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qemu-e2k/target/m68k/translate.c
Mark Cave-Ayland 5e50c6c72b target/m68k: implement m68k "any instruction" trace mode 
The m68k trace mode is controlled by the top 2 bits in the SR register. Implement
the m68k "any instruction" trace mode where bit T1=1 and bit T0=0 in which the CPU
generates an EXCP_TRACE exception (vector 9 or offset 0x24) after executing each
instruction.

This functionality is used by the NetBSD kernel debugger to allow single-stepping
on m68k architectures.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210519142917.16693-5-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-26 20:45:18 +02:00

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/*
* m68k translation
*
* Copyright (c) 2005-2007 CodeSourcery
* Written by Paul Brook
*
* 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 "cpu.h"
#include "disas/disas.h"
#include "exec/exec-all.h"
#include "tcg/tcg-op.h"
#include "qemu/log.h"
#include "qemu/qemu-print.h"
#include "exec/cpu_ldst.h"
#include "exec/translator.h"
#include "exec/helper-proto.h"
#include "exec/helper-gen.h"
#include "trace-tcg.h"
#include "exec/log.h"
#include "fpu/softfloat.h"
//#define DEBUG_DISPATCH 1
#define DEFO32(name, offset) static TCGv QREG_##name;
#define DEFO64(name, offset) static TCGv_i64 QREG_##name;
#include "qregs.def"
#undef DEFO32
#undef DEFO64
static TCGv_i32 cpu_halted;
static TCGv_i32 cpu_exception_index;
static char cpu_reg_names[2 * 8 * 3 + 5 * 4];
static TCGv cpu_dregs[8];
static TCGv cpu_aregs[8];
static TCGv_i64 cpu_macc[4];
#define REG(insn, pos) (((insn) >> (pos)) & 7)
#define DREG(insn, pos) cpu_dregs[REG(insn, pos)]
#define AREG(insn, pos) get_areg(s, REG(insn, pos))
#define MACREG(acc) cpu_macc[acc]
#define QREG_SP get_areg(s, 7)
static TCGv NULL_QREG;
#define IS_NULL_QREG(t) (t == NULL_QREG)
/* Used to distinguish stores from bad addressing modes. */
static TCGv store_dummy;
#include "exec/gen-icount.h"
void m68k_tcg_init(void)
{
char *p;
int i;
#define DEFO32(name, offset) \
QREG_##name = tcg_global_mem_new_i32(cpu_env, \
offsetof(CPUM68KState, offset), #name);
#define DEFO64(name, offset) \
QREG_##name = tcg_global_mem_new_i64(cpu_env, \
offsetof(CPUM68KState, offset), #name);
#include "qregs.def"
#undef DEFO32
#undef DEFO64
cpu_halted = tcg_global_mem_new_i32(cpu_env,
-offsetof(M68kCPU, env) +
offsetof(CPUState, halted), "HALTED");
cpu_exception_index = tcg_global_mem_new_i32(cpu_env,
-offsetof(M68kCPU, env) +
offsetof(CPUState, exception_index),
"EXCEPTION");
p = cpu_reg_names;
for (i = 0; i < 8; i++) {
sprintf(p, "D%d", i);
cpu_dregs[i] = tcg_global_mem_new(cpu_env,
offsetof(CPUM68KState, dregs[i]), p);
p += 3;
sprintf(p, "A%d", i);
cpu_aregs[i] = tcg_global_mem_new(cpu_env,
offsetof(CPUM68KState, aregs[i]), p);
p += 3;
}
for (i = 0; i < 4; i++) {
sprintf(p, "ACC%d", i);
cpu_macc[i] = tcg_global_mem_new_i64(cpu_env,
offsetof(CPUM68KState, macc[i]), p);
p += 5;
}
NULL_QREG = tcg_global_mem_new(cpu_env, -4, "NULL");
store_dummy = tcg_global_mem_new(cpu_env, -8, "NULL");
}
/* internal defines */
typedef struct DisasContext {
DisasContextBase base;
CPUM68KState *env;
target_ulong pc;
CCOp cc_op; /* Current CC operation */
int cc_op_synced;
TCGv_i64 mactmp;
int done_mac;
int writeback_mask;
TCGv writeback[8];
#define MAX_TO_RELEASE 8
int release_count;
TCGv release[MAX_TO_RELEASE];
bool ss_active;
} DisasContext;
static void init_release_array(DisasContext *s)
{
#ifdef CONFIG_DEBUG_TCG
memset(s->release, 0, sizeof(s->release));
#endif
s->release_count = 0;
}
static void do_release(DisasContext *s)
{
int i;
for (i = 0; i < s->release_count; i++) {
tcg_temp_free(s->release[i]);
}
init_release_array(s);
}
static TCGv mark_to_release(DisasContext *s, TCGv tmp)
{
g_assert(s->release_count < MAX_TO_RELEASE);
return s->release[s->release_count++] = tmp;
}
static TCGv get_areg(DisasContext *s, unsigned regno)
{
if (s->writeback_mask & (1 << regno)) {
return s->writeback[regno];
} else {
return cpu_aregs[regno];
}
}
static void delay_set_areg(DisasContext *s, unsigned regno,
TCGv val, bool give_temp)
{
if (s->writeback_mask & (1 << regno)) {
if (give_temp) {
tcg_temp_free(s->writeback[regno]);
s->writeback[regno] = val;
} else {
tcg_gen_mov_i32(s->writeback[regno], val);
}
} else {
s->writeback_mask |= 1 << regno;
if (give_temp) {
s->writeback[regno] = val;
} else {
TCGv tmp = tcg_temp_new();
s->writeback[regno] = tmp;
tcg_gen_mov_i32(tmp, val);
}
}
}
static void do_writebacks(DisasContext *s)
{
unsigned mask = s->writeback_mask;
if (mask) {
s->writeback_mask = 0;
do {
unsigned regno = ctz32(mask);
tcg_gen_mov_i32(cpu_aregs[regno], s->writeback[regno]);
tcg_temp_free(s->writeback[regno]);
mask &= mask - 1;
} while (mask);
}
}
static bool is_singlestepping(DisasContext *s)
{
/*
* Return true if we are singlestepping either because of
* architectural singlestep or QEMU gdbstub singlestep. This does
* not include the command line '-singlestep' mode which is rather
* misnamed as it only means "one instruction per TB" and doesn't
* affect the code we generate.
*/
return s->base.singlestep_enabled || s->ss_active;
}
/* is_jmp field values */
#define DISAS_JUMP DISAS_TARGET_0 /* only pc was modified dynamically */
#define DISAS_EXIT DISAS_TARGET_1 /* cpu state was modified dynamically */
#if defined(CONFIG_USER_ONLY)
#define IS_USER(s) 1
#else
#define IS_USER(s) (!(s->base.tb->flags & TB_FLAGS_MSR_S))
#define SFC_INDEX(s) ((s->base.tb->flags & TB_FLAGS_SFC_S) ? \
MMU_KERNEL_IDX : MMU_USER_IDX)
#define DFC_INDEX(s) ((s->base.tb->flags & TB_FLAGS_DFC_S) ? \
MMU_KERNEL_IDX : MMU_USER_IDX)
#endif
typedef void (*disas_proc)(CPUM68KState *env, DisasContext *s, uint16_t insn);
#ifdef DEBUG_DISPATCH
#define DISAS_INSN(name) \
static void real_disas_##name(CPUM68KState *env, DisasContext *s, \
uint16_t insn); \
static void disas_##name(CPUM68KState *env, DisasContext *s, \
uint16_t insn) \
{ \
qemu_log("Dispatch " #name "\n"); \
real_disas_##name(env, s, insn); \
} \
static void real_disas_##name(CPUM68KState *env, DisasContext *s, \
uint16_t insn)
#else
#define DISAS_INSN(name) \
static void disas_##name(CPUM68KState *env, DisasContext *s, \
uint16_t insn)
#endif
static const uint8_t cc_op_live[CC_OP_NB] = {
[CC_OP_DYNAMIC] = CCF_C | CCF_V | CCF_Z | CCF_N | CCF_X,
[CC_OP_FLAGS] = CCF_C | CCF_V | CCF_Z | CCF_N | CCF_X,
[CC_OP_ADDB ... CC_OP_ADDL] = CCF_X | CCF_N | CCF_V,
[CC_OP_SUBB ... CC_OP_SUBL] = CCF_X | CCF_N | CCF_V,
[CC_OP_CMPB ... CC_OP_CMPL] = CCF_X | CCF_N | CCF_V,
[CC_OP_LOGIC] = CCF_X | CCF_N
};
static void set_cc_op(DisasContext *s, CCOp op)
{
CCOp old_op = s->cc_op;
int dead;
if (old_op == op) {
return;
}
s->cc_op = op;
s->cc_op_synced = 0;
/*
* Discard CC computation that will no longer be used.
* Note that X and N are never dead.
*/
dead = cc_op_live[old_op] & ~cc_op_live[op];
if (dead & CCF_C) {
tcg_gen_discard_i32(QREG_CC_C);
}
if (dead & CCF_Z) {
tcg_gen_discard_i32(QREG_CC_Z);
}
if (dead & CCF_V) {
tcg_gen_discard_i32(QREG_CC_V);
}
}
/* Update the CPU env CC_OP state. */
static void update_cc_op(DisasContext *s)
{
if (!s->cc_op_synced) {
s->cc_op_synced = 1;
tcg_gen_movi_i32(QREG_CC_OP, s->cc_op);
}
}
/* Generate a jump to an immediate address. */
static void gen_jmp_im(DisasContext *s, uint32_t dest)
{
update_cc_op(s);
tcg_gen_movi_i32(QREG_PC, dest);
s->base.is_jmp = DISAS_JUMP;
}
/* Generate a jump to the address in qreg DEST. */
static void gen_jmp(DisasContext *s, TCGv dest)
{
update_cc_op(s);
tcg_gen_mov_i32(QREG_PC, dest);
s->base.is_jmp = DISAS_JUMP;
}
static void gen_raise_exception(int nr)
{
TCGv_i32 tmp;
tmp = tcg_const_i32(nr);
gen_helper_raise_exception(cpu_env, tmp);
tcg_temp_free_i32(tmp);
}
static void gen_exception(DisasContext *s, uint32_t dest, int nr)
{
update_cc_op(s);
tcg_gen_movi_i32(QREG_PC, dest);
gen_raise_exception(nr);
s->base.is_jmp = DISAS_NORETURN;
}
static void gen_singlestep_exception(DisasContext *s)
{
/*
* Generate the right kind of exception for singlestep, which is
* either the architectural singlestep or EXCP_DEBUG for QEMU's
* gdb singlestepping.
*/
if (s->ss_active) {
gen_raise_exception(EXCP_TRACE);
} else {
gen_raise_exception(EXCP_DEBUG);
}
}
static inline void gen_addr_fault(DisasContext *s)
{
gen_exception(s, s->base.pc_next, EXCP_ADDRESS);
}
/*
* Generate a load from the specified address. Narrow values are
* sign extended to full register width.
*/
static inline TCGv gen_load(DisasContext *s, int opsize, TCGv addr,
int sign, int index)
{
TCGv tmp;
tmp = tcg_temp_new_i32();
switch(opsize) {
case OS_BYTE:
if (sign)
tcg_gen_qemu_ld8s(tmp, addr, index);
else
tcg_gen_qemu_ld8u(tmp, addr, index);
break;
case OS_WORD:
if (sign)
tcg_gen_qemu_ld16s(tmp, addr, index);
else
tcg_gen_qemu_ld16u(tmp, addr, index);
break;
case OS_LONG:
tcg_gen_qemu_ld32u(tmp, addr, index);
break;
default:
g_assert_not_reached();
}
return tmp;
}
/* Generate a store. */
static inline void gen_store(DisasContext *s, int opsize, TCGv addr, TCGv val,
int index)
{
switch(opsize) {
case OS_BYTE:
tcg_gen_qemu_st8(val, addr, index);
break;
case OS_WORD:
tcg_gen_qemu_st16(val, addr, index);
break;
case OS_LONG:
tcg_gen_qemu_st32(val, addr, index);
break;
default:
g_assert_not_reached();
}
}
typedef enum {
EA_STORE,
EA_LOADU,
EA_LOADS
} ea_what;
/*
* Generate an unsigned load if VAL is 0 a signed load if val is -1,
* otherwise generate a store.
*/
static TCGv gen_ldst(DisasContext *s, int opsize, TCGv addr, TCGv val,
ea_what what, int index)
{
if (what == EA_STORE) {
gen_store(s, opsize, addr, val, index);
return store_dummy;
} else {
return mark_to_release(s, gen_load(s, opsize, addr,
what == EA_LOADS, index));
}
}
/* Read a 16-bit immediate constant */
static inline uint16_t read_im16(CPUM68KState *env, DisasContext *s)
{
uint16_t im;
im = translator_lduw(env, s->pc);
s->pc += 2;
return im;
}
/* Read an 8-bit immediate constant */
static inline uint8_t read_im8(CPUM68KState *env, DisasContext *s)
{
return read_im16(env, s);
}
/* Read a 32-bit immediate constant. */
static inline uint32_t read_im32(CPUM68KState *env, DisasContext *s)
{
uint32_t im;
im = read_im16(env, s) << 16;
im |= 0xffff & read_im16(env, s);
return im;
}
/* Read a 64-bit immediate constant. */
static inline uint64_t read_im64(CPUM68KState *env, DisasContext *s)
{
uint64_t im;
im = (uint64_t)read_im32(env, s) << 32;
im |= (uint64_t)read_im32(env, s);
return im;
}
/* Calculate and address index. */
static TCGv gen_addr_index(DisasContext *s, uint16_t ext, TCGv tmp)
{
TCGv add;
int scale;
add = (ext & 0x8000) ? AREG(ext, 12) : DREG(ext, 12);
if ((ext & 0x800) == 0) {
tcg_gen_ext16s_i32(tmp, add);
add = tmp;
}
scale = (ext >> 9) & 3;
if (scale != 0) {
tcg_gen_shli_i32(tmp, add, scale);
add = tmp;
}
return add;
}
/*
* Handle a base + index + displacement effective address.
* A NULL_QREG base means pc-relative.
*/
static TCGv gen_lea_indexed(CPUM68KState *env, DisasContext *s, TCGv base)
{
uint32_t offset;
uint16_t ext;
TCGv add;
TCGv tmp;
uint32_t bd, od;
offset = s->pc;
ext = read_im16(env, s);
if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX))
return NULL_QREG;
if (m68k_feature(s->env, M68K_FEATURE_M68000) &&
!m68k_feature(s->env, M68K_FEATURE_SCALED_INDEX)) {
ext &= ~(3 << 9);
}
if (ext & 0x100) {
/* full extension word format */
if (!m68k_feature(s->env, M68K_FEATURE_EXT_FULL))
return NULL_QREG;
if ((ext & 0x30) > 0x10) {
/* base displacement */
if ((ext & 0x30) == 0x20) {
bd = (int16_t)read_im16(env, s);
} else {
bd = read_im32(env, s);
}
} else {
bd = 0;
}
tmp = mark_to_release(s, tcg_temp_new());
if ((ext & 0x44) == 0) {
/* pre-index */
add = gen_addr_index(s, ext, tmp);
} else {
add = NULL_QREG;
}
if ((ext & 0x80) == 0) {
/* base not suppressed */
if (IS_NULL_QREG(base)) {
base = mark_to_release(s, tcg_const_i32(offset + bd));
bd = 0;
}
if (!IS_NULL_QREG(add)) {
tcg_gen_add_i32(tmp, add, base);
add = tmp;
} else {
add = base;
}
}
if (!IS_NULL_QREG(add)) {
if (bd != 0) {
tcg_gen_addi_i32(tmp, add, bd);
add = tmp;
}
} else {
add = mark_to_release(s, tcg_const_i32(bd));
}
if ((ext & 3) != 0) {
/* memory indirect */
base = mark_to_release(s, gen_load(s, OS_LONG, add, 0, IS_USER(s)));
if ((ext & 0x44) == 4) {
add = gen_addr_index(s, ext, tmp);
tcg_gen_add_i32(tmp, add, base);
add = tmp;
} else {
add = base;
}
if ((ext & 3) > 1) {
/* outer displacement */
if ((ext & 3) == 2) {
od = (int16_t)read_im16(env, s);
} else {
od = read_im32(env, s);
}
} else {
od = 0;
}
if (od != 0) {
tcg_gen_addi_i32(tmp, add, od);
add = tmp;
}
}
} else {
/* brief extension word format */
tmp = mark_to_release(s, tcg_temp_new());
add = gen_addr_index(s, ext, tmp);
if (!IS_NULL_QREG(base)) {
tcg_gen_add_i32(tmp, add, base);
if ((int8_t)ext)
tcg_gen_addi_i32(tmp, tmp, (int8_t)ext);
} else {
tcg_gen_addi_i32(tmp, add, offset + (int8_t)ext);
}
add = tmp;
}
return add;
}
/* Sign or zero extend a value. */
static inline void gen_ext(TCGv res, TCGv val, int opsize, int sign)
{
switch (opsize) {
case OS_BYTE:
if (sign) {
tcg_gen_ext8s_i32(res, val);
} else {
tcg_gen_ext8u_i32(res, val);
}
break;
case OS_WORD:
if (sign) {
tcg_gen_ext16s_i32(res, val);
} else {
tcg_gen_ext16u_i32(res, val);
}
break;
case OS_LONG:
tcg_gen_mov_i32(res, val);
break;
default:
g_assert_not_reached();
}
}
/* Evaluate all the CC flags. */
static void gen_flush_flags(DisasContext *s)
{
TCGv t0, t1;
switch (s->cc_op) {
case CC_OP_FLAGS:
return;
case CC_OP_ADDB:
case CC_OP_ADDW:
case CC_OP_ADDL:
tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
/* Compute signed overflow for addition. */
t0 = tcg_temp_new();
t1 = tcg_temp_new();
tcg_gen_sub_i32(t0, QREG_CC_N, QREG_CC_V);
gen_ext(t0, t0, s->cc_op - CC_OP_ADDB, 1);
tcg_gen_xor_i32(t1, QREG_CC_N, QREG_CC_V);
tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0);
tcg_temp_free(t0);
tcg_gen_andc_i32(QREG_CC_V, t1, QREG_CC_V);
tcg_temp_free(t1);
break;
case CC_OP_SUBB:
case CC_OP_SUBW:
case CC_OP_SUBL:
tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
/* Compute signed overflow for subtraction. */
t0 = tcg_temp_new();
t1 = tcg_temp_new();
tcg_gen_add_i32(t0, QREG_CC_N, QREG_CC_V);
gen_ext(t0, t0, s->cc_op - CC_OP_SUBB, 1);
tcg_gen_xor_i32(t1, QREG_CC_N, t0);
tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0);
tcg_temp_free(t0);
tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t1);
tcg_temp_free(t1);
break;
case CC_OP_CMPB:
case CC_OP_CMPW:
case CC_OP_CMPL:
tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_C, QREG_CC_N, QREG_CC_V);
tcg_gen_sub_i32(QREG_CC_Z, QREG_CC_N, QREG_CC_V);
gen_ext(QREG_CC_Z, QREG_CC_Z, s->cc_op - CC_OP_CMPB, 1);
/* Compute signed overflow for subtraction. */
t0 = tcg_temp_new();
tcg_gen_xor_i32(t0, QREG_CC_Z, QREG_CC_N);
tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, QREG_CC_N);
tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t0);
tcg_temp_free(t0);
tcg_gen_mov_i32(QREG_CC_N, QREG_CC_Z);
break;
case CC_OP_LOGIC:
tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
tcg_gen_movi_i32(QREG_CC_C, 0);
tcg_gen_movi_i32(QREG_CC_V, 0);
break;
case CC_OP_DYNAMIC:
gen_helper_flush_flags(cpu_env, QREG_CC_OP);
s->cc_op_synced = 1;
break;
default:
t0 = tcg_const_i32(s->cc_op);
gen_helper_flush_flags(cpu_env, t0);
tcg_temp_free(t0);
s->cc_op_synced = 1;
break;
}
/* Note that flush_flags also assigned to env->cc_op. */
s->cc_op = CC_OP_FLAGS;
}
static inline TCGv gen_extend(DisasContext *s, TCGv val, int opsize, int sign)
{
TCGv tmp;
if (opsize == OS_LONG) {
tmp = val;
} else {
tmp = mark_to_release(s, tcg_temp_new());
gen_ext(tmp, val, opsize, sign);
}
return tmp;
}
static void gen_logic_cc(DisasContext *s, TCGv val, int opsize)
{
gen_ext(QREG_CC_N, val, opsize, 1);
set_cc_op(s, CC_OP_LOGIC);
}
static void gen_update_cc_cmp(DisasContext *s, TCGv dest, TCGv src, int opsize)
{
tcg_gen_mov_i32(QREG_CC_N, dest);
tcg_gen_mov_i32(QREG_CC_V, src);
set_cc_op(s, CC_OP_CMPB + opsize);
}
static void gen_update_cc_add(TCGv dest, TCGv src, int opsize)
{
gen_ext(QREG_CC_N, dest, opsize, 1);
tcg_gen_mov_i32(QREG_CC_V, src);
}
static inline int opsize_bytes(int opsize)
{
switch (opsize) {
case OS_BYTE: return 1;
case OS_WORD: return 2;
case OS_LONG: return 4;
case OS_SINGLE: return 4;
case OS_DOUBLE: return 8;
case OS_EXTENDED: return 12;
case OS_PACKED: return 12;
default:
g_assert_not_reached();
}
}
static inline int insn_opsize(int insn)
{
switch ((insn >> 6) & 3) {
case 0: return OS_BYTE;
case 1: return OS_WORD;
case 2: return OS_LONG;
default:
g_assert_not_reached();
}
}
static inline int ext_opsize(int ext, int pos)
{
switch ((ext >> pos) & 7) {
case 0: return OS_LONG;
case 1: return OS_SINGLE;
case 2: return OS_EXTENDED;
case 3: return OS_PACKED;
case 4: return OS_WORD;
case 5: return OS_DOUBLE;
case 6: return OS_BYTE;
default:
g_assert_not_reached();
}
}
/*
* Assign value to a register. If the width is less than the register width
* only the low part of the register is set.
*/
static void gen_partset_reg(int opsize, TCGv reg, TCGv val)
{
TCGv tmp;
switch (opsize) {
case OS_BYTE:
tcg_gen_andi_i32(reg, reg, 0xffffff00);
tmp = tcg_temp_new();
tcg_gen_ext8u_i32(tmp, val);
tcg_gen_or_i32(reg, reg, tmp);
tcg_temp_free(tmp);
break;
case OS_WORD:
tcg_gen_andi_i32(reg, reg, 0xffff0000);
tmp = tcg_temp_new();
tcg_gen_ext16u_i32(tmp, val);
tcg_gen_or_i32(reg, reg, tmp);
tcg_temp_free(tmp);
break;
case OS_LONG:
case OS_SINGLE:
tcg_gen_mov_i32(reg, val);
break;
default:
g_assert_not_reached();
}
}
/*
* Generate code for an "effective address". Does not adjust the base
* register for autoincrement addressing modes.
*/
static TCGv gen_lea_mode(CPUM68KState *env, DisasContext *s,
int mode, int reg0, int opsize)
{
TCGv reg;
TCGv tmp;
uint16_t ext;
uint32_t offset;
switch (mode) {
case 0: /* Data register direct. */
case 1: /* Address register direct. */
return NULL_QREG;
case 3: /* Indirect postincrement. */
if (opsize == OS_UNSIZED) {
return NULL_QREG;
}
/* fallthru */
case 2: /* Indirect register */
return get_areg(s, reg0);
case 4: /* Indirect predecrememnt. */
if (opsize == OS_UNSIZED) {
return NULL_QREG;
}
reg = get_areg(s, reg0);
tmp = mark_to_release(s, tcg_temp_new());
if (reg0 == 7 && opsize == OS_BYTE &&
m68k_feature(s->env, M68K_FEATURE_M68000)) {
tcg_gen_subi_i32(tmp, reg, 2);
} else {
tcg_gen_subi_i32(tmp, reg, opsize_bytes(opsize));
}
return tmp;
case 5: /* Indirect displacement. */
reg = get_areg(s, reg0);
tmp = mark_to_release(s, tcg_temp_new());
ext = read_im16(env, s);
tcg_gen_addi_i32(tmp, reg, (int16_t)ext);
return tmp;
case 6: /* Indirect index + displacement. */
reg = get_areg(s, reg0);
return gen_lea_indexed(env, s, reg);
case 7: /* Other */
switch (reg0) {
case 0: /* Absolute short. */
offset = (int16_t)read_im16(env, s);
return mark_to_release(s, tcg_const_i32(offset));
case 1: /* Absolute long. */
offset = read_im32(env, s);
return mark_to_release(s, tcg_const_i32(offset));
case 2: /* pc displacement */
offset = s->pc;
offset += (int16_t)read_im16(env, s);
return mark_to_release(s, tcg_const_i32(offset));
case 3: /* pc index+displacement. */
return gen_lea_indexed(env, s, NULL_QREG);
case 4: /* Immediate. */
default:
return NULL_QREG;
}
}
/* Should never happen. */
return NULL_QREG;
}
static TCGv gen_lea(CPUM68KState *env, DisasContext *s, uint16_t insn,
int opsize)
{
int mode = extract32(insn, 3, 3);
int reg0 = REG(insn, 0);
return gen_lea_mode(env, s, mode, reg0, opsize);
}
/*
* Generate code to load/store a value from/into an EA. If WHAT > 0 this is
* a write otherwise it is a read (0 == sign extend, -1 == zero extend).
* ADDRP is non-null for readwrite operands.
*/
static TCGv gen_ea_mode(CPUM68KState *env, DisasContext *s, int mode, int reg0,
int opsize, TCGv val, TCGv *addrp, ea_what what,
int index)
{
TCGv reg, tmp, result;
int32_t offset;
switch (mode) {
case 0: /* Data register direct. */
reg = cpu_dregs[reg0];
if (what == EA_STORE) {
gen_partset_reg(opsize, reg, val);
return store_dummy;
} else {
return gen_extend(s, reg, opsize, what == EA_LOADS);
}
case 1: /* Address register direct. */
reg = get_areg(s, reg0);
if (what == EA_STORE) {
tcg_gen_mov_i32(reg, val);
return store_dummy;
} else {
return gen_extend(s, reg, opsize, what == EA_LOADS);
}
case 2: /* Indirect register */
reg = get_areg(s, reg0);
return gen_ldst(s, opsize, reg, val, what, index);
case 3: /* Indirect postincrement. */
reg = get_areg(s, reg0);
result = gen_ldst(s, opsize, reg, val, what, index);
if (what == EA_STORE || !addrp) {
TCGv tmp = tcg_temp_new();
if (reg0 == 7 && opsize == OS_BYTE &&
m68k_feature(s->env, M68K_FEATURE_M68000)) {
tcg_gen_addi_i32(tmp, reg, 2);
} else {
tcg_gen_addi_i32(tmp, reg, opsize_bytes(opsize));
}
delay_set_areg(s, reg0, tmp, true);
}
return result;
case 4: /* Indirect predecrememnt. */
if (addrp && what == EA_STORE) {
tmp = *addrp;
} else {
tmp = gen_lea_mode(env, s, mode, reg0, opsize);
if (IS_NULL_QREG(tmp)) {
return tmp;
}
if (addrp) {
*addrp = tmp;
}
}
result = gen_ldst(s, opsize, tmp, val, what, index);
if (what == EA_STORE || !addrp) {
delay_set_areg(s, reg0, tmp, false);
}
return result;
case 5: /* Indirect displacement. */
case 6: /* Indirect index + displacement. */
do_indirect:
if (addrp && what == EA_STORE) {
tmp = *addrp;
} else {
tmp = gen_lea_mode(env, s, mode, reg0, opsize);
if (IS_NULL_QREG(tmp)) {
return tmp;
}
if (addrp) {
*addrp = tmp;
}
}
return gen_ldst(s, opsize, tmp, val, what, index);
case 7: /* Other */
switch (reg0) {
case 0: /* Absolute short. */
case 1: /* Absolute long. */
case 2: /* pc displacement */
case 3: /* pc index+displacement. */
goto do_indirect;
case 4: /* Immediate. */
/* Sign extend values for consistency. */
switch (opsize) {
case OS_BYTE:
if (what == EA_LOADS) {
offset = (int8_t)read_im8(env, s);
} else {
offset = read_im8(env, s);
}
break;
case OS_WORD:
if (what == EA_LOADS) {
offset = (int16_t)read_im16(env, s);
} else {
offset = read_im16(env, s);
}
break;
case OS_LONG:
offset = read_im32(env, s);
break;
default:
g_assert_not_reached();
}
return mark_to_release(s, tcg_const_i32(offset));
default:
return NULL_QREG;
}
}
/* Should never happen. */
return NULL_QREG;
}
static TCGv gen_ea(CPUM68KState *env, DisasContext *s, uint16_t insn,
int opsize, TCGv val, TCGv *addrp, ea_what what, int index)
{
int mode = extract32(insn, 3, 3);
int reg0 = REG(insn, 0);
return gen_ea_mode(env, s, mode, reg0, opsize, val, addrp, what, index);
}
static TCGv_ptr gen_fp_ptr(int freg)
{
TCGv_ptr fp = tcg_temp_new_ptr();
tcg_gen_addi_ptr(fp, cpu_env, offsetof(CPUM68KState, fregs[freg]));
return fp;
}
static TCGv_ptr gen_fp_result_ptr(void)
{
TCGv_ptr fp = tcg_temp_new_ptr();
tcg_gen_addi_ptr(fp, cpu_env, offsetof(CPUM68KState, fp_result));
return fp;
}
static void gen_fp_move(TCGv_ptr dest, TCGv_ptr src)
{
TCGv t32;
TCGv_i64 t64;
t32 = tcg_temp_new();
tcg_gen_ld16u_i32(t32, src, offsetof(FPReg, l.upper));
tcg_gen_st16_i32(t32, dest, offsetof(FPReg, l.upper));
tcg_temp_free(t32);
t64 = tcg_temp_new_i64();
tcg_gen_ld_i64(t64, src, offsetof(FPReg, l.lower));
tcg_gen_st_i64(t64, dest, offsetof(FPReg, l.lower));
tcg_temp_free_i64(t64);
}
static void gen_load_fp(DisasContext *s, int opsize, TCGv addr, TCGv_ptr fp,
int index)
{
TCGv tmp;
TCGv_i64 t64;
t64 = tcg_temp_new_i64();
tmp = tcg_temp_new();
switch (opsize) {
case OS_BYTE:
tcg_gen_qemu_ld8s(tmp, addr, index);
gen_helper_exts32(cpu_env, fp, tmp);
break;
case OS_WORD:
tcg_gen_qemu_ld16s(tmp, addr, index);
gen_helper_exts32(cpu_env, fp, tmp);
break;
case OS_LONG:
tcg_gen_qemu_ld32u(tmp, addr, index);
gen_helper_exts32(cpu_env, fp, tmp);
break;
case OS_SINGLE:
tcg_gen_qemu_ld32u(tmp, addr, index);
gen_helper_extf32(cpu_env, fp, tmp);
break;
case OS_DOUBLE:
tcg_gen_qemu_ld64(t64, addr, index);
gen_helper_extf64(cpu_env, fp, t64);
break;
case OS_EXTENDED:
if (m68k_feature(s->env, M68K_FEATURE_CF_FPU)) {
gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP);
break;
}
tcg_gen_qemu_ld32u(tmp, addr, index);
tcg_gen_shri_i32(tmp, tmp, 16);
tcg_gen_st16_i32(tmp, fp, offsetof(FPReg, l.upper));
tcg_gen_addi_i32(tmp, addr, 4);
tcg_gen_qemu_ld64(t64, tmp, index);
tcg_gen_st_i64(t64, fp, offsetof(FPReg, l.lower));
break;
case OS_PACKED:
/*
* unimplemented data type on 68040/ColdFire
* FIXME if needed for another FPU
*/
gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP);
break;
default:
g_assert_not_reached();
}
tcg_temp_free(tmp);
tcg_temp_free_i64(t64);
}
static void gen_store_fp(DisasContext *s, int opsize, TCGv addr, TCGv_ptr fp,
int index)
{
TCGv tmp;
TCGv_i64 t64;
t64 = tcg_temp_new_i64();
tmp = tcg_temp_new();
switch (opsize) {
case OS_BYTE:
gen_helper_reds32(tmp, cpu_env, fp);
tcg_gen_qemu_st8(tmp, addr, index);
break;
case OS_WORD:
gen_helper_reds32(tmp, cpu_env, fp);
tcg_gen_qemu_st16(tmp, addr, index);
break;
case OS_LONG:
gen_helper_reds32(tmp, cpu_env, fp);
tcg_gen_qemu_st32(tmp, addr, index);
break;
case OS_SINGLE:
gen_helper_redf32(tmp, cpu_env, fp);
tcg_gen_qemu_st32(tmp, addr, index);
break;
case OS_DOUBLE:
gen_helper_redf64(t64, cpu_env, fp);
tcg_gen_qemu_st64(t64, addr, index);
break;
case OS_EXTENDED:
if (m68k_feature(s->env, M68K_FEATURE_CF_FPU)) {
gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP);
break;
}
tcg_gen_ld16u_i32(tmp, fp, offsetof(FPReg, l.upper));
tcg_gen_shli_i32(tmp, tmp, 16);
tcg_gen_qemu_st32(tmp, addr, index);
tcg_gen_addi_i32(tmp, addr, 4);
tcg_gen_ld_i64(t64, fp, offsetof(FPReg, l.lower));
tcg_gen_qemu_st64(t64, tmp, index);
break;
case OS_PACKED:
/*
* unimplemented data type on 68040/ColdFire
* FIXME if needed for another FPU
*/
gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP);
break;
default:
g_assert_not_reached();
}
tcg_temp_free(tmp);
tcg_temp_free_i64(t64);
}
static void gen_ldst_fp(DisasContext *s, int opsize, TCGv addr,
TCGv_ptr fp, ea_what what, int index)
{
if (what == EA_STORE) {
gen_store_fp(s, opsize, addr, fp, index);
} else {
gen_load_fp(s, opsize, addr, fp, index);
}
}
static int gen_ea_mode_fp(CPUM68KState *env, DisasContext *s, int mode,
int reg0, int opsize, TCGv_ptr fp, ea_what what,
int index)
{
TCGv reg, addr, tmp;
TCGv_i64 t64;
switch (mode) {
case 0: /* Data register direct. */
reg = cpu_dregs[reg0];
if (what == EA_STORE) {
switch (opsize) {
case OS_BYTE:
case OS_WORD:
case OS_LONG:
gen_helper_reds32(reg, cpu_env, fp);
break;
case OS_SINGLE:
gen_helper_redf32(reg, cpu_env, fp);
break;
default:
g_assert_not_reached();
}
} else {
tmp = tcg_temp_new();
switch (opsize) {
case OS_BYTE:
tcg_gen_ext8s_i32(tmp, reg);
gen_helper_exts32(cpu_env, fp, tmp);
break;
case OS_WORD:
tcg_gen_ext16s_i32(tmp, reg);
gen_helper_exts32(cpu_env, fp, tmp);
break;
case OS_LONG:
gen_helper_exts32(cpu_env, fp, reg);
break;
case OS_SINGLE:
gen_helper_extf32(cpu_env, fp, reg);
break;
default:
g_assert_not_reached();
}
tcg_temp_free(tmp);
}
return 0;
case 1: /* Address register direct. */
return -1;
case 2: /* Indirect register */
addr = get_areg(s, reg0);
gen_ldst_fp(s, opsize, addr, fp, what, index);
return 0;
case 3: /* Indirect postincrement. */
addr = cpu_aregs[reg0];
gen_ldst_fp(s, opsize, addr, fp, what, index);
tcg_gen_addi_i32(addr, addr, opsize_bytes(opsize));
return 0;
case 4: /* Indirect predecrememnt. */
addr = gen_lea_mode(env, s, mode, reg0, opsize);
if (IS_NULL_QREG(addr)) {
return -1;
}
gen_ldst_fp(s, opsize, addr, fp, what, index);
tcg_gen_mov_i32(cpu_aregs[reg0], addr);
return 0;
case 5: /* Indirect displacement. */
case 6: /* Indirect index + displacement. */
do_indirect:
addr = gen_lea_mode(env, s, mode, reg0, opsize);
if (IS_NULL_QREG(addr)) {
return -1;
}
gen_ldst_fp(s, opsize, addr, fp, what, index);
return 0;
case 7: /* Other */
switch (reg0) {
case 0: /* Absolute short. */
case 1: /* Absolute long. */
case 2: /* pc displacement */
case 3: /* pc index+displacement. */
goto do_indirect;
case 4: /* Immediate. */
if (what == EA_STORE) {
return -1;
}
switch (opsize) {
case OS_BYTE:
tmp = tcg_const_i32((int8_t)read_im8(env, s));
gen_helper_exts32(cpu_env, fp, tmp);
tcg_temp_free(tmp);
break;
case OS_WORD:
tmp = tcg_const_i32((int16_t)read_im16(env, s));
gen_helper_exts32(cpu_env, fp, tmp);
tcg_temp_free(tmp);
break;
case OS_LONG:
tmp = tcg_const_i32(read_im32(env, s));
gen_helper_exts32(cpu_env, fp, tmp);
tcg_temp_free(tmp);
break;
case OS_SINGLE:
tmp = tcg_const_i32(read_im32(env, s));
gen_helper_extf32(cpu_env, fp, tmp);
tcg_temp_free(tmp);
break;
case OS_DOUBLE:
t64 = tcg_const_i64(read_im64(env, s));
gen_helper_extf64(cpu_env, fp, t64);
tcg_temp_free_i64(t64);
break;
case OS_EXTENDED:
if (m68k_feature(s->env, M68K_FEATURE_CF_FPU)) {
gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP);
break;
}
tmp = tcg_const_i32(read_im32(env, s) >> 16);
tcg_gen_st16_i32(tmp, fp, offsetof(FPReg, l.upper));
tcg_temp_free(tmp);
t64 = tcg_const_i64(read_im64(env, s));
tcg_gen_st_i64(t64, fp, offsetof(FPReg, l.lower));
tcg_temp_free_i64(t64);
break;
case OS_PACKED:
/*
* unimplemented data type on 68040/ColdFire
* FIXME if needed for another FPU
*/
gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP);
break;
default:
g_assert_not_reached();
}
return 0;
default:
return -1;
}
}
return -1;
}
static int gen_ea_fp(CPUM68KState *env, DisasContext *s, uint16_t insn,
int opsize, TCGv_ptr fp, ea_what what, int index)
{
int mode = extract32(insn, 3, 3);
int reg0 = REG(insn, 0);
return gen_ea_mode_fp(env, s, mode, reg0, opsize, fp, what, index);
}
typedef struct {
TCGCond tcond;
bool g1;
bool g2;
TCGv v1;
TCGv v2;
} DisasCompare;
static void gen_cc_cond(DisasCompare *c, DisasContext *s, int cond)
{
TCGv tmp, tmp2;
TCGCond tcond;
CCOp op = s->cc_op;
/* The CC_OP_CMP form can handle most normal comparisons directly. */
if (op == CC_OP_CMPB || op == CC_OP_CMPW || op == CC_OP_CMPL) {
c->g1 = c->g2 = 1;
c->v1 = QREG_CC_N;
c->v2 = QREG_CC_V;
switch (cond) {
case 2: /* HI */
case 3: /* LS */
tcond = TCG_COND_LEU;
goto done;
case 4: /* CC */
case 5: /* CS */
tcond = TCG_COND_LTU;
goto done;
case 6: /* NE */
case 7: /* EQ */
tcond = TCG_COND_EQ;
goto done;
case 10: /* PL */
case 11: /* MI */
c->g1 = c->g2 = 0;
c->v2 = tcg_const_i32(0);
c->v1 = tmp = tcg_temp_new();
tcg_gen_sub_i32(tmp, QREG_CC_N, QREG_CC_V);
gen_ext(tmp, tmp, op - CC_OP_CMPB, 1);
/* fallthru */
case 12: /* GE */
case 13: /* LT */
tcond = TCG_COND_LT;
goto done;
case 14: /* GT */
case 15: /* LE */
tcond = TCG_COND_LE;
goto done;
}
}
c->g1 = 1;
c->g2 = 0;
c->v2 = tcg_const_i32(0);
switch (cond) {
case 0: /* T */
case 1: /* F */
c->v1 = c->v2;
tcond = TCG_COND_NEVER;
goto done;
case 14: /* GT (!(Z || (N ^ V))) */
case 15: /* LE (Z || (N ^ V)) */
/*
* Logic operations clear V, which simplifies LE to (Z || N),
* and since Z and N are co-located, this becomes a normal
* comparison vs N.
*/
if (op == CC_OP_LOGIC) {
c->v1 = QREG_CC_N;
tcond = TCG_COND_LE;
goto done;
}
break;
case 12: /* GE (!(N ^ V)) */
case 13: /* LT (N ^ V) */
/* Logic operations clear V, which simplifies this to N. */
if (op != CC_OP_LOGIC) {
break;
}
/* fallthru */
case 10: /* PL (!N) */
case 11: /* MI (N) */
/* Several cases represent N normally. */
if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL ||
op == CC_OP_LOGIC) {
c->v1 = QREG_CC_N;
tcond = TCG_COND_LT;
goto done;
}
break;
case 6: /* NE (!Z) */
case 7: /* EQ (Z) */
/* Some cases fold Z into N. */
if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL ||
op == CC_OP_LOGIC) {
tcond = TCG_COND_EQ;
c->v1 = QREG_CC_N;
goto done;
}
break;
case 4: /* CC (!C) */
case 5: /* CS (C) */
/* Some cases fold C into X. */
if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL) {
tcond = TCG_COND_NE;
c->v1 = QREG_CC_X;
goto done;
}
/* fallthru */
case 8: /* VC (!V) */
case 9: /* VS (V) */
/* Logic operations clear V and C. */
if (op == CC_OP_LOGIC) {
tcond = TCG_COND_NEVER;
c->v1 = c->v2;
goto done;
}
break;
}
/* Otherwise, flush flag state to CC_OP_FLAGS. */
gen_flush_flags(s);
switch (cond) {
case 0: /* T */
case 1: /* F */
default:
/* Invalid, or handled above. */
abort();
case 2: /* HI (!C && !Z) -> !(C || Z)*/
case 3: /* LS (C || Z) */
c->v1 = tmp = tcg_temp_new();
c->g1 = 0;
tcg_gen_setcond_i32(TCG_COND_EQ, tmp, QREG_CC_Z, c->v2);
tcg_gen_or_i32(tmp, tmp, QREG_CC_C);
tcond = TCG_COND_NE;
break;
case 4: /* CC (!C) */
case 5: /* CS (C) */
c->v1 = QREG_CC_C;
tcond = TCG_COND_NE;
break;
case 6: /* NE (!Z) */
case 7: /* EQ (Z) */
c->v1 = QREG_CC_Z;
tcond = TCG_COND_EQ;
break;
case 8: /* VC (!V) */
case 9: /* VS (V) */
c->v1 = QREG_CC_V;
tcond = TCG_COND_LT;
break;
case 10: /* PL (!N) */
case 11: /* MI (N) */
c->v1 = QREG_CC_N;
tcond = TCG_COND_LT;
break;
case 12: /* GE (!(N ^ V)) */
case 13: /* LT (N ^ V) */
c->v1 = tmp = tcg_temp_new();
c->g1 = 0;
tcg_gen_xor_i32(tmp, QREG_CC_N, QREG_CC_V);
tcond = TCG_COND_LT;
break;
case 14: /* GT (!(Z || (N ^ V))) */
case 15: /* LE (Z || (N ^ V)) */
c->v1 = tmp = tcg_temp_new();
c->g1 = 0;
tcg_gen_setcond_i32(TCG_COND_EQ, tmp, QREG_CC_Z, c->v2);
tcg_gen_neg_i32(tmp, tmp);
tmp2 = tcg_temp_new();
tcg_gen_xor_i32(tmp2, QREG_CC_N, QREG_CC_V);
tcg_gen_or_i32(tmp, tmp, tmp2);
tcg_temp_free(tmp2);
tcond = TCG_COND_LT;
break;
}
done:
if ((cond & 1) == 0) {
tcond = tcg_invert_cond(tcond);
}
c->tcond = tcond;
}
static void free_cond(DisasCompare *c)
{
if (!c->g1) {
tcg_temp_free(c->v1);
}
if (!c->g2) {
tcg_temp_free(c->v2);
}
}
static void gen_jmpcc(DisasContext *s, int cond, TCGLabel *l1)
{
DisasCompare c;
gen_cc_cond(&c, s, cond);
update_cc_op(s);
tcg_gen_brcond_i32(c.tcond, c.v1, c.v2, l1);
free_cond(&c);
}
/* Force a TB lookup after an instruction that changes the CPU state. */
static void gen_exit_tb(DisasContext *s)
{
update_cc_op(s);
tcg_gen_movi_i32(QREG_PC, s->pc);
s->base.is_jmp = DISAS_EXIT;
}
#define SRC_EA(env, result, opsize, op_sign, addrp) do { \
result = gen_ea(env, s, insn, opsize, NULL_QREG, addrp, \
op_sign ? EA_LOADS : EA_LOADU, IS_USER(s)); \
if (IS_NULL_QREG(result)) { \
gen_addr_fault(s); \
return; \
} \
} while (0)
#define DEST_EA(env, insn, opsize, val, addrp) do { \
TCGv ea_result = gen_ea(env, s, insn, opsize, val, addrp, \
EA_STORE, IS_USER(s)); \
if (IS_NULL_QREG(ea_result)) { \
gen_addr_fault(s); \
return; \
} \
} while (0)
static inline bool use_goto_tb(DisasContext *s, uint32_t dest)
{
#ifndef CONFIG_USER_ONLY
return (s->base.pc_first & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)
|| (s->base.pc_next & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK);
#else
return true;
#endif
}
/* Generate a jump to an immediate address. */
static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest)
{
if (unlikely(is_singlestepping(s))) {
update_cc_op(s);
tcg_gen_movi_i32(QREG_PC, dest);
gen_singlestep_exception(s);
} else if (use_goto_tb(s, dest)) {
tcg_gen_goto_tb(n);
tcg_gen_movi_i32(QREG_PC, dest);
tcg_gen_exit_tb(s->base.tb, n);
} else {
gen_jmp_im(s, dest);
tcg_gen_exit_tb(NULL, 0);
}
s->base.is_jmp = DISAS_NORETURN;
}
DISAS_INSN(scc)
{
DisasCompare c;
int cond;
TCGv tmp;
cond = (insn >> 8) & 0xf;
gen_cc_cond(&c, s, cond);
tmp = tcg_temp_new();
tcg_gen_setcond_i32(c.tcond, tmp, c.v1, c.v2);
free_cond(&c);
tcg_gen_neg_i32(tmp, tmp);
DEST_EA(env, insn, OS_BYTE, tmp, NULL);
tcg_temp_free(tmp);
}
DISAS_INSN(dbcc)
{
TCGLabel *l1;
TCGv reg;
TCGv tmp;
int16_t offset;
uint32_t base;
reg = DREG(insn, 0);
base = s->pc;
offset = (int16_t)read_im16(env, s);
l1 = gen_new_label();
gen_jmpcc(s, (insn >> 8) & 0xf, l1);
tmp = tcg_temp_new();
tcg_gen_ext16s_i32(tmp, reg);
tcg_gen_addi_i32(tmp, tmp, -1);
gen_partset_reg(OS_WORD, reg, tmp);
tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, -1, l1);
gen_jmp_tb(s, 1, base + offset);
gen_set_label(l1);
gen_jmp_tb(s, 0, s->pc);
}
DISAS_INSN(undef_mac)
{
gen_exception(s, s->base.pc_next, EXCP_LINEA);
}
DISAS_INSN(undef_fpu)
{
gen_exception(s, s->base.pc_next, EXCP_LINEF);
}
DISAS_INSN(undef)
{
/*
* ??? This is both instructions that are as yet unimplemented
* for the 680x0 series, as well as those that are implemented
* but actually illegal for CPU32 or pre-68020.
*/
qemu_log_mask(LOG_UNIMP, "Illegal instruction: %04x @ %08x\n",
insn, s->base.pc_next);
gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
}
DISAS_INSN(mulw)
{
TCGv reg;
TCGv tmp;
TCGv src;
int sign;
sign = (insn & 0x100) != 0;
reg = DREG(insn, 9);
tmp = tcg_temp_new();
if (sign)
tcg_gen_ext16s_i32(tmp, reg);
else
tcg_gen_ext16u_i32(tmp, reg);
SRC_EA(env, src, OS_WORD, sign, NULL);
tcg_gen_mul_i32(tmp, tmp, src);
tcg_gen_mov_i32(reg, tmp);
gen_logic_cc(s, tmp, OS_LONG);
tcg_temp_free(tmp);
}
DISAS_INSN(divw)
{
int sign;
TCGv src;
TCGv destr;
/* divX.w <EA>,Dn 32/16 -> 16r:16q */
sign = (insn & 0x100) != 0;
/* dest.l / src.w */
SRC_EA(env, src, OS_WORD, sign, NULL);
destr = tcg_const_i32(REG(insn, 9));
if (sign) {
gen_helper_divsw(cpu_env, destr, src);
} else {
gen_helper_divuw(cpu_env, destr, src);
}
tcg_temp_free(destr);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(divl)
{
TCGv num, reg, den;
int sign;
uint16_t ext;
ext = read_im16(env, s);
sign = (ext & 0x0800) != 0;
if (ext & 0x400) {
if (!m68k_feature(s->env, M68K_FEATURE_QUAD_MULDIV)) {
gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
return;
}
/* divX.l <EA>, Dr:Dq 64/32 -> 32r:32q */
SRC_EA(env, den, OS_LONG, 0, NULL);
num = tcg_const_i32(REG(ext, 12));
reg = tcg_const_i32(REG(ext, 0));
if (sign) {
gen_helper_divsll(cpu_env, num, reg, den);
} else {
gen_helper_divull(cpu_env, num, reg, den);
}
tcg_temp_free(reg);
tcg_temp_free(num);
set_cc_op(s, CC_OP_FLAGS);
return;
}
/* divX.l <EA>, Dq 32/32 -> 32q */
/* divXl.l <EA>, Dr:Dq 32/32 -> 32r:32q */
SRC_EA(env, den, OS_LONG, 0, NULL);
num = tcg_const_i32(REG(ext, 12));
reg = tcg_const_i32(REG(ext, 0));
if (sign) {
gen_helper_divsl(cpu_env, num, reg, den);
} else {
gen_helper_divul(cpu_env, num, reg, den);
}
tcg_temp_free(reg);
tcg_temp_free(num);
set_cc_op(s, CC_OP_FLAGS);
}
static void bcd_add(TCGv dest, TCGv src)
{
TCGv t0, t1;
/*
* dest10 = dest10 + src10 + X
*
* t1 = src
* t2 = t1 + 0x066
* t3 = t2 + dest + X
* t4 = t2 ^ dest
* t5 = t3 ^ t4
* t6 = ~t5 & 0x110
* t7 = (t6 >> 2) | (t6 >> 3)
* return t3 - t7
*/
/*
* t1 = (src + 0x066) + dest + X
* = result with some possible exceeding 0x6
*/
t0 = tcg_const_i32(0x066);
tcg_gen_add_i32(t0, t0, src);
t1 = tcg_temp_new();
tcg_gen_add_i32(t1, t0, dest);
tcg_gen_add_i32(t1, t1, QREG_CC_X);
/* we will remove exceeding 0x6 where there is no carry */
/*
* t0 = (src + 0x0066) ^ dest
* = t1 without carries
*/
tcg_gen_xor_i32(t0, t0, dest);
/*
* extract the carries
* t0 = t0 ^ t1
* = only the carries
*/
tcg_gen_xor_i32(t0, t0, t1);
/*
* generate 0x1 where there is no carry
* and for each 0x10, generate a 0x6
*/
tcg_gen_shri_i32(t0, t0, 3);
tcg_gen_not_i32(t0, t0);
tcg_gen_andi_i32(t0, t0, 0x22);
tcg_gen_add_i32(dest, t0, t0);
tcg_gen_add_i32(dest, dest, t0);
tcg_temp_free(t0);
/*
* remove the exceeding 0x6
* for digits that have not generated a carry
*/
tcg_gen_sub_i32(dest, t1, dest);
tcg_temp_free(t1);
}
static void bcd_sub(TCGv dest, TCGv src)
{
TCGv t0, t1, t2;
/*
* dest10 = dest10 - src10 - X
* = bcd_add(dest + 1 - X, 0x199 - src)
*/
/* t0 = 0x066 + (0x199 - src) */
t0 = tcg_temp_new();
tcg_gen_subfi_i32(t0, 0x1ff, src);
/* t1 = t0 + dest + 1 - X*/
t1 = tcg_temp_new();
tcg_gen_add_i32(t1, t0, dest);
tcg_gen_addi_i32(t1, t1, 1);
tcg_gen_sub_i32(t1, t1, QREG_CC_X);
/* t2 = t0 ^ dest */
t2 = tcg_temp_new();
tcg_gen_xor_i32(t2, t0, dest);
/* t0 = t1 ^ t2 */
tcg_gen_xor_i32(t0, t1, t2);
/*
* t2 = ~t0 & 0x110
* t0 = (t2 >> 2) | (t2 >> 3)
*
* to fit on 8bit operands, changed in:
*
* t2 = ~(t0 >> 3) & 0x22
* t0 = t2 + t2
* t0 = t0 + t2
*/
tcg_gen_shri_i32(t2, t0, 3);
tcg_gen_not_i32(t2, t2);
tcg_gen_andi_i32(t2, t2, 0x22);
tcg_gen_add_i32(t0, t2, t2);
tcg_gen_add_i32(t0, t0, t2);
tcg_temp_free(t2);
/* return t1 - t0 */
tcg_gen_sub_i32(dest, t1, t0);
tcg_temp_free(t0);
tcg_temp_free(t1);
}
static void bcd_flags(TCGv val)
{
tcg_gen_andi_i32(QREG_CC_C, val, 0x0ff);
tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_C);
tcg_gen_extract_i32(QREG_CC_C, val, 8, 1);
tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C);
}
DISAS_INSN(abcd_reg)
{
TCGv src;
TCGv dest;
gen_flush_flags(s); /* !Z is sticky */
src = gen_extend(s, DREG(insn, 0), OS_BYTE, 0);
dest = gen_extend(s, DREG(insn, 9), OS_BYTE, 0);
bcd_add(dest, src);
gen_partset_reg(OS_BYTE, DREG(insn, 9), dest);
bcd_flags(dest);
}
DISAS_INSN(abcd_mem)
{
TCGv src, dest, addr;
gen_flush_flags(s); /* !Z is sticky */
/* Indirect pre-decrement load (mode 4) */
src = gen_ea_mode(env, s, 4, REG(insn, 0), OS_BYTE,
NULL_QREG, NULL, EA_LOADU, IS_USER(s));
dest = gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE,
NULL_QREG, &addr, EA_LOADU, IS_USER(s));
bcd_add(dest, src);
gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE, dest, &addr,
EA_STORE, IS_USER(s));
bcd_flags(dest);
}
DISAS_INSN(sbcd_reg)
{
TCGv src, dest;
gen_flush_flags(s); /* !Z is sticky */
src = gen_extend(s, DREG(insn, 0), OS_BYTE, 0);
dest = gen_extend(s, DREG(insn, 9), OS_BYTE, 0);
bcd_sub(dest, src);
gen_partset_reg(OS_BYTE, DREG(insn, 9), dest);
bcd_flags(dest);
}
DISAS_INSN(sbcd_mem)
{
TCGv src, dest, addr;
gen_flush_flags(s); /* !Z is sticky */
/* Indirect pre-decrement load (mode 4) */
src = gen_ea_mode(env, s, 4, REG(insn, 0), OS_BYTE,
NULL_QREG, NULL, EA_LOADU, IS_USER(s));
dest = gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE,
NULL_QREG, &addr, EA_LOADU, IS_USER(s));
bcd_sub(dest, src);
gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE, dest, &addr,
EA_STORE, IS_USER(s));
bcd_flags(dest);
}
DISAS_INSN(nbcd)
{
TCGv src, dest;
TCGv addr;
gen_flush_flags(s); /* !Z is sticky */
SRC_EA(env, src, OS_BYTE, 0, &addr);
dest = tcg_const_i32(0);
bcd_sub(dest, src);
DEST_EA(env, insn, OS_BYTE, dest, &addr);
bcd_flags(dest);
tcg_temp_free(dest);
}
DISAS_INSN(addsub)
{
TCGv reg;
TCGv dest;
TCGv src;
TCGv tmp;
TCGv addr;
int add;
int opsize;
add = (insn & 0x4000) != 0;
opsize = insn_opsize(insn);
reg = gen_extend(s, DREG(insn, 9), opsize, 1);
dest = tcg_temp_new();
if (insn & 0x100) {
SRC_EA(env, tmp, opsize, 1, &addr);
src = reg;
} else {
tmp = reg;
SRC_EA(env, src, opsize, 1, NULL);
}
if (add) {
tcg_gen_add_i32(dest, tmp, src);
tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, src);
set_cc_op(s, CC_OP_ADDB + opsize);
} else {
tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, tmp, src);
tcg_gen_sub_i32(dest, tmp, src);
set_cc_op(s, CC_OP_SUBB + opsize);
}
gen_update_cc_add(dest, src, opsize);
if (insn & 0x100) {
DEST_EA(env, insn, opsize, dest, &addr);
} else {
gen_partset_reg(opsize, DREG(insn, 9), dest);
}
tcg_temp_free(dest);
}
/* Reverse the order of the bits in REG. */
DISAS_INSN(bitrev)
{
TCGv reg;
reg = DREG(insn, 0);
gen_helper_bitrev(reg, reg);
}
DISAS_INSN(bitop_reg)
{
int opsize;
int op;
TCGv src1;
TCGv src2;
TCGv tmp;
TCGv addr;
TCGv dest;
if ((insn & 0x38) != 0)
opsize = OS_BYTE;
else
opsize = OS_LONG;
op = (insn >> 6) & 3;
SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
gen_flush_flags(s);
src2 = tcg_temp_new();
if (opsize == OS_BYTE)
tcg_gen_andi_i32(src2, DREG(insn, 9), 7);
else
tcg_gen_andi_i32(src2, DREG(insn, 9), 31);
tmp = tcg_const_i32(1);
tcg_gen_shl_i32(tmp, tmp, src2);
tcg_temp_free(src2);
tcg_gen_and_i32(QREG_CC_Z, src1, tmp);
dest = tcg_temp_new();
switch (op) {
case 1: /* bchg */
tcg_gen_xor_i32(dest, src1, tmp);
break;
case 2: /* bclr */
tcg_gen_andc_i32(dest, src1, tmp);
break;
case 3: /* bset */
tcg_gen_or_i32(dest, src1, tmp);
break;
default: /* btst */
break;
}
tcg_temp_free(tmp);
if (op) {
DEST_EA(env, insn, opsize, dest, &addr);
}
tcg_temp_free(dest);
}
DISAS_INSN(sats)
{
TCGv reg;
reg = DREG(insn, 0);
gen_flush_flags(s);
gen_helper_sats(reg, reg, QREG_CC_V);
gen_logic_cc(s, reg, OS_LONG);
}
static void gen_push(DisasContext *s, TCGv val)
{
TCGv tmp;
tmp = tcg_temp_new();
tcg_gen_subi_i32(tmp, QREG_SP, 4);
gen_store(s, OS_LONG, tmp, val, IS_USER(s));
tcg_gen_mov_i32(QREG_SP, tmp);
tcg_temp_free(tmp);
}
static TCGv mreg(int reg)
{
if (reg < 8) {
/* Dx */
return cpu_dregs[reg];
}
/* Ax */
return cpu_aregs[reg & 7];
}
DISAS_INSN(movem)
{
TCGv addr, incr, tmp, r[16];
int is_load = (insn & 0x0400) != 0;
int opsize = (insn & 0x40) != 0 ? OS_LONG : OS_WORD;
uint16_t mask = read_im16(env, s);
int mode = extract32(insn, 3, 3);
int reg0 = REG(insn, 0);
int i;
tmp = cpu_aregs[reg0];
switch (mode) {
case 0: /* data register direct */
case 1: /* addr register direct */
do_addr_fault:
gen_addr_fault(s);
return;
case 2: /* indirect */
break;
case 3: /* indirect post-increment */
if (!is_load) {
/* post-increment is not allowed */
goto do_addr_fault;
}
break;
case 4: /* indirect pre-decrement */
if (is_load) {
/* pre-decrement is not allowed */
goto do_addr_fault;
}
/*
* We want a bare copy of the address reg, without any pre-decrement
* adjustment, as gen_lea would provide.
*/
break;
default:
tmp = gen_lea_mode(env, s, mode, reg0, opsize);
if (IS_NULL_QREG(tmp)) {
goto do_addr_fault;
}
break;
}
addr = tcg_temp_new();
tcg_gen_mov_i32(addr, tmp);
incr = tcg_const_i32(opsize_bytes(opsize));
if (is_load) {
/* memory to register */
for (i = 0; i < 16; i++) {
if (mask & (1 << i)) {
r[i] = gen_load(s, opsize, addr, 1, IS_USER(s));
tcg_gen_add_i32(addr, addr, incr);
}
}
for (i = 0; i < 16; i++) {
if (mask & (1 << i)) {
tcg_gen_mov_i32(mreg(i), r[i]);
tcg_temp_free(r[i]);
}
}
if (mode == 3) {
/* post-increment: movem (An)+,X */
tcg_gen_mov_i32(cpu_aregs[reg0], addr);
}
} else {
/* register to memory */
if (mode == 4) {
/* pre-decrement: movem X,-(An) */
for (i = 15; i >= 0; i--) {
if ((mask << i) & 0x8000) {
tcg_gen_sub_i32(addr, addr, incr);
if (reg0 + 8 == i &&
m68k_feature(s->env, M68K_FEATURE_EXT_FULL)) {
/*
* M68020+: if the addressing register is the
* register moved to memory, the value written
* is the initial value decremented by the size of
* the operation, regardless of how many actual
* stores have been performed until this point.
* M68000/M68010: the value is the initial value.
*/
tmp = tcg_temp_new();
tcg_gen_sub_i32(tmp, cpu_aregs[reg0], incr);
gen_store(s, opsize, addr, tmp, IS_USER(s));
tcg_temp_free(tmp);
} else {
gen_store(s, opsize, addr, mreg(i), IS_USER(s));
}
}
}
tcg_gen_mov_i32(cpu_aregs[reg0], addr);
} else {
for (i = 0; i < 16; i++) {
if (mask & (1 << i)) {
gen_store(s, opsize, addr, mreg(i), IS_USER(s));
tcg_gen_add_i32(addr, addr, incr);
}
}
}
}
tcg_temp_free(incr);
tcg_temp_free(addr);
}
DISAS_INSN(movep)
{
uint8_t i;
int16_t displ;
TCGv reg;
TCGv addr;
TCGv abuf;
TCGv dbuf;
displ = read_im16(env, s);
addr = AREG(insn, 0);
reg = DREG(insn, 9);
abuf = tcg_temp_new();
tcg_gen_addi_i32(abuf, addr, displ);
dbuf = tcg_temp_new();
if (insn & 0x40) {
i = 4;
} else {
i = 2;
}
if (insn & 0x80) {
for ( ; i > 0 ; i--) {
tcg_gen_shri_i32(dbuf, reg, (i - 1) * 8);
tcg_gen_qemu_st8(dbuf, abuf, IS_USER(s));
if (i > 1) {
tcg_gen_addi_i32(abuf, abuf, 2);
}
}
} else {
for ( ; i > 0 ; i--) {
tcg_gen_qemu_ld8u(dbuf, abuf, IS_USER(s));
tcg_gen_deposit_i32(reg, reg, dbuf, (i - 1) * 8, 8);
if (i > 1) {
tcg_gen_addi_i32(abuf, abuf, 2);
}
}
}
tcg_temp_free(abuf);
tcg_temp_free(dbuf);
}
DISAS_INSN(bitop_im)
{
int opsize;
int op;
TCGv src1;
uint32_t mask;
int bitnum;
TCGv tmp;
TCGv addr;
if ((insn & 0x38) != 0)
opsize = OS_BYTE;
else
opsize = OS_LONG;
op = (insn >> 6) & 3;
bitnum = read_im16(env, s);
if (m68k_feature(s->env, M68K_FEATURE_M68000)) {
if (bitnum & 0xfe00) {
disas_undef(env, s, insn);
return;
}
} else {
if (bitnum & 0xff00) {
disas_undef(env, s, insn);
return;
}
}
SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
gen_flush_flags(s);
if (opsize == OS_BYTE)
bitnum &= 7;
else
bitnum &= 31;
mask = 1 << bitnum;
tcg_gen_andi_i32(QREG_CC_Z, src1, mask);
if (op) {
tmp = tcg_temp_new();
switch (op) {
case 1: /* bchg */
tcg_gen_xori_i32(tmp, src1, mask);
break;
case 2: /* bclr */
tcg_gen_andi_i32(tmp, src1, ~mask);
break;
case 3: /* bset */
tcg_gen_ori_i32(tmp, src1, mask);
break;
default: /* btst */
break;
}
DEST_EA(env, insn, opsize, tmp, &addr);
tcg_temp_free(tmp);
}
}
static TCGv gen_get_ccr(DisasContext *s)
{
TCGv dest;
update_cc_op(s);
dest = tcg_temp_new();
gen_helper_get_ccr(dest, cpu_env);
return dest;
}
static TCGv gen_get_sr(DisasContext *s)
{
TCGv ccr;
TCGv sr;
ccr = gen_get_ccr(s);
sr = tcg_temp_new();
tcg_gen_andi_i32(sr, QREG_SR, 0xffe0);
tcg_gen_or_i32(sr, sr, ccr);
tcg_temp_free(ccr);
return sr;
}
static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)
{
if (ccr_only) {
tcg_gen_movi_i32(QREG_CC_C, val & CCF_C ? 1 : 0);
tcg_gen_movi_i32(QREG_CC_V, val & CCF_V ? -1 : 0);
tcg_gen_movi_i32(QREG_CC_Z, val & CCF_Z ? 0 : 1);
tcg_gen_movi_i32(QREG_CC_N, val & CCF_N ? -1 : 0);
tcg_gen_movi_i32(QREG_CC_X, val & CCF_X ? 1 : 0);
} else {
TCGv sr = tcg_const_i32(val);
gen_helper_set_sr(cpu_env, sr);
tcg_temp_free(sr);
}
set_cc_op(s, CC_OP_FLAGS);
}
static void gen_set_sr(DisasContext *s, TCGv val, int ccr_only)
{
if (ccr_only) {
gen_helper_set_ccr(cpu_env, val);
} else {
gen_helper_set_sr(cpu_env, val);
}
set_cc_op(s, CC_OP_FLAGS);
}
static void gen_move_to_sr(CPUM68KState *env, DisasContext *s, uint16_t insn,
bool ccr_only)
{
if ((insn & 0x3f) == 0x3c) {
uint16_t val;
val = read_im16(env, s);
gen_set_sr_im(s, val, ccr_only);
} else {
TCGv src;
SRC_EA(env, src, OS_WORD, 0, NULL);
gen_set_sr(s, src, ccr_only);
}
}
DISAS_INSN(arith_im)
{
int op;
TCGv im;
TCGv src1;
TCGv dest;
TCGv addr;
int opsize;
bool with_SR = ((insn & 0x3f) == 0x3c);
op = (insn >> 9) & 7;
opsize = insn_opsize(insn);
switch (opsize) {
case OS_BYTE:
im = tcg_const_i32((int8_t)read_im8(env, s));
break;
case OS_WORD:
im = tcg_const_i32((int16_t)read_im16(env, s));
break;
case OS_LONG:
im = tcg_const_i32(read_im32(env, s));
break;
default:
g_assert_not_reached();
}
if (with_SR) {
/* SR/CCR can only be used with andi/eori/ori */
if (op == 2 || op == 3 || op == 6) {
disas_undef(env, s, insn);
return;
}
switch (opsize) {
case OS_BYTE:
src1 = gen_get_ccr(s);
break;
case OS_WORD:
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
src1 = gen_get_sr(s);
break;
default:
/* OS_LONG; others already g_assert_not_reached. */
disas_undef(env, s, insn);
return;
}
} else {
SRC_EA(env, src1, opsize, 1, (op == 6) ? NULL : &addr);
}
dest = tcg_temp_new();
switch (op) {
case 0: /* ori */
tcg_gen_or_i32(dest, src1, im);
if (with_SR) {
gen_set_sr(s, dest, opsize == OS_BYTE);
} else {
DEST_EA(env, insn, opsize, dest, &addr);
gen_logic_cc(s, dest, opsize);
}
break;
case 1: /* andi */
tcg_gen_and_i32(dest, src1, im);
if (with_SR) {
gen_set_sr(s, dest, opsize == OS_BYTE);
} else {
DEST_EA(env, insn, opsize, dest, &addr);
gen_logic_cc(s, dest, opsize);
}
break;
case 2: /* subi */
tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, src1, im);
tcg_gen_sub_i32(dest, src1, im);
gen_update_cc_add(dest, im, opsize);
set_cc_op(s, CC_OP_SUBB + opsize);
DEST_EA(env, insn, opsize, dest, &addr);
break;
case 3: /* addi */
tcg_gen_add_i32(dest, src1, im);
gen_update_cc_add(dest, im, opsize);
tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, im);
set_cc_op(s, CC_OP_ADDB + opsize);
DEST_EA(env, insn, opsize, dest, &addr);
break;
case 5: /* eori */
tcg_gen_xor_i32(dest, src1, im);
if (with_SR) {
gen_set_sr(s, dest, opsize == OS_BYTE);
} else {
DEST_EA(env, insn, opsize, dest, &addr);
gen_logic_cc(s, dest, opsize);
}
break;
case 6: /* cmpi */
gen_update_cc_cmp(s, src1, im, opsize);
break;
default:
abort();
}
tcg_temp_free(im);
tcg_temp_free(dest);
}
DISAS_INSN(cas)
{
int opsize;
TCGv addr;
uint16_t ext;
TCGv load;
TCGv cmp;
MemOp opc;
switch ((insn >> 9) & 3) {
case 1:
opsize = OS_BYTE;
opc = MO_SB;
break;
case 2:
opsize = OS_WORD;
opc = MO_TESW;
break;
case 3:
opsize = OS_LONG;
opc = MO_TESL;
break;
default:
g_assert_not_reached();
}
ext = read_im16(env, s);
/* cas Dc,Du,<EA> */
addr = gen_lea(env, s, insn, opsize);
if (IS_NULL_QREG(addr)) {
gen_addr_fault(s);
return;
}
cmp = gen_extend(s, DREG(ext, 0), opsize, 1);
/*
* if <EA> == Dc then
* <EA> = Du
* Dc = <EA> (because <EA> == Dc)
* else
* Dc = <EA>
*/
load = tcg_temp_new();
tcg_gen_atomic_cmpxchg_i32(load, addr, cmp, DREG(ext, 6),
IS_USER(s), opc);
/* update flags before setting cmp to load */
gen_update_cc_cmp(s, load, cmp, opsize);
gen_partset_reg(opsize, DREG(ext, 0), load);
tcg_temp_free(load);
switch (extract32(insn, 3, 3)) {
case 3: /* Indirect postincrement. */
tcg_gen_addi_i32(AREG(insn, 0), addr, opsize_bytes(opsize));
break;
case 4: /* Indirect predecrememnt. */
tcg_gen_mov_i32(AREG(insn, 0), addr);
break;
}
}
DISAS_INSN(cas2w)
{
uint16_t ext1, ext2;
TCGv addr1, addr2;
TCGv regs;
/* cas2 Dc1:Dc2,Du1:Du2,(Rn1):(Rn2) */
ext1 = read_im16(env, s);
if (ext1 & 0x8000) {
/* Address Register */
addr1 = AREG(ext1, 12);
} else {
/* Data Register */
addr1 = DREG(ext1, 12);
}
ext2 = read_im16(env, s);
if (ext2 & 0x8000) {
/* Address Register */
addr2 = AREG(ext2, 12);
} else {
/* Data Register */
addr2 = DREG(ext2, 12);
}
/*
* if (R1) == Dc1 && (R2) == Dc2 then
* (R1) = Du1
* (R2) = Du2
* else
* Dc1 = (R1)
* Dc2 = (R2)
*/
regs = tcg_const_i32(REG(ext2, 6) |
(REG(ext1, 6) << 3) |
(REG(ext2, 0) << 6) |
(REG(ext1, 0) << 9));
if (tb_cflags(s->base.tb) & CF_PARALLEL) {
gen_helper_exit_atomic(cpu_env);
} else {
gen_helper_cas2w(cpu_env, regs, addr1, addr2);
}
tcg_temp_free(regs);
/* Note that cas2w also assigned to env->cc_op. */
s->cc_op = CC_OP_CMPW;
s->cc_op_synced = 1;
}
DISAS_INSN(cas2l)
{
uint16_t ext1, ext2;
TCGv addr1, addr2, regs;
/* cas2 Dc1:Dc2,Du1:Du2,(Rn1):(Rn2) */
ext1 = read_im16(env, s);
if (ext1 & 0x8000) {
/* Address Register */
addr1 = AREG(ext1, 12);
} else {
/* Data Register */
addr1 = DREG(ext1, 12);
}
ext2 = read_im16(env, s);
if (ext2 & 0x8000) {
/* Address Register */
addr2 = AREG(ext2, 12);
} else {
/* Data Register */
addr2 = DREG(ext2, 12);
}
/*
* if (R1) == Dc1 && (R2) == Dc2 then
* (R1) = Du1
* (R2) = Du2
* else
* Dc1 = (R1)
* Dc2 = (R2)
*/
regs = tcg_const_i32(REG(ext2, 6) |
(REG(ext1, 6) << 3) |
(REG(ext2, 0) << 6) |
(REG(ext1, 0) << 9));
if (tb_cflags(s->base.tb) & CF_PARALLEL) {
gen_helper_cas2l_parallel(cpu_env, regs, addr1, addr2);
} else {
gen_helper_cas2l(cpu_env, regs, addr1, addr2);
}
tcg_temp_free(regs);
/* Note that cas2l also assigned to env->cc_op. */
s->cc_op = CC_OP_CMPL;
s->cc_op_synced = 1;
}
DISAS_INSN(byterev)
{
TCGv reg;
reg = DREG(insn, 0);
tcg_gen_bswap32_i32(reg, reg);
}
DISAS_INSN(move)
{
TCGv src;
TCGv dest;
int op;
int opsize;
switch (insn >> 12) {
case 1: /* move.b */
opsize = OS_BYTE;
break;
case 2: /* move.l */
opsize = OS_LONG;
break;
case 3: /* move.w */
opsize = OS_WORD;
break;
default:
abort();
}
SRC_EA(env, src, opsize, 1, NULL);
op = (insn >> 6) & 7;
if (op == 1) {
/* movea */
/* The value will already have been sign extended. */
dest = AREG(insn, 9);
tcg_gen_mov_i32(dest, src);
} else {
/* normal move */
uint16_t dest_ea;
dest_ea = ((insn >> 9) & 7) | (op << 3);
DEST_EA(env, dest_ea, opsize, src, NULL);
/* This will be correct because loads sign extend. */
gen_logic_cc(s, src, opsize);
}
}
DISAS_INSN(negx)
{
TCGv z;
TCGv src;
TCGv addr;
int opsize;
opsize = insn_opsize(insn);
SRC_EA(env, src, opsize, 1, &addr);
gen_flush_flags(s); /* compute old Z */
/*
* Perform subtract with borrow.
* (X, N) = -(src + X);
*/
z = tcg_const_i32(0);
tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, src, z, QREG_CC_X, z);
tcg_gen_sub2_i32(QREG_CC_N, QREG_CC_X, z, z, QREG_CC_N, QREG_CC_X);
tcg_temp_free(z);
gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
tcg_gen_andi_i32(QREG_CC_X, QREG_CC_X, 1);
/*
* Compute signed-overflow for negation. The normal formula for
* subtraction is (res ^ src) & (src ^ dest), but with dest==0
* this simplifies to res & src.
*/
tcg_gen_and_i32(QREG_CC_V, QREG_CC_N, src);
/* Copy the rest of the results into place. */
tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
set_cc_op(s, CC_OP_FLAGS);
/* result is in QREG_CC_N */
DEST_EA(env, insn, opsize, QREG_CC_N, &addr);
}
DISAS_INSN(lea)
{
TCGv reg;
TCGv tmp;
reg = AREG(insn, 9);
tmp = gen_lea(env, s, insn, OS_LONG);
if (IS_NULL_QREG(tmp)) {
gen_addr_fault(s);
return;
}
tcg_gen_mov_i32(reg, tmp);
}
DISAS_INSN(clr)
{
int opsize;
TCGv zero;
zero = tcg_const_i32(0);
opsize = insn_opsize(insn);
DEST_EA(env, insn, opsize, zero, NULL);
gen_logic_cc(s, zero, opsize);
tcg_temp_free(zero);
}
DISAS_INSN(move_from_ccr)
{
TCGv ccr;
ccr = gen_get_ccr(s);
DEST_EA(env, insn, OS_WORD, ccr, NULL);
}
DISAS_INSN(neg)
{
TCGv src1;
TCGv dest;
TCGv addr;
int opsize;
opsize = insn_opsize(insn);
SRC_EA(env, src1, opsize, 1, &addr);
dest = tcg_temp_new();
tcg_gen_neg_i32(dest, src1);
set_cc_op(s, CC_OP_SUBB + opsize);
gen_update_cc_add(dest, src1, opsize);
tcg_gen_setcondi_i32(TCG_COND_NE, QREG_CC_X, dest, 0);
DEST_EA(env, insn, opsize, dest, &addr);
tcg_temp_free(dest);
}
DISAS_INSN(move_to_ccr)
{
gen_move_to_sr(env, s, insn, true);
}
DISAS_INSN(not)
{
TCGv src1;
TCGv dest;
TCGv addr;
int opsize;
opsize = insn_opsize(insn);
SRC_EA(env, src1, opsize, 1, &addr);
dest = tcg_temp_new();
tcg_gen_not_i32(dest, src1);
DEST_EA(env, insn, opsize, dest, &addr);
gen_logic_cc(s, dest, opsize);
}
DISAS_INSN(swap)
{
TCGv src1;
TCGv src2;
TCGv reg;
src1 = tcg_temp_new();
src2 = tcg_temp_new();
reg = DREG(insn, 0);
tcg_gen_shli_i32(src1, reg, 16);
tcg_gen_shri_i32(src2, reg, 16);
tcg_gen_or_i32(reg, src1, src2);
tcg_temp_free(src2);
tcg_temp_free(src1);
gen_logic_cc(s, reg, OS_LONG);
}
DISAS_INSN(bkpt)
{
gen_exception(s, s->base.pc_next, EXCP_DEBUG);
}
DISAS_INSN(pea)
{
TCGv tmp;
tmp = gen_lea(env, s, insn, OS_LONG);
if (IS_NULL_QREG(tmp)) {
gen_addr_fault(s);
return;
}
gen_push(s, tmp);
}
DISAS_INSN(ext)
{
int op;
TCGv reg;
TCGv tmp;
reg = DREG(insn, 0);
op = (insn >> 6) & 7;
tmp = tcg_temp_new();
if (op == 3)
tcg_gen_ext16s_i32(tmp, reg);
else
tcg_gen_ext8s_i32(tmp, reg);
if (op == 2)
gen_partset_reg(OS_WORD, reg, tmp);
else
tcg_gen_mov_i32(reg, tmp);
gen_logic_cc(s, tmp, OS_LONG);
tcg_temp_free(tmp);
}
DISAS_INSN(tst)
{
int opsize;
TCGv tmp;
opsize = insn_opsize(insn);
SRC_EA(env, tmp, opsize, 1, NULL);
gen_logic_cc(s, tmp, opsize);
}
DISAS_INSN(pulse)
{
/* Implemented as a NOP. */
}
DISAS_INSN(illegal)
{
gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
}
/* ??? This should be atomic. */
DISAS_INSN(tas)
{
TCGv dest;
TCGv src1;
TCGv addr;
dest = tcg_temp_new();
SRC_EA(env, src1, OS_BYTE, 1, &addr);
gen_logic_cc(s, src1, OS_BYTE);
tcg_gen_ori_i32(dest, src1, 0x80);
DEST_EA(env, insn, OS_BYTE, dest, &addr);
tcg_temp_free(dest);
}
DISAS_INSN(mull)
{
uint16_t ext;
TCGv src1;
int sign;
ext = read_im16(env, s);
sign = ext & 0x800;
if (ext & 0x400) {
if (!m68k_feature(s->env, M68K_FEATURE_QUAD_MULDIV)) {
gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
return;
}
SRC_EA(env, src1, OS_LONG, 0, NULL);
if (sign) {
tcg_gen_muls2_i32(QREG_CC_Z, QREG_CC_N, src1, DREG(ext, 12));
} else {
tcg_gen_mulu2_i32(QREG_CC_Z, QREG_CC_N, src1, DREG(ext, 12));
}
/* if Dl == Dh, 68040 returns low word */
tcg_gen_mov_i32(DREG(ext, 0), QREG_CC_N);
tcg_gen_mov_i32(DREG(ext, 12), QREG_CC_Z);
tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N);
tcg_gen_movi_i32(QREG_CC_V, 0);
tcg_gen_movi_i32(QREG_CC_C, 0);
set_cc_op(s, CC_OP_FLAGS);
return;
}
SRC_EA(env, src1, OS_LONG, 0, NULL);
if (m68k_feature(s->env, M68K_FEATURE_M68000)) {
tcg_gen_movi_i32(QREG_CC_C, 0);
if (sign) {
tcg_gen_muls2_i32(QREG_CC_N, QREG_CC_V, src1, DREG(ext, 12));
/* QREG_CC_V is -(QREG_CC_V != (QREG_CC_N >> 31)) */
tcg_gen_sari_i32(QREG_CC_Z, QREG_CC_N, 31);
tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, QREG_CC_V, QREG_CC_Z);
} else {
tcg_gen_mulu2_i32(QREG_CC_N, QREG_CC_V, src1, DREG(ext, 12));
/* QREG_CC_V is -(QREG_CC_V != 0), use QREG_CC_C as 0 */
tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, QREG_CC_V, QREG_CC_C);
}
tcg_gen_neg_i32(QREG_CC_V, QREG_CC_V);
tcg_gen_mov_i32(DREG(ext, 12), QREG_CC_N);
tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
set_cc_op(s, CC_OP_FLAGS);
} else {
/*
* The upper 32 bits of the product are discarded, so
* muls.l and mulu.l are functionally equivalent.
*/
tcg_gen_mul_i32(DREG(ext, 12), src1, DREG(ext, 12));
gen_logic_cc(s, DREG(ext, 12), OS_LONG);
}
}
static void gen_link(DisasContext *s, uint16_t insn, int32_t offset)
{
TCGv reg;
TCGv tmp;
reg = AREG(insn, 0);
tmp = tcg_temp_new();
tcg_gen_subi_i32(tmp, QREG_SP, 4);
gen_store(s, OS_LONG, tmp, reg, IS_USER(s));
if ((insn & 7) != 7) {
tcg_gen_mov_i32(reg, tmp);
}
tcg_gen_addi_i32(QREG_SP, tmp, offset);
tcg_temp_free(tmp);
}
DISAS_INSN(link)
{
int16_t offset;
offset = read_im16(env, s);
gen_link(s, insn, offset);
}
DISAS_INSN(linkl)
{
int32_t offset;
offset = read_im32(env, s);
gen_link(s, insn, offset);
}
DISAS_INSN(unlk)
{
TCGv src;
TCGv reg;
TCGv tmp;
src = tcg_temp_new();
reg = AREG(insn, 0);
tcg_gen_mov_i32(src, reg);
tmp = gen_load(s, OS_LONG, src, 0, IS_USER(s));
tcg_gen_mov_i32(reg, tmp);
tcg_gen_addi_i32(QREG_SP, src, 4);
tcg_temp_free(src);
tcg_temp_free(tmp);
}
#if defined(CONFIG_SOFTMMU)
DISAS_INSN(reset)
{
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
gen_helper_reset(cpu_env);
}
#endif
DISAS_INSN(nop)
{
}
DISAS_INSN(rtd)
{
TCGv tmp;
int16_t offset = read_im16(env, s);
tmp = gen_load(s, OS_LONG, QREG_SP, 0, IS_USER(s));
tcg_gen_addi_i32(QREG_SP, QREG_SP, offset + 4);
gen_jmp(s, tmp);
}
DISAS_INSN(rtr)
{
TCGv tmp;
TCGv ccr;
TCGv sp;
sp = tcg_temp_new();
ccr = gen_load(s, OS_WORD, QREG_SP, 0, IS_USER(s));
tcg_gen_addi_i32(sp, QREG_SP, 2);
tmp = gen_load(s, OS_LONG, sp, 0, IS_USER(s));
tcg_gen_addi_i32(QREG_SP, sp, 4);
tcg_temp_free(sp);
gen_set_sr(s, ccr, true);
tcg_temp_free(ccr);
gen_jmp(s, tmp);
}
DISAS_INSN(rts)
{
TCGv tmp;
tmp = gen_load(s, OS_LONG, QREG_SP, 0, IS_USER(s));
tcg_gen_addi_i32(QREG_SP, QREG_SP, 4);
gen_jmp(s, tmp);
}
DISAS_INSN(jump)
{
TCGv tmp;
/*
* Load the target address first to ensure correct exception
* behavior.
*/
tmp = gen_lea(env, s, insn, OS_LONG);
if (IS_NULL_QREG(tmp)) {
gen_addr_fault(s);
return;
}
if ((insn & 0x40) == 0) {
/* jsr */
gen_push(s, tcg_const_i32(s->pc));
}
gen_jmp(s, tmp);
}
DISAS_INSN(addsubq)
{
TCGv src;
TCGv dest;
TCGv val;
int imm;
TCGv addr;
int opsize;
if ((insn & 070) == 010) {
/* Operation on address register is always long. */
opsize = OS_LONG;
} else {
opsize = insn_opsize(insn);
}
SRC_EA(env, src, opsize, 1, &addr);
imm = (insn >> 9) & 7;
if (imm == 0) {
imm = 8;
}
val = tcg_const_i32(imm);
dest = tcg_temp_new();
tcg_gen_mov_i32(dest, src);
if ((insn & 0x38) == 0x08) {
/*
* Don't update condition codes if the destination is an
* address register.
*/
if (insn & 0x0100) {
tcg_gen_sub_i32(dest, dest, val);
} else {
tcg_gen_add_i32(dest, dest, val);
}
} else {
if (insn & 0x0100) {
tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, val);
tcg_gen_sub_i32(dest, dest, val);
set_cc_op(s, CC_OP_SUBB + opsize);
} else {
tcg_gen_add_i32(dest, dest, val);
tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, val);
set_cc_op(s, CC_OP_ADDB + opsize);
}
gen_update_cc_add(dest, val, opsize);
}
tcg_temp_free(val);
DEST_EA(env, insn, opsize, dest, &addr);
tcg_temp_free(dest);
}
DISAS_INSN(tpf)
{
switch (insn & 7) {
case 2: /* One extension word. */
s->pc += 2;
break;
case 3: /* Two extension words. */
s->pc += 4;
break;
case 4: /* No extension words. */
break;
default:
disas_undef(env, s, insn);
}
}
DISAS_INSN(branch)
{
int32_t offset;
uint32_t base;
int op;
base = s->pc;
op = (insn >> 8) & 0xf;
offset = (int8_t)insn;
if (offset == 0) {
offset = (int16_t)read_im16(env, s);
} else if (offset == -1) {
offset = read_im32(env, s);
}
if (op == 1) {
/* bsr */
gen_push(s, tcg_const_i32(s->pc));
}
if (op > 1) {
/* Bcc */
TCGLabel *l1 = gen_new_label();
gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1);
gen_jmp_tb(s, 1, base + offset);
gen_set_label(l1);
gen_jmp_tb(s, 0, s->pc);
} else {
/* Unconditional branch. */
update_cc_op(s);
gen_jmp_tb(s, 0, base + offset);
}
}
DISAS_INSN(moveq)
{
tcg_gen_movi_i32(DREG(insn, 9), (int8_t)insn);
gen_logic_cc(s, DREG(insn, 9), OS_LONG);
}
DISAS_INSN(mvzs)
{
int opsize;
TCGv src;
TCGv reg;
if (insn & 0x40)
opsize = OS_WORD;
else
opsize = OS_BYTE;
SRC_EA(env, src, opsize, (insn & 0x80) == 0, NULL);
reg = DREG(insn, 9);
tcg_gen_mov_i32(reg, src);
gen_logic_cc(s, src, opsize);
}
DISAS_INSN(or)
{
TCGv reg;
TCGv dest;
TCGv src;
TCGv addr;
int opsize;
opsize = insn_opsize(insn);
reg = gen_extend(s, DREG(insn, 9), opsize, 0);
dest = tcg_temp_new();
if (insn & 0x100) {
SRC_EA(env, src, opsize, 0, &addr);
tcg_gen_or_i32(dest, src, reg);
DEST_EA(env, insn, opsize, dest, &addr);
} else {
SRC_EA(env, src, opsize, 0, NULL);
tcg_gen_or_i32(dest, src, reg);
gen_partset_reg(opsize, DREG(insn, 9), dest);
}
gen_logic_cc(s, dest, opsize);
tcg_temp_free(dest);
}
DISAS_INSN(suba)
{
TCGv src;
TCGv reg;
SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL);
reg = AREG(insn, 9);
tcg_gen_sub_i32(reg, reg, src);
}
static inline void gen_subx(DisasContext *s, TCGv src, TCGv dest, int opsize)
{
TCGv tmp;
gen_flush_flags(s); /* compute old Z */
/*
* Perform subtract with borrow.
* (X, N) = dest - (src + X);
*/
tmp = tcg_const_i32(0);
tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, src, tmp, QREG_CC_X, tmp);
tcg_gen_sub2_i32(QREG_CC_N, QREG_CC_X, dest, tmp, QREG_CC_N, QREG_CC_X);
gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
tcg_gen_andi_i32(QREG_CC_X, QREG_CC_X, 1);
/* Compute signed-overflow for subtract. */
tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, dest);
tcg_gen_xor_i32(tmp, dest, src);
tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, tmp);
tcg_temp_free(tmp);
/* Copy the rest of the results into place. */
tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
set_cc_op(s, CC_OP_FLAGS);
/* result is in QREG_CC_N */
}
DISAS_INSN(subx_reg)
{
TCGv dest;
TCGv src;
int opsize;
opsize = insn_opsize(insn);
src = gen_extend(s, DREG(insn, 0), opsize, 1);
dest = gen_extend(s, DREG(insn, 9), opsize, 1);
gen_subx(s, src, dest, opsize);
gen_partset_reg(opsize, DREG(insn, 9), QREG_CC_N);
}
DISAS_INSN(subx_mem)
{
TCGv src;
TCGv addr_src;
TCGv dest;
TCGv addr_dest;
int opsize;
opsize = insn_opsize(insn);
addr_src = AREG(insn, 0);
tcg_gen_subi_i32(addr_src, addr_src, opsize_bytes(opsize));
src = gen_load(s, opsize, addr_src, 1, IS_USER(s));
addr_dest = AREG(insn, 9);
tcg_gen_subi_i32(addr_dest, addr_dest, opsize_bytes(opsize));
dest = gen_load(s, opsize, addr_dest, 1, IS_USER(s));
gen_subx(s, src, dest, opsize);
gen_store(s, opsize, addr_dest, QREG_CC_N, IS_USER(s));
tcg_temp_free(dest);
tcg_temp_free(src);
}
DISAS_INSN(mov3q)
{
TCGv src;
int val;
val = (insn >> 9) & 7;
if (val == 0)
val = -1;
src = tcg_const_i32(val);
gen_logic_cc(s, src, OS_LONG);
DEST_EA(env, insn, OS_LONG, src, NULL);
tcg_temp_free(src);
}
DISAS_INSN(cmp)
{
TCGv src;
TCGv reg;
int opsize;
opsize = insn_opsize(insn);
SRC_EA(env, src, opsize, 1, NULL);
reg = gen_extend(s, DREG(insn, 9), opsize, 1);
gen_update_cc_cmp(s, reg, src, opsize);
}
DISAS_INSN(cmpa)
{
int opsize;
TCGv src;
TCGv reg;
if (insn & 0x100) {
opsize = OS_LONG;
} else {
opsize = OS_WORD;
}
SRC_EA(env, src, opsize, 1, NULL);
reg = AREG(insn, 9);
gen_update_cc_cmp(s, reg, src, OS_LONG);
}
DISAS_INSN(cmpm)
{
int opsize = insn_opsize(insn);
TCGv src, dst;
/* Post-increment load (mode 3) from Ay. */
src = gen_ea_mode(env, s, 3, REG(insn, 0), opsize,
NULL_QREG, NULL, EA_LOADS, IS_USER(s));
/* Post-increment load (mode 3) from Ax. */
dst = gen_ea_mode(env, s, 3, REG(insn, 9), opsize,
NULL_QREG, NULL, EA_LOADS, IS_USER(s));
gen_update_cc_cmp(s, dst, src, opsize);
}
DISAS_INSN(eor)
{
TCGv src;
TCGv dest;
TCGv addr;
int opsize;
opsize = insn_opsize(insn);
SRC_EA(env, src, opsize, 0, &addr);
dest = tcg_temp_new();
tcg_gen_xor_i32(dest, src, DREG(insn, 9));
gen_logic_cc(s, dest, opsize);
DEST_EA(env, insn, opsize, dest, &addr);
tcg_temp_free(dest);
}
static void do_exg(TCGv reg1, TCGv reg2)
{
TCGv temp = tcg_temp_new();
tcg_gen_mov_i32(temp, reg1);
tcg_gen_mov_i32(reg1, reg2);
tcg_gen_mov_i32(reg2, temp);
tcg_temp_free(temp);
}
DISAS_INSN(exg_dd)
{
/* exchange Dx and Dy */
do_exg(DREG(insn, 9), DREG(insn, 0));
}
DISAS_INSN(exg_aa)
{
/* exchange Ax and Ay */
do_exg(AREG(insn, 9), AREG(insn, 0));
}
DISAS_INSN(exg_da)
{
/* exchange Dx and Ay */
do_exg(DREG(insn, 9), AREG(insn, 0));
}
DISAS_INSN(and)
{
TCGv src;
TCGv reg;
TCGv dest;
TCGv addr;
int opsize;
dest = tcg_temp_new();
opsize = insn_opsize(insn);
reg = DREG(insn, 9);
if (insn & 0x100) {
SRC_EA(env, src, opsize, 0, &addr);
tcg_gen_and_i32(dest, src, reg);
DEST_EA(env, insn, opsize, dest, &addr);
} else {
SRC_EA(env, src, opsize, 0, NULL);
tcg_gen_and_i32(dest, src, reg);
gen_partset_reg(opsize, reg, dest);
}
gen_logic_cc(s, dest, opsize);
tcg_temp_free(dest);
}
DISAS_INSN(adda)
{
TCGv src;
TCGv reg;
SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL);
reg = AREG(insn, 9);
tcg_gen_add_i32(reg, reg, src);
}
static inline void gen_addx(DisasContext *s, TCGv src, TCGv dest, int opsize)
{
TCGv tmp;
gen_flush_flags(s); /* compute old Z */
/*
* Perform addition with carry.
* (X, N) = src + dest + X;
*/
tmp = tcg_const_i32(0);
tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, QREG_CC_X, tmp, dest, tmp);
tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, QREG_CC_N, QREG_CC_X, src, tmp);
gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
/* Compute signed-overflow for addition. */
tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, src);
tcg_gen_xor_i32(tmp, dest, src);
tcg_gen_andc_i32(QREG_CC_V, QREG_CC_V, tmp);
tcg_temp_free(tmp);
/* Copy the rest of the results into place. */
tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
set_cc_op(s, CC_OP_FLAGS);
/* result is in QREG_CC_N */
}
DISAS_INSN(addx_reg)
{
TCGv dest;
TCGv src;
int opsize;
opsize = insn_opsize(insn);
dest = gen_extend(s, DREG(insn, 9), opsize, 1);
src = gen_extend(s, DREG(insn, 0), opsize, 1);
gen_addx(s, src, dest, opsize);
gen_partset_reg(opsize, DREG(insn, 9), QREG_CC_N);
}
DISAS_INSN(addx_mem)
{
TCGv src;
TCGv addr_src;
TCGv dest;
TCGv addr_dest;
int opsize;
opsize = insn_opsize(insn);
addr_src = AREG(insn, 0);
tcg_gen_subi_i32(addr_src, addr_src, opsize_bytes(opsize));
src = gen_load(s, opsize, addr_src, 1, IS_USER(s));
addr_dest = AREG(insn, 9);
tcg_gen_subi_i32(addr_dest, addr_dest, opsize_bytes(opsize));
dest = gen_load(s, opsize, addr_dest, 1, IS_USER(s));
gen_addx(s, src, dest, opsize);
gen_store(s, opsize, addr_dest, QREG_CC_N, IS_USER(s));
tcg_temp_free(dest);
tcg_temp_free(src);
}
static inline void shift_im(DisasContext *s, uint16_t insn, int opsize)
{
int count = (insn >> 9) & 7;
int logical = insn & 8;
int left = insn & 0x100;
int bits = opsize_bytes(opsize) * 8;
TCGv reg = gen_extend(s, DREG(insn, 0), opsize, !logical);
if (count == 0) {
count = 8;
}
tcg_gen_movi_i32(QREG_CC_V, 0);
if (left) {
tcg_gen_shri_i32(QREG_CC_C, reg, bits - count);
tcg_gen_shli_i32(QREG_CC_N, reg, count);
/*
* Note that ColdFire always clears V (done above),
* while M68000 sets if the most significant bit is changed at
* any time during the shift operation.
*/
if (!logical && m68k_feature(s->env, M68K_FEATURE_M68000)) {
/* if shift count >= bits, V is (reg != 0) */
if (count >= bits) {
tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, reg, QREG_CC_V);
} else {
TCGv t0 = tcg_temp_new();
tcg_gen_sari_i32(QREG_CC_V, reg, bits - 1);
tcg_gen_sari_i32(t0, reg, bits - count - 1);
tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, QREG_CC_V, t0);
tcg_temp_free(t0);
}
tcg_gen_neg_i32(QREG_CC_V, QREG_CC_V);
}
} else {
tcg_gen_shri_i32(QREG_CC_C, reg, count - 1);
if (logical) {
tcg_gen_shri_i32(QREG_CC_N, reg, count);
} else {
tcg_gen_sari_i32(QREG_CC_N, reg, count);
}
}
gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1);
tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C);
gen_partset_reg(opsize, DREG(insn, 0), QREG_CC_N);
set_cc_op(s, CC_OP_FLAGS);
}
static inline void shift_reg(DisasContext *s, uint16_t insn, int opsize)
{
int logical = insn & 8;
int left = insn & 0x100;
int bits = opsize_bytes(opsize) * 8;
TCGv reg = gen_extend(s, DREG(insn, 0), opsize, !logical);
TCGv s32;
TCGv_i64 t64, s64;
t64 = tcg_temp_new_i64();
s64 = tcg_temp_new_i64();
s32 = tcg_temp_new();
/*
* Note that m68k truncates the shift count modulo 64, not 32.
* In addition, a 64-bit shift makes it easy to find "the last
* bit shifted out", for the carry flag.
*/
tcg_gen_andi_i32(s32, DREG(insn, 9), 63);
tcg_gen_extu_i32_i64(s64, s32);
tcg_gen_extu_i32_i64(t64, reg);
/* Optimistically set V=0. Also used as a zero source below. */
tcg_gen_movi_i32(QREG_CC_V, 0);
if (left) {
tcg_gen_shl_i64(t64, t64, s64);
if (opsize == OS_LONG) {
tcg_gen_extr_i64_i32(QREG_CC_N, QREG_CC_C, t64);
/* Note that C=0 if shift count is 0, and we get that for free. */
} else {
TCGv zero = tcg_const_i32(0);
tcg_gen_extrl_i64_i32(QREG_CC_N, t64);
tcg_gen_shri_i32(QREG_CC_C, QREG_CC_N, bits);
tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
s32, zero, zero, QREG_CC_C);
tcg_temp_free(zero);
}
tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1);
/* X = C, but only if the shift count was non-zero. */
tcg_gen_movcond_i32(TCG_COND_NE, QREG_CC_X, s32, QREG_CC_V,
QREG_CC_C, QREG_CC_X);
/*
* M68000 sets V if the most significant bit is changed at
* any time during the shift operation. Do this via creating
* an extension of the sign bit, comparing, and discarding
* the bits below the sign bit. I.e.
* int64_t s = (intN_t)reg;
* int64_t t = (int64_t)(intN_t)reg << count;
* V = ((s ^ t) & (-1 << (bits - 1))) != 0
*/
if (!logical && m68k_feature(s->env, M68K_FEATURE_M68000)) {
TCGv_i64 tt = tcg_const_i64(32);
/* if shift is greater than 32, use 32 */
tcg_gen_movcond_i64(TCG_COND_GT, s64, s64, tt, tt, s64);
tcg_temp_free_i64(tt);
/* Sign extend the input to 64 bits; re-do the shift. */
tcg_gen_ext_i32_i64(t64, reg);
tcg_gen_shl_i64(s64, t64, s64);
/* Clear all bits that are unchanged. */
tcg_gen_xor_i64(t64, t64, s64);
/* Ignore the bits below the sign bit. */
tcg_gen_andi_i64(t64, t64, -1ULL << (bits - 1));
/* If any bits remain set, we have overflow. */
tcg_gen_setcondi_i64(TCG_COND_NE, t64, t64, 0);
tcg_gen_extrl_i64_i32(QREG_CC_V, t64);
tcg_gen_neg_i32(QREG_CC_V, QREG_CC_V);
}
} else {
tcg_gen_shli_i64(t64, t64, 32);
if (logical) {
tcg_gen_shr_i64(t64, t64, s64);
} else {
tcg_gen_sar_i64(t64, t64, s64);
}
tcg_gen_extr_i64_i32(QREG_CC_C, QREG_CC_N, t64);
/* Note that C=0 if shift count is 0, and we get that for free. */
tcg_gen_shri_i32(QREG_CC_C, QREG_CC_C, 31);
/* X = C, but only if the shift count was non-zero. */
tcg_gen_movcond_i32(TCG_COND_NE, QREG_CC_X, s32, QREG_CC_V,
QREG_CC_C, QREG_CC_X);
}
gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
tcg_temp_free(s32);
tcg_temp_free_i64(s64);
tcg_temp_free_i64(t64);
/* Write back the result. */
gen_partset_reg(opsize, DREG(insn, 0), QREG_CC_N);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(shift8_im)
{
shift_im(s, insn, OS_BYTE);
}
DISAS_INSN(shift16_im)
{
shift_im(s, insn, OS_WORD);
}
DISAS_INSN(shift_im)
{
shift_im(s, insn, OS_LONG);
}
DISAS_INSN(shift8_reg)
{
shift_reg(s, insn, OS_BYTE);
}
DISAS_INSN(shift16_reg)
{
shift_reg(s, insn, OS_WORD);
}
DISAS_INSN(shift_reg)
{
shift_reg(s, insn, OS_LONG);
}
DISAS_INSN(shift_mem)
{
int logical = insn & 8;
int left = insn & 0x100;
TCGv src;
TCGv addr;
SRC_EA(env, src, OS_WORD, !logical, &addr);
tcg_gen_movi_i32(QREG_CC_V, 0);
if (left) {
tcg_gen_shri_i32(QREG_CC_C, src, 15);
tcg_gen_shli_i32(QREG_CC_N, src, 1);
/*
* Note that ColdFire always clears V,
* while M68000 sets if the most significant bit is changed at
* any time during the shift operation
*/
if (!logical && m68k_feature(s->env, M68K_FEATURE_M68000)) {
src = gen_extend(s, src, OS_WORD, 1);
tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, src);
}
} else {
tcg_gen_mov_i32(QREG_CC_C, src);
if (logical) {
tcg_gen_shri_i32(QREG_CC_N, src, 1);
} else {
tcg_gen_sari_i32(QREG_CC_N, src, 1);
}
}
gen_ext(QREG_CC_N, QREG_CC_N, OS_WORD, 1);
tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1);
tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C);
DEST_EA(env, insn, OS_WORD, QREG_CC_N, &addr);
set_cc_op(s, CC_OP_FLAGS);
}
static void rotate(TCGv reg, TCGv shift, int left, int size)
{
switch (size) {
case 8:
/* Replicate the 8-bit input so that a 32-bit rotate works. */
tcg_gen_ext8u_i32(reg, reg);
tcg_gen_muli_i32(reg, reg, 0x01010101);
goto do_long;
case 16:
/* Replicate the 16-bit input so that a 32-bit rotate works. */
tcg_gen_deposit_i32(reg, reg, reg, 16, 16);
goto do_long;
do_long:
default:
if (left) {
tcg_gen_rotl_i32(reg, reg, shift);
} else {
tcg_gen_rotr_i32(reg, reg, shift);
}
}
/* compute flags */
switch (size) {
case 8:
tcg_gen_ext8s_i32(reg, reg);
break;
case 16:
tcg_gen_ext16s_i32(reg, reg);
break;
default:
break;
}
/* QREG_CC_X is not affected */
tcg_gen_mov_i32(QREG_CC_N, reg);
tcg_gen_mov_i32(QREG_CC_Z, reg);
if (left) {
tcg_gen_andi_i32(QREG_CC_C, reg, 1);
} else {
tcg_gen_shri_i32(QREG_CC_C, reg, 31);
}
tcg_gen_movi_i32(QREG_CC_V, 0); /* always cleared */
}
static void rotate_x_flags(TCGv reg, TCGv X, int size)
{
switch (size) {
case 8:
tcg_gen_ext8s_i32(reg, reg);
break;
case 16:
tcg_gen_ext16s_i32(reg, reg);
break;
default:
break;
}
tcg_gen_mov_i32(QREG_CC_N, reg);
tcg_gen_mov_i32(QREG_CC_Z, reg);
tcg_gen_mov_i32(QREG_CC_X, X);
tcg_gen_mov_i32(QREG_CC_C, X);
tcg_gen_movi_i32(QREG_CC_V, 0);
}
/* Result of rotate_x() is valid if 0 <= shift <= size */
static TCGv rotate_x(TCGv reg, TCGv shift, int left, int size)
{
TCGv X, shl, shr, shx, sz, zero;
sz = tcg_const_i32(size);
shr = tcg_temp_new();
shl = tcg_temp_new();
shx = tcg_temp_new();
if (left) {
tcg_gen_mov_i32(shl, shift); /* shl = shift */
tcg_gen_movi_i32(shr, size + 1);
tcg_gen_sub_i32(shr, shr, shift); /* shr = size + 1 - shift */
tcg_gen_subi_i32(shx, shift, 1); /* shx = shift - 1 */
/* shx = shx < 0 ? size : shx; */
zero = tcg_const_i32(0);
tcg_gen_movcond_i32(TCG_COND_LT, shx, shx, zero, sz, shx);
tcg_temp_free(zero);
} else {
tcg_gen_mov_i32(shr, shift); /* shr = shift */
tcg_gen_movi_i32(shl, size + 1);
tcg_gen_sub_i32(shl, shl, shift); /* shl = size + 1 - shift */
tcg_gen_sub_i32(shx, sz, shift); /* shx = size - shift */
}
tcg_temp_free_i32(sz);
/* reg = (reg << shl) | (reg >> shr) | (x << shx); */
tcg_gen_shl_i32(shl, reg, shl);
tcg_gen_shr_i32(shr, reg, shr);
tcg_gen_or_i32(reg, shl, shr);
tcg_temp_free(shl);
tcg_temp_free(shr);
tcg_gen_shl_i32(shx, QREG_CC_X, shx);
tcg_gen_or_i32(reg, reg, shx);
tcg_temp_free(shx);
/* X = (reg >> size) & 1 */
X = tcg_temp_new();
tcg_gen_extract_i32(X, reg, size, 1);
return X;
}
/* Result of rotate32_x() is valid if 0 <= shift < 33 */
static TCGv rotate32_x(TCGv reg, TCGv shift, int left)
{
TCGv_i64 t0, shift64;
TCGv X, lo, hi, zero;
shift64 = tcg_temp_new_i64();
tcg_gen_extu_i32_i64(shift64, shift);
t0 = tcg_temp_new_i64();
X = tcg_temp_new();
lo = tcg_temp_new();
hi = tcg_temp_new();
if (left) {
/* create [reg:X:..] */
tcg_gen_shli_i32(lo, QREG_CC_X, 31);
tcg_gen_concat_i32_i64(t0, lo, reg);
/* rotate */
tcg_gen_rotl_i64(t0, t0, shift64);
tcg_temp_free_i64(shift64);
/* result is [reg:..:reg:X] */
tcg_gen_extr_i64_i32(lo, hi, t0);
tcg_gen_andi_i32(X, lo, 1);
tcg_gen_shri_i32(lo, lo, 1);
} else {
/* create [..:X:reg] */
tcg_gen_concat_i32_i64(t0, reg, QREG_CC_X);
tcg_gen_rotr_i64(t0, t0, shift64);
tcg_temp_free_i64(shift64);
/* result is value: [X:reg:..:reg] */
tcg_gen_extr_i64_i32(lo, hi, t0);
/* extract X */
tcg_gen_shri_i32(X, hi, 31);
/* extract result */
tcg_gen_shli_i32(hi, hi, 1);
}
tcg_temp_free_i64(t0);
tcg_gen_or_i32(lo, lo, hi);
tcg_temp_free(hi);
/* if shift == 0, register and X are not affected */
zero = tcg_const_i32(0);
tcg_gen_movcond_i32(TCG_COND_EQ, X, shift, zero, QREG_CC_X, X);
tcg_gen_movcond_i32(TCG_COND_EQ, reg, shift, zero, reg, lo);
tcg_temp_free(zero);
tcg_temp_free(lo);
return X;
}
DISAS_INSN(rotate_im)
{
TCGv shift;
int tmp;
int left = (insn & 0x100);
tmp = (insn >> 9) & 7;
if (tmp == 0) {
tmp = 8;
}
shift = tcg_const_i32(tmp);
if (insn & 8) {
rotate(DREG(insn, 0), shift, left, 32);
} else {
TCGv X = rotate32_x(DREG(insn, 0), shift, left);
rotate_x_flags(DREG(insn, 0), X, 32);
tcg_temp_free(X);
}
tcg_temp_free(shift);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(rotate8_im)
{
int left = (insn & 0x100);
TCGv reg;
TCGv shift;
int tmp;
reg = gen_extend(s, DREG(insn, 0), OS_BYTE, 0);
tmp = (insn >> 9) & 7;
if (tmp == 0) {
tmp = 8;
}
shift = tcg_const_i32(tmp);
if (insn & 8) {
rotate(reg, shift, left, 8);
} else {
TCGv X = rotate_x(reg, shift, left, 8);
rotate_x_flags(reg, X, 8);
tcg_temp_free(X);
}
tcg_temp_free(shift);
gen_partset_reg(OS_BYTE, DREG(insn, 0), reg);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(rotate16_im)
{
int left = (insn & 0x100);
TCGv reg;
TCGv shift;
int tmp;
reg = gen_extend(s, DREG(insn, 0), OS_WORD, 0);
tmp = (insn >> 9) & 7;
if (tmp == 0) {
tmp = 8;
}
shift = tcg_const_i32(tmp);
if (insn & 8) {
rotate(reg, shift, left, 16);
} else {
TCGv X = rotate_x(reg, shift, left, 16);
rotate_x_flags(reg, X, 16);
tcg_temp_free(X);
}
tcg_temp_free(shift);
gen_partset_reg(OS_WORD, DREG(insn, 0), reg);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(rotate_reg)
{
TCGv reg;
TCGv src;
TCGv t0, t1;
int left = (insn & 0x100);
reg = DREG(insn, 0);
src = DREG(insn, 9);
/* shift in [0..63] */
t0 = tcg_temp_new();
tcg_gen_andi_i32(t0, src, 63);
t1 = tcg_temp_new_i32();
if (insn & 8) {
tcg_gen_andi_i32(t1, src, 31);
rotate(reg, t1, left, 32);
/* if shift == 0, clear C */
tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
t0, QREG_CC_V /* 0 */,
QREG_CC_V /* 0 */, QREG_CC_C);
} else {
TCGv X;
/* modulo 33 */
tcg_gen_movi_i32(t1, 33);
tcg_gen_remu_i32(t1, t0, t1);
X = rotate32_x(DREG(insn, 0), t1, left);
rotate_x_flags(DREG(insn, 0), X, 32);
tcg_temp_free(X);
}
tcg_temp_free(t1);
tcg_temp_free(t0);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(rotate8_reg)
{
TCGv reg;
TCGv src;
TCGv t0, t1;
int left = (insn & 0x100);
reg = gen_extend(s, DREG(insn, 0), OS_BYTE, 0);
src = DREG(insn, 9);
/* shift in [0..63] */
t0 = tcg_temp_new_i32();
tcg_gen_andi_i32(t0, src, 63);
t1 = tcg_temp_new_i32();
if (insn & 8) {
tcg_gen_andi_i32(t1, src, 7);
rotate(reg, t1, left, 8);
/* if shift == 0, clear C */
tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
t0, QREG_CC_V /* 0 */,
QREG_CC_V /* 0 */, QREG_CC_C);
} else {
TCGv X;
/* modulo 9 */
tcg_gen_movi_i32(t1, 9);
tcg_gen_remu_i32(t1, t0, t1);
X = rotate_x(reg, t1, left, 8);
rotate_x_flags(reg, X, 8);
tcg_temp_free(X);
}
tcg_temp_free(t1);
tcg_temp_free(t0);
gen_partset_reg(OS_BYTE, DREG(insn, 0), reg);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(rotate16_reg)
{
TCGv reg;
TCGv src;
TCGv t0, t1;
int left = (insn & 0x100);
reg = gen_extend(s, DREG(insn, 0), OS_WORD, 0);
src = DREG(insn, 9);
/* shift in [0..63] */
t0 = tcg_temp_new_i32();
tcg_gen_andi_i32(t0, src, 63);
t1 = tcg_temp_new_i32();
if (insn & 8) {
tcg_gen_andi_i32(t1, src, 15);
rotate(reg, t1, left, 16);
/* if shift == 0, clear C */
tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
t0, QREG_CC_V /* 0 */,
QREG_CC_V /* 0 */, QREG_CC_C);
} else {
TCGv X;
/* modulo 17 */
tcg_gen_movi_i32(t1, 17);
tcg_gen_remu_i32(t1, t0, t1);
X = rotate_x(reg, t1, left, 16);
rotate_x_flags(reg, X, 16);
tcg_temp_free(X);
}
tcg_temp_free(t1);
tcg_temp_free(t0);
gen_partset_reg(OS_WORD, DREG(insn, 0), reg);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(rotate_mem)
{
TCGv src;
TCGv addr;
TCGv shift;
int left = (insn & 0x100);
SRC_EA(env, src, OS_WORD, 0, &addr);
shift = tcg_const_i32(1);
if (insn & 0x0200) {
rotate(src, shift, left, 16);
} else {
TCGv X = rotate_x(src, shift, left, 16);
rotate_x_flags(src, X, 16);
tcg_temp_free(X);
}
tcg_temp_free(shift);
DEST_EA(env, insn, OS_WORD, src, &addr);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(bfext_reg)
{
int ext = read_im16(env, s);
int is_sign = insn & 0x200;
TCGv src = DREG(insn, 0);
TCGv dst = DREG(ext, 12);
int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
int ofs = extract32(ext, 6, 5); /* big bit-endian */
int pos = 32 - ofs - len; /* little bit-endian */
TCGv tmp = tcg_temp_new();
TCGv shift;
/*
* In general, we're going to rotate the field so that it's at the
* top of the word and then right-shift by the complement of the
* width to extend the field.
*/
if (ext & 0x20) {
/* Variable width. */
if (ext & 0x800) {
/* Variable offset. */
tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
tcg_gen_rotl_i32(tmp, src, tmp);
} else {
tcg_gen_rotli_i32(tmp, src, ofs);
}
shift = tcg_temp_new();
tcg_gen_neg_i32(shift, DREG(ext, 0));
tcg_gen_andi_i32(shift, shift, 31);
tcg_gen_sar_i32(QREG_CC_N, tmp, shift);
if (is_sign) {
tcg_gen_mov_i32(dst, QREG_CC_N);
} else {
tcg_gen_shr_i32(dst, tmp, shift);
}
tcg_temp_free(shift);
} else {
/* Immediate width. */
if (ext & 0x800) {
/* Variable offset */
tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
tcg_gen_rotl_i32(tmp, src, tmp);
src = tmp;
pos = 32 - len;
} else {
/*
* Immediate offset. If the field doesn't wrap around the
* end of the word, rely on (s)extract completely.
*/
if (pos < 0) {
tcg_gen_rotli_i32(tmp, src, ofs);
src = tmp;
pos = 32 - len;
}
}
tcg_gen_sextract_i32(QREG_CC_N, src, pos, len);
if (is_sign) {
tcg_gen_mov_i32(dst, QREG_CC_N);
} else {
tcg_gen_extract_i32(dst, src, pos, len);
}
}
tcg_temp_free(tmp);
set_cc_op(s, CC_OP_LOGIC);
}
DISAS_INSN(bfext_mem)
{
int ext = read_im16(env, s);
int is_sign = insn & 0x200;
TCGv dest = DREG(ext, 12);
TCGv addr, len, ofs;
addr = gen_lea(env, s, insn, OS_UNSIZED);
if (IS_NULL_QREG(addr)) {
gen_addr_fault(s);
return;
}
if (ext & 0x20) {
len = DREG(ext, 0);
} else {
len = tcg_const_i32(extract32(ext, 0, 5));
}
if (ext & 0x800) {
ofs = DREG(ext, 6);
} else {
ofs = tcg_const_i32(extract32(ext, 6, 5));
}
if (is_sign) {
gen_helper_bfexts_mem(dest, cpu_env, addr, ofs, len);
tcg_gen_mov_i32(QREG_CC_N, dest);
} else {
TCGv_i64 tmp = tcg_temp_new_i64();
gen_helper_bfextu_mem(tmp, cpu_env, addr, ofs, len);
tcg_gen_extr_i64_i32(dest, QREG_CC_N, tmp);
tcg_temp_free_i64(tmp);
}
set_cc_op(s, CC_OP_LOGIC);
if (!(ext & 0x20)) {
tcg_temp_free(len);
}
if (!(ext & 0x800)) {
tcg_temp_free(ofs);
}
}
DISAS_INSN(bfop_reg)
{
int ext = read_im16(env, s);
TCGv src = DREG(insn, 0);
int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
int ofs = extract32(ext, 6, 5); /* big bit-endian */
TCGv mask, tofs, tlen;
tofs = NULL;
tlen = NULL;
if ((insn & 0x0f00) == 0x0d00) { /* bfffo */
tofs = tcg_temp_new();
tlen = tcg_temp_new();
}
if ((ext & 0x820) == 0) {
/* Immediate width and offset. */
uint32_t maski = 0x7fffffffu >> (len - 1);
if (ofs + len <= 32) {
tcg_gen_shli_i32(QREG_CC_N, src, ofs);
} else {
tcg_gen_rotli_i32(QREG_CC_N, src, ofs);
}
tcg_gen_andi_i32(QREG_CC_N, QREG_CC_N, ~maski);
mask = tcg_const_i32(ror32(maski, ofs));
if (tofs) {
tcg_gen_movi_i32(tofs, ofs);
tcg_gen_movi_i32(tlen, len);
}
} else {
TCGv tmp = tcg_temp_new();
if (ext & 0x20) {
/* Variable width */
tcg_gen_subi_i32(tmp, DREG(ext, 0), 1);
tcg_gen_andi_i32(tmp, tmp, 31);
mask = tcg_const_i32(0x7fffffffu);
tcg_gen_shr_i32(mask, mask, tmp);
if (tlen) {
tcg_gen_addi_i32(tlen, tmp, 1);
}
} else {
/* Immediate width */
mask = tcg_const_i32(0x7fffffffu >> (len - 1));
if (tlen) {
tcg_gen_movi_i32(tlen, len);
}
}
if (ext & 0x800) {
/* Variable offset */
tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
tcg_gen_rotl_i32(QREG_CC_N, src, tmp);
tcg_gen_andc_i32(QREG_CC_N, QREG_CC_N, mask);
tcg_gen_rotr_i32(mask, mask, tmp);
if (tofs) {
tcg_gen_mov_i32(tofs, tmp);
}
} else {
/* Immediate offset (and variable width) */
tcg_gen_rotli_i32(QREG_CC_N, src, ofs);
tcg_gen_andc_i32(QREG_CC_N, QREG_CC_N, mask);
tcg_gen_rotri_i32(mask, mask, ofs);
if (tofs) {
tcg_gen_movi_i32(tofs, ofs);
}
}
tcg_temp_free(tmp);
}
set_cc_op(s, CC_OP_LOGIC);
switch (insn & 0x0f00) {
case 0x0a00: /* bfchg */
tcg_gen_eqv_i32(src, src, mask);
break;
case 0x0c00: /* bfclr */
tcg_gen_and_i32(src, src, mask);
break;
case 0x0d00: /* bfffo */
gen_helper_bfffo_reg(DREG(ext, 12), QREG_CC_N, tofs, tlen);
tcg_temp_free(tlen);
tcg_temp_free(tofs);
break;
case 0x0e00: /* bfset */
tcg_gen_orc_i32(src, src, mask);
break;
case 0x0800: /* bftst */
/* flags already set; no other work to do. */
break;
default:
g_assert_not_reached();
}
tcg_temp_free(mask);
}
DISAS_INSN(bfop_mem)
{
int ext = read_im16(env, s);
TCGv addr, len, ofs;
TCGv_i64 t64;
addr = gen_lea(env, s, insn, OS_UNSIZED);
if (IS_NULL_QREG(addr)) {
gen_addr_fault(s);
return;
}
if (ext & 0x20) {
len = DREG(ext, 0);
} else {
len = tcg_const_i32(extract32(ext, 0, 5));
}
if (ext & 0x800) {
ofs = DREG(ext, 6);
} else {
ofs = tcg_const_i32(extract32(ext, 6, 5));
}
switch (insn & 0x0f00) {
case 0x0a00: /* bfchg */
gen_helper_bfchg_mem(QREG_CC_N, cpu_env, addr, ofs, len);
break;
case 0x0c00: /* bfclr */
gen_helper_bfclr_mem(QREG_CC_N, cpu_env, addr, ofs, len);
break;
case 0x0d00: /* bfffo */
t64 = tcg_temp_new_i64();
gen_helper_bfffo_mem(t64, cpu_env, addr, ofs, len);
tcg_gen_extr_i64_i32(DREG(ext, 12), QREG_CC_N, t64);
tcg_temp_free_i64(t64);
break;
case 0x0e00: /* bfset */
gen_helper_bfset_mem(QREG_CC_N, cpu_env, addr, ofs, len);
break;
case 0x0800: /* bftst */
gen_helper_bfexts_mem(QREG_CC_N, cpu_env, addr, ofs, len);
break;
default:
g_assert_not_reached();
}
set_cc_op(s, CC_OP_LOGIC);
if (!(ext & 0x20)) {
tcg_temp_free(len);
}
if (!(ext & 0x800)) {
tcg_temp_free(ofs);
}
}
DISAS_INSN(bfins_reg)
{
int ext = read_im16(env, s);
TCGv dst = DREG(insn, 0);
TCGv src = DREG(ext, 12);
int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
int ofs = extract32(ext, 6, 5); /* big bit-endian */
int pos = 32 - ofs - len; /* little bit-endian */
TCGv tmp;
tmp = tcg_temp_new();
if (ext & 0x20) {
/* Variable width */
tcg_gen_neg_i32(tmp, DREG(ext, 0));
tcg_gen_andi_i32(tmp, tmp, 31);
tcg_gen_shl_i32(QREG_CC_N, src, tmp);
} else {
/* Immediate width */
tcg_gen_shli_i32(QREG_CC_N, src, 32 - len);
}
set_cc_op(s, CC_OP_LOGIC);
/* Immediate width and offset */
if ((ext & 0x820) == 0) {
/* Check for suitability for deposit. */
if (pos >= 0) {
tcg_gen_deposit_i32(dst, dst, src, pos, len);
} else {
uint32_t maski = -2U << (len - 1);
uint32_t roti = (ofs + len) & 31;
tcg_gen_andi_i32(tmp, src, ~maski);
tcg_gen_rotri_i32(tmp, tmp, roti);
tcg_gen_andi_i32(dst, dst, ror32(maski, roti));
tcg_gen_or_i32(dst, dst, tmp);
}
} else {
TCGv mask = tcg_temp_new();
TCGv rot = tcg_temp_new();
if (ext & 0x20) {
/* Variable width */
tcg_gen_subi_i32(rot, DREG(ext, 0), 1);
tcg_gen_andi_i32(rot, rot, 31);
tcg_gen_movi_i32(mask, -2);
tcg_gen_shl_i32(mask, mask, rot);
tcg_gen_mov_i32(rot, DREG(ext, 0));
tcg_gen_andc_i32(tmp, src, mask);
} else {
/* Immediate width (variable offset) */
uint32_t maski = -2U << (len - 1);
tcg_gen_andi_i32(tmp, src, ~maski);
tcg_gen_movi_i32(mask, maski);
tcg_gen_movi_i32(rot, len & 31);
}
if (ext & 0x800) {
/* Variable offset */
tcg_gen_add_i32(rot, rot, DREG(ext, 6));
} else {
/* Immediate offset (variable width) */
tcg_gen_addi_i32(rot, rot, ofs);
}
tcg_gen_andi_i32(rot, rot, 31);
tcg_gen_rotr_i32(mask, mask, rot);
tcg_gen_rotr_i32(tmp, tmp, rot);
tcg_gen_and_i32(dst, dst, mask);
tcg_gen_or_i32(dst, dst, tmp);
tcg_temp_free(rot);
tcg_temp_free(mask);
}
tcg_temp_free(tmp);
}
DISAS_INSN(bfins_mem)
{
int ext = read_im16(env, s);
TCGv src = DREG(ext, 12);
TCGv addr, len, ofs;
addr = gen_lea(env, s, insn, OS_UNSIZED);
if (IS_NULL_QREG(addr)) {
gen_addr_fault(s);
return;
}
if (ext & 0x20) {
len = DREG(ext, 0);
} else {
len = tcg_const_i32(extract32(ext, 0, 5));
}
if (ext & 0x800) {
ofs = DREG(ext, 6);
} else {
ofs = tcg_const_i32(extract32(ext, 6, 5));
}
gen_helper_bfins_mem(QREG_CC_N, cpu_env, addr, src, ofs, len);
set_cc_op(s, CC_OP_LOGIC);
if (!(ext & 0x20)) {
tcg_temp_free(len);
}
if (!(ext & 0x800)) {
tcg_temp_free(ofs);
}
}
DISAS_INSN(ff1)
{
TCGv reg;
reg = DREG(insn, 0);
gen_logic_cc(s, reg, OS_LONG);
gen_helper_ff1(reg, reg);
}
DISAS_INSN(chk)
{
TCGv src, reg;
int opsize;
switch ((insn >> 7) & 3) {
case 3:
opsize = OS_WORD;
break;
case 2:
if (m68k_feature(env, M68K_FEATURE_CHK2)) {
opsize = OS_LONG;
break;
}
/* fallthru */
default:
gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
return;
}
SRC_EA(env, src, opsize, 1, NULL);
reg = gen_extend(s, DREG(insn, 9), opsize, 1);
gen_flush_flags(s);
gen_helper_chk(cpu_env, reg, src);
}
DISAS_INSN(chk2)
{
uint16_t ext;
TCGv addr1, addr2, bound1, bound2, reg;
int opsize;
switch ((insn >> 9) & 3) {
case 0:
opsize = OS_BYTE;
break;
case 1:
opsize = OS_WORD;
break;
case 2:
opsize = OS_LONG;
break;
default:
gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
return;
}
ext = read_im16(env, s);
if ((ext & 0x0800) == 0) {
gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
return;
}
addr1 = gen_lea(env, s, insn, OS_UNSIZED);
addr2 = tcg_temp_new();
tcg_gen_addi_i32(addr2, addr1, opsize_bytes(opsize));
bound1 = gen_load(s, opsize, addr1, 1, IS_USER(s));
tcg_temp_free(addr1);
bound2 = gen_load(s, opsize, addr2, 1, IS_USER(s));
tcg_temp_free(addr2);
reg = tcg_temp_new();
if (ext & 0x8000) {
tcg_gen_mov_i32(reg, AREG(ext, 12));
} else {
gen_ext(reg, DREG(ext, 12), opsize, 1);
}
gen_flush_flags(s);
gen_helper_chk2(cpu_env, reg, bound1, bound2);
tcg_temp_free(reg);
tcg_temp_free(bound1);
tcg_temp_free(bound2);
}
static void m68k_copy_line(TCGv dst, TCGv src, int index)
{
TCGv addr;
TCGv_i64 t0, t1;
addr = tcg_temp_new();
t0 = tcg_temp_new_i64();
t1 = tcg_temp_new_i64();
tcg_gen_andi_i32(addr, src, ~15);
tcg_gen_qemu_ld64(t0, addr, index);
tcg_gen_addi_i32(addr, addr, 8);
tcg_gen_qemu_ld64(t1, addr, index);
tcg_gen_andi_i32(addr, dst, ~15);
tcg_gen_qemu_st64(t0, addr, index);
tcg_gen_addi_i32(addr, addr, 8);
tcg_gen_qemu_st64(t1, addr, index);
tcg_temp_free_i64(t0);
tcg_temp_free_i64(t1);
tcg_temp_free(addr);
}
DISAS_INSN(move16_reg)
{
int index = IS_USER(s);
TCGv tmp;
uint16_t ext;
ext = read_im16(env, s);
if ((ext & (1 << 15)) == 0) {
gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
}
m68k_copy_line(AREG(ext, 12), AREG(insn, 0), index);
/* Ax can be Ay, so save Ay before incrementing Ax */
tmp = tcg_temp_new();
tcg_gen_mov_i32(tmp, AREG(ext, 12));
tcg_gen_addi_i32(AREG(insn, 0), AREG(insn, 0), 16);
tcg_gen_addi_i32(AREG(ext, 12), tmp, 16);
tcg_temp_free(tmp);
}
DISAS_INSN(move16_mem)
{
int index = IS_USER(s);
TCGv reg, addr;
reg = AREG(insn, 0);
addr = tcg_const_i32(read_im32(env, s));
if ((insn >> 3) & 1) {
/* MOVE16 (xxx).L, (Ay) */
m68k_copy_line(reg, addr, index);
} else {
/* MOVE16 (Ay), (xxx).L */
m68k_copy_line(addr, reg, index);
}
tcg_temp_free(addr);
if (((insn >> 3) & 2) == 0) {
/* (Ay)+ */
tcg_gen_addi_i32(reg, reg, 16);
}
}
DISAS_INSN(strldsr)
{
uint16_t ext;
uint32_t addr;
addr = s->pc - 2;
ext = read_im16(env, s);
if (ext != 0x46FC) {
gen_exception(s, addr, EXCP_ILLEGAL);
return;
}
ext = read_im16(env, s);
if (IS_USER(s) || (ext & SR_S) == 0) {
gen_exception(s, addr, EXCP_PRIVILEGE);
return;
}
gen_push(s, gen_get_sr(s));
gen_set_sr_im(s, ext, 0);
}
DISAS_INSN(move_from_sr)
{
TCGv sr;
if (IS_USER(s) && !m68k_feature(env, M68K_FEATURE_M68000)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
sr = gen_get_sr(s);
DEST_EA(env, insn, OS_WORD, sr, NULL);
}
#if defined(CONFIG_SOFTMMU)
DISAS_INSN(moves)
{
int opsize;
uint16_t ext;
TCGv reg;
TCGv addr;
int extend;
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
ext = read_im16(env, s);
opsize = insn_opsize(insn);
if (ext & 0x8000) {
/* address register */
reg = AREG(ext, 12);
extend = 1;
} else {
/* data register */
reg = DREG(ext, 12);
extend = 0;
}
addr = gen_lea(env, s, insn, opsize);
if (IS_NULL_QREG(addr)) {
gen_addr_fault(s);
return;
}
if (ext & 0x0800) {
/* from reg to ea */
gen_store(s, opsize, addr, reg, DFC_INDEX(s));
} else {
/* from ea to reg */
TCGv tmp = gen_load(s, opsize, addr, 0, SFC_INDEX(s));
if (extend) {
gen_ext(reg, tmp, opsize, 1);
} else {
gen_partset_reg(opsize, reg, tmp);
}
tcg_temp_free(tmp);
}
switch (extract32(insn, 3, 3)) {
case 3: /* Indirect postincrement. */
tcg_gen_addi_i32(AREG(insn, 0), addr,
REG(insn, 0) == 7 && opsize == OS_BYTE
? 2
: opsize_bytes(opsize));
break;
case 4: /* Indirect predecrememnt. */
tcg_gen_mov_i32(AREG(insn, 0), addr);
break;
}
}
DISAS_INSN(move_to_sr)
{
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
gen_move_to_sr(env, s, insn, false);
gen_exit_tb(s);
}
DISAS_INSN(move_from_usp)
{
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
tcg_gen_ld_i32(AREG(insn, 0), cpu_env,
offsetof(CPUM68KState, sp[M68K_USP]));
}
DISAS_INSN(move_to_usp)
{
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
tcg_gen_st_i32(AREG(insn, 0), cpu_env,
offsetof(CPUM68KState, sp[M68K_USP]));
}
DISAS_INSN(halt)
{
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
gen_exception(s, s->pc, EXCP_HALT_INSN);
}
DISAS_INSN(stop)
{
uint16_t ext;
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
ext = read_im16(env, s);
gen_set_sr_im(s, ext, 0);
tcg_gen_movi_i32(cpu_halted, 1);
gen_exception(s, s->pc, EXCP_HLT);
}
DISAS_INSN(rte)
{
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
gen_exception(s, s->base.pc_next, EXCP_RTE);
}
DISAS_INSN(cf_movec)
{
uint16_t ext;
TCGv reg;
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
ext = read_im16(env, s);
if (ext & 0x8000) {
reg = AREG(ext, 12);
} else {
reg = DREG(ext, 12);
}
gen_helper_cf_movec_to(cpu_env, tcg_const_i32(ext & 0xfff), reg);
gen_exit_tb(s);
}
DISAS_INSN(m68k_movec)
{
uint16_t ext;
TCGv reg;
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
ext = read_im16(env, s);
if (ext & 0x8000) {
reg = AREG(ext, 12);
} else {
reg = DREG(ext, 12);
}
if (insn & 1) {
gen_helper_m68k_movec_to(cpu_env, tcg_const_i32(ext & 0xfff), reg);
} else {
gen_helper_m68k_movec_from(reg, cpu_env, tcg_const_i32(ext & 0xfff));
}
gen_exit_tb(s);
}
DISAS_INSN(intouch)
{
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
/* ICache fetch. Implement as no-op. */
}
DISAS_INSN(cpushl)
{
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
/* Cache push/invalidate. Implement as no-op. */
}
DISAS_INSN(cpush)
{
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
/* Cache push/invalidate. Implement as no-op. */
}
DISAS_INSN(cinv)
{
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
/* Invalidate cache line. Implement as no-op. */
}
#if defined(CONFIG_SOFTMMU)
DISAS_INSN(pflush)
{
TCGv opmode;
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
opmode = tcg_const_i32((insn >> 3) & 3);
gen_helper_pflush(cpu_env, AREG(insn, 0), opmode);
tcg_temp_free(opmode);
}
DISAS_INSN(ptest)
{
TCGv is_read;
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
is_read = tcg_const_i32((insn >> 5) & 1);
gen_helper_ptest(cpu_env, AREG(insn, 0), is_read);
tcg_temp_free(is_read);
}
#endif
DISAS_INSN(wddata)
{
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
}
DISAS_INSN(wdebug)
{
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
/* TODO: Implement wdebug. */
cpu_abort(env_cpu(env), "WDEBUG not implemented");
}
#endif
DISAS_INSN(trap)
{
gen_exception(s, s->base.pc_next, EXCP_TRAP0 + (insn & 0xf));
}
static void gen_load_fcr(DisasContext *s, TCGv res, int reg)
{
switch (reg) {
case M68K_FPIAR:
tcg_gen_movi_i32(res, 0);
break;
case M68K_FPSR:
tcg_gen_ld_i32(res, cpu_env, offsetof(CPUM68KState, fpsr));
break;
case M68K_FPCR:
tcg_gen_ld_i32(res, cpu_env, offsetof(CPUM68KState, fpcr));
break;
}
}
static void gen_store_fcr(DisasContext *s, TCGv val, int reg)
{
switch (reg) {
case M68K_FPIAR:
break;
case M68K_FPSR:
tcg_gen_st_i32(val, cpu_env, offsetof(CPUM68KState, fpsr));
break;
case M68K_FPCR:
gen_helper_set_fpcr(cpu_env, val);
break;
}
}
static void gen_qemu_store_fcr(DisasContext *s, TCGv addr, int reg)
{
int index = IS_USER(s);
TCGv tmp;
tmp = tcg_temp_new();
gen_load_fcr(s, tmp, reg);
tcg_gen_qemu_st32(tmp, addr, index);
tcg_temp_free(tmp);
}
static void gen_qemu_load_fcr(DisasContext *s, TCGv addr, int reg)
{
int index = IS_USER(s);
TCGv tmp;
tmp = tcg_temp_new();
tcg_gen_qemu_ld32u(tmp, addr, index);
gen_store_fcr(s, tmp, reg);
tcg_temp_free(tmp);
}
static void gen_op_fmove_fcr(CPUM68KState *env, DisasContext *s,
uint32_t insn, uint32_t ext)
{
int mask = (ext >> 10) & 7;
int is_write = (ext >> 13) & 1;
int mode = extract32(insn, 3, 3);
int i;
TCGv addr, tmp;
switch (mode) {
case 0: /* Dn */
if (mask != M68K_FPIAR && mask != M68K_FPSR && mask != M68K_FPCR) {
gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
return;
}
if (is_write) {
gen_load_fcr(s, DREG(insn, 0), mask);
} else {
gen_store_fcr(s, DREG(insn, 0), mask);
}
return;
case 1: /* An, only with FPIAR */
if (mask != M68K_FPIAR) {
gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
return;
}
if (is_write) {
gen_load_fcr(s, AREG(insn, 0), mask);
} else {
gen_store_fcr(s, AREG(insn, 0), mask);
}
return;
case 7: /* Immediate */
if (REG(insn, 0) == 4) {
if (is_write ||
(mask != M68K_FPIAR && mask != M68K_FPSR &&
mask != M68K_FPCR)) {
gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
return;
}
tmp = tcg_const_i32(read_im32(env, s));
gen_store_fcr(s, tmp, mask);
tcg_temp_free(tmp);
return;
}
break;
default:
break;
}
tmp = gen_lea(env, s, insn, OS_LONG);
if (IS_NULL_QREG(tmp)) {
gen_addr_fault(s);
return;
}
addr = tcg_temp_new();
tcg_gen_mov_i32(addr, tmp);
/*
* mask:
*
* 0b100 Floating-Point Control Register
* 0b010 Floating-Point Status Register
* 0b001 Floating-Point Instruction Address Register
*
*/
if (is_write && mode == 4) {
for (i = 2; i >= 0; i--, mask >>= 1) {
if (mask & 1) {
gen_qemu_store_fcr(s, addr, 1 << i);
if (mask != 1) {
tcg_gen_subi_i32(addr, addr, opsize_bytes(OS_LONG));
}
}
}
tcg_gen_mov_i32(AREG(insn, 0), addr);
} else {
for (i = 0; i < 3; i++, mask >>= 1) {
if (mask & 1) {
if (is_write) {
gen_qemu_store_fcr(s, addr, 1 << i);
} else {
gen_qemu_load_fcr(s, addr, 1 << i);
}
if (mask != 1 || mode == 3) {
tcg_gen_addi_i32(addr, addr, opsize_bytes(OS_LONG));
}
}
}
if (mode == 3) {
tcg_gen_mov_i32(AREG(insn, 0), addr);
}
}
tcg_temp_free_i32(addr);
}
static void gen_op_fmovem(CPUM68KState *env, DisasContext *s,
uint32_t insn, uint32_t ext)
{
int opsize;
TCGv addr, tmp;
int mode = (ext >> 11) & 0x3;
int is_load = ((ext & 0x2000) == 0);
if (m68k_feature(s->env, M68K_FEATURE_FPU)) {
opsize = OS_EXTENDED;
} else {
opsize = OS_DOUBLE; /* FIXME */
}
addr = gen_lea(env, s, insn, opsize);
if (IS_NULL_QREG(addr)) {
gen_addr_fault(s);
return;
}
tmp = tcg_temp_new();
if (mode & 0x1) {
/* Dynamic register list */
tcg_gen_ext8u_i32(tmp, DREG(ext, 4));
} else {
/* Static register list */
tcg_gen_movi_i32(tmp, ext & 0xff);
}
if (!is_load && (mode & 2) == 0) {
/*
* predecrement addressing mode
* only available to store register to memory
*/
if (opsize == OS_EXTENDED) {
gen_helper_fmovemx_st_predec(tmp, cpu_env, addr, tmp);
} else {
gen_helper_fmovemd_st_predec(tmp, cpu_env, addr, tmp);
}
} else {
/* postincrement addressing mode */
if (opsize == OS_EXTENDED) {
if (is_load) {
gen_helper_fmovemx_ld_postinc(tmp, cpu_env, addr, tmp);
} else {
gen_helper_fmovemx_st_postinc(tmp, cpu_env, addr, tmp);
}
} else {
if (is_load) {
gen_helper_fmovemd_ld_postinc(tmp, cpu_env, addr, tmp);
} else {
gen_helper_fmovemd_st_postinc(tmp, cpu_env, addr, tmp);
}
}
}
if ((insn & 070) == 030 || (insn & 070) == 040) {
tcg_gen_mov_i32(AREG(insn, 0), tmp);
}
tcg_temp_free(tmp);
}
/*
* ??? FP exceptions are not implemented. Most exceptions are deferred until
* immediately before the next FP instruction is executed.
*/
DISAS_INSN(fpu)
{
uint16_t ext;
int opmode;
int opsize;
TCGv_ptr cpu_src, cpu_dest;
ext = read_im16(env, s);
opmode = ext & 0x7f;
switch ((ext >> 13) & 7) {
case 0:
break;
case 1:
goto undef;
case 2:
if (insn == 0xf200 && (ext & 0xfc00) == 0x5c00) {
/* fmovecr */
TCGv rom_offset = tcg_const_i32(opmode);
cpu_dest = gen_fp_ptr(REG(ext, 7));
gen_helper_fconst(cpu_env, cpu_dest, rom_offset);
tcg_temp_free_ptr(cpu_dest);
tcg_temp_free(rom_offset);
return;
}
break;
case 3: /* fmove out */
cpu_src = gen_fp_ptr(REG(ext, 7));
opsize = ext_opsize(ext, 10);
if (gen_ea_fp(env, s, insn, opsize, cpu_src,
EA_STORE, IS_USER(s)) == -1) {
gen_addr_fault(s);
}
gen_helper_ftst(cpu_env, cpu_src);
tcg_temp_free_ptr(cpu_src);
return;
case 4: /* fmove to control register. */
case 5: /* fmove from control register. */
gen_op_fmove_fcr(env, s, insn, ext);
return;
case 6: /* fmovem */
case 7:
if ((ext & 0x1000) == 0 && !m68k_feature(s->env, M68K_FEATURE_FPU)) {
goto undef;
}
gen_op_fmovem(env, s, insn, ext);
return;
}
if (ext & (1 << 14)) {
/* Source effective address. */
opsize = ext_opsize(ext, 10);
cpu_src = gen_fp_result_ptr();
if (gen_ea_fp(env, s, insn, opsize, cpu_src,
EA_LOADS, IS_USER(s)) == -1) {
gen_addr_fault(s);
return;
}
} else {
/* Source register. */
opsize = OS_EXTENDED;
cpu_src = gen_fp_ptr(REG(ext, 10));
}
cpu_dest = gen_fp_ptr(REG(ext, 7));
switch (opmode) {
case 0: /* fmove */
gen_fp_move(cpu_dest, cpu_src);
break;
case 0x40: /* fsmove */
gen_helper_fsround(cpu_env, cpu_dest, cpu_src);
break;
case 0x44: /* fdmove */
gen_helper_fdround(cpu_env, cpu_dest, cpu_src);
break;
case 1: /* fint */
gen_helper_firound(cpu_env, cpu_dest, cpu_src);
break;
case 2: /* fsinh */
gen_helper_fsinh(cpu_env, cpu_dest, cpu_src);
break;
case 3: /* fintrz */
gen_helper_fitrunc(cpu_env, cpu_dest, cpu_src);
break;
case 4: /* fsqrt */
gen_helper_fsqrt(cpu_env, cpu_dest, cpu_src);
break;
case 0x41: /* fssqrt */
gen_helper_fssqrt(cpu_env, cpu_dest, cpu_src);
break;
case 0x45: /* fdsqrt */
gen_helper_fdsqrt(cpu_env, cpu_dest, cpu_src);
break;
case 0x06: /* flognp1 */
gen_helper_flognp1(cpu_env, cpu_dest, cpu_src);
break;
case 0x08: /* fetoxm1 */
gen_helper_fetoxm1(cpu_env, cpu_dest, cpu_src);
break;
case 0x09: /* ftanh */
gen_helper_ftanh(cpu_env, cpu_dest, cpu_src);
break;
case 0x0a: /* fatan */
gen_helper_fatan(cpu_env, cpu_dest, cpu_src);
break;
case 0x0c: /* fasin */
gen_helper_fasin(cpu_env, cpu_dest, cpu_src);
break;
case 0x0d: /* fatanh */
gen_helper_fatanh(cpu_env, cpu_dest, cpu_src);
break;
case 0x0e: /* fsin */
gen_helper_fsin(cpu_env, cpu_dest, cpu_src);
break;
case 0x0f: /* ftan */
gen_helper_ftan(cpu_env, cpu_dest, cpu_src);
break;
case 0x10: /* fetox */
gen_helper_fetox(cpu_env, cpu_dest, cpu_src);
break;
case 0x11: /* ftwotox */
gen_helper_ftwotox(cpu_env, cpu_dest, cpu_src);
break;
case 0x12: /* ftentox */
gen_helper_ftentox(cpu_env, cpu_dest, cpu_src);
break;
case 0x14: /* flogn */
gen_helper_flogn(cpu_env, cpu_dest, cpu_src);
break;
case 0x15: /* flog10 */
gen_helper_flog10(cpu_env, cpu_dest, cpu_src);
break;
case 0x16: /* flog2 */
gen_helper_flog2(cpu_env, cpu_dest, cpu_src);
break;
case 0x18: /* fabs */
gen_helper_fabs(cpu_env, cpu_dest, cpu_src);
break;
case 0x58: /* fsabs */
gen_helper_fsabs(cpu_env, cpu_dest, cpu_src);
break;
case 0x5c: /* fdabs */
gen_helper_fdabs(cpu_env, cpu_dest, cpu_src);
break;
case 0x19: /* fcosh */
gen_helper_fcosh(cpu_env, cpu_dest, cpu_src);
break;
case 0x1a: /* fneg */
gen_helper_fneg(cpu_env, cpu_dest, cpu_src);
break;
case 0x5a: /* fsneg */
gen_helper_fsneg(cpu_env, cpu_dest, cpu_src);
break;
case 0x5e: /* fdneg */
gen_helper_fdneg(cpu_env, cpu_dest, cpu_src);
break;
case 0x1c: /* facos */
gen_helper_facos(cpu_env, cpu_dest, cpu_src);
break;
case 0x1d: /* fcos */
gen_helper_fcos(cpu_env, cpu_dest, cpu_src);
break;
case 0x1e: /* fgetexp */
gen_helper_fgetexp(cpu_env, cpu_dest, cpu_src);
break;
case 0x1f: /* fgetman */
gen_helper_fgetman(cpu_env, cpu_dest, cpu_src);
break;
case 0x20: /* fdiv */
gen_helper_fdiv(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x60: /* fsdiv */
gen_helper_fsdiv(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x64: /* fddiv */
gen_helper_fddiv(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x21: /* fmod */
gen_helper_fmod(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x22: /* fadd */
gen_helper_fadd(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x62: /* fsadd */
gen_helper_fsadd(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x66: /* fdadd */
gen_helper_fdadd(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x23: /* fmul */
gen_helper_fmul(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x63: /* fsmul */
gen_helper_fsmul(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x67: /* fdmul */
gen_helper_fdmul(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x24: /* fsgldiv */
gen_helper_fsgldiv(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x25: /* frem */
gen_helper_frem(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x26: /* fscale */
gen_helper_fscale(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x27: /* fsglmul */
gen_helper_fsglmul(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x28: /* fsub */
gen_helper_fsub(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x68: /* fssub */
gen_helper_fssub(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x6c: /* fdsub */
gen_helper_fdsub(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x30: case 0x31: case 0x32:
case 0x33: case 0x34: case 0x35:
case 0x36: case 0x37: {
TCGv_ptr cpu_dest2 = gen_fp_ptr(REG(ext, 0));
gen_helper_fsincos(cpu_env, cpu_dest, cpu_dest2, cpu_src);
tcg_temp_free_ptr(cpu_dest2);
}
break;
case 0x38: /* fcmp */
gen_helper_fcmp(cpu_env, cpu_src, cpu_dest);
return;
case 0x3a: /* ftst */
gen_helper_ftst(cpu_env, cpu_src);
return;
default:
goto undef;
}
tcg_temp_free_ptr(cpu_src);
gen_helper_ftst(cpu_env, cpu_dest);
tcg_temp_free_ptr(cpu_dest);
return;
undef:
/* FIXME: Is this right for offset addressing modes? */
s->pc -= 2;
disas_undef_fpu(env, s, insn);
}
static void gen_fcc_cond(DisasCompare *c, DisasContext *s, int cond)
{
TCGv fpsr;
c->g1 = 1;
c->v2 = tcg_const_i32(0);
c->g2 = 0;
/* TODO: Raise BSUN exception. */
fpsr = tcg_temp_new();
gen_load_fcr(s, fpsr, M68K_FPSR);
switch (cond) {
case 0: /* False */
case 16: /* Signaling False */
c->v1 = c->v2;
c->tcond = TCG_COND_NEVER;
break;
case 1: /* EQual Z */
case 17: /* Signaling EQual Z */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z);
c->tcond = TCG_COND_NE;
break;
case 2: /* Ordered Greater Than !(A || Z || N) */
case 18: /* Greater Than !(A || Z || N) */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr,
FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N);
c->tcond = TCG_COND_EQ;
break;
case 3: /* Ordered Greater than or Equal Z || !(A || N) */
case 19: /* Greater than or Equal Z || !(A || N) */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A);
tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_A));
tcg_gen_andi_i32(fpsr, fpsr, FPSR_CC_Z | FPSR_CC_N);
tcg_gen_or_i32(c->v1, c->v1, fpsr);
tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N);
c->tcond = TCG_COND_NE;
break;
case 4: /* Ordered Less Than !(!N || A || Z); */
case 20: /* Less Than !(!N || A || Z); */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_xori_i32(c->v1, fpsr, FPSR_CC_N);
tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_N | FPSR_CC_A | FPSR_CC_Z);
c->tcond = TCG_COND_EQ;
break;
case 5: /* Ordered Less than or Equal Z || (N && !A) */
case 21: /* Less than or Equal Z || (N && !A) */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A);
tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_A));
tcg_gen_andc_i32(c->v1, fpsr, c->v1);
tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_Z | FPSR_CC_N);
c->tcond = TCG_COND_NE;
break;
case 6: /* Ordered Greater or Less than !(A || Z) */
case 22: /* Greater or Less than !(A || Z) */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z);
c->tcond = TCG_COND_EQ;
break;
case 7: /* Ordered !A */
case 23: /* Greater, Less or Equal !A */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A);
c->tcond = TCG_COND_EQ;
break;
case 8: /* Unordered A */
case 24: /* Not Greater, Less or Equal A */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A);
c->tcond = TCG_COND_NE;
break;
case 9: /* Unordered or Equal A || Z */
case 25: /* Not Greater or Less then A || Z */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z);
c->tcond = TCG_COND_NE;
break;
case 10: /* Unordered or Greater Than A || !(N || Z)) */
case 26: /* Not Less or Equal A || !(N || Z)) */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z);
tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_Z));
tcg_gen_andi_i32(fpsr, fpsr, FPSR_CC_A | FPSR_CC_N);
tcg_gen_or_i32(c->v1, c->v1, fpsr);
tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N);
c->tcond = TCG_COND_NE;
break;
case 11: /* Unordered or Greater or Equal A || Z || !N */
case 27: /* Not Less Than A || Z || !N */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N);
tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N);
c->tcond = TCG_COND_NE;
break;
case 12: /* Unordered or Less Than A || (N && !Z) */
case 28: /* Not Greater than or Equal A || (N && !Z) */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z);
tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_Z));
tcg_gen_andc_i32(c->v1, fpsr, c->v1);
tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_A | FPSR_CC_N);
c->tcond = TCG_COND_NE;
break;
case 13: /* Unordered or Less or Equal A || Z || N */
case 29: /* Not Greater Than A || Z || N */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N);
c->tcond = TCG_COND_NE;
break;
case 14: /* Not Equal !Z */
case 30: /* Signaling Not Equal !Z */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z);
c->tcond = TCG_COND_EQ;
break;
case 15: /* True */
case 31: /* Signaling True */
c->v1 = c->v2;
c->tcond = TCG_COND_ALWAYS;
break;
}
tcg_temp_free(fpsr);
}
static void gen_fjmpcc(DisasContext *s, int cond, TCGLabel *l1)
{
DisasCompare c;
gen_fcc_cond(&c, s, cond);
update_cc_op(s);
tcg_gen_brcond_i32(c.tcond, c.v1, c.v2, l1);
free_cond(&c);
}
DISAS_INSN(fbcc)
{
uint32_t offset;
uint32_t base;
TCGLabel *l1;
base = s->pc;
offset = (int16_t)read_im16(env, s);
if (insn & (1 << 6)) {
offset = (offset << 16) | read_im16(env, s);
}
l1 = gen_new_label();
update_cc_op(s);
gen_fjmpcc(s, insn & 0x3f, l1);
gen_jmp_tb(s, 0, s->pc);
gen_set_label(l1);
gen_jmp_tb(s, 1, base + offset);
}
DISAS_INSN(fscc)
{
DisasCompare c;
int cond;
TCGv tmp;
uint16_t ext;
ext = read_im16(env, s);
cond = ext & 0x3f;
gen_fcc_cond(&c, s, cond);
tmp = tcg_temp_new();
tcg_gen_setcond_i32(c.tcond, tmp, c.v1, c.v2);
free_cond(&c);
tcg_gen_neg_i32(tmp, tmp);
DEST_EA(env, insn, OS_BYTE, tmp, NULL);
tcg_temp_free(tmp);
}
#if defined(CONFIG_SOFTMMU)
DISAS_INSN(frestore)
{
TCGv addr;
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
if (m68k_feature(s->env, M68K_FEATURE_M68040)) {
SRC_EA(env, addr, OS_LONG, 0, NULL);
/* FIXME: check the state frame */
} else {
disas_undef(env, s, insn);
}
}
DISAS_INSN(fsave)
{
if (IS_USER(s)) {
gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
return;
}
if (m68k_feature(s->env, M68K_FEATURE_M68040)) {
/* always write IDLE */
TCGv idle = tcg_const_i32(0x41000000);
DEST_EA(env, insn, OS_LONG, idle, NULL);
tcg_temp_free(idle);
} else {
disas_undef(env, s, insn);
}
}
#endif
static inline TCGv gen_mac_extract_word(DisasContext *s, TCGv val, int upper)
{
TCGv tmp = tcg_temp_new();
if (s->env->macsr & MACSR_FI) {
if (upper)
tcg_gen_andi_i32(tmp, val, 0xffff0000);
else
tcg_gen_shli_i32(tmp, val, 16);
} else if (s->env->macsr & MACSR_SU) {
if (upper)
tcg_gen_sari_i32(tmp, val, 16);
else
tcg_gen_ext16s_i32(tmp, val);
} else {
if (upper)
tcg_gen_shri_i32(tmp, val, 16);
else
tcg_gen_ext16u_i32(tmp, val);
}
return tmp;
}
static void gen_mac_clear_flags(void)
{
tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR,
~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV));
}
DISAS_INSN(mac)
{
TCGv rx;
TCGv ry;
uint16_t ext;
int acc;
TCGv tmp;
TCGv addr;
TCGv loadval;
int dual;
TCGv saved_flags;
if (!s->done_mac) {
s->mactmp = tcg_temp_new_i64();
s->done_mac = 1;
}
ext = read_im16(env, s);
acc = ((insn >> 7) & 1) | ((ext >> 3) & 2);
dual = ((insn & 0x30) != 0 && (ext & 3) != 0);
if (dual && !m68k_feature(s->env, M68K_FEATURE_CF_EMAC_B)) {
disas_undef(env, s, insn);
return;
}
if (insn & 0x30) {
/* MAC with load. */
tmp = gen_lea(env, s, insn, OS_LONG);
addr = tcg_temp_new();
tcg_gen_and_i32(addr, tmp, QREG_MAC_MASK);
/*
* Load the value now to ensure correct exception behavior.
* Perform writeback after reading the MAC inputs.
*/
loadval = gen_load(s, OS_LONG, addr, 0, IS_USER(s));
acc ^= 1;
rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12);
ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0);
} else {
loadval = addr = NULL_QREG;
rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
}
gen_mac_clear_flags();
#if 0
l1 = -1;
/* Disabled because conditional branches clobber temporary vars. */
if ((s->env->macsr & MACSR_OMC) != 0 && !dual) {
/* Skip the multiply if we know we will ignore it. */
l1 = gen_new_label();
tmp = tcg_temp_new();
tcg_gen_andi_i32(tmp, QREG_MACSR, 1 << (acc + 8));
gen_op_jmp_nz32(tmp, l1);
}
#endif
if ((ext & 0x0800) == 0) {
/* Word. */
rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0);
ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0);
}
if (s->env->macsr & MACSR_FI) {
gen_helper_macmulf(s->mactmp, cpu_env, rx, ry);
} else {
if (s->env->macsr & MACSR_SU)
gen_helper_macmuls(s->mactmp, cpu_env, rx, ry);
else
gen_helper_macmulu(s->mactmp, cpu_env, rx, ry);
switch ((ext >> 9) & 3) {
case 1:
tcg_gen_shli_i64(s->mactmp, s->mactmp, 1);
break;
case 3:
tcg_gen_shri_i64(s->mactmp, s->mactmp, 1);
break;
}
}
if (dual) {
/* Save the overflow flag from the multiply. */
saved_flags = tcg_temp_new();
tcg_gen_mov_i32(saved_flags, QREG_MACSR);
} else {
saved_flags = NULL_QREG;
}
#if 0
/* Disabled because conditional branches clobber temporary vars. */
if ((s->env->macsr & MACSR_OMC) != 0 && dual) {
/* Skip the accumulate if the value is already saturated. */
l1 = gen_new_label();
tmp = tcg_temp_new();
gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
gen_op_jmp_nz32(tmp, l1);
}
#endif
if (insn & 0x100)
tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
else
tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
if (s->env->macsr & MACSR_FI)
gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
else if (s->env->macsr & MACSR_SU)
gen_helper_macsats(cpu_env, tcg_const_i32(acc));
else
gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
#if 0
/* Disabled because conditional branches clobber temporary vars. */
if (l1 != -1)
gen_set_label(l1);
#endif
if (dual) {
/* Dual accumulate variant. */
acc = (ext >> 2) & 3;
/* Restore the overflow flag from the multiplier. */
tcg_gen_mov_i32(QREG_MACSR, saved_flags);
#if 0
/* Disabled because conditional branches clobber temporary vars. */
if ((s->env->macsr & MACSR_OMC) != 0) {
/* Skip the accumulate if the value is already saturated. */
l1 = gen_new_label();
tmp = tcg_temp_new();
gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
gen_op_jmp_nz32(tmp, l1);
}
#endif
if (ext & 2)
tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
else
tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
if (s->env->macsr & MACSR_FI)
gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
else if (s->env->macsr & MACSR_SU)
gen_helper_macsats(cpu_env, tcg_const_i32(acc));
else
gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
#if 0
/* Disabled because conditional branches clobber temporary vars. */
if (l1 != -1)
gen_set_label(l1);
#endif
}
gen_helper_mac_set_flags(cpu_env, tcg_const_i32(acc));
if (insn & 0x30) {
TCGv rw;
rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
tcg_gen_mov_i32(rw, loadval);
/*
* FIXME: Should address writeback happen with the masked or
* unmasked value?
*/
switch ((insn >> 3) & 7) {
case 3: /* Post-increment. */
tcg_gen_addi_i32(AREG(insn, 0), addr, 4);
break;
case 4: /* Pre-decrement. */
tcg_gen_mov_i32(AREG(insn, 0), addr);
}
tcg_temp_free(loadval);
}
}
DISAS_INSN(from_mac)
{
TCGv rx;
TCGv_i64 acc;
int accnum;
rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
accnum = (insn >> 9) & 3;
acc = MACREG(accnum);
if (s->env->macsr & MACSR_FI) {
gen_helper_get_macf(rx, cpu_env, acc);
} else if ((s->env->macsr & MACSR_OMC) == 0) {
tcg_gen_extrl_i64_i32(rx, acc);
} else if (s->env->macsr & MACSR_SU) {
gen_helper_get_macs(rx, acc);
} else {
gen_helper_get_macu(rx, acc);
}
if (insn & 0x40) {
tcg_gen_movi_i64(acc, 0);
tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
}
}
DISAS_INSN(move_mac)
{
/* FIXME: This can be done without a helper. */
int src;
TCGv dest;
src = insn & 3;
dest = tcg_const_i32((insn >> 9) & 3);
gen_helper_mac_move(cpu_env, dest, tcg_const_i32(src));
gen_mac_clear_flags();
gen_helper_mac_set_flags(cpu_env, dest);
}
DISAS_INSN(from_macsr)
{
TCGv reg;
reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
tcg_gen_mov_i32(reg, QREG_MACSR);
}
DISAS_INSN(from_mask)
{
TCGv reg;
reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
tcg_gen_mov_i32(reg, QREG_MAC_MASK);
}
DISAS_INSN(from_mext)
{
TCGv reg;
TCGv acc;
reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
if (s->env->macsr & MACSR_FI)
gen_helper_get_mac_extf(reg, cpu_env, acc);
else
gen_helper_get_mac_exti(reg, cpu_env, acc);
}
DISAS_INSN(macsr_to_ccr)
{
TCGv tmp = tcg_temp_new();
tcg_gen_andi_i32(tmp, QREG_MACSR, 0xf);
gen_helper_set_sr(cpu_env, tmp);
tcg_temp_free(tmp);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(to_mac)
{
TCGv_i64 acc;
TCGv val;
int accnum;
accnum = (insn >> 9) & 3;
acc = MACREG(accnum);
SRC_EA(env, val, OS_LONG, 0, NULL);
if (s->env->macsr & MACSR_FI) {
tcg_gen_ext_i32_i64(acc, val);
tcg_gen_shli_i64(acc, acc, 8);
} else if (s->env->macsr & MACSR_SU) {
tcg_gen_ext_i32_i64(acc, val);
} else {
tcg_gen_extu_i32_i64(acc, val);
}
tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
gen_mac_clear_flags();
gen_helper_mac_set_flags(cpu_env, tcg_const_i32(accnum));
}
DISAS_INSN(to_macsr)
{
TCGv val;
SRC_EA(env, val, OS_LONG, 0, NULL);
gen_helper_set_macsr(cpu_env, val);
gen_exit_tb(s);
}
DISAS_INSN(to_mask)
{
TCGv val;
SRC_EA(env, val, OS_LONG, 0, NULL);
tcg_gen_ori_i32(QREG_MAC_MASK, val, 0xffff0000);
}
DISAS_INSN(to_mext)
{
TCGv val;
TCGv acc;
SRC_EA(env, val, OS_LONG, 0, NULL);
acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
if (s->env->macsr & MACSR_FI)
gen_helper_set_mac_extf(cpu_env, val, acc);
else if (s->env->macsr & MACSR_SU)
gen_helper_set_mac_exts(cpu_env, val, acc);
else
gen_helper_set_mac_extu(cpu_env, val, acc);
}
static disas_proc opcode_table[65536];
static void
register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask)
{
int i;
int from;
int to;
/* Sanity check. All set bits must be included in the mask. */
if (opcode & ~mask) {
fprintf(stderr,
"qemu internal error: bogus opcode definition %04x/%04x\n",
opcode, mask);
abort();
}
/*
* This could probably be cleverer. For now just optimize the case where
* the top bits are known.
*/
/* Find the first zero bit in the mask. */
i = 0x8000;
while ((i & mask) != 0)
i >>= 1;
/* Iterate over all combinations of this and lower bits. */
if (i == 0)
i = 1;
else
i <<= 1;
from = opcode & ~(i - 1);
to = from + i;
for (i = from; i < to; i++) {
if ((i & mask) == opcode)
opcode_table[i] = proc;
}
}
/*
* Register m68k opcode handlers. Order is important.
* Later insn override earlier ones.
*/
void register_m68k_insns (CPUM68KState *env)
{
/*
* Build the opcode table only once to avoid
* multithreading issues.
*/
if (opcode_table[0] != NULL) {
return;
}
/*
* use BASE() for instruction available
* for CF_ISA_A and M68000.
*/
#define BASE(name, opcode, mask) \
register_opcode(disas_##name, 0x##opcode, 0x##mask)
#define INSN(name, opcode, mask, feature) do { \
if (m68k_feature(env, M68K_FEATURE_##feature)) \
BASE(name, opcode, mask); \
} while(0)
BASE(undef, 0000, 0000);
INSN(arith_im, 0080, fff8, CF_ISA_A);
INSN(arith_im, 0000, ff00, M68000);
INSN(chk2, 00c0, f9c0, CHK2);
INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC);
BASE(bitop_reg, 0100, f1c0);
BASE(bitop_reg, 0140, f1c0);
BASE(bitop_reg, 0180, f1c0);
BASE(bitop_reg, 01c0, f1c0);
INSN(movep, 0108, f138, MOVEP);
INSN(arith_im, 0280, fff8, CF_ISA_A);
INSN(arith_im, 0200, ff00, M68000);
INSN(undef, 02c0, ffc0, M68000);
INSN(byterev, 02c0, fff8, CF_ISA_APLUSC);
INSN(arith_im, 0480, fff8, CF_ISA_A);
INSN(arith_im, 0400, ff00, M68000);
INSN(undef, 04c0, ffc0, M68000);
INSN(arith_im, 0600, ff00, M68000);
INSN(undef, 06c0, ffc0, M68000);
INSN(ff1, 04c0, fff8, CF_ISA_APLUSC);
INSN(arith_im, 0680, fff8, CF_ISA_A);
INSN(arith_im, 0c00, ff38, CF_ISA_A);
INSN(arith_im, 0c00, ff00, M68000);
BASE(bitop_im, 0800, ffc0);
BASE(bitop_im, 0840, ffc0);
BASE(bitop_im, 0880, ffc0);
BASE(bitop_im, 08c0, ffc0);
INSN(arith_im, 0a80, fff8, CF_ISA_A);
INSN(arith_im, 0a00, ff00, M68000);
#if defined(CONFIG_SOFTMMU)
INSN(moves, 0e00, ff00, M68000);
#endif
INSN(cas, 0ac0, ffc0, CAS);
INSN(cas, 0cc0, ffc0, CAS);
INSN(cas, 0ec0, ffc0, CAS);
INSN(cas2w, 0cfc, ffff, CAS);
INSN(cas2l, 0efc, ffff, CAS);
BASE(move, 1000, f000);
BASE(move, 2000, f000);
BASE(move, 3000, f000);
INSN(chk, 4000, f040, M68000);
INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC);
INSN(negx, 4080, fff8, CF_ISA_A);
INSN(negx, 4000, ff00, M68000);
INSN(undef, 40c0, ffc0, M68000);
INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
INSN(move_from_sr, 40c0, ffc0, M68000);
BASE(lea, 41c0, f1c0);
BASE(clr, 4200, ff00);
BASE(undef, 42c0, ffc0);
INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
INSN(move_from_ccr, 42c0, ffc0, M68000);
INSN(neg, 4480, fff8, CF_ISA_A);
INSN(neg, 4400, ff00, M68000);
INSN(undef, 44c0, ffc0, M68000);
BASE(move_to_ccr, 44c0, ffc0);
INSN(not, 4680, fff8, CF_ISA_A);
INSN(not, 4600, ff00, M68000);
#if defined(CONFIG_SOFTMMU)
BASE(move_to_sr, 46c0, ffc0);
#endif
INSN(nbcd, 4800, ffc0, M68000);
INSN(linkl, 4808, fff8, M68000);
BASE(pea, 4840, ffc0);
BASE(swap, 4840, fff8);
INSN(bkpt, 4848, fff8, BKPT);
INSN(movem, 48d0, fbf8, CF_ISA_A);
INSN(movem, 48e8, fbf8, CF_ISA_A);
INSN(movem, 4880, fb80, M68000);
BASE(ext, 4880, fff8);
BASE(ext, 48c0, fff8);
BASE(ext, 49c0, fff8);
BASE(tst, 4a00, ff00);
INSN(tas, 4ac0, ffc0, CF_ISA_B);
INSN(tas, 4ac0, ffc0, M68000);
#if defined(CONFIG_SOFTMMU)
INSN(halt, 4ac8, ffff, CF_ISA_A);
#endif
INSN(pulse, 4acc, ffff, CF_ISA_A);
BASE(illegal, 4afc, ffff);
INSN(mull, 4c00, ffc0, CF_ISA_A);
INSN(mull, 4c00, ffc0, LONG_MULDIV);
INSN(divl, 4c40, ffc0, CF_ISA_A);
INSN(divl, 4c40, ffc0, LONG_MULDIV);
INSN(sats, 4c80, fff8, CF_ISA_B);
BASE(trap, 4e40, fff0);
BASE(link, 4e50, fff8);
BASE(unlk, 4e58, fff8);
#if defined(CONFIG_SOFTMMU)
INSN(move_to_usp, 4e60, fff8, USP);
INSN(move_from_usp, 4e68, fff8, USP);
INSN(reset, 4e70, ffff, M68000);
BASE(stop, 4e72, ffff);
BASE(rte, 4e73, ffff);
INSN(cf_movec, 4e7b, ffff, CF_ISA_A);
INSN(m68k_movec, 4e7a, fffe, MOVEC);
#endif
BASE(nop, 4e71, ffff);
INSN(rtd, 4e74, ffff, RTD);
BASE(rts, 4e75, ffff);
INSN(rtr, 4e77, ffff, M68000);
BASE(jump, 4e80, ffc0);
BASE(jump, 4ec0, ffc0);
INSN(addsubq, 5000, f080, M68000);
BASE(addsubq, 5080, f0c0);
INSN(scc, 50c0, f0f8, CF_ISA_A); /* Scc.B Dx */
INSN(scc, 50c0, f0c0, M68000); /* Scc.B <EA> */
INSN(dbcc, 50c8, f0f8, M68000);
INSN(tpf, 51f8, fff8, CF_ISA_A);
/* Branch instructions. */
BASE(branch, 6000, f000);
/* Disable long branch instructions, then add back the ones we want. */
BASE(undef, 60ff, f0ff); /* All long branches. */
INSN(branch, 60ff, f0ff, CF_ISA_B);
INSN(undef, 60ff, ffff, CF_ISA_B); /* bra.l */
INSN(branch, 60ff, ffff, BRAL);
INSN(branch, 60ff, f0ff, BCCL);
BASE(moveq, 7000, f100);
INSN(mvzs, 7100, f100, CF_ISA_B);
BASE(or, 8000, f000);
BASE(divw, 80c0, f0c0);
INSN(sbcd_reg, 8100, f1f8, M68000);
INSN(sbcd_mem, 8108, f1f8, M68000);
BASE(addsub, 9000, f000);
INSN(undef, 90c0, f0c0, CF_ISA_A);
INSN(subx_reg, 9180, f1f8, CF_ISA_A);
INSN(subx_reg, 9100, f138, M68000);
INSN(subx_mem, 9108, f138, M68000);
INSN(suba, 91c0, f1c0, CF_ISA_A);
INSN(suba, 90c0, f0c0, M68000);
BASE(undef_mac, a000, f000);
INSN(mac, a000, f100, CF_EMAC);
INSN(from_mac, a180, f9b0, CF_EMAC);
INSN(move_mac, a110, f9fc, CF_EMAC);
INSN(from_macsr,a980, f9f0, CF_EMAC);
INSN(from_mask, ad80, fff0, CF_EMAC);
INSN(from_mext, ab80, fbf0, CF_EMAC);
INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC);
INSN(to_mac, a100, f9c0, CF_EMAC);
INSN(to_macsr, a900, ffc0, CF_EMAC);
INSN(to_mext, ab00, fbc0, CF_EMAC);
INSN(to_mask, ad00, ffc0, CF_EMAC);
INSN(mov3q, a140, f1c0, CF_ISA_B);
INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */
INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */
INSN(cmp, b080, f1c0, CF_ISA_A);
INSN(cmpa, b1c0, f1c0, CF_ISA_A);
INSN(cmp, b000, f100, M68000);
INSN(eor, b100, f100, M68000);
INSN(cmpm, b108, f138, M68000);
INSN(cmpa, b0c0, f0c0, M68000);
INSN(eor, b180, f1c0, CF_ISA_A);
BASE(and, c000, f000);
INSN(exg_dd, c140, f1f8, M68000);
INSN(exg_aa, c148, f1f8, M68000);
INSN(exg_da, c188, f1f8, M68000);
BASE(mulw, c0c0, f0c0);
INSN(abcd_reg, c100, f1f8, M68000);
INSN(abcd_mem, c108, f1f8, M68000);
BASE(addsub, d000, f000);
INSN(undef, d0c0, f0c0, CF_ISA_A);
INSN(addx_reg, d180, f1f8, CF_ISA_A);
INSN(addx_reg, d100, f138, M68000);
INSN(addx_mem, d108, f138, M68000);
INSN(adda, d1c0, f1c0, CF_ISA_A);
INSN(adda, d0c0, f0c0, M68000);
INSN(shift_im, e080, f0f0, CF_ISA_A);
INSN(shift_reg, e0a0, f0f0, CF_ISA_A);
INSN(shift8_im, e000, f0f0, M68000);
INSN(shift16_im, e040, f0f0, M68000);
INSN(shift_im, e080, f0f0, M68000);
INSN(shift8_reg, e020, f0f0, M68000);
INSN(shift16_reg, e060, f0f0, M68000);
INSN(shift_reg, e0a0, f0f0, M68000);
INSN(shift_mem, e0c0, fcc0, M68000);
INSN(rotate_im, e090, f0f0, M68000);
INSN(rotate8_im, e010, f0f0, M68000);
INSN(rotate16_im, e050, f0f0, M68000);
INSN(rotate_reg, e0b0, f0f0, M68000);
INSN(rotate8_reg, e030, f0f0, M68000);
INSN(rotate16_reg, e070, f0f0, M68000);
INSN(rotate_mem, e4c0, fcc0, M68000);
INSN(bfext_mem, e9c0, fdc0, BITFIELD); /* bfextu & bfexts */
INSN(bfext_reg, e9c0, fdf8, BITFIELD);
INSN(bfins_mem, efc0, ffc0, BITFIELD);
INSN(bfins_reg, efc0, fff8, BITFIELD);
INSN(bfop_mem, eac0, ffc0, BITFIELD); /* bfchg */
INSN(bfop_reg, eac0, fff8, BITFIELD); /* bfchg */
INSN(bfop_mem, ecc0, ffc0, BITFIELD); /* bfclr */
INSN(bfop_reg, ecc0, fff8, BITFIELD); /* bfclr */
INSN(bfop_mem, edc0, ffc0, BITFIELD); /* bfffo */
INSN(bfop_reg, edc0, fff8, BITFIELD); /* bfffo */
INSN(bfop_mem, eec0, ffc0, BITFIELD); /* bfset */
INSN(bfop_reg, eec0, fff8, BITFIELD); /* bfset */
INSN(bfop_mem, e8c0, ffc0, BITFIELD); /* bftst */
INSN(bfop_reg, e8c0, fff8, BITFIELD); /* bftst */
BASE(undef_fpu, f000, f000);
INSN(fpu, f200, ffc0, CF_FPU);
INSN(fbcc, f280, ffc0, CF_FPU);
INSN(fpu, f200, ffc0, FPU);
INSN(fscc, f240, ffc0, FPU);
INSN(fbcc, f280, ff80, FPU);
#if defined(CONFIG_SOFTMMU)
INSN(frestore, f340, ffc0, CF_FPU);
INSN(fsave, f300, ffc0, CF_FPU);
INSN(frestore, f340, ffc0, FPU);
INSN(fsave, f300, ffc0, FPU);
INSN(intouch, f340, ffc0, CF_ISA_A);
INSN(cpushl, f428, ff38, CF_ISA_A);
INSN(cpush, f420, ff20, M68040);
INSN(cinv, f400, ff20, M68040);
INSN(pflush, f500, ffe0, M68040);
INSN(ptest, f548, ffd8, M68040);
INSN(wddata, fb00, ff00, CF_ISA_A);
INSN(wdebug, fbc0, ffc0, CF_ISA_A);
#endif
INSN(move16_mem, f600, ffe0, M68040);
INSN(move16_reg, f620, fff8, M68040);
#undef INSN
}
static void m68k_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cpu)
{
DisasContext *dc = container_of(dcbase, DisasContext, base);
CPUM68KState *env = cpu->env_ptr;
dc->env = env;
dc->pc = dc->base.pc_first;
dc->cc_op = CC_OP_DYNAMIC;
dc->cc_op_synced = 1;
dc->done_mac = 0;
dc->writeback_mask = 0;
init_release_array(dc);
dc->ss_active = (M68K_SR_TRACE(env->sr) == M68K_SR_TRACE_ANY_INS);
/* If architectural single step active, limit to 1 */
if (is_singlestepping(dc)) {
dc->base.max_insns = 1;
}
}
static void m68k_tr_tb_start(DisasContextBase *dcbase, CPUState *cpu)
{
}
static void m68k_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu)
{
DisasContext *dc = container_of(dcbase, DisasContext, base);
tcg_gen_insn_start(dc->base.pc_next, dc->cc_op);
}
static bool m68k_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cpu,
const CPUBreakpoint *bp)
{
DisasContext *dc = container_of(dcbase, DisasContext, base);
gen_exception(dc, dc->base.pc_next, EXCP_DEBUG);
/*
* The address covered by the breakpoint must be included in
* [tb->pc, tb->pc + tb->size) in order to for it to be
* properly cleared -- thus we increment the PC here so that
* the logic setting tb->size below does the right thing.
*/
dc->base.pc_next += 2;
return true;
}
static void m68k_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu)
{
DisasContext *dc = container_of(dcbase, DisasContext, base);
CPUM68KState *env = cpu->env_ptr;
uint16_t insn = read_im16(env, dc);
opcode_table[insn](env, dc, insn);
do_writebacks(dc);
do_release(dc);
dc->base.pc_next = dc->pc;
if (dc->base.is_jmp == DISAS_NEXT) {
/*
* Stop translation when the next insn might touch a new page.
* This ensures that prefetch aborts at the right place.
*
* We cannot determine the size of the next insn without
* completely decoding it. However, the maximum insn size
* is 32 bytes, so end if we do not have that much remaining.
* This may produce several small TBs at the end of each page,
* but they will all be linked with goto_tb.
*
* ??? ColdFire maximum is 4 bytes; MC68000's maximum is also
* smaller than MC68020's.
*/
target_ulong start_page_offset
= dc->pc - (dc->base.pc_first & TARGET_PAGE_MASK);
if (start_page_offset >= TARGET_PAGE_SIZE - 32) {
dc->base.is_jmp = DISAS_TOO_MANY;
}
}
}
static void m68k_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu)
{
DisasContext *dc = container_of(dcbase, DisasContext, base);
switch (dc->base.is_jmp) {
case DISAS_NORETURN:
break;
case DISAS_TOO_MANY:
update_cc_op(dc);
if (is_singlestepping(dc)) {
tcg_gen_movi_i32(QREG_PC, dc->pc);
gen_singlestep_exception(dc);
} else {
gen_jmp_tb(dc, 0, dc->pc);
}
break;
case DISAS_JUMP:
/* We updated CC_OP and PC in gen_jmp/gen_jmp_im. */
if (is_singlestepping(dc)) {
gen_singlestep_exception(dc);
} else {
tcg_gen_lookup_and_goto_ptr();
}
break;
case DISAS_EXIT:
/*
* We updated CC_OP and PC in gen_exit_tb, but also modified
* other state that may require returning to the main loop.
*/
if (is_singlestepping(dc)) {
gen_singlestep_exception(dc);
} else {
tcg_gen_exit_tb(NULL, 0);
}
break;
default:
g_assert_not_reached();
}
}
static void m68k_tr_disas_log(const DisasContextBase *dcbase, CPUState *cpu)
{
qemu_log("IN: %s\n", lookup_symbol(dcbase->pc_first));
log_target_disas(cpu, dcbase->pc_first, dcbase->tb->size);
}
static const TranslatorOps m68k_tr_ops = {
.init_disas_context = m68k_tr_init_disas_context,
.tb_start = m68k_tr_tb_start,
.insn_start = m68k_tr_insn_start,
.breakpoint_check = m68k_tr_breakpoint_check,
.translate_insn = m68k_tr_translate_insn,
.tb_stop = m68k_tr_tb_stop,
.disas_log = m68k_tr_disas_log,
};
void gen_intermediate_code(CPUState *cpu, TranslationBlock *tb, int max_insns)
{
DisasContext dc;
translator_loop(&m68k_tr_ops, &dc.base, cpu, tb, max_insns);
}
static double floatx80_to_double(CPUM68KState *env, uint16_t high, uint64_t low)
{
floatx80 a = { .high = high, .low = low };
union {
float64 f64;
double d;
} u;
u.f64 = floatx80_to_float64(a, &env->fp_status);
return u.d;
}
void m68k_cpu_dump_state(CPUState *cs, FILE *f, int flags)
{
M68kCPU *cpu = M68K_CPU(cs);
CPUM68KState *env = &cpu->env;
int i;
uint16_t sr;
for (i = 0; i < 8; i++) {
qemu_fprintf(f, "D%d = %08x A%d = %08x "
"F%d = %04x %016"PRIx64" (%12g)\n",
i, env->dregs[i], i, env->aregs[i],
i, env->fregs[i].l.upper, env->fregs[i].l.lower,
floatx80_to_double(env, env->fregs[i].l.upper,
env->fregs[i].l.lower));
}
qemu_fprintf(f, "PC = %08x ", env->pc);
sr = env->sr | cpu_m68k_get_ccr(env);
qemu_fprintf(f, "SR = %04x T:%x I:%x %c%c %c%c%c%c%c\n",
sr, (sr & SR_T) >> SR_T_SHIFT, (sr & SR_I) >> SR_I_SHIFT,
(sr & SR_S) ? 'S' : 'U', (sr & SR_M) ? '%' : 'I',
(sr & CCF_X) ? 'X' : '-', (sr & CCF_N) ? 'N' : '-',
(sr & CCF_Z) ? 'Z' : '-', (sr & CCF_V) ? 'V' : '-',
(sr & CCF_C) ? 'C' : '-');
qemu_fprintf(f, "FPSR = %08x %c%c%c%c ", env->fpsr,
(env->fpsr & FPSR_CC_A) ? 'A' : '-',
(env->fpsr & FPSR_CC_I) ? 'I' : '-',
(env->fpsr & FPSR_CC_Z) ? 'Z' : '-',
(env->fpsr & FPSR_CC_N) ? 'N' : '-');
qemu_fprintf(f, "\n "
"FPCR = %04x ", env->fpcr);
switch (env->fpcr & FPCR_PREC_MASK) {
case FPCR_PREC_X:
qemu_fprintf(f, "X ");
break;
case FPCR_PREC_S:
qemu_fprintf(f, "S ");
break;
case FPCR_PREC_D:
qemu_fprintf(f, "D ");
break;
}
switch (env->fpcr & FPCR_RND_MASK) {
case FPCR_RND_N:
qemu_fprintf(f, "RN ");
break;
case FPCR_RND_Z:
qemu_fprintf(f, "RZ ");
break;
case FPCR_RND_M:
qemu_fprintf(f, "RM ");
break;
case FPCR_RND_P:
qemu_fprintf(f, "RP ");
break;
}
qemu_fprintf(f, "\n");
#ifdef CONFIG_SOFTMMU
qemu_fprintf(f, "%sA7(MSP) = %08x %sA7(USP) = %08x %sA7(ISP) = %08x\n",
env->current_sp == M68K_SSP ? "->" : " ", env->sp[M68K_SSP],
env->current_sp == M68K_USP ? "->" : " ", env->sp[M68K_USP],
env->current_sp == M68K_ISP ? "->" : " ", env->sp[M68K_ISP]);
qemu_fprintf(f, "VBR = 0x%08x\n", env->vbr);
qemu_fprintf(f, "SFC = %x DFC %x\n", env->sfc, env->dfc);
qemu_fprintf(f, "SSW %08x TCR %08x URP %08x SRP %08x\n",
env->mmu.ssw, env->mmu.tcr, env->mmu.urp, env->mmu.srp);
qemu_fprintf(f, "DTTR0/1: %08x/%08x ITTR0/1: %08x/%08x\n",
env->mmu.ttr[M68K_DTTR0], env->mmu.ttr[M68K_DTTR1],
env->mmu.ttr[M68K_ITTR0], env->mmu.ttr[M68K_ITTR1]);
qemu_fprintf(f, "MMUSR %08x, fault at %08x\n",
env->mmu.mmusr, env->mmu.ar);
#endif
}
void restore_state_to_opc(CPUM68KState *env, TranslationBlock *tb,
target_ulong *data)
{
int cc_op = data[1];
env->pc = data[0];
if (cc_op != CC_OP_DYNAMIC) {
env->cc_op = cc_op;
}
}
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