 x 128 -> 64
* Here we do initial decode, catch unallocated cases and
* dispatch to separate functions for each class.
*/
int is_q = extract32(insn, 30, 1);
int is_u = extract32(insn, 29, 1);
int size = extract32(insn, 22, 2);
int opcode = extract32(insn, 12, 4);
int rm = extract32(insn, 16, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
switch (opcode) {
case 1: /* SADDW, SADDW2, UADDW, UADDW2 */
case 3: /* SSUBW, SSUBW2, USUBW, USUBW2 */
/* 64 x 128 -> 128 */
if (size == 3) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_3rd_wide(s, is_q, is_u, size, opcode, rd, rn, rm);
break;
case 4: /* ADDHN, ADDHN2, RADDHN, RADDHN2 */
case 6: /* SUBHN, SUBHN2, RSUBHN, RSUBHN2 */
/* 128 x 128 -> 64 */
if (size == 3) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_3rd_narrowing(s, is_q, is_u, size, opcode, rd, rn, rm);
break;
case 14: /* PMULL, PMULL2 */
if (is_u) {
unallocated_encoding(s);
return;
}
switch (size) {
case 0: /* PMULL.P8 */
if (!fp_access_check(s)) {
return;
}
/* The Q field specifies lo/hi half input for this insn. */
gen_gvec_op3_ool(s, true, rd, rn, rm, is_q,
gen_helper_neon_pmull_h);
break;
case 3: /* PMULL.P64 */
if (!dc_isar_feature(aa64_pmull, s)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
/* The Q field specifies lo/hi half input for this insn. */
gen_gvec_op3_ool(s, true, rd, rn, rm, is_q,
gen_helper_gvec_pmull_q);
break;
default:
unallocated_encoding(s);
break;
}
return;
case 9: /* SQDMLAL, SQDMLAL2 */
case 11: /* SQDMLSL, SQDMLSL2 */
case 13: /* SQDMULL, SQDMULL2 */
if (is_u || size == 0) {
unallocated_encoding(s);
return;
}
/* fall through */
case 0: /* SADDL, SADDL2, UADDL, UADDL2 */
case 2: /* SSUBL, SSUBL2, USUBL, USUBL2 */
case 5: /* SABAL, SABAL2, UABAL, UABAL2 */
case 7: /* SABDL, SABDL2, UABDL, UABDL2 */
case 8: /* SMLAL, SMLAL2, UMLAL, UMLAL2 */
case 10: /* SMLSL, SMLSL2, UMLSL, UMLSL2 */
case 12: /* SMULL, SMULL2, UMULL, UMULL2 */
/* 64 x 64 -> 128 */
if (size == 3) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_3rd_widening(s, is_q, is_u, size, opcode, rd, rn, rm);
break;
default:
/* opcode 15 not allocated */
unallocated_encoding(s);
break;
}
}
/* Logic op (opcode == 3) subgroup of C3.6.16. */
static void disas_simd_3same_logic(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int rm = extract32(insn, 16, 5);
int size = extract32(insn, 22, 2);
bool is_u = extract32(insn, 29, 1);
bool is_q = extract32(insn, 30, 1);
if (!fp_access_check(s)) {
return;
}
switch (size + 4 * is_u) {
case 0: /* AND */
gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_and, 0);
return;
case 1: /* BIC */
gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_andc, 0);
return;
case 2: /* ORR */
gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_or, 0);
return;
case 3: /* ORN */
gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_orc, 0);
return;
case 4: /* EOR */
gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_xor, 0);
return;
case 5: /* BSL bitwise select */
gen_gvec_fn4(s, is_q, rd, rd, rn, rm, tcg_gen_gvec_bitsel, 0);
return;
case 6: /* BIT, bitwise insert if true */
gen_gvec_fn4(s, is_q, rd, rm, rn, rd, tcg_gen_gvec_bitsel, 0);
return;
case 7: /* BIF, bitwise insert if false */
gen_gvec_fn4(s, is_q, rd, rm, rd, rn, tcg_gen_gvec_bitsel, 0);
return;
default:
g_assert_not_reached();
}
}
/* Pairwise op subgroup of C3.6.16.
*
* This is called directly or via the handle_3same_float for float pairwise
* operations where the opcode and size are calculated differently.
*/
static void handle_simd_3same_pair(DisasContext *s, int is_q, int u, int opcode,
int size, int rn, int rm, int rd)
{
TCGv_ptr fpst;
int pass;
/* Floating point operations need fpst */
if (opcode >= 0x58) {
fpst = fpstatus_ptr(FPST_FPCR);
} else {
fpst = NULL;
}
if (!fp_access_check(s)) {
return;
}
/* These operations work on the concatenated rm:rn, with each pair of
* adjacent elements being operated on to produce an element in the result.
*/
if (size == 3) {
TCGv_i64 tcg_res[2];
for (pass = 0; pass < 2; pass++) {
TCGv_i64 tcg_op1 = tcg_temp_new_i64();
TCGv_i64 tcg_op2 = tcg_temp_new_i64();
int passreg = (pass == 0) ? rn : rm;
read_vec_element(s, tcg_op1, passreg, 0, MO_64);
read_vec_element(s, tcg_op2, passreg, 1, MO_64);
tcg_res[pass] = tcg_temp_new_i64();
switch (opcode) {
case 0x17: /* ADDP */
tcg_gen_add_i64(tcg_res[pass], tcg_op1, tcg_op2);
break;
case 0x58: /* FMAXNMP */
gen_helper_vfp_maxnumd(tcg_res[pass], tcg_op1, tcg_op2, fpst);
break;
case 0x5a: /* FADDP */
gen_helper_vfp_addd(tcg_res[pass], tcg_op1, tcg_op2, fpst);
break;
case 0x5e: /* FMAXP */
gen_helper_vfp_maxd(tcg_res[pass], tcg_op1, tcg_op2, fpst);
break;
case 0x78: /* FMINNMP */
gen_helper_vfp_minnumd(tcg_res[pass], tcg_op1, tcg_op2, fpst);
break;
case 0x7e: /* FMINP */
gen_helper_vfp_mind(tcg_res[pass], tcg_op1, tcg_op2, fpst);
break;
default:
g_assert_not_reached();
}
}
for (pass = 0; pass < 2; pass++) {
write_vec_element(s, tcg_res[pass], rd, pass, MO_64);
}
} else {
int maxpass = is_q ? 4 : 2;
TCGv_i32 tcg_res[4];
for (pass = 0; pass < maxpass; pass++) {
TCGv_i32 tcg_op1 = tcg_temp_new_i32();
TCGv_i32 tcg_op2 = tcg_temp_new_i32();
NeonGenTwoOpFn *genfn = NULL;
int passreg = pass < (maxpass / 2) ? rn : rm;
int passelt = (is_q && (pass & 1)) ? 2 : 0;
read_vec_element_i32(s, tcg_op1, passreg, passelt, MO_32);
read_vec_element_i32(s, tcg_op2, passreg, passelt + 1, MO_32);
tcg_res[pass] = tcg_temp_new_i32();
switch (opcode) {
case 0x17: /* ADDP */
{
static NeonGenTwoOpFn * const fns[3] = {
gen_helper_neon_padd_u8,
gen_helper_neon_padd_u16,
tcg_gen_add_i32,
};
genfn = fns[size];
break;
}
case 0x14: /* SMAXP, UMAXP */
{
static NeonGenTwoOpFn * const fns[3][2] = {
{ gen_helper_neon_pmax_s8, gen_helper_neon_pmax_u8 },
{ gen_helper_neon_pmax_s16, gen_helper_neon_pmax_u16 },
{ tcg_gen_smax_i32, tcg_gen_umax_i32 },
};
genfn = fns[size][u];
break;
}
case 0x15: /* SMINP, UMINP */
{
static NeonGenTwoOpFn * const fns[3][2] = {
{ gen_helper_neon_pmin_s8, gen_helper_neon_pmin_u8 },
{ gen_helper_neon_pmin_s16, gen_helper_neon_pmin_u16 },
{ tcg_gen_smin_i32, tcg_gen_umin_i32 },
};
genfn = fns[size][u];
break;
}
/* The FP operations are all on single floats (32 bit) */
case 0x58: /* FMAXNMP */
gen_helper_vfp_maxnums(tcg_res[pass], tcg_op1, tcg_op2, fpst);
break;
case 0x5a: /* FADDP */
gen_helper_vfp_adds(tcg_res[pass], tcg_op1, tcg_op2, fpst);
break;
case 0x5e: /* FMAXP */
gen_helper_vfp_maxs(tcg_res[pass], tcg_op1, tcg_op2, fpst);
break;
case 0x78: /* FMINNMP */
gen_helper_vfp_minnums(tcg_res[pass], tcg_op1, tcg_op2, fpst);
break;
case 0x7e: /* FMINP */
gen_helper_vfp_mins(tcg_res[pass], tcg_op1, tcg_op2, fpst);
break;
default:
g_assert_not_reached();
}
/* FP ops called directly, otherwise call now */
if (genfn) {
genfn(tcg_res[pass], tcg_op1, tcg_op2);
}
}
for (pass = 0; pass < maxpass; pass++) {
write_vec_element_i32(s, tcg_res[pass], rd, pass, MO_32);
}
clear_vec_high(s, is_q, rd);
}
}
/* Floating point op subgroup of C3.6.16. */
static void disas_simd_3same_float(DisasContext *s, uint32_t insn)
{
/* For floating point ops, the U, size[1] and opcode bits
* together indicate the operation. size[0] indicates single
* or double.
*/
int fpopcode = extract32(insn, 11, 5)
| (extract32(insn, 23, 1) << 5)
| (extract32(insn, 29, 1) << 6);
int is_q = extract32(insn, 30, 1);
int size = extract32(insn, 22, 1);
int rm = extract32(insn, 16, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
int datasize = is_q ? 128 : 64;
int esize = 32 << size;
int elements = datasize / esize;
if (size == 1 && !is_q) {
unallocated_encoding(s);
return;
}
switch (fpopcode) {
case 0x58: /* FMAXNMP */
case 0x5a: /* FADDP */
case 0x5e: /* FMAXP */
case 0x78: /* FMINNMP */
case 0x7e: /* FMINP */
if (size && !is_q) {
unallocated_encoding(s);
return;
}
handle_simd_3same_pair(s, is_q, 0, fpopcode, size ? MO_64 : MO_32,
rn, rm, rd);
return;
case 0x1b: /* FMULX */
case 0x1f: /* FRECPS */
case 0x3f: /* FRSQRTS */
case 0x5d: /* FACGE */
case 0x7d: /* FACGT */
case 0x19: /* FMLA */
case 0x39: /* FMLS */
case 0x18: /* FMAXNM */
case 0x1a: /* FADD */
case 0x1c: /* FCMEQ */
case 0x1e: /* FMAX */
case 0x38: /* FMINNM */
case 0x3a: /* FSUB */
case 0x3e: /* FMIN */
case 0x5b: /* FMUL */
case 0x5c: /* FCMGE */
case 0x5f: /* FDIV */
case 0x7a: /* FABD */
case 0x7c: /* FCMGT */
if (!fp_access_check(s)) {
return;
}
handle_3same_float(s, size, elements, fpopcode, rd, rn, rm);
return;
case 0x1d: /* FMLAL */
case 0x3d: /* FMLSL */
case 0x59: /* FMLAL2 */
case 0x79: /* FMLSL2 */
if (size & 1 || !dc_isar_feature(aa64_fhm, s)) {
unallocated_encoding(s);
return;
}
if (fp_access_check(s)) {
int is_s = extract32(insn, 23, 1);
int is_2 = extract32(insn, 29, 1);
int data = (is_2 << 1) | is_s;
tcg_gen_gvec_3_ptr(vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm), tcg_env,
is_q ? 16 : 8, vec_full_reg_size(s),
data, gen_helper_gvec_fmlal_a64);
}
return;
default:
unallocated_encoding(s);
return;
}
}
/* Integer op subgroup of C3.6.16. */
static void disas_simd_3same_int(DisasContext *s, uint32_t insn)
{
int is_q = extract32(insn, 30, 1);
int u = extract32(insn, 29, 1);
int size = extract32(insn, 22, 2);
int opcode = extract32(insn, 11, 5);
int rm = extract32(insn, 16, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
int pass;
TCGCond cond;
switch (opcode) {
case 0x13: /* MUL, PMUL */
if (u && size != 0) {
unallocated_encoding(s);
return;
}
/* fall through */
case 0x0: /* SHADD, UHADD */
case 0x2: /* SRHADD, URHADD */
case 0x4: /* SHSUB, UHSUB */
case 0xc: /* SMAX, UMAX */
case 0xd: /* SMIN, UMIN */
case 0xe: /* SABD, UABD */
case 0xf: /* SABA, UABA */
case 0x12: /* MLA, MLS */
if (size == 3) {
unallocated_encoding(s);
return;
}
break;
case 0x16: /* SQDMULH, SQRDMULH */
if (size == 0 || size == 3) {
unallocated_encoding(s);
return;
}
break;
default:
if (size == 3 && !is_q) {
unallocated_encoding(s);
return;
}
break;
}
if (!fp_access_check(s)) {
return;
}
switch (opcode) {
case 0x01: /* SQADD, UQADD */
if (u) {
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_uqadd_qc, size);
} else {
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_sqadd_qc, size);
}
return;
case 0x05: /* SQSUB, UQSUB */
if (u) {
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_uqsub_qc, size);
} else {
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_sqsub_qc, size);
}
return;
case 0x08: /* SSHL, USHL */
if (u) {
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_ushl, size);
} else {
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_sshl, size);
}
return;
case 0x0c: /* SMAX, UMAX */
if (u) {
gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_umax, size);
} else {
gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_smax, size);
}
return;
case 0x0d: /* SMIN, UMIN */
if (u) {
gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_umin, size);
} else {
gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_smin, size);
}
return;
case 0xe: /* SABD, UABD */
if (u) {
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_uabd, size);
} else {
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_sabd, size);
}
return;
case 0xf: /* SABA, UABA */
if (u) {
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_uaba, size);
} else {
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_saba, size);
}
return;
case 0x10: /* ADD, SUB */
if (u) {
gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_sub, size);
} else {
gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_add, size);
}
return;
case 0x13: /* MUL, PMUL */
if (!u) { /* MUL */
gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_mul, size);
} else { /* PMUL */
gen_gvec_op3_ool(s, is_q, rd, rn, rm, 0, gen_helper_gvec_pmul_b);
}
return;
case 0x12: /* MLA, MLS */
if (u) {
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_mls, size);
} else {
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_mla, size);
}
return;
case 0x16: /* SQDMULH, SQRDMULH */
{
static gen_helper_gvec_3_ptr * const fns[2][2] = {
{ gen_helper_neon_sqdmulh_h, gen_helper_neon_sqrdmulh_h },
{ gen_helper_neon_sqdmulh_s, gen_helper_neon_sqrdmulh_s },
};
gen_gvec_op3_qc(s, is_q, rd, rn, rm, fns[size - 1][u]);
}
return;
case 0x11:
if (!u) { /* CMTST */
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_cmtst, size);
return;
}
/* else CMEQ */
cond = TCG_COND_EQ;
goto do_gvec_cmp;
case 0x06: /* CMGT, CMHI */
cond = u ? TCG_COND_GTU : TCG_COND_GT;
goto do_gvec_cmp;
case 0x07: /* CMGE, CMHS */
cond = u ? TCG_COND_GEU : TCG_COND_GE;
do_gvec_cmp:
tcg_gen_gvec_cmp(cond, size, vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm),
is_q ? 16 : 8, vec_full_reg_size(s));
return;
}
if (size == 3) {
assert(is_q);
for (pass = 0; pass < 2; pass++) {
TCGv_i64 tcg_op1 = tcg_temp_new_i64();
TCGv_i64 tcg_op2 = tcg_temp_new_i64();
TCGv_i64 tcg_res = tcg_temp_new_i64();
read_vec_element(s, tcg_op1, rn, pass, MO_64);
read_vec_element(s, tcg_op2, rm, pass, MO_64);
handle_3same_64(s, opcode, u, tcg_res, tcg_op1, tcg_op2);
write_vec_element(s, tcg_res, rd, pass, MO_64);
}
} else {
for (pass = 0; pass < (is_q ? 4 : 2); pass++) {
TCGv_i32 tcg_op1 = tcg_temp_new_i32();
TCGv_i32 tcg_op2 = tcg_temp_new_i32();
TCGv_i32 tcg_res = tcg_temp_new_i32();
NeonGenTwoOpFn *genfn = NULL;
NeonGenTwoOpEnvFn *genenvfn = NULL;
read_vec_element_i32(s, tcg_op1, rn, pass, MO_32);
read_vec_element_i32(s, tcg_op2, rm, pass, MO_32);
switch (opcode) {
case 0x0: /* SHADD, UHADD */
{
static NeonGenTwoOpFn * const fns[3][2] = {
{ gen_helper_neon_hadd_s8, gen_helper_neon_hadd_u8 },
{ gen_helper_neon_hadd_s16, gen_helper_neon_hadd_u16 },
{ gen_helper_neon_hadd_s32, gen_helper_neon_hadd_u32 },
};
genfn = fns[size][u];
break;
}
case 0x2: /* SRHADD, URHADD */
{
static NeonGenTwoOpFn * const fns[3][2] = {
{ gen_helper_neon_rhadd_s8, gen_helper_neon_rhadd_u8 },
{ gen_helper_neon_rhadd_s16, gen_helper_neon_rhadd_u16 },
{ gen_helper_neon_rhadd_s32, gen_helper_neon_rhadd_u32 },
};
genfn = fns[size][u];
break;
}
case 0x4: /* SHSUB, UHSUB */
{
static NeonGenTwoOpFn * const fns[3][2] = {
{ gen_helper_neon_hsub_s8, gen_helper_neon_hsub_u8 },
{ gen_helper_neon_hsub_s16, gen_helper_neon_hsub_u16 },
{ gen_helper_neon_hsub_s32, gen_helper_neon_hsub_u32 },
};
genfn = fns[size][u];
break;
}
case 0x9: /* SQSHL, UQSHL */
{
static NeonGenTwoOpEnvFn * const fns[3][2] = {
{ gen_helper_neon_qshl_s8, gen_helper_neon_qshl_u8 },
{ gen_helper_neon_qshl_s16, gen_helper_neon_qshl_u16 },
{ gen_helper_neon_qshl_s32, gen_helper_neon_qshl_u32 },
};
genenvfn = fns[size][u];
break;
}
case 0xa: /* SRSHL, URSHL */
{
static NeonGenTwoOpFn * const fns[3][2] = {
{ gen_helper_neon_rshl_s8, gen_helper_neon_rshl_u8 },
{ gen_helper_neon_rshl_s16, gen_helper_neon_rshl_u16 },
{ gen_helper_neon_rshl_s32, gen_helper_neon_rshl_u32 },
};
genfn = fns[size][u];
break;
}
case 0xb: /* SQRSHL, UQRSHL */
{
static NeonGenTwoOpEnvFn * const fns[3][2] = {
{ gen_helper_neon_qrshl_s8, gen_helper_neon_qrshl_u8 },
{ gen_helper_neon_qrshl_s16, gen_helper_neon_qrshl_u16 },
{ gen_helper_neon_qrshl_s32, gen_helper_neon_qrshl_u32 },
};
genenvfn = fns[size][u];
break;
}
default:
g_assert_not_reached();
}
if (genenvfn) {
genenvfn(tcg_res, tcg_env, tcg_op1, tcg_op2);
} else {
genfn(tcg_res, tcg_op1, tcg_op2);
}
write_vec_element_i32(s, tcg_res, rd, pass, MO_32);
}
}
clear_vec_high(s, is_q, rd);
}
/* AdvSIMD three same
* 31 30 29 28 24 23 22 21 20 16 15 11 10 9 5 4 0
* +---+---+---+-----------+------+---+------+--------+---+------+------+
* | 0 | Q | U | 0 1 1 1 0 | size | 1 | Rm | opcode | 1 | Rn | Rd |
* +---+---+---+-----------+------+---+------+--------+---+------+------+
*/
static void disas_simd_three_reg_same(DisasContext *s, uint32_t insn)
{
int opcode = extract32(insn, 11, 5);
switch (opcode) {
case 0x3: /* logic ops */
disas_simd_3same_logic(s, insn);
break;
case 0x17: /* ADDP */
case 0x14: /* SMAXP, UMAXP */
case 0x15: /* SMINP, UMINP */
{
/* Pairwise operations */
int is_q = extract32(insn, 30, 1);
int u = extract32(insn, 29, 1);
int size = extract32(insn, 22, 2);
int rm = extract32(insn, 16, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
if (opcode == 0x17) {
if (u || (size == 3 && !is_q)) {
unallocated_encoding(s);
return;
}
} else {
if (size == 3) {
unallocated_encoding(s);
return;
}
}
handle_simd_3same_pair(s, is_q, u, opcode, size, rn, rm, rd);
break;
}
case 0x18 ... 0x31:
/* floating point ops, sz[1] and U are part of opcode */
disas_simd_3same_float(s, insn);
break;
default:
disas_simd_3same_int(s, insn);
break;
}
}
/*
* Advanced SIMD three same (ARMv8.2 FP16 variants)
*
* 31 30 29 28 24 23 22 21 20 16 15 14 13 11 10 9 5 4 0
* +---+---+---+-----------+---------+------+-----+--------+---+------+------+
* | 0 | Q | U | 0 1 1 1 0 | a | 1 0 | Rm | 0 0 | opcode | 1 | Rn | Rd |
* +---+---+---+-----------+---------+------+-----+--------+---+------+------+
*
* This includes FMULX, FCMEQ (register), FRECPS, FRSQRTS, FCMGE
* (register), FACGE, FABD, FCMGT (register) and FACGT.
*
*/
static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
{
int opcode = extract32(insn, 11, 3);
int u = extract32(insn, 29, 1);
int a = extract32(insn, 23, 1);
int is_q = extract32(insn, 30, 1);
int rm = extract32(insn, 16, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
/*
* For these floating point ops, the U, a and opcode bits
* together indicate the operation.
*/
int fpopcode = opcode | (a << 3) | (u << 4);
int datasize = is_q ? 128 : 64;
int elements = datasize / 16;
bool pairwise;
TCGv_ptr fpst;
int pass;
switch (fpopcode) {
case 0x0: /* FMAXNM */
case 0x1: /* FMLA */
case 0x2: /* FADD */
case 0x3: /* FMULX */
case 0x4: /* FCMEQ */
case 0x6: /* FMAX */
case 0x7: /* FRECPS */
case 0x8: /* FMINNM */
case 0x9: /* FMLS */
case 0xa: /* FSUB */
case 0xe: /* FMIN */
case 0xf: /* FRSQRTS */
case 0x13: /* FMUL */
case 0x14: /* FCMGE */
case 0x15: /* FACGE */
case 0x17: /* FDIV */
case 0x1a: /* FABD */
case 0x1c: /* FCMGT */
case 0x1d: /* FACGT */
pairwise = false;
break;
case 0x10: /* FMAXNMP */
case 0x12: /* FADDP */
case 0x16: /* FMAXP */
case 0x18: /* FMINNMP */
case 0x1e: /* FMINP */
pairwise = true;
break;
default:
unallocated_encoding(s);
return;
}
if (!dc_isar_feature(aa64_fp16, s)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
fpst = fpstatus_ptr(FPST_FPCR_F16);
if (pairwise) {
int maxpass = is_q ? 8 : 4;
TCGv_i32 tcg_op1 = tcg_temp_new_i32();
TCGv_i32 tcg_op2 = tcg_temp_new_i32();
TCGv_i32 tcg_res[8];
for (pass = 0; pass < maxpass; pass++) {
int passreg = pass < (maxpass / 2) ? rn : rm;
int passelt = (pass << 1) & (maxpass - 1);
read_vec_element_i32(s, tcg_op1, passreg, passelt, MO_16);
read_vec_element_i32(s, tcg_op2, passreg, passelt + 1, MO_16);
tcg_res[pass] = tcg_temp_new_i32();
switch (fpopcode) {
case 0x10: /* FMAXNMP */
gen_helper_advsimd_maxnumh(tcg_res[pass], tcg_op1, tcg_op2,
fpst);
break;
case 0x12: /* FADDP */
gen_helper_advsimd_addh(tcg_res[pass], tcg_op1, tcg_op2, fpst);
break;
case 0x16: /* FMAXP */
gen_helper_advsimd_maxh(tcg_res[pass], tcg_op1, tcg_op2, fpst);
break;
case 0x18: /* FMINNMP */
gen_helper_advsimd_minnumh(tcg_res[pass], tcg_op1, tcg_op2,
fpst);
break;
case 0x1e: /* FMINP */
gen_helper_advsimd_minh(tcg_res[pass], tcg_op1, tcg_op2, fpst);
break;
default:
g_assert_not_reached();
}
}
for (pass = 0; pass < maxpass; pass++) {
write_vec_element_i32(s, tcg_res[pass], rd, pass, MO_16);
}
} else {
for (pass = 0; pass < elements; pass++) {
TCGv_i32 tcg_op1 = tcg_temp_new_i32();
TCGv_i32 tcg_op2 = tcg_temp_new_i32();
TCGv_i32 tcg_res = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_op1, rn, pass, MO_16);
read_vec_element_i32(s, tcg_op2, rm, pass, MO_16);
switch (fpopcode) {
case 0x0: /* FMAXNM */
gen_helper_advsimd_maxnumh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1: /* FMLA */
read_vec_element_i32(s, tcg_res, rd, pass, MO_16);
gen_helper_advsimd_muladdh(tcg_res, tcg_op1, tcg_op2, tcg_res,
fpst);
break;
case 0x2: /* FADD */
gen_helper_advsimd_addh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x3: /* FMULX */
gen_helper_advsimd_mulxh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x4: /* FCMEQ */
gen_helper_advsimd_ceq_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x6: /* FMAX */
gen_helper_advsimd_maxh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x7: /* FRECPS */
gen_helper_recpsf_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x8: /* FMINNM */
gen_helper_advsimd_minnumh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x9: /* FMLS */
/* As usual for ARM, separate negation for fused multiply-add */
tcg_gen_xori_i32(tcg_op1, tcg_op1, 0x8000);
read_vec_element_i32(s, tcg_res, rd, pass, MO_16);
gen_helper_advsimd_muladdh(tcg_res, tcg_op1, tcg_op2, tcg_res,
fpst);
break;
case 0xa: /* FSUB */
gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0xe: /* FMIN */
gen_helper_advsimd_minh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0xf: /* FRSQRTS */
gen_helper_rsqrtsf_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x13: /* FMUL */
gen_helper_advsimd_mulh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x14: /* FCMGE */
gen_helper_advsimd_cge_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x15: /* FACGE */
gen_helper_advsimd_acge_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x17: /* FDIV */
gen_helper_advsimd_divh(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1a: /* FABD */
gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst);
tcg_gen_andi_i32(tcg_res, tcg_res, 0x7fff);
break;
case 0x1c: /* FCMGT */
gen_helper_advsimd_cgt_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1d: /* FACGT */
gen_helper_advsimd_acgt_f16(tcg_res, tcg_op1, tcg_op2, fpst);
break;
default:
g_assert_not_reached();
}
write_vec_element_i32(s, tcg_res, rd, pass, MO_16);
}
}
clear_vec_high(s, is_q, rd);
}
/* AdvSIMD three same extra
* 31 30 29 28 24 23 22 21 20 16 15 14 11 10 9 5 4 0
* +---+---+---+-----------+------+---+------+---+--------+---+----+----+
* | 0 | Q | U | 0 1 1 1 0 | size | 0 | Rm | 1 | opcode | 1 | Rn | Rd |
* +---+---+---+-----------+------+---+------+---+--------+---+----+----+
*/
static void disas_simd_three_reg_same_extra(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int opcode = extract32(insn, 11, 4);
int rm = extract32(insn, 16, 5);
int size = extract32(insn, 22, 2);
bool u = extract32(insn, 29, 1);
bool is_q = extract32(insn, 30, 1);
bool feature;
int rot;
switch (u * 16 + opcode) {
case 0x10: /* SQRDMLAH (vector) */
case 0x11: /* SQRDMLSH (vector) */
if (size != 1 && size != 2) {
unallocated_encoding(s);
return;
}
feature = dc_isar_feature(aa64_rdm, s);
break;
case 0x02: /* SDOT (vector) */
case 0x12: /* UDOT (vector) */
if (size != MO_32) {
unallocated_encoding(s);
return;
}
feature = dc_isar_feature(aa64_dp, s);
break;
case 0x03: /* USDOT */
if (size != MO_32) {
unallocated_encoding(s);
return;
}
feature = dc_isar_feature(aa64_i8mm, s);
break;
case 0x04: /* SMMLA */
case 0x14: /* UMMLA */
case 0x05: /* USMMLA */
if (!is_q || size != MO_32) {
unallocated_encoding(s);
return;
}
feature = dc_isar_feature(aa64_i8mm, s);
break;
case 0x18: /* FCMLA, #0 */
case 0x19: /* FCMLA, #90 */
case 0x1a: /* FCMLA, #180 */
case 0x1b: /* FCMLA, #270 */
case 0x1c: /* FCADD, #90 */
case 0x1e: /* FCADD, #270 */
if (size == 0
|| (size == 1 && !dc_isar_feature(aa64_fp16, s))
|| (size == 3 && !is_q)) {
unallocated_encoding(s);
return;
}
feature = dc_isar_feature(aa64_fcma, s);
break;
case 0x1d: /* BFMMLA */
if (size != MO_16 || !is_q) {
unallocated_encoding(s);
return;
}
feature = dc_isar_feature(aa64_bf16, s);
break;
case 0x1f:
switch (size) {
case 1: /* BFDOT */
case 3: /* BFMLAL{B,T} */
feature = dc_isar_feature(aa64_bf16, s);
break;
default:
unallocated_encoding(s);
return;
}
break;
default:
unallocated_encoding(s);
return;
}
if (!feature) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
switch (opcode) {
case 0x0: /* SQRDMLAH (vector) */
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_sqrdmlah_qc, size);
return;
case 0x1: /* SQRDMLSH (vector) */
gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_sqrdmlsh_qc, size);
return;
case 0x2: /* SDOT / UDOT */
gen_gvec_op4_ool(s, is_q, rd, rn, rm, rd, 0,
u ? gen_helper_gvec_udot_b : gen_helper_gvec_sdot_b);
return;
case 0x3: /* USDOT */
gen_gvec_op4_ool(s, is_q, rd, rn, rm, rd, 0, gen_helper_gvec_usdot_b);
return;
case 0x04: /* SMMLA, UMMLA */
gen_gvec_op4_ool(s, 1, rd, rn, rm, rd, 0,
u ? gen_helper_gvec_ummla_b
: gen_helper_gvec_smmla_b);
return;
case 0x05: /* USMMLA */
gen_gvec_op4_ool(s, 1, rd, rn, rm, rd, 0, gen_helper_gvec_usmmla_b);
return;
case 0x8: /* FCMLA, #0 */
case 0x9: /* FCMLA, #90 */
case 0xa: /* FCMLA, #180 */
case 0xb: /* FCMLA, #270 */
rot = extract32(opcode, 0, 2);
switch (size) {
case 1:
gen_gvec_op4_fpst(s, is_q, rd, rn, rm, rd, true, rot,
gen_helper_gvec_fcmlah);
break;
case 2:
gen_gvec_op4_fpst(s, is_q, rd, rn, rm, rd, false, rot,
gen_helper_gvec_fcmlas);
break;
case 3:
gen_gvec_op4_fpst(s, is_q, rd, rn, rm, rd, false, rot,
gen_helper_gvec_fcmlad);
break;
default:
g_assert_not_reached();
}
return;
case 0xc: /* FCADD, #90 */
case 0xe: /* FCADD, #270 */
rot = extract32(opcode, 1, 1);
switch (size) {
case 1:
gen_gvec_op3_fpst(s, is_q, rd, rn, rm, size == 1, rot,
gen_helper_gvec_fcaddh);
break;
case 2:
gen_gvec_op3_fpst(s, is_q, rd, rn, rm, size == 1, rot,
gen_helper_gvec_fcadds);
break;
case 3:
gen_gvec_op3_fpst(s, is_q, rd, rn, rm, size == 1, rot,
gen_helper_gvec_fcaddd);
break;
default:
g_assert_not_reached();
}
return;
case 0xd: /* BFMMLA */
gen_gvec_op4_ool(s, is_q, rd, rn, rm, rd, 0, gen_helper_gvec_bfmmla);
return;
case 0xf:
switch (size) {
case 1: /* BFDOT */
gen_gvec_op4_ool(s, is_q, rd, rn, rm, rd, 0, gen_helper_gvec_bfdot);
break;
case 3: /* BFMLAL{B,T} */
gen_gvec_op4_fpst(s, 1, rd, rn, rm, rd, false, is_q,
gen_helper_gvec_bfmlal);
break;
default:
g_assert_not_reached();
}
return;
default:
g_assert_not_reached();
}
}
static void handle_2misc_widening(DisasContext *s, int opcode, bool is_q,
int size, int rn, int rd)
{
/* Handle 2-reg-misc ops which are widening (so each size element
* in the source becomes a 2*size element in the destination.
* The only instruction like this is FCVTL.
*/
int pass;
if (size == 3) {
/* 32 -> 64 bit fp conversion */
TCGv_i64 tcg_res[2];
int srcelt = is_q ? 2 : 0;
for (pass = 0; pass < 2; pass++) {
TCGv_i32 tcg_op = tcg_temp_new_i32();
tcg_res[pass] = tcg_temp_new_i64();
read_vec_element_i32(s, tcg_op, rn, srcelt + pass, MO_32);
gen_helper_vfp_fcvtds(tcg_res[pass], tcg_op, tcg_env);
}
for (pass = 0; pass < 2; pass++) {
write_vec_element(s, tcg_res[pass], rd, pass, MO_64);
}
} else {
/* 16 -> 32 bit fp conversion */
int srcelt = is_q ? 4 : 0;
TCGv_i32 tcg_res[4];
TCGv_ptr fpst = fpstatus_ptr(FPST_FPCR);
TCGv_i32 ahp = get_ahp_flag();
for (pass = 0; pass < 4; pass++) {
tcg_res[pass] = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_res[pass], rn, srcelt + pass, MO_16);
gen_helper_vfp_fcvt_f16_to_f32(tcg_res[pass], tcg_res[pass],
fpst, ahp);
}
for (pass = 0; pass < 4; pass++) {
write_vec_element_i32(s, tcg_res[pass], rd, pass, MO_32);
}
}
}
static void handle_rev(DisasContext *s, int opcode, bool u,
bool is_q, int size, int rn, int rd)
{
int op = (opcode << 1) | u;
int opsz = op + size;
int grp_size = 3 - opsz;
int dsize = is_q ? 128 : 64;
int i;
if (opsz >= 3) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
if (size == 0) {
/* Special case bytes, use bswap op on each group of elements */
int groups = dsize / (8 << grp_size);
for (i = 0; i < groups; i++) {
TCGv_i64 tcg_tmp = tcg_temp_new_i64();
read_vec_element(s, tcg_tmp, rn, i, grp_size);
switch (grp_size) {
case MO_16:
tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp, TCG_BSWAP_IZ);
break;
case MO_32:
tcg_gen_bswap32_i64(tcg_tmp, tcg_tmp, TCG_BSWAP_IZ);
break;
case MO_64:
tcg_gen_bswap64_i64(tcg_tmp, tcg_tmp);
break;
default:
g_assert_not_reached();
}
write_vec_element(s, tcg_tmp, rd, i, grp_size);
}
clear_vec_high(s, is_q, rd);
} else {
int revmask = (1 << grp_size) - 1;
int esize = 8 << size;
int elements = dsize / esize;
TCGv_i64 tcg_rn = tcg_temp_new_i64();
TCGv_i64 tcg_rd[2];
for (i = 0; i < 2; i++) {
tcg_rd[i] = tcg_temp_new_i64();
tcg_gen_movi_i64(tcg_rd[i], 0);
}
for (i = 0; i < elements; i++) {
int e_rev = (i & 0xf) ^ revmask;
int w = (e_rev * esize) / 64;
int o = (e_rev * esize) % 64;
read_vec_element(s, tcg_rn, rn, i, size);
tcg_gen_deposit_i64(tcg_rd[w], tcg_rd[w], tcg_rn, o, esize);
}
for (i = 0; i < 2; i++) {
write_vec_element(s, tcg_rd[i], rd, i, MO_64);
}
clear_vec_high(s, true, rd);
}
}
static void handle_2misc_pairwise(DisasContext *s, int opcode, bool u,
bool is_q, int size, int rn, int rd)
{
/* Implement the pairwise operations from 2-misc:
* SADDLP, UADDLP, SADALP, UADALP.
* These all add pairs of elements in the input to produce a
* double-width result element in the output (possibly accumulating).
*/
bool accum = (opcode == 0x6);
int maxpass = is_q ? 2 : 1;
int pass;
TCGv_i64 tcg_res[2];
if (size == 2) {
/* 32 + 32 -> 64 op */
MemOp memop = size + (u ? 0 : MO_SIGN);
for (pass = 0; pass < maxpass; pass++) {
TCGv_i64 tcg_op1 = tcg_temp_new_i64();
TCGv_i64 tcg_op2 = tcg_temp_new_i64();
tcg_res[pass] = tcg_temp_new_i64();
read_vec_element(s, tcg_op1, rn, pass * 2, memop);
read_vec_element(s, tcg_op2, rn, pass * 2 + 1, memop);
tcg_gen_add_i64(tcg_res[pass], tcg_op1, tcg_op2);
if (accum) {
read_vec_element(s, tcg_op1, rd, pass, MO_64);
tcg_gen_add_i64(tcg_res[pass], tcg_res[pass], tcg_op1);
}
}
} else {
for (pass = 0; pass < maxpass; pass++) {
TCGv_i64 tcg_op = tcg_temp_new_i64();
NeonGenOne64OpFn *genfn;
static NeonGenOne64OpFn * const fns[2][2] = {
{ gen_helper_neon_addlp_s8, gen_helper_neon_addlp_u8 },
{ gen_helper_neon_addlp_s16, gen_helper_neon_addlp_u16 },
};
genfn = fns[size][u];
tcg_res[pass] = tcg_temp_new_i64();
read_vec_element(s, tcg_op, rn, pass, MO_64);
genfn(tcg_res[pass], tcg_op);
if (accum) {
read_vec_element(s, tcg_op, rd, pass, MO_64);
if (size == 0) {
gen_helper_neon_addl_u16(tcg_res[pass],
tcg_res[pass], tcg_op);
} else {
gen_helper_neon_addl_u32(tcg_res[pass],
tcg_res[pass], tcg_op);
}
}
}
}
if (!is_q) {
tcg_res[1] = tcg_constant_i64(0);
}
for (pass = 0; pass < 2; pass++) {
write_vec_element(s, tcg_res[pass], rd, pass, MO_64);
}
}
static void handle_shll(DisasContext *s, bool is_q, int size, int rn, int rd)
{
/* Implement SHLL and SHLL2 */
int pass;
int part = is_q ? 2 : 0;
TCGv_i64 tcg_res[2];
for (pass = 0; pass < 2; pass++) {
static NeonGenWidenFn * const widenfns[3] = {
gen_helper_neon_widen_u8,
gen_helper_neon_widen_u16,
tcg_gen_extu_i32_i64,
};
NeonGenWidenFn *widenfn = widenfns[size];
TCGv_i32 tcg_op = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_op, rn, part + pass, MO_32);
tcg_res[pass] = tcg_temp_new_i64();
widenfn(tcg_res[pass], tcg_op);
tcg_gen_shli_i64(tcg_res[pass], tcg_res[pass], 8 << size);
}
for (pass = 0; pass < 2; pass++) {
write_vec_element(s, tcg_res[pass], rd, pass, MO_64);
}
}
/* AdvSIMD two reg misc
* 31 30 29 28 24 23 22 21 17 16 12 11 10 9 5 4 0
* +---+---+---+-----------+------+-----------+--------+-----+------+------+
* | 0 | Q | U | 0 1 1 1 0 | size | 1 0 0 0 0 | opcode | 1 0 | Rn | Rd |
* +---+---+---+-----------+------+-----------+--------+-----+------+------+
*/
static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
{
int size = extract32(insn, 22, 2);
int opcode = extract32(insn, 12, 5);
bool u = extract32(insn, 29, 1);
bool is_q = extract32(insn, 30, 1);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
bool need_fpstatus = false;
int rmode = -1;
TCGv_i32 tcg_rmode;
TCGv_ptr tcg_fpstatus;
switch (opcode) {
case 0x0: /* REV64, REV32 */
case 0x1: /* REV16 */
handle_rev(s, opcode, u, is_q, size, rn, rd);
return;
case 0x5: /* CNT, NOT, RBIT */
if (u && size == 0) {
/* NOT */
break;
} else if (u && size == 1) {
/* RBIT */
break;
} else if (!u && size == 0) {
/* CNT */
break;
}
unallocated_encoding(s);
return;
case 0x12: /* XTN, XTN2, SQXTUN, SQXTUN2 */
case 0x14: /* SQXTN, SQXTN2, UQXTN, UQXTN2 */
if (size == 3) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_2misc_narrow(s, false, opcode, u, is_q, size, rn, rd);
return;
case 0x4: /* CLS, CLZ */
if (size == 3) {
unallocated_encoding(s);
return;
}
break;
case 0x2: /* SADDLP, UADDLP */
case 0x6: /* SADALP, UADALP */
if (size == 3) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_2misc_pairwise(s, opcode, u, is_q, size, rn, rd);
return;
case 0x13: /* SHLL, SHLL2 */
if (u == 0 || size == 3) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_shll(s, is_q, size, rn, rd);
return;
case 0xa: /* CMLT */
if (u == 1) {
unallocated_encoding(s);
return;
}
/* fall through */
case 0x8: /* CMGT, CMGE */
case 0x9: /* CMEQ, CMLE */
case 0xb: /* ABS, NEG */
if (size == 3 && !is_q) {
unallocated_encoding(s);
return;
}
break;
case 0x3: /* SUQADD, USQADD */
if (size == 3 && !is_q) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_2misc_satacc(s, false, u, is_q, size, rn, rd);
return;
case 0x7: /* SQABS, SQNEG */
if (size == 3 && !is_q) {
unallocated_encoding(s);
return;
}
break;
case 0xc ... 0xf:
case 0x16 ... 0x1f:
{
/* Floating point: U, size[1] and opcode indicate operation;
* size[0] indicates single or double precision.
*/
int is_double = extract32(size, 0, 1);
opcode |= (extract32(size, 1, 1) << 5) | (u << 6);
size = is_double ? 3 : 2;
switch (opcode) {
case 0x2f: /* FABS */
case 0x6f: /* FNEG */
if (size == 3 && !is_q) {
unallocated_encoding(s);
return;
}
break;
case 0x1d: /* SCVTF */
case 0x5d: /* UCVTF */
{
bool is_signed = (opcode == 0x1d) ? true : false;
int elements = is_double ? 2 : is_q ? 4 : 2;
if (is_double && !is_q) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_simd_intfp_conv(s, rd, rn, elements, is_signed, 0, size);
return;
}
case 0x2c: /* FCMGT (zero) */
case 0x2d: /* FCMEQ (zero) */
case 0x2e: /* FCMLT (zero) */
case 0x6c: /* FCMGE (zero) */
case 0x6d: /* FCMLE (zero) */
if (size == 3 && !is_q) {
unallocated_encoding(s);
return;
}
handle_2misc_fcmp_zero(s, opcode, false, u, is_q, size, rn, rd);
return;
case 0x7f: /* FSQRT */
if (size == 3 && !is_q) {
unallocated_encoding(s);
return;
}
break;
case 0x1a: /* FCVTNS */
case 0x1b: /* FCVTMS */
case 0x3a: /* FCVTPS */
case 0x3b: /* FCVTZS */
case 0x5a: /* FCVTNU */
case 0x5b: /* FCVTMU */
case 0x7a: /* FCVTPU */
case 0x7b: /* FCVTZU */
need_fpstatus = true;
rmode = extract32(opcode, 5, 1) | (extract32(opcode, 0, 1) << 1);
if (size == 3 && !is_q) {
unallocated_encoding(s);
return;
}
break;
case 0x5c: /* FCVTAU */
case 0x1c: /* FCVTAS */
need_fpstatus = true;
rmode = FPROUNDING_TIEAWAY;
if (size == 3 && !is_q) {
unallocated_encoding(s);
return;
}
break;
case 0x3c: /* URECPE */
if (size == 3) {
unallocated_encoding(s);
return;
}
/* fall through */
case 0x3d: /* FRECPE */
case 0x7d: /* FRSQRTE */
if (size == 3 && !is_q) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_2misc_reciprocal(s, opcode, false, u, is_q, size, rn, rd);
return;
case 0x56: /* FCVTXN, FCVTXN2 */
if (size == 2) {
unallocated_encoding(s);
return;
}
/* fall through */
case 0x16: /* FCVTN, FCVTN2 */
/* handle_2misc_narrow does a 2*size -> size operation, but these
* instructions encode the source size rather than dest size.
*/
if (!fp_access_check(s)) {
return;
}
handle_2misc_narrow(s, false, opcode, 0, is_q, size - 1, rn, rd);
return;
case 0x36: /* BFCVTN, BFCVTN2 */
if (!dc_isar_feature(aa64_bf16, s) || size != 2) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
handle_2misc_narrow(s, false, opcode, 0, is_q, size - 1, rn, rd);
return;
case 0x17: /* FCVTL, FCVTL2 */
if (!fp_access_check(s)) {
return;
}
handle_2misc_widening(s, opcode, is_q, size, rn, rd);
return;
case 0x18: /* FRINTN */
case 0x19: /* FRINTM */
case 0x38: /* FRINTP */
case 0x39: /* FRINTZ */
rmode = extract32(opcode, 5, 1) | (extract32(opcode, 0, 1) << 1);
/* fall through */
case 0x59: /* FRINTX */
case 0x79: /* FRINTI */
need_fpstatus = true;
if (size == 3 && !is_q) {
unallocated_encoding(s);
return;
}
break;
case 0x58: /* FRINTA */
rmode = FPROUNDING_TIEAWAY;
need_fpstatus = true;
if (size == 3 && !is_q) {
unallocated_encoding(s);
return;
}
break;
case 0x7c: /* URSQRTE */
if (size == 3) {
unallocated_encoding(s);
return;
}
break;
case 0x1e: /* FRINT32Z */
case 0x1f: /* FRINT64Z */
rmode = FPROUNDING_ZERO;
/* fall through */
case 0x5e: /* FRINT32X */
case 0x5f: /* FRINT64X */
need_fpstatus = true;
if ((size == 3 && !is_q) || !dc_isar_feature(aa64_frint, s)) {
unallocated_encoding(s);
return;
}
break;
default:
unallocated_encoding(s);
return;
}
break;
}
default:
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
if (need_fpstatus || rmode >= 0) {
tcg_fpstatus = fpstatus_ptr(FPST_FPCR);
} else {
tcg_fpstatus = NULL;
}
if (rmode >= 0) {
tcg_rmode = gen_set_rmode(rmode, tcg_fpstatus);
} else {
tcg_rmode = NULL;
}
switch (opcode) {
case 0x5:
if (u && size == 0) { /* NOT */
gen_gvec_fn2(s, is_q, rd, rn, tcg_gen_gvec_not, 0);
return;
}
break;
case 0x8: /* CMGT, CMGE */
if (u) {
gen_gvec_fn2(s, is_q, rd, rn, gen_gvec_cge0, size);
} else {
gen_gvec_fn2(s, is_q, rd, rn, gen_gvec_cgt0, size);
}
return;
case 0x9: /* CMEQ, CMLE */
if (u) {
gen_gvec_fn2(s, is_q, rd, rn, gen_gvec_cle0, size);
} else {
gen_gvec_fn2(s, is_q, rd, rn, gen_gvec_ceq0, size);
}
return;
case 0xa: /* CMLT */
gen_gvec_fn2(s, is_q, rd, rn, gen_gvec_clt0, size);
return;
case 0xb:
if (u) { /* ABS, NEG */
gen_gvec_fn2(s, is_q, rd, rn, tcg_gen_gvec_neg, size);
} else {
gen_gvec_fn2(s, is_q, rd, rn, tcg_gen_gvec_abs, size);
}
return;
}
if (size == 3) {
/* All 64-bit element operations can be shared with scalar 2misc */
int pass;
/* Coverity claims (size == 3 && !is_q) has been eliminated
* from all paths leading to here.
*/
tcg_debug_assert(is_q);
for (pass = 0; pass < 2; pass++) {
TCGv_i64 tcg_op = tcg_temp_new_i64();
TCGv_i64 tcg_res = tcg_temp_new_i64();
read_vec_element(s, tcg_op, rn, pass, MO_64);
handle_2misc_64(s, opcode, u, tcg_res, tcg_op,
tcg_rmode, tcg_fpstatus);
write_vec_element(s, tcg_res, rd, pass, MO_64);
}
} else {
int pass;
for (pass = 0; pass < (is_q ? 4 : 2); pass++) {
TCGv_i32 tcg_op = tcg_temp_new_i32();
TCGv_i32 tcg_res = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_op, rn, pass, MO_32);
if (size == 2) {
/* Special cases for 32 bit elements */
switch (opcode) {
case 0x4: /* CLS */
if (u) {
tcg_gen_clzi_i32(tcg_res, tcg_op, 32);
} else {
tcg_gen_clrsb_i32(tcg_res, tcg_op);
}
break;
case 0x7: /* SQABS, SQNEG */
if (u) {
gen_helper_neon_qneg_s32(tcg_res, tcg_env, tcg_op);
} else {
gen_helper_neon_qabs_s32(tcg_res, tcg_env, tcg_op);
}
break;
case 0x2f: /* FABS */
gen_helper_vfp_abss(tcg_res, tcg_op);
break;
case 0x6f: /* FNEG */
gen_helper_vfp_negs(tcg_res, tcg_op);
break;
case 0x7f: /* FSQRT */
gen_helper_vfp_sqrts(tcg_res, tcg_op, tcg_env);
break;
case 0x1a: /* FCVTNS */
case 0x1b: /* FCVTMS */
case 0x1c: /* FCVTAS */
case 0x3a: /* FCVTPS */
case 0x3b: /* FCVTZS */
gen_helper_vfp_tosls(tcg_res, tcg_op,
tcg_constant_i32(0), tcg_fpstatus);
break;
case 0x5a: /* FCVTNU */
case 0x5b: /* FCVTMU */
case 0x5c: /* FCVTAU */
case 0x7a: /* FCVTPU */
case 0x7b: /* FCVTZU */
gen_helper_vfp_touls(tcg_res, tcg_op,
tcg_constant_i32(0), tcg_fpstatus);
break;
case 0x18: /* FRINTN */
case 0x19: /* FRINTM */
case 0x38: /* FRINTP */
case 0x39: /* FRINTZ */
case 0x58: /* FRINTA */
case 0x79: /* FRINTI */
gen_helper_rints(tcg_res, tcg_op, tcg_fpstatus);
break;
case 0x59: /* FRINTX */
gen_helper_rints_exact(tcg_res, tcg_op, tcg_fpstatus);
break;
case 0x7c: /* URSQRTE */
gen_helper_rsqrte_u32(tcg_res, tcg_op);
break;
case 0x1e: /* FRINT32Z */
case 0x5e: /* FRINT32X */
gen_helper_frint32_s(tcg_res, tcg_op, tcg_fpstatus);
break;
case 0x1f: /* FRINT64Z */
case 0x5f: /* FRINT64X */
gen_helper_frint64_s(tcg_res, tcg_op, tcg_fpstatus);
break;
default:
g_assert_not_reached();
}
} else {
/* Use helpers for 8 and 16 bit elements */
switch (opcode) {
case 0x5: /* CNT, RBIT */
/* For these two insns size is part of the opcode specifier
* (handled earlier); they always operate on byte elements.
*/
if (u) {
gen_helper_neon_rbit_u8(tcg_res, tcg_op);
} else {
gen_helper_neon_cnt_u8(tcg_res, tcg_op);
}
break;
case 0x7: /* SQABS, SQNEG */
{
NeonGenOneOpEnvFn *genfn;
static NeonGenOneOpEnvFn * const fns[2][2] = {
{ gen_helper_neon_qabs_s8, gen_helper_neon_qneg_s8 },
{ gen_helper_neon_qabs_s16, gen_helper_neon_qneg_s16 },
};
genfn = fns[size][u];
genfn(tcg_res, tcg_env, tcg_op);
break;
}
case 0x4: /* CLS, CLZ */
if (u) {
if (size == 0) {
gen_helper_neon_clz_u8(tcg_res, tcg_op);
} else {
gen_helper_neon_clz_u16(tcg_res, tcg_op);
}
} else {
if (size == 0) {
gen_helper_neon_cls_s8(tcg_res, tcg_op);
} else {
gen_helper_neon_cls_s16(tcg_res, tcg_op);
}
}
break;
default:
g_assert_not_reached();
}
}
write_vec_element_i32(s, tcg_res, rd, pass, MO_32);
}
}
clear_vec_high(s, is_q, rd);
if (tcg_rmode) {
gen_restore_rmode(tcg_rmode, tcg_fpstatus);
}
}
/* AdvSIMD [scalar] two register miscellaneous (FP16)
*
* 31 30 29 28 27 24 23 22 21 17 16 12 11 10 9 5 4 0
* +---+---+---+---+---------+---+-------------+--------+-----+------+------+
* | 0 | Q | U | S | 1 1 1 0 | a | 1 1 1 1 0 0 | opcode | 1 0 | Rn | Rd |
* +---+---+---+---+---------+---+-------------+--------+-----+------+------+
* mask: 1000 1111 0111 1110 0000 1100 0000 0000 0x8f7e 0c00
* val: 0000 1110 0111 1000 0000 1000 0000 0000 0x0e78 0800
*
* This actually covers two groups where scalar access is governed by
* bit 28. A bunch of the instructions (float to integral) only exist
* in the vector form and are un-allocated for the scalar decode. Also
* in the scalar decode Q is always 1.
*/
static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
{
int fpop, opcode, a, u;
int rn, rd;
bool is_q;
bool is_scalar;
bool only_in_vector = false;
int pass;
TCGv_i32 tcg_rmode = NULL;
TCGv_ptr tcg_fpstatus = NULL;
bool need_fpst = true;
int rmode = -1;
if (!dc_isar_feature(aa64_fp16, s)) {
unallocated_encoding(s);
return;
}
rd = extract32(insn, 0, 5);
rn = extract32(insn, 5, 5);
a = extract32(insn, 23, 1);
u = extract32(insn, 29, 1);
is_scalar = extract32(insn, 28, 1);
is_q = extract32(insn, 30, 1);
opcode = extract32(insn, 12, 5);
fpop = deposit32(opcode, 5, 1, a);
fpop = deposit32(fpop, 6, 1, u);
switch (fpop) {
case 0x1d: /* SCVTF */
case 0x5d: /* UCVTF */
{
int elements;
if (is_scalar) {
elements = 1;
} else {
elements = (is_q ? 8 : 4);
}
if (!fp_access_check(s)) {
return;
}
handle_simd_intfp_conv(s, rd, rn, elements, !u, 0, MO_16);
return;
}
break;
case 0x2c: /* FCMGT (zero) */
case 0x2d: /* FCMEQ (zero) */
case 0x2e: /* FCMLT (zero) */
case 0x6c: /* FCMGE (zero) */
case 0x6d: /* FCMLE (zero) */
handle_2misc_fcmp_zero(s, fpop, is_scalar, 0, is_q, MO_16, rn, rd);
return;
case 0x3d: /* FRECPE */
case 0x3f: /* FRECPX */
break;
case 0x18: /* FRINTN */
only_in_vector = true;
rmode = FPROUNDING_TIEEVEN;
break;
case 0x19: /* FRINTM */
only_in_vector = true;
rmode = FPROUNDING_NEGINF;
break;
case 0x38: /* FRINTP */
only_in_vector = true;
rmode = FPROUNDING_POSINF;
break;
case 0x39: /* FRINTZ */
only_in_vector = true;
rmode = FPROUNDING_ZERO;
break;
case 0x58: /* FRINTA */
only_in_vector = true;
rmode = FPROUNDING_TIEAWAY;
break;
case 0x59: /* FRINTX */
case 0x79: /* FRINTI */
only_in_vector = true;
/* current rounding mode */
break;
case 0x1a: /* FCVTNS */
rmode = FPROUNDING_TIEEVEN;
break;
case 0x1b: /* FCVTMS */
rmode = FPROUNDING_NEGINF;
break;
case 0x1c: /* FCVTAS */
rmode = FPROUNDING_TIEAWAY;
break;
case 0x3a: /* FCVTPS */
rmode = FPROUNDING_POSINF;
break;
case 0x3b: /* FCVTZS */
rmode = FPROUNDING_ZERO;
break;
case 0x5a: /* FCVTNU */
rmode = FPROUNDING_TIEEVEN;
break;
case 0x5b: /* FCVTMU */
rmode = FPROUNDING_NEGINF;
break;
case 0x5c: /* FCVTAU */
rmode = FPROUNDING_TIEAWAY;
break;
case 0x7a: /* FCVTPU */
rmode = FPROUNDING_POSINF;
break;
case 0x7b: /* FCVTZU */
rmode = FPROUNDING_ZERO;
break;
case 0x2f: /* FABS */
case 0x6f: /* FNEG */
need_fpst = false;
break;
case 0x7d: /* FRSQRTE */
case 0x7f: /* FSQRT (vector) */
break;
default:
unallocated_encoding(s);
return;
}
/* Check additional constraints for the scalar encoding */
if (is_scalar) {
if (!is_q) {
unallocated_encoding(s);
return;
}
/* FRINTxx is only in the vector form */
if (only_in_vector) {
unallocated_encoding(s);
return;
}
}
if (!fp_access_check(s)) {
return;
}
if (rmode >= 0 || need_fpst) {
tcg_fpstatus = fpstatus_ptr(FPST_FPCR_F16);
}
if (rmode >= 0) {
tcg_rmode = gen_set_rmode(rmode, tcg_fpstatus);
}
if (is_scalar) {
TCGv_i32 tcg_op = read_fp_hreg(s, rn);
TCGv_i32 tcg_res = tcg_temp_new_i32();
switch (fpop) {
case 0x1a: /* FCVTNS */
case 0x1b: /* FCVTMS */
case 0x1c: /* FCVTAS */
case 0x3a: /* FCVTPS */
case 0x3b: /* FCVTZS */
gen_helper_advsimd_f16tosinth(tcg_res, tcg_op, tcg_fpstatus);
break;
case 0x3d: /* FRECPE */
gen_helper_recpe_f16(tcg_res, tcg_op, tcg_fpstatus);
break;
case 0x3f: /* FRECPX */
gen_helper_frecpx_f16(tcg_res, tcg_op, tcg_fpstatus);
break;
case 0x5a: /* FCVTNU */
case 0x5b: /* FCVTMU */
case 0x5c: /* FCVTAU */
case 0x7a: /* FCVTPU */
case 0x7b: /* FCVTZU */
gen_helper_advsimd_f16touinth(tcg_res, tcg_op, tcg_fpstatus);
break;
case 0x6f: /* FNEG */
tcg_gen_xori_i32(tcg_res, tcg_op, 0x8000);
break;
case 0x7d: /* FRSQRTE */
gen_helper_rsqrte_f16(tcg_res, tcg_op, tcg_fpstatus);
break;
default:
g_assert_not_reached();
}
/* limit any sign extension going on */
tcg_gen_andi_i32(tcg_res, tcg_res, 0xffff);
write_fp_sreg(s, rd, tcg_res);
} else {
for (pass = 0; pass < (is_q ? 8 : 4); pass++) {
TCGv_i32 tcg_op = tcg_temp_new_i32();
TCGv_i32 tcg_res = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_op, rn, pass, MO_16);
switch (fpop) {
case 0x1a: /* FCVTNS */
case 0x1b: /* FCVTMS */
case 0x1c: /* FCVTAS */
case 0x3a: /* FCVTPS */
case 0x3b: /* FCVTZS */
gen_helper_advsimd_f16tosinth(tcg_res, tcg_op, tcg_fpstatus);
break;
case 0x3d: /* FRECPE */
gen_helper_recpe_f16(tcg_res, tcg_op, tcg_fpstatus);
break;
case 0x5a: /* FCVTNU */
case 0x5b: /* FCVTMU */
case 0x5c: /* FCVTAU */
case 0x7a: /* FCVTPU */
case 0x7b: /* FCVTZU */
gen_helper_advsimd_f16touinth(tcg_res, tcg_op, tcg_fpstatus);
break;
case 0x18: /* FRINTN */
case 0x19: /* FRINTM */
case 0x38: /* FRINTP */
case 0x39: /* FRINTZ */
case 0x58: /* FRINTA */
case 0x79: /* FRINTI */
gen_helper_advsimd_rinth(tcg_res, tcg_op, tcg_fpstatus);
break;
case 0x59: /* FRINTX */
gen_helper_advsimd_rinth_exact(tcg_res, tcg_op, tcg_fpstatus);
break;
case 0x2f: /* FABS */
tcg_gen_andi_i32(tcg_res, tcg_op, 0x7fff);
break;
case 0x6f: /* FNEG */
tcg_gen_xori_i32(tcg_res, tcg_op, 0x8000);
break;
case 0x7d: /* FRSQRTE */
gen_helper_rsqrte_f16(tcg_res, tcg_op, tcg_fpstatus);
break;
case 0x7f: /* FSQRT */
gen_helper_sqrt_f16(tcg_res, tcg_op, tcg_fpstatus);
break;
default:
g_assert_not_reached();
}
write_vec_element_i32(s, tcg_res, rd, pass, MO_16);
}
clear_vec_high(s, is_q, rd);
}
if (tcg_rmode) {
gen_restore_rmode(tcg_rmode, tcg_fpstatus);
}
}
/* AdvSIMD scalar x indexed element
* 31 30 29 28 24 23 22 21 20 19 16 15 12 11 10 9 5 4 0
* +-----+---+-----------+------+---+---+------+-----+---+---+------+------+
* | 0 1 | U | 1 1 1 1 1 | size | L | M | Rm | opc | H | 0 | Rn | Rd |
* +-----+---+-----------+------+---+---+------+-----+---+---+------+------+
* AdvSIMD vector x indexed element
* 31 30 29 28 24 23 22 21 20 19 16 15 12 11 10 9 5 4 0
* +---+---+---+-----------+------+---+---+------+-----+---+---+------+------+
* | 0 | Q | U | 0 1 1 1 1 | size | L | M | Rm | opc | H | 0 | Rn | Rd |
* +---+---+---+-----------+------+---+---+------+-----+---+---+------+------+
*/
static void disas_simd_indexed(DisasContext *s, uint32_t insn)
{
/* This encoding has two kinds of instruction:
* normal, where we perform elt x idxelt => elt for each
* element in the vector
* long, where we perform elt x idxelt and generate a result of
* double the width of the input element
* The long ops have a 'part' specifier (ie come in INSN, INSN2 pairs).
*/
bool is_scalar = extract32(insn, 28, 1);
bool is_q = extract32(insn, 30, 1);
bool u = extract32(insn, 29, 1);
int size = extract32(insn, 22, 2);
int l = extract32(insn, 21, 1);
int m = extract32(insn, 20, 1);
/* Note that the Rm field here is only 4 bits, not 5 as it usually is */
int rm = extract32(insn, 16, 4);
int opcode = extract32(insn, 12, 4);
int h = extract32(insn, 11, 1);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
bool is_long = false;
int is_fp = 0;
bool is_fp16 = false;
int index;
TCGv_ptr fpst;
switch (16 * u + opcode) {
case 0x08: /* MUL */
case 0x10: /* MLA */
case 0x14: /* MLS */
if (is_scalar) {
unallocated_encoding(s);
return;
}
break;
case 0x02: /* SMLAL, SMLAL2 */
case 0x12: /* UMLAL, UMLAL2 */
case 0x06: /* SMLSL, SMLSL2 */
case 0x16: /* UMLSL, UMLSL2 */
case 0x0a: /* SMULL, SMULL2 */
case 0x1a: /* UMULL, UMULL2 */
if (is_scalar) {
unallocated_encoding(s);
return;
}
is_long = true;
break;
case 0x03: /* SQDMLAL, SQDMLAL2 */
case 0x07: /* SQDMLSL, SQDMLSL2 */
case 0x0b: /* SQDMULL, SQDMULL2 */
is_long = true;
break;
case 0x0c: /* SQDMULH */
case 0x0d: /* SQRDMULH */
break;
case 0x01: /* FMLA */
case 0x05: /* FMLS */
case 0x09: /* FMUL */
case 0x19: /* FMULX */
is_fp = 1;
break;
case 0x1d: /* SQRDMLAH */
case 0x1f: /* SQRDMLSH */
if (!dc_isar_feature(aa64_rdm, s)) {
unallocated_encoding(s);
return;
}
break;
case 0x0e: /* SDOT */
case 0x1e: /* UDOT */
if (is_scalar || size != MO_32 || !dc_isar_feature(aa64_dp, s)) {
unallocated_encoding(s);
return;
}
break;
case 0x0f:
switch (size) {
case 0: /* SUDOT */
case 2: /* USDOT */
if (is_scalar || !dc_isar_feature(aa64_i8mm, s)) {
unallocated_encoding(s);
return;
}
size = MO_32;
break;
case 1: /* BFDOT */
if (is_scalar || !dc_isar_feature(aa64_bf16, s)) {
unallocated_encoding(s);
return;
}
size = MO_32;
break;
case 3: /* BFMLAL{B,T} */
if (is_scalar || !dc_isar_feature(aa64_bf16, s)) {
unallocated_encoding(s);
return;
}
/* can't set is_fp without other incorrect size checks */
size = MO_16;
break;
default:
unallocated_encoding(s);
return;
}
break;
case 0x11: /* FCMLA #0 */
case 0x13: /* FCMLA #90 */
case 0x15: /* FCMLA #180 */
case 0x17: /* FCMLA #270 */
if (is_scalar || !dc_isar_feature(aa64_fcma, s)) {
unallocated_encoding(s);
return;
}
is_fp = 2;
break;
case 0x00: /* FMLAL */
case 0x04: /* FMLSL */
case 0x18: /* FMLAL2 */
case 0x1c: /* FMLSL2 */
if (is_scalar || size != MO_32 || !dc_isar_feature(aa64_fhm, s)) {
unallocated_encoding(s);
return;
}
size = MO_16;
/* is_fp, but we pass tcg_env not fp_status. */
break;
default:
unallocated_encoding(s);
return;
}
switch (is_fp) {
case 1: /* normal fp */
/* convert insn encoded size to MemOp size */
switch (size) {
case 0: /* half-precision */
size = MO_16;
is_fp16 = true;
break;
case MO_32: /* single precision */
case MO_64: /* double precision */
break;
default:
unallocated_encoding(s);
return;
}
break;
case 2: /* complex fp */
/* Each indexable element is a complex pair. */
size += 1;
switch (size) {
case MO_32:
if (h && !is_q) {
unallocated_encoding(s);
return;
}
is_fp16 = true;
break;
case MO_64:
break;
default:
unallocated_encoding(s);
return;
}
break;
default: /* integer */
switch (size) {
case MO_8:
case MO_64:
unallocated_encoding(s);
return;
}
break;
}
if (is_fp16 && !dc_isar_feature(aa64_fp16, s)) {
unallocated_encoding(s);
return;
}
/* Given MemOp size, adjust register and indexing. */
switch (size) {
case MO_16:
index = h << 2 | l << 1 | m;
break;
case MO_32:
index = h << 1 | l;
rm |= m << 4;
break;
case MO_64:
if (l || !is_q) {
unallocated_encoding(s);
return;
}
index = h;
rm |= m << 4;
break;
default:
g_assert_not_reached();
}
if (!fp_access_check(s)) {
return;
}
if (is_fp) {
fpst = fpstatus_ptr(is_fp16 ? FPST_FPCR_F16 : FPST_FPCR);
} else {
fpst = NULL;
}
switch (16 * u + opcode) {
case 0x0e: /* SDOT */
case 0x1e: /* UDOT */
gen_gvec_op4_ool(s, is_q, rd, rn, rm, rd, index,
u ? gen_helper_gvec_udot_idx_b
: gen_helper_gvec_sdot_idx_b);
return;
case 0x0f:
switch (extract32(insn, 22, 2)) {
case 0: /* SUDOT */
gen_gvec_op4_ool(s, is_q, rd, rn, rm, rd, index,
gen_helper_gvec_sudot_idx_b);
return;
case 1: /* BFDOT */
gen_gvec_op4_ool(s, is_q, rd, rn, rm, rd, index,
gen_helper_gvec_bfdot_idx);
return;
case 2: /* USDOT */
gen_gvec_op4_ool(s, is_q, rd, rn, rm, rd, index,
gen_helper_gvec_usdot_idx_b);
return;
case 3: /* BFMLAL{B,T} */
gen_gvec_op4_fpst(s, 1, rd, rn, rm, rd, 0, (index << 1) | is_q,
gen_helper_gvec_bfmlal_idx);
return;
}
g_assert_not_reached();
case 0x11: /* FCMLA #0 */
case 0x13: /* FCMLA #90 */
case 0x15: /* FCMLA #180 */
case 0x17: /* FCMLA #270 */
{
int rot = extract32(insn, 13, 2);
int data = (index << 2) | rot;
tcg_gen_gvec_4_ptr(vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm),
vec_full_reg_offset(s, rd), fpst,
is_q ? 16 : 8, vec_full_reg_size(s), data,
size == MO_64
? gen_helper_gvec_fcmlas_idx
: gen_helper_gvec_fcmlah_idx);
}
return;
case 0x00: /* FMLAL */
case 0x04: /* FMLSL */
case 0x18: /* FMLAL2 */
case 0x1c: /* FMLSL2 */
{
int is_s = extract32(opcode, 2, 1);
int is_2 = u;
int data = (index << 2) | (is_2 << 1) | is_s;
tcg_gen_gvec_3_ptr(vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm), tcg_env,
is_q ? 16 : 8, vec_full_reg_size(s),
data, gen_helper_gvec_fmlal_idx_a64);
}
return;
case 0x08: /* MUL */
if (!is_long && !is_scalar) {
static gen_helper_gvec_3 * const fns[3] = {
gen_helper_gvec_mul_idx_h,
gen_helper_gvec_mul_idx_s,
gen_helper_gvec_mul_idx_d,
};
tcg_gen_gvec_3_ool(vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm),
is_q ? 16 : 8, vec_full_reg_size(s),
index, fns[size - 1]);
return;
}
break;
case 0x10: /* MLA */
if (!is_long && !is_scalar) {
static gen_helper_gvec_4 * const fns[3] = {
gen_helper_gvec_mla_idx_h,
gen_helper_gvec_mla_idx_s,
gen_helper_gvec_mla_idx_d,
};
tcg_gen_gvec_4_ool(vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm),
vec_full_reg_offset(s, rd),
is_q ? 16 : 8, vec_full_reg_size(s),
index, fns[size - 1]);
return;
}
break;
case 0x14: /* MLS */
if (!is_long && !is_scalar) {
static gen_helper_gvec_4 * const fns[3] = {
gen_helper_gvec_mls_idx_h,
gen_helper_gvec_mls_idx_s,
gen_helper_gvec_mls_idx_d,
};
tcg_gen_gvec_4_ool(vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm),
vec_full_reg_offset(s, rd),
is_q ? 16 : 8, vec_full_reg_size(s),
index, fns[size - 1]);
return;
}
break;
}
if (size == 3) {
TCGv_i64 tcg_idx = tcg_temp_new_i64();
int pass;
assert(is_fp && is_q && !is_long);
read_vec_element(s, tcg_idx, rm, index, MO_64);
for (pass = 0; pass < (is_scalar ? 1 : 2); pass++) {
TCGv_i64 tcg_op = tcg_temp_new_i64();
TCGv_i64 tcg_res = tcg_temp_new_i64();
read_vec_element(s, tcg_op, rn, pass, MO_64);
switch (16 * u + opcode) {
case 0x05: /* FMLS */
/* As usual for ARM, separate negation for fused multiply-add */
gen_helper_vfp_negd(tcg_op, tcg_op);
/* fall through */
case 0x01: /* FMLA */
read_vec_element(s, tcg_res, rd, pass, MO_64);
gen_helper_vfp_muladdd(tcg_res, tcg_op, tcg_idx, tcg_res, fpst);
break;
case 0x09: /* FMUL */
gen_helper_vfp_muld(tcg_res, tcg_op, tcg_idx, fpst);
break;
case 0x19: /* FMULX */
gen_helper_vfp_mulxd(tcg_res, tcg_op, tcg_idx, fpst);
break;
default:
g_assert_not_reached();
}
write_vec_element(s, tcg_res, rd, pass, MO_64);
}
clear_vec_high(s, !is_scalar, rd);
} else if (!is_long) {
/* 32 bit floating point, or 16 or 32 bit integer.
* For the 16 bit scalar case we use the usual Neon helpers and
* rely on the fact that 0 op 0 == 0 with no side effects.
*/
TCGv_i32 tcg_idx = tcg_temp_new_i32();
int pass, maxpasses;
if (is_scalar) {
maxpasses = 1;
} else {
maxpasses = is_q ? 4 : 2;
}
read_vec_element_i32(s, tcg_idx, rm, index, size);
if (size == 1 && !is_scalar) {
/* The simplest way to handle the 16x16 indexed ops is to duplicate
* the index into both halves of the 32 bit tcg_idx and then use
* the usual Neon helpers.
*/
tcg_gen_deposit_i32(tcg_idx, tcg_idx, tcg_idx, 16, 16);
}
for (pass = 0; pass < maxpasses; pass++) {
TCGv_i32 tcg_op = tcg_temp_new_i32();
TCGv_i32 tcg_res = tcg_temp_new_i32();
read_vec_element_i32(s, tcg_op, rn, pass, is_scalar ? size : MO_32);
switch (16 * u + opcode) {
case 0x08: /* MUL */
case 0x10: /* MLA */
case 0x14: /* MLS */
{
static NeonGenTwoOpFn * const fns[2][2] = {
{ gen_helper_neon_add_u16, gen_helper_neon_sub_u16 },
{ tcg_gen_add_i32, tcg_gen_sub_i32 },
};
NeonGenTwoOpFn *genfn;
bool is_sub = opcode == 0x4;
if (size == 1) {
gen_helper_neon_mul_u16(tcg_res, tcg_op, tcg_idx);
} else {
tcg_gen_mul_i32(tcg_res, tcg_op, tcg_idx);
}
if (opcode == 0x8) {
break;
}
read_vec_element_i32(s, tcg_op, rd, pass, MO_32);
genfn = fns[size - 1][is_sub];
genfn(tcg_res, tcg_op, tcg_res);
break;
}
case 0x05: /* FMLS */
case 0x01: /* FMLA */
read_vec_element_i32(s, tcg_res, rd, pass,
is_scalar ? size : MO_32);
switch (size) {
case 1:
if (opcode == 0x5) {
/* As usual for ARM, separate negation for fused
* multiply-add */
tcg_gen_xori_i32(tcg_op, tcg_op, 0x80008000);
}
if (is_scalar) {
gen_helper_advsimd_muladdh(tcg_res, tcg_op, tcg_idx,
tcg_res, fpst);
} else {
gen_helper_advsimd_muladd2h(tcg_res, tcg_op, tcg_idx,
tcg_res, fpst);
}
break;
case 2:
if (opcode == 0x5) {
/* As usual for ARM, separate negation for
* fused multiply-add */
tcg_gen_xori_i32(tcg_op, tcg_op, 0x80000000);
}
gen_helper_vfp_muladds(tcg_res, tcg_op, tcg_idx,
tcg_res, fpst);
break;
default:
g_assert_not_reached();
}
break;
case 0x09: /* FMUL */
switch (size) {
case 1:
if (is_scalar) {
gen_helper_advsimd_mulh(tcg_res, tcg_op,
tcg_idx, fpst);
} else {
gen_helper_advsimd_mul2h(tcg_res, tcg_op,
tcg_idx, fpst);
}
break;
case 2:
gen_helper_vfp_muls(tcg_res, tcg_op, tcg_idx, fpst);
break;
default:
g_assert_not_reached();
}
break;
case 0x19: /* FMULX */
switch (size) {
case 1:
if (is_scalar) {
gen_helper_advsimd_mulxh(tcg_res, tcg_op,
tcg_idx, fpst);
} else {
gen_helper_advsimd_mulx2h(tcg_res, tcg_op,
tcg_idx, fpst);
}
break;
case 2:
gen_helper_vfp_mulxs(tcg_res, tcg_op, tcg_idx, fpst);
break;
default:
g_assert_not_reached();
}
break;
case 0x0c: /* SQDMULH */
if (size == 1) {
gen_helper_neon_qdmulh_s16(tcg_res, tcg_env,
tcg_op, tcg_idx);
} else {
gen_helper_neon_qdmulh_s32(tcg_res, tcg_env,
tcg_op, tcg_idx);
}
break;
case 0x0d: /* SQRDMULH */
if (size == 1) {
gen_helper_neon_qrdmulh_s16(tcg_res, tcg_env,
tcg_op, tcg_idx);
} else {
gen_helper_neon_qrdmulh_s32(tcg_res, tcg_env,
tcg_op, tcg_idx);
}
break;
case 0x1d: /* SQRDMLAH */
read_vec_element_i32(s, tcg_res, rd, pass,
is_scalar ? size : MO_32);
if (size == 1) {
gen_helper_neon_qrdmlah_s16(tcg_res, tcg_env,
tcg_op, tcg_idx, tcg_res);
} else {
gen_helper_neon_qrdmlah_s32(tcg_res, tcg_env,
tcg_op, tcg_idx, tcg_res);
}
break;
case 0x1f: /* SQRDMLSH */
read_vec_element_i32(s, tcg_res, rd, pass,
is_scalar ? size : MO_32);
if (size == 1) {
gen_helper_neon_qrdmlsh_s16(tcg_res, tcg_env,
tcg_op, tcg_idx, tcg_res);
} else {
gen_helper_neon_qrdmlsh_s32(tcg_res, tcg_env,
tcg_op, tcg_idx, tcg_res);
}
break;
default:
g_assert_not_reached();
}
if (is_scalar) {
write_fp_sreg(s, rd, tcg_res);
} else {
write_vec_element_i32(s, tcg_res, rd, pass, MO_32);
}
}
clear_vec_high(s, is_q, rd);
} else {
/* long ops: 16x16->32 or 32x32->64 */
TCGv_i64 tcg_res[2];
int pass;
bool satop = extract32(opcode, 0, 1);
MemOp memop = MO_32;
if (satop || !u) {
memop |= MO_SIGN;
}
if (size == 2) {
TCGv_i64 tcg_idx = tcg_temp_new_i64();
read_vec_element(s, tcg_idx, rm, index, memop);
for (pass = 0; pass < (is_scalar ? 1 : 2); pass++) {
TCGv_i64 tcg_op = tcg_temp_new_i64();
TCGv_i64 tcg_passres;
int passelt;
if (is_scalar) {
passelt = 0;
} else {
passelt = pass + (is_q * 2);
}
read_vec_element(s, tcg_op, rn, passelt, memop);
tcg_res[pass] = tcg_temp_new_i64();
if (opcode == 0xa || opcode == 0xb) {
/* Non-accumulating ops */
tcg_passres = tcg_res[pass];
} else {
tcg_passres = tcg_temp_new_i64();
}
tcg_gen_mul_i64(tcg_passres, tcg_op, tcg_idx);
if (satop) {
/* saturating, doubling */
gen_helper_neon_addl_saturate_s64(tcg_passres, tcg_env,
tcg_passres, tcg_passres);
}
if (opcode == 0xa || opcode == 0xb) {
continue;
}
/* Accumulating op: handle accumulate step */
read_vec_element(s, tcg_res[pass], rd, pass, MO_64);
switch (opcode) {
case 0x2: /* SMLAL, SMLAL2, UMLAL, UMLAL2 */
tcg_gen_add_i64(tcg_res[pass], tcg_res[pass], tcg_passres);
break;
case 0x6: /* SMLSL, SMLSL2, UMLSL, UMLSL2 */
tcg_gen_sub_i64(tcg_res[pass], tcg_res[pass], tcg_passres);
break;
case 0x7: /* SQDMLSL, SQDMLSL2 */
tcg_gen_neg_i64(tcg_passres, tcg_passres);
/* fall through */
case 0x3: /* SQDMLAL, SQDMLAL2 */
gen_helper_neon_addl_saturate_s64(tcg_res[pass], tcg_env,
tcg_res[pass],
tcg_passres);
break;
default:
g_assert_not_reached();
}
}
clear_vec_high(s, !is_scalar, rd);
} else {
TCGv_i32 tcg_idx = tcg_temp_new_i32();
assert(size == 1);
read_vec_element_i32(s, tcg_idx, rm, index, size);
if (!is_scalar) {
/* The simplest way to handle the 16x16 indexed ops is to
* duplicate the index into both halves of the 32 bit tcg_idx
* and then use the usual Neon helpers.
*/
tcg_gen_deposit_i32(tcg_idx, tcg_idx, tcg_idx, 16, 16);
}
for (pass = 0; pass < (is_scalar ? 1 : 2); pass++) {
TCGv_i32 tcg_op = tcg_temp_new_i32();
TCGv_i64 tcg_passres;
if (is_scalar) {
read_vec_element_i32(s, tcg_op, rn, pass, size);
} else {
read_vec_element_i32(s, tcg_op, rn,
pass + (is_q * 2), MO_32);
}
tcg_res[pass] = tcg_temp_new_i64();
if (opcode == 0xa || opcode == 0xb) {
/* Non-accumulating ops */
tcg_passres = tcg_res[pass];
} else {
tcg_passres = tcg_temp_new_i64();
}
if (memop & MO_SIGN) {
gen_helper_neon_mull_s16(tcg_passres, tcg_op, tcg_idx);
} else {
gen_helper_neon_mull_u16(tcg_passres, tcg_op, tcg_idx);
}
if (satop) {
gen_helper_neon_addl_saturate_s32(tcg_passres, tcg_env,
tcg_passres, tcg_passres);
}
if (opcode == 0xa || opcode == 0xb) {
continue;
}
/* Accumulating op: handle accumulate step */
read_vec_element(s, tcg_res[pass], rd, pass, MO_64);
switch (opcode) {
case 0x2: /* SMLAL, SMLAL2, UMLAL, UMLAL2 */
gen_helper_neon_addl_u32(tcg_res[pass], tcg_res[pass],
tcg_passres);
break;
case 0x6: /* SMLSL, SMLSL2, UMLSL, UMLSL2 */
gen_helper_neon_subl_u32(tcg_res[pass], tcg_res[pass],
tcg_passres);
break;
case 0x7: /* SQDMLSL, SQDMLSL2 */
gen_helper_neon_negl_u32(tcg_passres, tcg_passres);
/* fall through */
case 0x3: /* SQDMLAL, SQDMLAL2 */
gen_helper_neon_addl_saturate_s32(tcg_res[pass], tcg_env,
tcg_res[pass],
tcg_passres);
break;
default:
g_assert_not_reached();
}
}
if (is_scalar) {
tcg_gen_ext32u_i64(tcg_res[0], tcg_res[0]);
}
}
if (is_scalar) {
tcg_res[1] = tcg_constant_i64(0);
}
for (pass = 0; pass < 2; pass++) {
write_vec_element(s, tcg_res[pass], rd, pass, MO_64);
}
}
}
/* Crypto AES
* 31 24 23 22 21 17 16 12 11 10 9 5 4 0
* +-----------------+------+-----------+--------+-----+------+------+
* | 0 1 0 0 1 1 1 0 | size | 1 0 1 0 0 | opcode | 1 0 | Rn | Rd |
* +-----------------+------+-----------+--------+-----+------+------+
*/
static void disas_crypto_aes(DisasContext *s, uint32_t insn)
{
int size = extract32(insn, 22, 2);
int opcode = extract32(insn, 12, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
gen_helper_gvec_2 *genfn2 = NULL;
gen_helper_gvec_3 *genfn3 = NULL;
if (!dc_isar_feature(aa64_aes, s) || size != 0) {
unallocated_encoding(s);
return;
}
switch (opcode) {
case 0x4: /* AESE */
genfn3 = gen_helper_crypto_aese;
break;
case 0x6: /* AESMC */
genfn2 = gen_helper_crypto_aesmc;
break;
case 0x5: /* AESD */
genfn3 = gen_helper_crypto_aesd;
break;
case 0x7: /* AESIMC */
genfn2 = gen_helper_crypto_aesimc;
break;
default:
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
if (genfn2) {
gen_gvec_op2_ool(s, true, rd, rn, 0, genfn2);
} else {
gen_gvec_op3_ool(s, true, rd, rd, rn, 0, genfn3);
}
}
/* Crypto three-reg SHA
* 31 24 23 22 21 20 16 15 14 12 11 10 9 5 4 0
* +-----------------+------+---+------+---+--------+-----+------+------+
* | 0 1 0 1 1 1 1 0 | size | 0 | Rm | 0 | opcode | 0 0 | Rn | Rd |
* +-----------------+------+---+------+---+--------+-----+------+------+
*/
static void disas_crypto_three_reg_sha(DisasContext *s, uint32_t insn)
{
int size = extract32(insn, 22, 2);
int opcode = extract32(insn, 12, 3);
int rm = extract32(insn, 16, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
gen_helper_gvec_3 *genfn;
bool feature;
if (size != 0) {
unallocated_encoding(s);
return;
}
switch (opcode) {
case 0: /* SHA1C */
genfn = gen_helper_crypto_sha1c;
feature = dc_isar_feature(aa64_sha1, s);
break;
case 1: /* SHA1P */
genfn = gen_helper_crypto_sha1p;
feature = dc_isar_feature(aa64_sha1, s);
break;
case 2: /* SHA1M */
genfn = gen_helper_crypto_sha1m;
feature = dc_isar_feature(aa64_sha1, s);
break;
case 3: /* SHA1SU0 */
genfn = gen_helper_crypto_sha1su0;
feature = dc_isar_feature(aa64_sha1, s);
break;
case 4: /* SHA256H */
genfn = gen_helper_crypto_sha256h;
feature = dc_isar_feature(aa64_sha256, s);
break;
case 5: /* SHA256H2 */
genfn = gen_helper_crypto_sha256h2;
feature = dc_isar_feature(aa64_sha256, s);
break;
case 6: /* SHA256SU1 */
genfn = gen_helper_crypto_sha256su1;
feature = dc_isar_feature(aa64_sha256, s);
break;
default:
unallocated_encoding(s);
return;
}
if (!feature) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
gen_gvec_op3_ool(s, true, rd, rn, rm, 0, genfn);
}
/* Crypto two-reg SHA
* 31 24 23 22 21 17 16 12 11 10 9 5 4 0
* +-----------------+------+-----------+--------+-----+------+------+
* | 0 1 0 1 1 1 1 0 | size | 1 0 1 0 0 | opcode | 1 0 | Rn | Rd |
* +-----------------+------+-----------+--------+-----+------+------+
*/
static void disas_crypto_two_reg_sha(DisasContext *s, uint32_t insn)
{
int size = extract32(insn, 22, 2);
int opcode = extract32(insn, 12, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
gen_helper_gvec_2 *genfn;
bool feature;
if (size != 0) {
unallocated_encoding(s);
return;
}
switch (opcode) {
case 0: /* SHA1H */
feature = dc_isar_feature(aa64_sha1, s);
genfn = gen_helper_crypto_sha1h;
break;
case 1: /* SHA1SU1 */
feature = dc_isar_feature(aa64_sha1, s);
genfn = gen_helper_crypto_sha1su1;
break;
case 2: /* SHA256SU0 */
feature = dc_isar_feature(aa64_sha256, s);
genfn = gen_helper_crypto_sha256su0;
break;
default:
unallocated_encoding(s);
return;
}
if (!feature) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
gen_gvec_op2_ool(s, true, rd, rn, 0, genfn);
}
static void gen_rax1_i64(TCGv_i64 d, TCGv_i64 n, TCGv_i64 m)
{
tcg_gen_rotli_i64(d, m, 1);
tcg_gen_xor_i64(d, d, n);
}
static void gen_rax1_vec(unsigned vece, TCGv_vec d, TCGv_vec n, TCGv_vec m)
{
tcg_gen_rotli_vec(vece, d, m, 1);
tcg_gen_xor_vec(vece, d, d, n);
}
void gen_gvec_rax1(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz)
{
static const TCGOpcode vecop_list[] = { INDEX_op_rotli_vec, 0 };
static const GVecGen3 op = {
.fni8 = gen_rax1_i64,
.fniv = gen_rax1_vec,
.opt_opc = vecop_list,
.fno = gen_helper_crypto_rax1,
.vece = MO_64,
};
tcg_gen_gvec_3(rd_ofs, rn_ofs, rm_ofs, opr_sz, max_sz, &op);
}
/* Crypto three-reg SHA512
* 31 21 20 16 15 14 13 12 11 10 9 5 4 0
* +-----------------------+------+---+---+-----+--------+------+------+
* | 1 1 0 0 1 1 1 0 0 1 1 | Rm | 1 | O | 0 0 | opcode | Rn | Rd |
* +-----------------------+------+---+---+-----+--------+------+------+
*/
static void disas_crypto_three_reg_sha512(DisasContext *s, uint32_t insn)
{
int opcode = extract32(insn, 10, 2);
int o = extract32(insn, 14, 1);
int rm = extract32(insn, 16, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
bool feature;
gen_helper_gvec_3 *oolfn = NULL;
GVecGen3Fn *gvecfn = NULL;
if (o == 0) {
switch (opcode) {
case 0: /* SHA512H */
feature = dc_isar_feature(aa64_sha512, s);
oolfn = gen_helper_crypto_sha512h;
break;
case 1: /* SHA512H2 */
feature = dc_isar_feature(aa64_sha512, s);
oolfn = gen_helper_crypto_sha512h2;
break;
case 2: /* SHA512SU1 */
feature = dc_isar_feature(aa64_sha512, s);
oolfn = gen_helper_crypto_sha512su1;
break;
case 3: /* RAX1 */
feature = dc_isar_feature(aa64_sha3, s);
gvecfn = gen_gvec_rax1;
break;
default:
g_assert_not_reached();
}
} else {
switch (opcode) {
case 0: /* SM3PARTW1 */
feature = dc_isar_feature(aa64_sm3, s);
oolfn = gen_helper_crypto_sm3partw1;
break;
case 1: /* SM3PARTW2 */
feature = dc_isar_feature(aa64_sm3, s);
oolfn = gen_helper_crypto_sm3partw2;
break;
case 2: /* SM4EKEY */
feature = dc_isar_feature(aa64_sm4, s);
oolfn = gen_helper_crypto_sm4ekey;
break;
default:
unallocated_encoding(s);
return;
}
}
if (!feature) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
if (oolfn) {
gen_gvec_op3_ool(s, true, rd, rn, rm, 0, oolfn);
} else {
gen_gvec_fn3(s, true, rd, rn, rm, gvecfn, MO_64);
}
}
/* Crypto two-reg SHA512
* 31 12 11 10 9 5 4 0
* +-----------------------------------------+--------+------+------+
* | 1 1 0 0 1 1 1 0 1 1 0 0 0 0 0 0 1 0 0 0 | opcode | Rn | Rd |
* +-----------------------------------------+--------+------+------+
*/
static void disas_crypto_two_reg_sha512(DisasContext *s, uint32_t insn)
{
int opcode = extract32(insn, 10, 2);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
bool feature;
switch (opcode) {
case 0: /* SHA512SU0 */
feature = dc_isar_feature(aa64_sha512, s);
break;
case 1: /* SM4E */
feature = dc_isar_feature(aa64_sm4, s);
break;
default:
unallocated_encoding(s);
return;
}
if (!feature) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
switch (opcode) {
case 0: /* SHA512SU0 */
gen_gvec_op2_ool(s, true, rd, rn, 0, gen_helper_crypto_sha512su0);
break;
case 1: /* SM4E */
gen_gvec_op3_ool(s, true, rd, rd, rn, 0, gen_helper_crypto_sm4e);
break;
default:
g_assert_not_reached();
}
}
/* Crypto four-register
* 31 23 22 21 20 16 15 14 10 9 5 4 0
* +-------------------+-----+------+---+------+------+------+
* | 1 1 0 0 1 1 1 0 0 | Op0 | Rm | 0 | Ra | Rn | Rd |
* +-------------------+-----+------+---+------+------+------+
*/
static void disas_crypto_four_reg(DisasContext *s, uint32_t insn)
{
int op0 = extract32(insn, 21, 2);
int rm = extract32(insn, 16, 5);
int ra = extract32(insn, 10, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
bool feature;
switch (op0) {
case 0: /* EOR3 */
case 1: /* BCAX */
feature = dc_isar_feature(aa64_sha3, s);
break;
case 2: /* SM3SS1 */
feature = dc_isar_feature(aa64_sm3, s);
break;
default:
unallocated_encoding(s);
return;
}
if (!feature) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
if (op0 < 2) {
TCGv_i64 tcg_op1, tcg_op2, tcg_op3, tcg_res[2];
int pass;
tcg_op1 = tcg_temp_new_i64();
tcg_op2 = tcg_temp_new_i64();
tcg_op3 = tcg_temp_new_i64();
tcg_res[0] = tcg_temp_new_i64();
tcg_res[1] = tcg_temp_new_i64();
for (pass = 0; pass < 2; pass++) {
read_vec_element(s, tcg_op1, rn, pass, MO_64);
read_vec_element(s, tcg_op2, rm, pass, MO_64);
read_vec_element(s, tcg_op3, ra, pass, MO_64);
if (op0 == 0) {
/* EOR3 */
tcg_gen_xor_i64(tcg_res[pass], tcg_op2, tcg_op3);
} else {
/* BCAX */
tcg_gen_andc_i64(tcg_res[pass], tcg_op2, tcg_op3);
}
tcg_gen_xor_i64(tcg_res[pass], tcg_res[pass], tcg_op1);
}
write_vec_element(s, tcg_res[0], rd, 0, MO_64);
write_vec_element(s, tcg_res[1], rd, 1, MO_64);
} else {
TCGv_i32 tcg_op1, tcg_op2, tcg_op3, tcg_res, tcg_zero;
tcg_op1 = tcg_temp_new_i32();
tcg_op2 = tcg_temp_new_i32();
tcg_op3 = tcg_temp_new_i32();
tcg_res = tcg_temp_new_i32();
tcg_zero = tcg_constant_i32(0);
read_vec_element_i32(s, tcg_op1, rn, 3, MO_32);
read_vec_element_i32(s, tcg_op2, rm, 3, MO_32);
read_vec_element_i32(s, tcg_op3, ra, 3, MO_32);
tcg_gen_rotri_i32(tcg_res, tcg_op1, 20);
tcg_gen_add_i32(tcg_res, tcg_res, tcg_op2);
tcg_gen_add_i32(tcg_res, tcg_res, tcg_op3);
tcg_gen_rotri_i32(tcg_res, tcg_res, 25);
write_vec_element_i32(s, tcg_zero, rd, 0, MO_32);
write_vec_element_i32(s, tcg_zero, rd, 1, MO_32);
write_vec_element_i32(s, tcg_zero, rd, 2, MO_32);
write_vec_element_i32(s, tcg_res, rd, 3, MO_32);
}
}
/* Crypto XAR
* 31 21 20 16 15 10 9 5 4 0
* +-----------------------+------+--------+------+------+
* | 1 1 0 0 1 1 1 0 1 0 0 | Rm | imm6 | Rn | Rd |
* +-----------------------+------+--------+------+------+
*/
static void disas_crypto_xar(DisasContext *s, uint32_t insn)
{
int rm = extract32(insn, 16, 5);
int imm6 = extract32(insn, 10, 6);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
if (!dc_isar_feature(aa64_sha3, s)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
gen_gvec_xar(MO_64, vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm), imm6, 16,
vec_full_reg_size(s));
}
/* Crypto three-reg imm2
* 31 21 20 16 15 14 13 12 11 10 9 5 4 0
* +-----------------------+------+-----+------+--------+------+------+
* | 1 1 0 0 1 1 1 0 0 1 0 | Rm | 1 0 | imm2 | opcode | Rn | Rd |
* +-----------------------+------+-----+------+--------+------+------+
*/
static void disas_crypto_three_reg_imm2(DisasContext *s, uint32_t insn)
{
static gen_helper_gvec_3 * const fns[4] = {
gen_helper_crypto_sm3tt1a, gen_helper_crypto_sm3tt1b,
gen_helper_crypto_sm3tt2a, gen_helper_crypto_sm3tt2b,
};
int opcode = extract32(insn, 10, 2);
int imm2 = extract32(insn, 12, 2);
int rm = extract32(insn, 16, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
if (!dc_isar_feature(aa64_sm3, s)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
gen_gvec_op3_ool(s, true, rd, rn, rm, imm2, fns[opcode]);
}
/* C3.6 Data processing - SIMD, inc Crypto
*
* As the decode gets a little complex we are using a table based
* approach for this part of the decode.
*/
static const AArch64DecodeTable data_proc_simd[] = {
/* pattern , mask , fn */
{ 0x0e200400, 0x9f200400, disas_simd_three_reg_same },
{ 0x0e008400, 0x9f208400, disas_simd_three_reg_same_extra },
{ 0x0e200000, 0x9f200c00, disas_simd_three_reg_diff },
{ 0x0e200800, 0x9f3e0c00, disas_simd_two_reg_misc },
{ 0x0e300800, 0x9f3e0c00, disas_simd_across_lanes },
{ 0x0e000400, 0x9fe08400, disas_simd_copy },
{ 0x0f000000, 0x9f000400, disas_simd_indexed }, /* vector indexed */
/* simd_mod_imm decode is a subset of simd_shift_imm, so must precede it */
{ 0x0f000400, 0x9ff80400, disas_simd_mod_imm },
{ 0x0f000400, 0x9f800400, disas_simd_shift_imm },
{ 0x0e000000, 0xbf208c00, disas_simd_tb },
{ 0x0e000800, 0xbf208c00, disas_simd_zip_trn },
{ 0x2e000000, 0xbf208400, disas_simd_ext },
{ 0x5e200400, 0xdf200400, disas_simd_scalar_three_reg_same },
{ 0x5e008400, 0xdf208400, disas_simd_scalar_three_reg_same_extra },
{ 0x5e200000, 0xdf200c00, disas_simd_scalar_three_reg_diff },
{ 0x5e200800, 0xdf3e0c00, disas_simd_scalar_two_reg_misc },
{ 0x5e300800, 0xdf3e0c00, disas_simd_scalar_pairwise },
{ 0x5e000400, 0xdfe08400, disas_simd_scalar_copy },
{ 0x5f000000, 0xdf000400, disas_simd_indexed }, /* scalar indexed */
{ 0x5f000400, 0xdf800400, disas_simd_scalar_shift_imm },
{ 0x4e280800, 0xff3e0c00, disas_crypto_aes },
{ 0x5e000000, 0xff208c00, disas_crypto_three_reg_sha },
{ 0x5e280800, 0xff3e0c00, disas_crypto_two_reg_sha },
{ 0xce608000, 0xffe0b000, disas_crypto_three_reg_sha512 },
{ 0xcec08000, 0xfffff000, disas_crypto_two_reg_sha512 },
{ 0xce000000, 0xff808000, disas_crypto_four_reg },
{ 0xce800000, 0xffe00000, disas_crypto_xar },
{ 0xce408000, 0xffe0c000, disas_crypto_three_reg_imm2 },
{ 0x0e400400, 0x9f60c400, disas_simd_three_reg_same_fp16 },
{ 0x0e780800, 0x8f7e0c00, disas_simd_two_reg_misc_fp16 },
{ 0x5e400400, 0xdf60c400, disas_simd_scalar_three_reg_same_fp16 },
{ 0x00000000, 0x00000000, NULL }
};
static void disas_data_proc_simd(DisasContext *s, uint32_t insn)
{
/* Note that this is called with all non-FP cases from
* table C3-6 so it must UNDEF for entries not specifically
* allocated to instructions in that table.
*/
AArch64DecodeFn *fn = lookup_disas_fn(&data_proc_simd[0], insn);
if (fn) {
fn(s, insn);
} else {
unallocated_encoding(s);
}
}
/* C3.6 Data processing - SIMD and floating point */
static void disas_data_proc_simd_fp(DisasContext *s, uint32_t insn)
{
if (extract32(insn, 28, 1) == 1 && extract32(insn, 30, 1) == 0) {
disas_data_proc_fp(s, insn);
} else {
/* SIMD, including crypto */
disas_data_proc_simd(s, insn);
}
}
static bool trans_OK(DisasContext *s, arg_OK *a)
{
return true;
}
static bool trans_FAIL(DisasContext *s, arg_OK *a)
{
s->is_nonstreaming = true;
return true;
}
/**
* is_guarded_page:
* @env: The cpu environment
* @s: The DisasContext
*
* Return true if the page is guarded.
*/
static bool is_guarded_page(CPUARMState *env, DisasContext *s)
{
uint64_t addr = s->base.pc_first;
#ifdef CONFIG_USER_ONLY
return page_get_flags(addr) & PAGE_BTI;
#else
CPUTLBEntryFull *full;
void *host;
int mmu_idx = arm_to_core_mmu_idx(s->mmu_idx);
int flags;
/*
* We test this immediately after reading an insn, which means
* that the TLB entry must be present and valid, and thus this
* access will never raise an exception.
*/
flags = probe_access_full(env, addr, 0, MMU_INST_FETCH, mmu_idx,
false, &host, &full, 0);
assert(!(flags & TLB_INVALID_MASK));
return full->extra.arm.guarded;
#endif
}
/**
* btype_destination_ok:
* @insn: The instruction at the branch destination
* @bt: SCTLR_ELx.BT
* @btype: PSTATE.BTYPE, and is non-zero
*
* On a guarded page, there are a limited number of insns
* that may be present at the branch target:
* - branch target identifiers,
* - paciasp, pacibsp,
* - BRK insn
* - HLT insn
* Anything else causes a Branch Target Exception.
*
* Return true if the branch is compatible, false to raise BTITRAP.
*/
static bool btype_destination_ok(uint32_t insn, bool bt, int btype)
{
if ((insn & 0xfffff01fu) == 0xd503201fu) {
/* HINT space */
switch (extract32(insn, 5, 7)) {
case 0b011001: /* PACIASP */
case 0b011011: /* PACIBSP */
/*
* If SCTLR_ELx.BT, then PACI*SP are not compatible
* with btype == 3. Otherwise all btype are ok.
*/
return !bt || btype != 3;
case 0b100000: /* BTI */
/* Not compatible with any btype. */
return false;
case 0b100010: /* BTI c */
/* Not compatible with btype == 3 */
return btype != 3;
case 0b100100: /* BTI j */
/* Not compatible with btype == 2 */
return btype != 2;
case 0b100110: /* BTI jc */
/* Compatible with any btype. */
return true;
}
} else {
switch (insn & 0xffe0001fu) {
case 0xd4200000u: /* BRK */
case 0xd4400000u: /* HLT */
/* Give priority to the breakpoint exception. */
return true;
}
}
return false;
}
/* C3.1 A64 instruction index by encoding */
static void disas_a64_legacy(DisasContext *s, uint32_t insn)
{
switch (extract32(insn, 25, 4)) {
case 0x5:
case 0xd: /* Data processing - register */
disas_data_proc_reg(s, insn);
break;
case 0x7:
case 0xf: /* Data processing - SIMD and floating point */
disas_data_proc_simd_fp(s, insn);
break;
default:
unallocated_encoding(s);
break;
}
}
static void aarch64_tr_init_disas_context(DisasContextBase *dcbase,
CPUState *cpu)
{
DisasContext *dc = container_of(dcbase, DisasContext, base);
CPUARMState *env = cpu_env(cpu);
ARMCPU *arm_cpu = env_archcpu(env);
CPUARMTBFlags tb_flags = arm_tbflags_from_tb(dc->base.tb);
int bound, core_mmu_idx;
dc->isar = &arm_cpu->isar;
dc->condjmp = 0;
dc->pc_save = dc->base.pc_first;
dc->aarch64 = true;
dc->thumb = false;
dc->sctlr_b = 0;
dc->be_data = EX_TBFLAG_ANY(tb_flags, BE_DATA) ? MO_BE : MO_LE;
dc->condexec_mask = 0;
dc->condexec_cond = 0;
core_mmu_idx = EX_TBFLAG_ANY(tb_flags, MMUIDX);
dc->mmu_idx = core_to_aa64_mmu_idx(core_mmu_idx);
dc->tbii = EX_TBFLAG_A64(tb_flags, TBII);
dc->tbid = EX_TBFLAG_A64(tb_flags, TBID);
dc->tcma = EX_TBFLAG_A64(tb_flags, TCMA);
dc->current_el = arm_mmu_idx_to_el(dc->mmu_idx);
#if !defined(CONFIG_USER_ONLY)
dc->user = (dc->current_el == 0);
#endif
dc->fp_excp_el = EX_TBFLAG_ANY(tb_flags, FPEXC_EL);
dc->align_mem = EX_TBFLAG_ANY(tb_flags, ALIGN_MEM);
dc->pstate_il = EX_TBFLAG_ANY(tb_flags, PSTATE__IL);
dc->fgt_active = EX_TBFLAG_ANY(tb_flags, FGT_ACTIVE);
dc->fgt_svc = EX_TBFLAG_ANY(tb_flags, FGT_SVC);
dc->trap_eret = EX_TBFLAG_A64(tb_flags, TRAP_ERET);
dc->sve_excp_el = EX_TBFLAG_A64(tb_flags, SVEEXC_EL);
dc->sme_excp_el = EX_TBFLAG_A64(tb_flags, SMEEXC_EL);
dc->vl = (EX_TBFLAG_A64(tb_flags, VL) + 1) * 16;
dc->svl = (EX_TBFLAG_A64(tb_flags, SVL) + 1) * 16;
dc->pauth_active = EX_TBFLAG_A64(tb_flags, PAUTH_ACTIVE);
dc->bt = EX_TBFLAG_A64(tb_flags, BT);
dc->btype = EX_TBFLAG_A64(tb_flags, BTYPE);
dc->unpriv = EX_TBFLAG_A64(tb_flags, UNPRIV);
dc->ata[0] = EX_TBFLAG_A64(tb_flags, ATA);
dc->ata[1] = EX_TBFLAG_A64(tb_flags, ATA0);
dc->mte_active[0] = EX_TBFLAG_A64(tb_flags, MTE_ACTIVE);
dc->mte_active[1] = EX_TBFLAG_A64(tb_flags, MTE0_ACTIVE);
dc->pstate_sm = EX_TBFLAG_A64(tb_flags, PSTATE_SM);
dc->pstate_za = EX_TBFLAG_A64(tb_flags, PSTATE_ZA);
dc->sme_trap_nonstreaming = EX_TBFLAG_A64(tb_flags, SME_TRAP_NONSTREAMING);
dc->naa = EX_TBFLAG_A64(tb_flags, NAA);
dc->nv = EX_TBFLAG_A64(tb_flags, NV);
dc->nv1 = EX_TBFLAG_A64(tb_flags, NV1);
dc->nv2 = EX_TBFLAG_A64(tb_flags, NV2);
dc->nv2_mem_e20 = EX_TBFLAG_A64(tb_flags, NV2_MEM_E20);
dc->nv2_mem_be = EX_TBFLAG_A64(tb_flags, NV2_MEM_BE);
dc->vec_len = 0;
dc->vec_stride = 0;
dc->cp_regs = arm_cpu->cp_regs;
dc->features = env->features;
dc->dcz_blocksize = arm_cpu->dcz_blocksize;
dc->gm_blocksize = arm_cpu->gm_blocksize;
#ifdef CONFIG_USER_ONLY
/* In sve_probe_page, we assume TBI is enabled. */
tcg_debug_assert(dc->tbid & 1);
#endif
dc->lse2 = dc_isar_feature(aa64_lse2, dc);
/* Single step state. The code-generation logic here is:
* SS_ACTIVE == 0:
* generate code with no special handling for single-stepping (except
* that anything that can make us go to SS_ACTIVE == 1 must end the TB;
* this happens anyway because those changes are all system register or
* PSTATE writes).
* SS_ACTIVE == 1, PSTATE.SS == 1: (active-not-pending)
* emit code for one insn
* emit code to clear PSTATE.SS
* emit code to generate software step exception for completed step
* end TB (as usual for having generated an exception)
* SS_ACTIVE == 1, PSTATE.SS == 0: (active-pending)
* emit code to generate a software step exception
* end the TB
*/
dc->ss_active = EX_TBFLAG_ANY(tb_flags, SS_ACTIVE);
dc->pstate_ss = EX_TBFLAG_ANY(tb_flags, PSTATE__SS);
dc->is_ldex = false;
/* Bound the number of insns to execute to those left on the page. */
bound = -(dc->base.pc_first | TARGET_PAGE_MASK) / 4;
/* If architectural single step active, limit to 1. */
if (dc->ss_active) {
bound = 1;
}
dc->base.max_insns = MIN(dc->base.max_insns, bound);
}
static void aarch64_tr_tb_start(DisasContextBase *db, CPUState *cpu)
{
}
static void aarch64_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu)
{
DisasContext *dc = container_of(dcbase, DisasContext, base);
target_ulong pc_arg = dc->base.pc_next;
if (tb_cflags(dcbase->tb) & CF_PCREL) {
pc_arg &= ~TARGET_PAGE_MASK;
}
tcg_gen_insn_start(pc_arg, 0, 0);
dc->insn_start = tcg_last_op();
}
static void aarch64_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu)
{
DisasContext *s = container_of(dcbase, DisasContext, base);
CPUARMState *env = cpu_env(cpu);
uint64_t pc = s->base.pc_next;
uint32_t insn;
/* Singlestep exceptions have the highest priority. */
if (s->ss_active && !s->pstate_ss) {
/* Singlestep state is Active-pending.
* If we're in this state at the start of a TB then either
* a) we just took an exception to an EL which is being debugged
* and this is the first insn in the exception handler
* b) debug exceptions were masked and we just unmasked them
* without changing EL (eg by clearing PSTATE.D)
* In either case we're going to take a swstep exception in the
* "did not step an insn" case, and so the syndrome ISV and EX
* bits should be zero.
*/
assert(s->base.num_insns == 1);
gen_swstep_exception(s, 0, 0);
s->base.is_jmp = DISAS_NORETURN;
s->base.pc_next = pc + 4;
return;
}
if (pc & 3) {
/*
* PC alignment fault. This has priority over the instruction abort
* that we would receive from a translation fault via arm_ldl_code.
* This should only be possible after an indirect branch, at the
* start of the TB.
*/
assert(s->base.num_insns == 1);
gen_helper_exception_pc_alignment(tcg_env, tcg_constant_tl(pc));
s->base.is_jmp = DISAS_NORETURN;
s->base.pc_next = QEMU_ALIGN_UP(pc, 4);
return;
}
s->pc_curr = pc;
insn = arm_ldl_code(env, &s->base, pc, s->sctlr_b);
s->insn = insn;
s->base.pc_next = pc + 4;
s->fp_access_checked = false;
s->sve_access_checked = false;
if (s->pstate_il) {
/*
* Illegal execution state. This has priority over BTI
* exceptions, but comes after instruction abort exceptions.
*/
gen_exception_insn(s, 0, EXCP_UDEF, syn_illegalstate());
return;
}
if (dc_isar_feature(aa64_bti, s)) {
if (s->base.num_insns == 1) {
/*
* At the first insn of the TB, compute s->guarded_page.
* We delayed computing this until successfully reading
* the first insn of the TB, above. This (mostly) ensures
* that the softmmu tlb entry has been populated, and the
* page table GP bit is available.
*
* Note that we need to compute this even if btype == 0,
* because this value is used for BR instructions later
* where ENV is not available.
*/
s->guarded_page = is_guarded_page(env, s);
/* First insn can have btype set to non-zero. */
tcg_debug_assert(s->btype >= 0);
/*
* Note that the Branch Target Exception has fairly high
* priority -- below debugging exceptions but above most
* everything else. This allows us to handle this now
* instead of waiting until the insn is otherwise decoded.
*/
if (s->btype != 0
&& s->guarded_page
&& !btype_destination_ok(insn, s->bt, s->btype)) {
gen_exception_insn(s, 0, EXCP_UDEF, syn_btitrap(s->btype));
return;
}
} else {
/* Not the first insn: btype must be 0. */
tcg_debug_assert(s->btype == 0);
}
}
s->is_nonstreaming = false;
if (s->sme_trap_nonstreaming) {
disas_sme_fa64(s, insn);
}
if (!disas_a64(s, insn) &&
!disas_sme(s, insn) &&
!disas_sve(s, insn)) {
disas_a64_legacy(s, insn);
}
/*
* After execution of most insns, btype is reset to 0.
* Note that we set btype == -1 when the insn sets btype.
*/
if (s->btype > 0 && s->base.is_jmp != DISAS_NORETURN) {
reset_btype(s);
}
}
static void aarch64_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu)
{
DisasContext *dc = container_of(dcbase, DisasContext, base);
if (unlikely(dc->ss_active)) {
/* Note that this means single stepping WFI doesn't halt the CPU.
* For conditional branch insns this is harmless unreachable code as
* gen_goto_tb() has already handled emitting the debug exception
* (and thus a tb-jump is not possible when singlestepping).
*/
switch (dc->base.is_jmp) {
default:
gen_a64_update_pc(dc, 4);
/* fall through */
case DISAS_EXIT:
case DISAS_JUMP:
gen_step_complete_exception(dc);
break;
case DISAS_NORETURN:
break;
}
} else {
switch (dc->base.is_jmp) {
case DISAS_NEXT:
case DISAS_TOO_MANY:
gen_goto_tb(dc, 1, 4);
break;
default:
case DISAS_UPDATE_EXIT:
gen_a64_update_pc(dc, 4);
/* fall through */
case DISAS_EXIT:
tcg_gen_exit_tb(NULL, 0);
break;
case DISAS_UPDATE_NOCHAIN:
gen_a64_update_pc(dc, 4);
/* fall through */
case DISAS_JUMP:
tcg_gen_lookup_and_goto_ptr();
break;
case DISAS_NORETURN:
case DISAS_SWI:
break;
case DISAS_WFE:
gen_a64_update_pc(dc, 4);
gen_helper_wfe(tcg_env);
break;
case DISAS_YIELD:
gen_a64_update_pc(dc, 4);
gen_helper_yield(tcg_env);
break;
case DISAS_WFI:
/*
* This is a special case because we don't want to just halt
* the CPU if trying to debug across a WFI.
*/
gen_a64_update_pc(dc, 4);
gen_helper_wfi(tcg_env, tcg_constant_i32(4));
/*
* The helper doesn't necessarily throw an exception, but we
* must go back to the main loop to check for interrupts anyway.
*/
tcg_gen_exit_tb(NULL, 0);
break;
}
}
}
static void aarch64_tr_disas_log(const DisasContextBase *dcbase,
CPUState *cpu, FILE *logfile)
{
DisasContext *dc = container_of(dcbase, DisasContext, base);
fprintf(logfile, "IN: %s\n", lookup_symbol(dc->base.pc_first));
target_disas(logfile, cpu, dc->base.pc_first, dc->base.tb->size);
}
const TranslatorOps aarch64_translator_ops = {
.init_disas_context = aarch64_tr_init_disas_context,
.tb_start = aarch64_tr_tb_start,
.insn_start = aarch64_tr_insn_start,
.translate_insn = aarch64_tr_translate_insn,
.tb_stop = aarch64_tr_tb_stop,
.disas_log = aarch64_tr_disas_log,
};
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