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qemu-e2k/target-m68k/translate.c
Sergey Fedorov 90aa39a1cc tcg: Allow goto_tb to any target PC in user mode 
In user mode, there's only a static address translation, TBs are always
invalidated properly and direct jumps are reset when mapping change.
Thus the destination address is always valid for direct jumps and
there's no need to restrict it to the pages the TB resides in.

Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Blue Swirl <blauwirbel@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
2016-05-12 14:06:42 -10:00

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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 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
* 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 "tcg-op.h"
#include "qemu/log.h"
#include "exec/cpu_ldst.h"
#include "exec/helper-proto.h"
#include "exec/helper-gen.h"
#include "trace-tcg.h"
#include "exec/log.h"
//#define DEBUG_DISPATCH 1
/* Fake floating point. */
#define tcg_gen_mov_f64 tcg_gen_mov_i64
#define tcg_gen_qemu_ldf64 tcg_gen_qemu_ld64
#define tcg_gen_qemu_stf64 tcg_gen_qemu_st64
#define DEFO32(name, offset) static TCGv QREG_##name;
#define DEFO64(name, offset) static TCGv_i64 QREG_##name;
#define DEFF64(name, offset) static TCGv_i64 QREG_##name;
#include "qregs.def"
#undef DEFO32
#undef DEFO64
#undef DEFF64
static TCGv_i32 cpu_halted;
static TCGv_i32 cpu_exception_index;
static TCGv_env cpu_env;
static char cpu_reg_names[3*8*3 + 5*4];
static TCGv cpu_dregs[8];
static TCGv cpu_aregs[8];
static TCGv_i64 cpu_fregs[8];
static TCGv_i64 cpu_macc[4];
#define DREG(insn, pos) cpu_dregs[((insn) >> (pos)) & 7]
#define AREG(insn, pos) cpu_aregs[((insn) >> (pos)) & 7]
#define FREG(insn, pos) cpu_fregs[((insn) >> (pos)) & 7]
#define MACREG(acc) cpu_macc[acc]
#define QREG_SP cpu_aregs[7]
static TCGv NULL_QREG;
#define IS_NULL_QREG(t) (TCGV_EQUAL(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;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
#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);
#define DEFF64(name, offset) DEFO64(name, offset)
#include "qregs.def"
#undef DEFO32
#undef DEFO64
#undef DEFF64
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;
sprintf(p, "F%d", i);
cpu_fregs[i] = tcg_global_mem_new_i64(cpu_env,
offsetof(CPUM68KState, fregs[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 {
CPUM68KState *env;
target_ulong insn_pc; /* Start of the current instruction. */
target_ulong pc;
int is_jmp;
int cc_op;
int user;
uint32_t fpcr;
struct TranslationBlock *tb;
int singlestep_enabled;
TCGv_i64 mactmp;
int done_mac;
} DisasContext;
#define DISAS_JUMP_NEXT 4
#if defined(CONFIG_USER_ONLY)
#define IS_USER(s) 1
#else
#define IS_USER(s) s->user
#endif
/* XXX: move that elsewhere */
/* ??? Fix exceptions. */
static void *gen_throws_exception;
#define gen_last_qop NULL
#define OS_BYTE 0
#define OS_WORD 1
#define OS_LONG 2
#define OS_SINGLE 4
#define OS_DOUBLE 5
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(s, env, 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
/* 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)
{
TCGv tmp;
int index = IS_USER(s);
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:
case OS_SINGLE:
tcg_gen_qemu_ld32u(tmp, addr, index);
break;
default:
g_assert_not_reached();
}
gen_throws_exception = gen_last_qop;
return tmp;
}
static inline TCGv_i64 gen_load64(DisasContext * s, TCGv addr)
{
TCGv_i64 tmp;
int index = IS_USER(s);
tmp = tcg_temp_new_i64();
tcg_gen_qemu_ldf64(tmp, addr, index);
gen_throws_exception = gen_last_qop;
return tmp;
}
/* Generate a store. */
static inline void gen_store(DisasContext *s, int opsize, TCGv addr, TCGv val)
{
int index = IS_USER(s);
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:
case OS_SINGLE:
tcg_gen_qemu_st32(val, addr, index);
break;
default:
g_assert_not_reached();
}
gen_throws_exception = gen_last_qop;
}
static inline void gen_store64(DisasContext *s, TCGv addr, TCGv_i64 val)
{
int index = IS_USER(s);
tcg_gen_qemu_stf64(val, addr, index);
gen_throws_exception = gen_last_qop;
}
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)
{
if (what == EA_STORE) {
gen_store(s, opsize, addr, val);
return store_dummy;
} else {
return gen_load(s, opsize, addr, what == EA_LOADS);
}
}
/* Read a 32-bit immediate constant. */
static inline uint32_t read_im32(CPUM68KState *env, DisasContext *s)
{
uint32_t im;
im = ((uint32_t)cpu_lduw_code(env, s->pc)) << 16;
s->pc += 2;
im |= cpu_lduw_code(env, s->pc);
s->pc += 2;
return im;
}
/* Calculate and address index. */
static TCGv gen_addr_index(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 addresss.
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 = cpu_lduw_code(env, s->pc);
s->pc += 2;
if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX))
return NULL_QREG;
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)cpu_lduw_code(env, s->pc);
s->pc += 2;
} else {
bd = read_im32(env, s);
}
} else {
bd = 0;
}
tmp = tcg_temp_new();
if ((ext & 0x44) == 0) {
/* pre-index */
add = gen_addr_index(ext, tmp);
} else {
add = NULL_QREG;
}
if ((ext & 0x80) == 0) {
/* base not suppressed */
if (IS_NULL_QREG(base)) {
base = 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 = tcg_const_i32(bd);
}
if ((ext & 3) != 0) {
/* memory indirect */
base = gen_load(s, OS_LONG, add, 0);
if ((ext & 0x44) == 4) {
add = gen_addr_index(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)cpu_lduw_code(env, s->pc);
s->pc += 2;
} 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 = tcg_temp_new();
add = gen_addr_index(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;
}
/* Update the CPU env CC_OP state. */
static inline void gen_flush_cc_op(DisasContext *s)
{
if (s->cc_op != CC_OP_DYNAMIC)
tcg_gen_movi_i32(QREG_CC_OP, s->cc_op);
}
/* Evaluate all the CC flags. */
static inline void gen_flush_flags(DisasContext *s)
{
if (s->cc_op == CC_OP_FLAGS)
return;
gen_flush_cc_op(s);
gen_helper_flush_flags(cpu_env, QREG_CC_OP);
s->cc_op = CC_OP_FLAGS;
}
static void gen_logic_cc(DisasContext *s, TCGv val)
{
tcg_gen_mov_i32(QREG_CC_DEST, val);
s->cc_op = CC_OP_LOGIC;
}
static void gen_update_cc_add(TCGv dest, TCGv src)
{
tcg_gen_mov_i32(QREG_CC_DEST, dest);
tcg_gen_mov_i32(QREG_CC_SRC, 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;
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);
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);
break;
case OS_LONG:
case OS_SINGLE:
tcg_gen_mov_i32(reg, val);
break;
default:
g_assert_not_reached();
}
}
/* Sign or zero extend a value. */
static inline TCGv gen_extend(TCGv val, int opsize, int sign)
{
TCGv tmp;
switch (opsize) {
case OS_BYTE:
tmp = tcg_temp_new();
if (sign)
tcg_gen_ext8s_i32(tmp, val);
else
tcg_gen_ext8u_i32(tmp, val);
break;
case OS_WORD:
tmp = tcg_temp_new();
if (sign)
tcg_gen_ext16s_i32(tmp, val);
else
tcg_gen_ext16u_i32(tmp, val);
break;
case OS_LONG:
case OS_SINGLE:
tmp = val;
break;
default:
g_assert_not_reached();
}
return tmp;
}
/* Generate code for an "effective address". Does not adjust the base
register for autoincrement addressing modes. */
static TCGv gen_lea(CPUM68KState *env, DisasContext *s, uint16_t insn,
int opsize)
{
TCGv reg;
TCGv tmp;
uint16_t ext;
uint32_t offset;
switch ((insn >> 3) & 7) {
case 0: /* Data register direct. */
case 1: /* Address register direct. */
return NULL_QREG;
case 2: /* Indirect register */
case 3: /* Indirect postincrement. */
return AREG(insn, 0);
case 4: /* Indirect predecrememnt. */
reg = AREG(insn, 0);
tmp = tcg_temp_new();
tcg_gen_subi_i32(tmp, reg, opsize_bytes(opsize));
return tmp;
case 5: /* Indirect displacement. */
reg = AREG(insn, 0);
tmp = tcg_temp_new();
ext = cpu_lduw_code(env, s->pc);
s->pc += 2;
tcg_gen_addi_i32(tmp, reg, (int16_t)ext);
return tmp;
case 6: /* Indirect index + displacement. */
reg = AREG(insn, 0);
return gen_lea_indexed(env, s, reg);
case 7: /* Other */
switch (insn & 7) {
case 0: /* Absolute short. */
offset = cpu_ldsw_code(env, s->pc);
s->pc += 2;
return tcg_const_i32(offset);
case 1: /* Absolute long. */
offset = read_im32(env, s);
return tcg_const_i32(offset);
case 2: /* pc displacement */
offset = s->pc;
offset += cpu_ldsw_code(env, s->pc);
s->pc += 2;
return 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;
}
/* Helper function for gen_ea. Reuse the computed address between the
for read/write operands. */
static inline TCGv gen_ea_once(CPUM68KState *env, DisasContext *s,
uint16_t insn, int opsize, TCGv val,
TCGv *addrp, ea_what what)
{
TCGv tmp;
if (addrp && what == EA_STORE) {
tmp = *addrp;
} else {
tmp = gen_lea(env, s, insn, opsize);
if (IS_NULL_QREG(tmp))
return tmp;
if (addrp)
*addrp = tmp;
}
return gen_ldst(s, opsize, tmp, val, what);
}
/* Generate code to load/store a value from/into an EA. If VAL > 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(CPUM68KState *env, DisasContext *s, uint16_t insn,
int opsize, TCGv val, TCGv *addrp, ea_what what)
{
TCGv reg;
TCGv result;
uint32_t offset;
switch ((insn >> 3) & 7) {
case 0: /* Data register direct. */
reg = DREG(insn, 0);
if (what == EA_STORE) {
gen_partset_reg(opsize, reg, val);
return store_dummy;
} else {
return gen_extend(reg, opsize, what == EA_LOADS);
}
case 1: /* Address register direct. */
reg = AREG(insn, 0);
if (what == EA_STORE) {
tcg_gen_mov_i32(reg, val);
return store_dummy;
} else {
return gen_extend(reg, opsize, what == EA_LOADS);
}
case 2: /* Indirect register */
reg = AREG(insn, 0);
return gen_ldst(s, opsize, reg, val, what);
case 3: /* Indirect postincrement. */
reg = AREG(insn, 0);
result = gen_ldst(s, opsize, reg, val, what);
/* ??? This is not exception safe. The instruction may still
fault after this point. */
if (what == EA_STORE || !addrp)
tcg_gen_addi_i32(reg, reg, opsize_bytes(opsize));
return result;
case 4: /* Indirect predecrememnt. */
{
TCGv tmp;
if (addrp && what == EA_STORE) {
tmp = *addrp;
} else {
tmp = gen_lea(env, s, insn, opsize);
if (IS_NULL_QREG(tmp))
return tmp;
if (addrp)
*addrp = tmp;
}
result = gen_ldst(s, opsize, tmp, val, what);
/* ??? This is not exception safe. The instruction may still
fault after this point. */
if (what == EA_STORE || !addrp) {
reg = AREG(insn, 0);
tcg_gen_mov_i32(reg, tmp);
}
}
return result;
case 5: /* Indirect displacement. */
case 6: /* Indirect index + displacement. */
return gen_ea_once(env, s, insn, opsize, val, addrp, what);
case 7: /* Other */
switch (insn & 7) {
case 0: /* Absolute short. */
case 1: /* Absolute long. */
case 2: /* pc displacement */
case 3: /* pc index+displacement. */
return gen_ea_once(env, s, insn, opsize, val, addrp, what);
case 4: /* Immediate. */
/* Sign extend values for consistency. */
switch (opsize) {
case OS_BYTE:
if (what == EA_LOADS) {
offset = cpu_ldsb_code(env, s->pc + 1);
} else {
offset = cpu_ldub_code(env, s->pc + 1);
}
s->pc += 2;
break;
case OS_WORD:
if (what == EA_LOADS) {
offset = cpu_ldsw_code(env, s->pc);
} else {
offset = cpu_lduw_code(env, s->pc);
}
s->pc += 2;
break;
case OS_LONG:
offset = read_im32(env, s);
break;
default:
g_assert_not_reached();
}
return tcg_const_i32(offset);
default:
return NULL_QREG;
}
}
/* Should never happen. */
return NULL_QREG;
}
/* This generates a conditional branch, clobbering all temporaries. */
static void gen_jmpcc(DisasContext *s, int cond, TCGLabel *l1)
{
TCGv tmp;
/* TODO: Optimize compare/branch pairs rather than always flushing
flag state to CC_OP_FLAGS. */
gen_flush_flags(s);
switch (cond) {
case 0: /* T */
tcg_gen_br(l1);
break;
case 1: /* F */
break;
case 2: /* HI (!C && !Z) */
tmp = tcg_temp_new();
tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C | CCF_Z);
tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
break;
case 3: /* LS (C || Z) */
tmp = tcg_temp_new();
tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C | CCF_Z);
tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
break;
case 4: /* CC (!C) */
tmp = tcg_temp_new();
tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C);
tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
break;
case 5: /* CS (C) */
tmp = tcg_temp_new();
tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C);
tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
break;
case 6: /* NE (!Z) */
tmp = tcg_temp_new();
tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_Z);
tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
break;
case 7: /* EQ (Z) */
tmp = tcg_temp_new();
tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_Z);
tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
break;
case 8: /* VC (!V) */
tmp = tcg_temp_new();
tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_V);
tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
break;
case 9: /* VS (V) */
tmp = tcg_temp_new();
tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_V);
tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
break;
case 10: /* PL (!N) */
tmp = tcg_temp_new();
tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
break;
case 11: /* MI (N) */
tmp = tcg_temp_new();
tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
break;
case 12: /* GE (!(N ^ V)) */
tmp = tcg_temp_new();
assert(CCF_V == (CCF_N >> 2));
tcg_gen_shri_i32(tmp, QREG_CC_DEST, 2);
tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
tcg_gen_andi_i32(tmp, tmp, CCF_V);
tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
break;
case 13: /* LT (N ^ V) */
tmp = tcg_temp_new();
assert(CCF_V == (CCF_N >> 2));
tcg_gen_shri_i32(tmp, QREG_CC_DEST, 2);
tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
tcg_gen_andi_i32(tmp, tmp, CCF_V);
tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
break;
case 14: /* GT (!(Z || (N ^ V))) */
tmp = tcg_temp_new();
assert(CCF_V == (CCF_N >> 2));
tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
tcg_gen_shri_i32(tmp, tmp, 2);
tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
tcg_gen_andi_i32(tmp, tmp, CCF_V | CCF_Z);
tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
break;
case 15: /* LE (Z || (N ^ V)) */
tmp = tcg_temp_new();
assert(CCF_V == (CCF_N >> 2));
tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
tcg_gen_shri_i32(tmp, tmp, 2);
tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
tcg_gen_andi_i32(tmp, tmp, CCF_V | CCF_Z);
tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
break;
default:
/* Should ever happen. */
abort();
}
}
DISAS_INSN(scc)
{
TCGLabel *l1;
int cond;
TCGv reg;
l1 = gen_new_label();
cond = (insn >> 8) & 0xf;
reg = DREG(insn, 0);
tcg_gen_andi_i32(reg, reg, 0xffffff00);
/* This is safe because we modify the reg directly, with no other values
live. */
gen_jmpcc(s, cond ^ 1, l1);
tcg_gen_ori_i32(reg, reg, 0xff);
gen_set_label(l1);
}
/* Force a TB lookup after an instruction that changes the CPU state. */
static void gen_lookup_tb(DisasContext *s)
{
gen_flush_cc_op(s);
tcg_gen_movi_i32(QREG_PC, s->pc);
s->is_jmp = DISAS_UPDATE;
}
/* Generate a jump to an immediate address. */
static void gen_jmp_im(DisasContext *s, uint32_t dest)
{
gen_flush_cc_op(s);
tcg_gen_movi_i32(QREG_PC, dest);
s->is_jmp = DISAS_JUMP;
}
/* Generate a jump to the address in qreg DEST. */
static void gen_jmp(DisasContext *s, TCGv dest)
{
gen_flush_cc_op(s);
tcg_gen_mov_i32(QREG_PC, dest);
s->is_jmp = DISAS_JUMP;
}
static void gen_exception(DisasContext *s, uint32_t where, int nr)
{
gen_flush_cc_op(s);
gen_jmp_im(s, where);
gen_helper_raise_exception(cpu_env, tcg_const_i32(nr));
}
static inline void gen_addr_fault(DisasContext *s)
{
gen_exception(s, s->insn_pc, EXCP_ADDRESS);
}
#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); \
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); \
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->tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) ||
(s->insn_pc & 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(s->singlestep_enabled)) {
gen_exception(s, dest, EXCP_DEBUG);
} else if (use_goto_tb(s, dest)) {
tcg_gen_goto_tb(n);
tcg_gen_movi_i32(QREG_PC, dest);
tcg_gen_exit_tb((uintptr_t)s->tb + n);
} else {
gen_jmp_im(s, dest);
tcg_gen_exit_tb(0);
}
s->is_jmp = DISAS_TB_JUMP;
}
DISAS_INSN(undef_mac)
{
gen_exception(s, s->pc - 2, EXCP_LINEA);
}
DISAS_INSN(undef_fpu)
{
gen_exception(s, s->pc - 2, EXCP_LINEF);
}
DISAS_INSN(undef)
{
M68kCPU *cpu = m68k_env_get_cpu(env);
gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED);
cpu_abort(CPU(cpu), "Illegal instruction: %04x @ %08x", insn, s->pc - 2);
}
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);
/* Unlike m68k, coldfire always clears the overflow bit. */
gen_logic_cc(s, tmp);
}
DISAS_INSN(divw)
{
TCGv reg;
TCGv tmp;
TCGv src;
int sign;
sign = (insn & 0x100) != 0;
reg = DREG(insn, 9);
if (sign) {
tcg_gen_ext16s_i32(QREG_DIV1, reg);
} else {
tcg_gen_ext16u_i32(QREG_DIV1, reg);
}
SRC_EA(env, src, OS_WORD, sign, NULL);
tcg_gen_mov_i32(QREG_DIV2, src);
if (sign) {
gen_helper_divs(cpu_env, tcg_const_i32(1));
} else {
gen_helper_divu(cpu_env, tcg_const_i32(1));
}
tmp = tcg_temp_new();
src = tcg_temp_new();
tcg_gen_ext16u_i32(tmp, QREG_DIV1);
tcg_gen_shli_i32(src, QREG_DIV2, 16);
tcg_gen_or_i32(reg, tmp, src);
s->cc_op = CC_OP_FLAGS;
}
DISAS_INSN(divl)
{
TCGv num;
TCGv den;
TCGv reg;
uint16_t ext;
ext = cpu_lduw_code(env, s->pc);
s->pc += 2;
if (ext & 0x87f8) {
gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
return;
}
num = DREG(ext, 12);
reg = DREG(ext, 0);
tcg_gen_mov_i32(QREG_DIV1, num);
SRC_EA(env, den, OS_LONG, 0, NULL);
tcg_gen_mov_i32(QREG_DIV2, den);
if (ext & 0x0800) {
gen_helper_divs(cpu_env, tcg_const_i32(0));
} else {
gen_helper_divu(cpu_env, tcg_const_i32(0));
}
if ((ext & 7) == ((ext >> 12) & 7)) {
/* div */
tcg_gen_mov_i32 (reg, QREG_DIV1);
} else {
/* rem */
tcg_gen_mov_i32 (reg, QREG_DIV2);
}
s->cc_op = CC_OP_FLAGS;
}
DISAS_INSN(addsub)
{
TCGv reg;
TCGv dest;
TCGv src;
TCGv tmp;
TCGv addr;
int add;
add = (insn & 0x4000) != 0;
reg = DREG(insn, 9);
dest = tcg_temp_new();
if (insn & 0x100) {
SRC_EA(env, tmp, OS_LONG, 0, &addr);
src = reg;
} else {
tmp = reg;
SRC_EA(env, src, OS_LONG, 0, NULL);
}
if (add) {
tcg_gen_add_i32(dest, tmp, src);
gen_helper_xflag_lt(QREG_CC_X, dest, src);
s->cc_op = CC_OP_ADD;
} else {
gen_helper_xflag_lt(QREG_CC_X, tmp, src);
tcg_gen_sub_i32(dest, tmp, src);
s->cc_op = CC_OP_SUB;
}
gen_update_cc_add(dest, src);
if (insn & 0x100) {
DEST_EA(env, insn, OS_LONG, dest, &addr);
} else {
tcg_gen_mov_i32(reg, 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);
src2 = DREG(insn, 9);
dest = tcg_temp_new();
gen_flush_flags(s);
tmp = tcg_temp_new();
if (opsize == OS_BYTE)
tcg_gen_andi_i32(tmp, src2, 7);
else
tcg_gen_andi_i32(tmp, src2, 31);
src2 = tmp;
tmp = tcg_temp_new();
tcg_gen_shr_i32(tmp, src1, src2);
tcg_gen_andi_i32(tmp, tmp, 1);
tcg_gen_shli_i32(tmp, tmp, 2);
/* Clear CCF_Z if bit set. */
tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z);
tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp);
tcg_gen_shl_i32(tmp, tcg_const_i32(1), src2);
switch (op) {
case 1: /* bchg */
tcg_gen_xor_i32(dest, src1, tmp);
break;
case 2: /* bclr */
tcg_gen_not_i32(tmp, tmp);
tcg_gen_and_i32(dest, src1, tmp);
break;
case 3: /* bset */
tcg_gen_or_i32(dest, src1, tmp);
break;
default: /* btst */
break;
}
if (op)
DEST_EA(env, insn, opsize, dest, &addr);
}
DISAS_INSN(sats)
{
TCGv reg;
reg = DREG(insn, 0);
gen_flush_flags(s);
gen_helper_sats(reg, reg, QREG_CC_DEST);
gen_logic_cc(s, reg);
}
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);
tcg_gen_mov_i32(QREG_SP, tmp);
}
DISAS_INSN(movem)
{
TCGv addr;
int i;
uint16_t mask;
TCGv reg;
TCGv tmp;
int is_load;
mask = cpu_lduw_code(env, s->pc);
s->pc += 2;
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);
is_load = ((insn & 0x0400) != 0);
for (i = 0; i < 16; i++, mask >>= 1) {
if (mask & 1) {
if (i < 8)
reg = DREG(i, 0);
else
reg = AREG(i, 0);
if (is_load) {
tmp = gen_load(s, OS_LONG, addr, 0);
tcg_gen_mov_i32(reg, tmp);
} else {
gen_store(s, OS_LONG, addr, reg);
}
if (mask != 1)
tcg_gen_addi_i32(addr, addr, 4);
}
}
}
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 = cpu_lduw_code(env, s->pc);
s->pc += 2;
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;
tmp = tcg_temp_new();
assert (CCF_Z == (1 << 2));
if (bitnum > 2)
tcg_gen_shri_i32(tmp, src1, bitnum - 2);
else if (bitnum < 2)
tcg_gen_shli_i32(tmp, src1, 2 - bitnum);
else
tcg_gen_mov_i32(tmp, src1);
tcg_gen_andi_i32(tmp, tmp, CCF_Z);
/* Clear CCF_Z if bit set. */
tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z);
tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp);
if (op) {
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);
}
}
DISAS_INSN(arith_im)
{
int op;
uint32_t im;
TCGv src1;
TCGv dest;
TCGv addr;
op = (insn >> 9) & 7;
SRC_EA(env, src1, OS_LONG, 0, (op == 6) ? NULL : &addr);
im = read_im32(env, s);
dest = tcg_temp_new();
switch (op) {
case 0: /* ori */
tcg_gen_ori_i32(dest, src1, im);
gen_logic_cc(s, dest);
break;
case 1: /* andi */
tcg_gen_andi_i32(dest, src1, im);
gen_logic_cc(s, dest);
break;
case 2: /* subi */
tcg_gen_mov_i32(dest, src1);
gen_helper_xflag_lt(QREG_CC_X, dest, tcg_const_i32(im));
tcg_gen_subi_i32(dest, dest, im);
gen_update_cc_add(dest, tcg_const_i32(im));
s->cc_op = CC_OP_SUB;
break;
case 3: /* addi */
tcg_gen_mov_i32(dest, src1);
tcg_gen_addi_i32(dest, dest, im);
gen_update_cc_add(dest, tcg_const_i32(im));
gen_helper_xflag_lt(QREG_CC_X, dest, tcg_const_i32(im));
s->cc_op = CC_OP_ADD;
break;
case 5: /* eori */
tcg_gen_xori_i32(dest, src1, im);
gen_logic_cc(s, dest);
break;
case 6: /* cmpi */
tcg_gen_mov_i32(dest, src1);
tcg_gen_subi_i32(dest, dest, im);
gen_update_cc_add(dest, tcg_const_i32(im));
s->cc_op = CC_OP_SUB;
break;
default:
abort();
}
if (op != 6) {
DEST_EA(env, insn, OS_LONG, dest, &addr);
}
}
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);
}
}
DISAS_INSN(negx)
{
TCGv reg;
gen_flush_flags(s);
reg = DREG(insn, 0);
gen_helper_subx_cc(reg, cpu_env, tcg_const_i32(0), reg);
}
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;
switch ((insn >> 6) & 3) {
case 0: /* clr.b */
opsize = OS_BYTE;
break;
case 1: /* clr.w */
opsize = OS_WORD;
break;
case 2: /* clr.l */
opsize = OS_LONG;
break;
default:
abort();
}
DEST_EA(env, insn, opsize, tcg_const_i32(0), NULL);
gen_logic_cc(s, tcg_const_i32(0));
}
static TCGv gen_get_ccr(DisasContext *s)
{
TCGv dest;
gen_flush_flags(s);
dest = tcg_temp_new();
tcg_gen_shli_i32(dest, QREG_CC_X, 4);
tcg_gen_or_i32(dest, dest, QREG_CC_DEST);
return dest;
}
DISAS_INSN(move_from_ccr)
{
TCGv reg;
TCGv ccr;
ccr = gen_get_ccr(s);
reg = DREG(insn, 0);
gen_partset_reg(OS_WORD, reg, ccr);
}
DISAS_INSN(neg)
{
TCGv reg;
TCGv src1;
reg = DREG(insn, 0);
src1 = tcg_temp_new();
tcg_gen_mov_i32(src1, reg);
tcg_gen_neg_i32(reg, src1);
s->cc_op = CC_OP_SUB;
gen_update_cc_add(reg, src1);
gen_helper_xflag_lt(QREG_CC_X, tcg_const_i32(0), src1);
s->cc_op = CC_OP_SUB;
}
static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)
{
tcg_gen_movi_i32(QREG_CC_DEST, val & 0xf);
tcg_gen_movi_i32(QREG_CC_X, (val & 0x10) >> 4);
if (!ccr_only) {
gen_helper_set_sr(cpu_env, tcg_const_i32(val & 0xff00));
}
}
static void gen_set_sr(CPUM68KState *env, DisasContext *s, uint16_t insn,
int ccr_only)
{
TCGv tmp;
TCGv reg;
s->cc_op = CC_OP_FLAGS;
if ((insn & 0x38) == 0)
{
tmp = tcg_temp_new();
reg = DREG(insn, 0);
tcg_gen_andi_i32(QREG_CC_DEST, reg, 0xf);
tcg_gen_shri_i32(tmp, reg, 4);
tcg_gen_andi_i32(QREG_CC_X, tmp, 1);
if (!ccr_only) {
gen_helper_set_sr(cpu_env, reg);
}
}
else if ((insn & 0x3f) == 0x3c)
{
uint16_t val;
val = cpu_lduw_code(env, s->pc);
s->pc += 2;
gen_set_sr_im(s, val, ccr_only);
}
else
disas_undef(env, s, insn);
}
DISAS_INSN(move_to_ccr)
{
gen_set_sr(env, s, insn, 1);
}
DISAS_INSN(not)
{
TCGv reg;
reg = DREG(insn, 0);
tcg_gen_not_i32(reg, reg);
gen_logic_cc(s, reg);
}
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);
gen_logic_cc(s, reg);
}
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);
}
DISAS_INSN(tst)
{
int opsize;
TCGv tmp;
switch ((insn >> 6) & 3) {
case 0: /* tst.b */
opsize = OS_BYTE;
break;
case 1: /* tst.w */
opsize = OS_WORD;
break;
case 2: /* tst.l */
opsize = OS_LONG;
break;
default:
abort();
}
SRC_EA(env, tmp, opsize, 1, NULL);
gen_logic_cc(s, tmp);
}
DISAS_INSN(pulse)
{
/* Implemented as a NOP. */
}
DISAS_INSN(illegal)
{
gen_exception(s, s->pc - 2, 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);
tcg_gen_ori_i32(dest, src1, 0x80);
DEST_EA(env, insn, OS_BYTE, dest, &addr);
}
DISAS_INSN(mull)
{
uint16_t ext;
TCGv reg;
TCGv src1;
TCGv dest;
/* The upper 32 bits of the product are discarded, so
muls.l and mulu.l are functionally equivalent. */
ext = cpu_lduw_code(env, s->pc);
s->pc += 2;
if (ext & 0x87ff) {
gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
return;
}
reg = DREG(ext, 12);
SRC_EA(env, src1, OS_LONG, 0, NULL);
dest = tcg_temp_new();
tcg_gen_mul_i32(dest, src1, reg);
tcg_gen_mov_i32(reg, dest);
/* Unlike m68k, coldfire always clears the overflow bit. */
gen_logic_cc(s, dest);
}
DISAS_INSN(link)
{
int16_t offset;
TCGv reg;
TCGv tmp;
offset = cpu_ldsw_code(env, s->pc);
s->pc += 2;
reg = AREG(insn, 0);
tmp = tcg_temp_new();
tcg_gen_subi_i32(tmp, QREG_SP, 4);
gen_store(s, OS_LONG, tmp, reg);
if ((insn & 7) != 7)
tcg_gen_mov_i32(reg, tmp);
tcg_gen_addi_i32(QREG_SP, tmp, 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);
tcg_gen_mov_i32(reg, tmp);
tcg_gen_addi_i32(QREG_SP, src, 4);
}
DISAS_INSN(nop)
{
}
DISAS_INSN(rts)
{
TCGv tmp;
tmp = gen_load(s, OS_LONG, QREG_SP, 0);
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 src1;
TCGv src2;
TCGv dest;
int val;
TCGv addr;
SRC_EA(env, src1, OS_LONG, 0, &addr);
val = (insn >> 9) & 7;
if (val == 0)
val = 8;
dest = tcg_temp_new();
tcg_gen_mov_i32(dest, src1);
if ((insn & 0x38) == 0x08) {
/* Don't update condition codes if the destination is an
address register. */
if (insn & 0x0100) {
tcg_gen_subi_i32(dest, dest, val);
} else {
tcg_gen_addi_i32(dest, dest, val);
}
} else {
src2 = tcg_const_i32(val);
if (insn & 0x0100) {
gen_helper_xflag_lt(QREG_CC_X, dest, src2);
tcg_gen_subi_i32(dest, dest, val);
s->cc_op = CC_OP_SUB;
} else {
tcg_gen_addi_i32(dest, dest, val);
gen_helper_xflag_lt(QREG_CC_X, dest, src2);
s->cc_op = CC_OP_ADD;
}
gen_update_cc_add(dest, src2);
}
DEST_EA(env, insn, OS_LONG, dest, &addr);
}
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;
TCGLabel *l1;
base = s->pc;
op = (insn >> 8) & 0xf;
offset = (int8_t)insn;
if (offset == 0) {
offset = cpu_ldsw_code(env, s->pc);
s->pc += 2;
} else if (offset == -1) {
offset = read_im32(env, s);
}
if (op == 1) {
/* bsr */
gen_push(s, tcg_const_i32(s->pc));
}
gen_flush_cc_op(s);
if (op > 1) {
/* Bcc */
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. */
gen_jmp_tb(s, 0, base + offset);
}
}
DISAS_INSN(moveq)
{
uint32_t val;
val = (int8_t)insn;
tcg_gen_movi_i32(DREG(insn, 9), val);
gen_logic_cc(s, tcg_const_i32(val));
}
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);
}
DISAS_INSN(or)
{
TCGv reg;
TCGv dest;
TCGv src;
TCGv addr;
reg = DREG(insn, 9);
dest = tcg_temp_new();
if (insn & 0x100) {
SRC_EA(env, src, OS_LONG, 0, &addr);
tcg_gen_or_i32(dest, src, reg);
DEST_EA(env, insn, OS_LONG, dest, &addr);
} else {
SRC_EA(env, src, OS_LONG, 0, NULL);
tcg_gen_or_i32(dest, src, reg);
tcg_gen_mov_i32(reg, dest);
}
gen_logic_cc(s, dest);
}
DISAS_INSN(suba)
{
TCGv src;
TCGv reg;
SRC_EA(env, src, OS_LONG, 0, NULL);
reg = AREG(insn, 9);
tcg_gen_sub_i32(reg, reg, src);
}
DISAS_INSN(subx)
{
TCGv reg;
TCGv src;
gen_flush_flags(s);
reg = DREG(insn, 9);
src = DREG(insn, 0);
gen_helper_subx_cc(reg, cpu_env, reg, 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);
DEST_EA(env, insn, OS_LONG, src, NULL);
}
DISAS_INSN(cmp)
{
int op;
TCGv src;
TCGv reg;
TCGv dest;
int opsize;
op = (insn >> 6) & 3;
switch (op) {
case 0: /* cmp.b */
opsize = OS_BYTE;
s->cc_op = CC_OP_CMPB;
break;
case 1: /* cmp.w */
opsize = OS_WORD;
s->cc_op = CC_OP_CMPW;
break;
case 2: /* cmp.l */
opsize = OS_LONG;
s->cc_op = CC_OP_SUB;
break;
default:
abort();
}
SRC_EA(env, src, opsize, 1, NULL);
reg = DREG(insn, 9);
dest = tcg_temp_new();
tcg_gen_sub_i32(dest, reg, src);
gen_update_cc_add(dest, src);
}
DISAS_INSN(cmpa)
{
int opsize;
TCGv src;
TCGv reg;
TCGv dest;
if (insn & 0x100) {
opsize = OS_LONG;
} else {
opsize = OS_WORD;
}
SRC_EA(env, src, opsize, 1, NULL);
reg = AREG(insn, 9);
dest = tcg_temp_new();
tcg_gen_sub_i32(dest, reg, src);
gen_update_cc_add(dest, src);
s->cc_op = CC_OP_SUB;
}
DISAS_INSN(eor)
{
TCGv src;
TCGv reg;
TCGv dest;
TCGv addr;
SRC_EA(env, src, OS_LONG, 0, &addr);
reg = DREG(insn, 9);
dest = tcg_temp_new();
tcg_gen_xor_i32(dest, src, reg);
gen_logic_cc(s, dest);
DEST_EA(env, insn, OS_LONG, dest, &addr);
}
DISAS_INSN(and)
{
TCGv src;
TCGv reg;
TCGv dest;
TCGv addr;
reg = DREG(insn, 9);
dest = tcg_temp_new();
if (insn & 0x100) {
SRC_EA(env, src, OS_LONG, 0, &addr);
tcg_gen_and_i32(dest, src, reg);
DEST_EA(env, insn, OS_LONG, dest, &addr);
} else {
SRC_EA(env, src, OS_LONG, 0, NULL);
tcg_gen_and_i32(dest, src, reg);
tcg_gen_mov_i32(reg, dest);
}
gen_logic_cc(s, dest);
}
DISAS_INSN(adda)
{
TCGv src;
TCGv reg;
SRC_EA(env, src, OS_LONG, 0, NULL);
reg = AREG(insn, 9);
tcg_gen_add_i32(reg, reg, src);
}
DISAS_INSN(addx)
{
TCGv reg;
TCGv src;
gen_flush_flags(s);
reg = DREG(insn, 9);
src = DREG(insn, 0);
gen_helper_addx_cc(reg, cpu_env, reg, src);
s->cc_op = CC_OP_FLAGS;
}
/* TODO: This could be implemented without helper functions. */
DISAS_INSN(shift_im)
{
TCGv reg;
int tmp;
TCGv shift;
reg = DREG(insn, 0);
tmp = (insn >> 9) & 7;
if (tmp == 0)
tmp = 8;
shift = tcg_const_i32(tmp);
/* No need to flush flags becuse we know we will set C flag. */
if (insn & 0x100) {
gen_helper_shl_cc(reg, cpu_env, reg, shift);
} else {
if (insn & 8) {
gen_helper_shr_cc(reg, cpu_env, reg, shift);
} else {
gen_helper_sar_cc(reg, cpu_env, reg, shift);
}
}
s->cc_op = CC_OP_SHIFT;
}
DISAS_INSN(shift_reg)
{
TCGv reg;
TCGv shift;
reg = DREG(insn, 0);
shift = DREG(insn, 9);
/* Shift by zero leaves C flag unmodified. */
gen_flush_flags(s);
if (insn & 0x100) {
gen_helper_shl_cc(reg, cpu_env, reg, shift);
} else {
if (insn & 8) {
gen_helper_shr_cc(reg, cpu_env, reg, shift);
} else {
gen_helper_sar_cc(reg, cpu_env, reg, shift);
}
}
s->cc_op = CC_OP_SHIFT;
}
DISAS_INSN(ff1)
{
TCGv reg;
reg = DREG(insn, 0);
gen_logic_cc(s, reg);
gen_helper_ff1(reg, reg);
}
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);
return sr;
}
DISAS_INSN(strldsr)
{
uint16_t ext;
uint32_t addr;
addr = s->pc - 2;
ext = cpu_lduw_code(env, s->pc);
s->pc += 2;
if (ext != 0x46FC) {
gen_exception(s, addr, EXCP_UNSUPPORTED);
return;
}
ext = cpu_lduw_code(env, s->pc);
s->pc += 2;
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 reg;
TCGv sr;
if (IS_USER(s)) {
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
return;
}
sr = gen_get_sr(s);
reg = DREG(insn, 0);
gen_partset_reg(OS_WORD, reg, sr);
}
DISAS_INSN(move_to_sr)
{
if (IS_USER(s)) {
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
return;
}
gen_set_sr(env, s, insn, 0);
gen_lookup_tb(s);
}
DISAS_INSN(move_from_usp)
{
if (IS_USER(s)) {
gen_exception(s, s->pc - 2, 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->pc - 2, EXCP_PRIVILEGE);
return;
}
tcg_gen_st_i32(AREG(insn, 0), cpu_env,
offsetof(CPUM68KState, sp[M68K_USP]));
}
DISAS_INSN(halt)
{
gen_exception(s, s->pc, EXCP_HALT_INSN);
}
DISAS_INSN(stop)
{
uint16_t ext;
if (IS_USER(s)) {
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
return;
}
ext = cpu_lduw_code(env, s->pc);
s->pc += 2;
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->pc - 2, EXCP_PRIVILEGE);
return;
}
gen_exception(s, s->pc - 2, EXCP_RTE);
}
DISAS_INSN(movec)
{
uint16_t ext;
TCGv reg;
if (IS_USER(s)) {
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
return;
}
ext = cpu_lduw_code(env, s->pc);
s->pc += 2;
if (ext & 0x8000) {
reg = AREG(ext, 12);
} else {
reg = DREG(ext, 12);
}
gen_helper_movec(cpu_env, tcg_const_i32(ext & 0xfff), reg);
gen_lookup_tb(s);
}
DISAS_INSN(intouch)
{
if (IS_USER(s)) {
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
return;
}
/* ICache fetch. Implement as no-op. */
}
DISAS_INSN(cpushl)
{
if (IS_USER(s)) {
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
return;
}
/* Cache push/invalidate. Implement as no-op. */
}
DISAS_INSN(wddata)
{
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
}
DISAS_INSN(wdebug)
{
M68kCPU *cpu = m68k_env_get_cpu(env);
if (IS_USER(s)) {
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
return;
}
/* TODO: Implement wdebug. */
cpu_abort(CPU(cpu), "WDEBUG not implemented");
}
DISAS_INSN(trap)
{
gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf));
}
/* ??? FP exceptions are not implemented. Most exceptions are deferred until
immediately before the next FP instruction is executed. */
DISAS_INSN(fpu)
{
uint16_t ext;
int32_t offset;
int opmode;
TCGv_i64 src;
TCGv_i64 dest;
TCGv_i64 res;
TCGv tmp32;
int round;
int set_dest;
int opsize;
ext = cpu_lduw_code(env, s->pc);
s->pc += 2;
opmode = ext & 0x7f;
switch ((ext >> 13) & 7) {
case 0: case 2:
break;
case 1:
goto undef;
case 3: /* fmove out */
src = FREG(ext, 7);
tmp32 = tcg_temp_new_i32();
/* fmove */
/* ??? TODO: Proper behavior on overflow. */
switch ((ext >> 10) & 7) {
case 0:
opsize = OS_LONG;
gen_helper_f64_to_i32(tmp32, cpu_env, src);
break;
case 1:
opsize = OS_SINGLE;
gen_helper_f64_to_f32(tmp32, cpu_env, src);
break;
case 4:
opsize = OS_WORD;
gen_helper_f64_to_i32(tmp32, cpu_env, src);
break;
case 5: /* OS_DOUBLE */
tcg_gen_mov_i32(tmp32, AREG(insn, 0));
switch ((insn >> 3) & 7) {
case 2:
case 3:
break;
case 4:
tcg_gen_addi_i32(tmp32, tmp32, -8);
break;
case 5:
offset = cpu_ldsw_code(env, s->pc);
s->pc += 2;
tcg_gen_addi_i32(tmp32, tmp32, offset);
break;
default:
goto undef;
}
gen_store64(s, tmp32, src);
switch ((insn >> 3) & 7) {
case 3:
tcg_gen_addi_i32(tmp32, tmp32, 8);
tcg_gen_mov_i32(AREG(insn, 0), tmp32);
break;
case 4:
tcg_gen_mov_i32(AREG(insn, 0), tmp32);
break;
}
tcg_temp_free_i32(tmp32);
return;
case 6:
opsize = OS_BYTE;
gen_helper_f64_to_i32(tmp32, cpu_env, src);
break;
default:
goto undef;
}
DEST_EA(env, insn, opsize, tmp32, NULL);
tcg_temp_free_i32(tmp32);
return;
case 4: /* fmove to control register. */
switch ((ext >> 10) & 7) {
case 4: /* FPCR */
/* Not implemented. Ignore writes. */
break;
case 1: /* FPIAR */
case 2: /* FPSR */
default:
cpu_abort(NULL, "Unimplemented: fmove to control %d",
(ext >> 10) & 7);
}
break;
case 5: /* fmove from control register. */
switch ((ext >> 10) & 7) {
case 4: /* FPCR */
/* Not implemented. Always return zero. */
tmp32 = tcg_const_i32(0);
break;
case 1: /* FPIAR */
case 2: /* FPSR */
default:
cpu_abort(NULL, "Unimplemented: fmove from control %d",
(ext >> 10) & 7);
goto undef;
}
DEST_EA(env, insn, OS_LONG, tmp32, NULL);
break;
case 6: /* fmovem */
case 7:
{
TCGv addr;
uint16_t mask;
int i;
if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0)
goto undef;
tmp32 = gen_lea(env, s, insn, OS_LONG);
if (IS_NULL_QREG(tmp32)) {
gen_addr_fault(s);
return;
}
addr = tcg_temp_new_i32();
tcg_gen_mov_i32(addr, tmp32);
mask = 0x80;
for (i = 0; i < 8; i++) {
if (ext & mask) {
dest = FREG(i, 0);
if (ext & (1 << 13)) {
/* store */
tcg_gen_qemu_stf64(dest, addr, IS_USER(s));
} else {
/* load */
tcg_gen_qemu_ldf64(dest, addr, IS_USER(s));
}
if (ext & (mask - 1))
tcg_gen_addi_i32(addr, addr, 8);
}
mask >>= 1;
}
tcg_temp_free_i32(addr);
}
return;
}
if (ext & (1 << 14)) {
/* Source effective address. */
switch ((ext >> 10) & 7) {
case 0: opsize = OS_LONG; break;
case 1: opsize = OS_SINGLE; break;
case 4: opsize = OS_WORD; break;
case 5: opsize = OS_DOUBLE; break;
case 6: opsize = OS_BYTE; break;
default:
goto undef;
}
if (opsize == OS_DOUBLE) {
tmp32 = tcg_temp_new_i32();
tcg_gen_mov_i32(tmp32, AREG(insn, 0));
switch ((insn >> 3) & 7) {
case 2:
case 3:
break;
case 4:
tcg_gen_addi_i32(tmp32, tmp32, -8);
break;
case 5:
offset = cpu_ldsw_code(env, s->pc);
s->pc += 2;
tcg_gen_addi_i32(tmp32, tmp32, offset);
break;
case 7:
offset = cpu_ldsw_code(env, s->pc);
offset += s->pc - 2;
s->pc += 2;
tcg_gen_addi_i32(tmp32, tmp32, offset);
break;
default:
goto undef;
}
src = gen_load64(s, tmp32);
switch ((insn >> 3) & 7) {
case 3:
tcg_gen_addi_i32(tmp32, tmp32, 8);
tcg_gen_mov_i32(AREG(insn, 0), tmp32);
break;
case 4:
tcg_gen_mov_i32(AREG(insn, 0), tmp32);
break;
}
tcg_temp_free_i32(tmp32);
} else {
SRC_EA(env, tmp32, opsize, 1, NULL);
src = tcg_temp_new_i64();
switch (opsize) {
case OS_LONG:
case OS_WORD:
case OS_BYTE:
gen_helper_i32_to_f64(src, cpu_env, tmp32);
break;
case OS_SINGLE:
gen_helper_f32_to_f64(src, cpu_env, tmp32);
break;
}
}
} else {
/* Source register. */
src = FREG(ext, 10);
}
dest = FREG(ext, 7);
res = tcg_temp_new_i64();
if (opmode != 0x3a)
tcg_gen_mov_f64(res, dest);
round = 1;
set_dest = 1;
switch (opmode) {
case 0: case 0x40: case 0x44: /* fmove */
tcg_gen_mov_f64(res, src);
break;
case 1: /* fint */
gen_helper_iround_f64(res, cpu_env, src);
round = 0;
break;
case 3: /* fintrz */
gen_helper_itrunc_f64(res, cpu_env, src);
round = 0;
break;
case 4: case 0x41: case 0x45: /* fsqrt */
gen_helper_sqrt_f64(res, cpu_env, src);
break;
case 0x18: case 0x58: case 0x5c: /* fabs */
gen_helper_abs_f64(res, src);
break;
case 0x1a: case 0x5a: case 0x5e: /* fneg */
gen_helper_chs_f64(res, src);
break;
case 0x20: case 0x60: case 0x64: /* fdiv */
gen_helper_div_f64(res, cpu_env, res, src);
break;
case 0x22: case 0x62: case 0x66: /* fadd */
gen_helper_add_f64(res, cpu_env, res, src);
break;
case 0x23: case 0x63: case 0x67: /* fmul */
gen_helper_mul_f64(res, cpu_env, res, src);
break;
case 0x28: case 0x68: case 0x6c: /* fsub */
gen_helper_sub_f64(res, cpu_env, res, src);
break;
case 0x38: /* fcmp */
gen_helper_sub_cmp_f64(res, cpu_env, res, src);
set_dest = 0;
round = 0;
break;
case 0x3a: /* ftst */
tcg_gen_mov_f64(res, src);
set_dest = 0;
round = 0;
break;
default:
goto undef;
}
if (ext & (1 << 14)) {
tcg_temp_free_i64(src);
}
if (round) {
if (opmode & 0x40) {
if ((opmode & 0x4) != 0)
round = 0;
} else if ((s->fpcr & M68K_FPCR_PREC) == 0) {
round = 0;
}
}
if (round) {
TCGv tmp = tcg_temp_new_i32();
gen_helper_f64_to_f32(tmp, cpu_env, res);
gen_helper_f32_to_f64(res, cpu_env, tmp);
tcg_temp_free_i32(tmp);
}
tcg_gen_mov_f64(QREG_FP_RESULT, res);
if (set_dest) {
tcg_gen_mov_f64(dest, res);
}
tcg_temp_free_i64(res);
return;
undef:
/* FIXME: Is this right for offset addressing modes? */
s->pc -= 2;
disas_undef_fpu(env, s, insn);
}
DISAS_INSN(fbcc)
{
uint32_t offset;
uint32_t addr;
TCGv flag;
TCGLabel *l1;
addr = s->pc;
offset = cpu_ldsw_code(env, s->pc);
s->pc += 2;
if (insn & (1 << 6)) {
offset = (offset << 16) | cpu_lduw_code(env, s->pc);
s->pc += 2;
}
l1 = gen_new_label();
/* TODO: Raise BSUN exception. */
flag = tcg_temp_new();
gen_helper_compare_f64(flag, cpu_env, QREG_FP_RESULT);
/* Jump to l1 if condition is true. */
switch (insn & 0xf) {
case 0: /* f */
break;
case 1: /* eq (=0) */
tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
break;
case 2: /* ogt (=1) */
tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(1), l1);
break;
case 3: /* oge (=0 or =1) */
tcg_gen_brcond_i32(TCG_COND_LEU, flag, tcg_const_i32(1), l1);
break;
case 4: /* olt (=-1) */
tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(0), l1);
break;
case 5: /* ole (=-1 or =0) */
tcg_gen_brcond_i32(TCG_COND_LE, flag, tcg_const_i32(0), l1);
break;
case 6: /* ogl (=-1 or =1) */
tcg_gen_andi_i32(flag, flag, 1);
tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
break;
case 7: /* or (=2) */
tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(2), l1);
break;
case 8: /* un (<2) */
tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(2), l1);
break;
case 9: /* ueq (=0 or =2) */
tcg_gen_andi_i32(flag, flag, 1);
tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
break;
case 10: /* ugt (>0) */
tcg_gen_brcond_i32(TCG_COND_GT, flag, tcg_const_i32(0), l1);
break;
case 11: /* uge (>=0) */
tcg_gen_brcond_i32(TCG_COND_GE, flag, tcg_const_i32(0), l1);
break;
case 12: /* ult (=-1 or =2) */
tcg_gen_brcond_i32(TCG_COND_GEU, flag, tcg_const_i32(2), l1);
break;
case 13: /* ule (!=1) */
tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(1), l1);
break;
case 14: /* ne (!=0) */
tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
break;
case 15: /* t */
tcg_gen_br(l1);
break;
}
gen_jmp_tb(s, 0, s->pc);
gen_set_label(l1);
gen_jmp_tb(s, 1, addr + offset);
}
DISAS_INSN(frestore)
{
M68kCPU *cpu = m68k_env_get_cpu(env);
/* TODO: Implement frestore. */
cpu_abort(CPU(cpu), "FRESTORE not implemented");
}
DISAS_INSN(fsave)
{
M68kCPU *cpu = m68k_env_get_cpu(env);
/* TODO: Implement fsave. */
cpu_abort(CPU(cpu), "FSAVE not implemented");
}
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 = cpu_lduw_code(env, s->pc);
s->pc += 2;
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);
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);
}
}
}
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)
{
tcg_gen_movi_i32(QREG_CC_X, 0);
tcg_gen_andi_i32(QREG_CC_DEST, QREG_MACSR, 0xf);
s->cc_op = 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_lookup_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)
{
#define INSN(name, opcode, mask, feature) do { \
if (m68k_feature(env, M68K_FEATURE_##feature)) \
register_opcode(disas_##name, 0x##opcode, 0x##mask); \
} while(0)
INSN(undef, 0000, 0000, CF_ISA_A);
INSN(arith_im, 0080, fff8, CF_ISA_A);
INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC);
INSN(bitop_reg, 0100, f1c0, CF_ISA_A);
INSN(bitop_reg, 0140, f1c0, CF_ISA_A);
INSN(bitop_reg, 0180, f1c0, CF_ISA_A);
INSN(bitop_reg, 01c0, f1c0, CF_ISA_A);
INSN(arith_im, 0280, fff8, CF_ISA_A);
INSN(byterev, 02c0, fff8, CF_ISA_APLUSC);
INSN(arith_im, 0480, fff8, CF_ISA_A);
INSN(ff1, 04c0, fff8, CF_ISA_APLUSC);
INSN(arith_im, 0680, fff8, CF_ISA_A);
INSN(bitop_im, 0800, ffc0, CF_ISA_A);
INSN(bitop_im, 0840, ffc0, CF_ISA_A);
INSN(bitop_im, 0880, ffc0, CF_ISA_A);
INSN(bitop_im, 08c0, ffc0, CF_ISA_A);
INSN(arith_im, 0a80, fff8, CF_ISA_A);
INSN(arith_im, 0c00, ff38, CF_ISA_A);
INSN(move, 1000, f000, CF_ISA_A);
INSN(move, 2000, f000, CF_ISA_A);
INSN(move, 3000, f000, CF_ISA_A);
INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC);
INSN(negx, 4080, fff8, CF_ISA_A);
INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
INSN(lea, 41c0, f1c0, CF_ISA_A);
INSN(clr, 4200, ff00, CF_ISA_A);
INSN(undef, 42c0, ffc0, CF_ISA_A);
INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
INSN(neg, 4480, fff8, CF_ISA_A);
INSN(move_to_ccr, 44c0, ffc0, CF_ISA_A);
INSN(not, 4680, fff8, CF_ISA_A);
INSN(move_to_sr, 46c0, ffc0, CF_ISA_A);
INSN(pea, 4840, ffc0, CF_ISA_A);
INSN(swap, 4840, fff8, CF_ISA_A);
INSN(movem, 48c0, fbc0, CF_ISA_A);
INSN(ext, 4880, fff8, CF_ISA_A);
INSN(ext, 48c0, fff8, CF_ISA_A);
INSN(ext, 49c0, fff8, CF_ISA_A);
INSN(tst, 4a00, ff00, CF_ISA_A);
INSN(tas, 4ac0, ffc0, CF_ISA_B);
INSN(halt, 4ac8, ffff, CF_ISA_A);
INSN(pulse, 4acc, ffff, CF_ISA_A);
INSN(illegal, 4afc, ffff, CF_ISA_A);
INSN(mull, 4c00, ffc0, CF_ISA_A);
INSN(divl, 4c40, ffc0, CF_ISA_A);
INSN(sats, 4c80, fff8, CF_ISA_B);
INSN(trap, 4e40, fff0, CF_ISA_A);
INSN(link, 4e50, fff8, CF_ISA_A);
INSN(unlk, 4e58, fff8, CF_ISA_A);
INSN(move_to_usp, 4e60, fff8, USP);
INSN(move_from_usp, 4e68, fff8, USP);
INSN(nop, 4e71, ffff, CF_ISA_A);
INSN(stop, 4e72, ffff, CF_ISA_A);
INSN(rte, 4e73, ffff, CF_ISA_A);
INSN(rts, 4e75, ffff, CF_ISA_A);
INSN(movec, 4e7b, ffff, CF_ISA_A);
INSN(jump, 4e80, ffc0, CF_ISA_A);
INSN(jump, 4ec0, ffc0, CF_ISA_A);
INSN(addsubq, 5180, f1c0, CF_ISA_A);
INSN(scc, 50c0, f0f8, CF_ISA_A);
INSN(addsubq, 5080, f1c0, CF_ISA_A);
INSN(tpf, 51f8, fff8, CF_ISA_A);
/* Branch instructions. */
INSN(branch, 6000, f000, CF_ISA_A);
/* Disable long branch instructions, then add back the ones we want. */
INSN(undef, 60ff, f0ff, CF_ISA_A); /* 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(moveq, 7000, f100, CF_ISA_A);
INSN(mvzs, 7100, f100, CF_ISA_B);
INSN(or, 8000, f000, CF_ISA_A);
INSN(divw, 80c0, f0c0, CF_ISA_A);
INSN(addsub, 9000, f000, CF_ISA_A);
INSN(subx, 9180, f1f8, CF_ISA_A);
INSN(suba, 91c0, f1c0, CF_ISA_A);
INSN(undef_mac, a000, f000, CF_ISA_A);
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(eor, b180, f1c0, CF_ISA_A);
INSN(and, c000, f000, CF_ISA_A);
INSN(mulw, c0c0, f0c0, CF_ISA_A);
INSN(addsub, d000, f000, CF_ISA_A);
INSN(addx, d180, f1f8, CF_ISA_A);
INSN(adda, d1c0, f1c0, CF_ISA_A);
INSN(shift_im, e080, f0f0, CF_ISA_A);
INSN(shift_reg, e0a0, f0f0, CF_ISA_A);
INSN(undef_fpu, f000, f000, CF_ISA_A);
INSN(fpu, f200, ffc0, CF_FPU);
INSN(fbcc, f280, ffc0, CF_FPU);
INSN(frestore, f340, ffc0, CF_FPU);
INSN(fsave, f340, ffc0, CF_FPU);
INSN(intouch, f340, ffc0, CF_ISA_A);
INSN(cpushl, f428, ff38, CF_ISA_A);
INSN(wddata, fb00, ff00, CF_ISA_A);
INSN(wdebug, fbc0, ffc0, CF_ISA_A);
#undef INSN
}
/* ??? Some of this implementation is not exception safe. We should always
write back the result to memory before setting the condition codes. */
static void disas_m68k_insn(CPUM68KState * env, DisasContext *s)
{
uint16_t insn;
insn = cpu_lduw_code(env, s->pc);
s->pc += 2;
opcode_table[insn](env, s, insn);
}
/* generate intermediate code for basic block 'tb'. */
void gen_intermediate_code(CPUM68KState *env, TranslationBlock *tb)
{
M68kCPU *cpu = m68k_env_get_cpu(env);
CPUState *cs = CPU(cpu);
DisasContext dc1, *dc = &dc1;
target_ulong pc_start;
int pc_offset;
int num_insns;
int max_insns;
/* generate intermediate code */
pc_start = tb->pc;
dc->tb = tb;
dc->env = env;
dc->is_jmp = DISAS_NEXT;
dc->pc = pc_start;
dc->cc_op = CC_OP_DYNAMIC;
dc->singlestep_enabled = cs->singlestep_enabled;
dc->fpcr = env->fpcr;
dc->user = (env->sr & SR_S) == 0;
dc->done_mac = 0;
num_insns = 0;
max_insns = tb->cflags & CF_COUNT_MASK;
if (max_insns == 0) {
max_insns = CF_COUNT_MASK;
}
if (max_insns > TCG_MAX_INSNS) {
max_insns = TCG_MAX_INSNS;
}
gen_tb_start(tb);
do {
pc_offset = dc->pc - pc_start;
gen_throws_exception = NULL;
tcg_gen_insn_start(dc->pc);
num_insns++;
if (unlikely(cpu_breakpoint_test(cs, dc->pc, BP_ANY))) {
gen_exception(dc, dc->pc, EXCP_DEBUG);
dc->is_jmp = DISAS_JUMP;
/* 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->pc += 2;
break;
}
if (num_insns == max_insns && (tb->cflags & CF_LAST_IO)) {
gen_io_start();
}
dc->insn_pc = dc->pc;
disas_m68k_insn(env, dc);
} while (!dc->is_jmp && !tcg_op_buf_full() &&
!cs->singlestep_enabled &&
!singlestep &&
(pc_offset) < (TARGET_PAGE_SIZE - 32) &&
num_insns < max_insns);
if (tb->cflags & CF_LAST_IO)
gen_io_end();
if (unlikely(cs->singlestep_enabled)) {
/* Make sure the pc is updated, and raise a debug exception. */
if (!dc->is_jmp) {
gen_flush_cc_op(dc);
tcg_gen_movi_i32(QREG_PC, dc->pc);
}
gen_helper_raise_exception(cpu_env, tcg_const_i32(EXCP_DEBUG));
} else {
switch(dc->is_jmp) {
case DISAS_NEXT:
gen_flush_cc_op(dc);
gen_jmp_tb(dc, 0, dc->pc);
break;
default:
case DISAS_JUMP:
case DISAS_UPDATE:
gen_flush_cc_op(dc);
/* indicate that the hash table must be used to find the next TB */
tcg_gen_exit_tb(0);
break;
case DISAS_TB_JUMP:
/* nothing more to generate */
break;
}
}
gen_tb_end(tb, num_insns);
#ifdef DEBUG_DISAS
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
qemu_log("----------------\n");
qemu_log("IN: %s\n", lookup_symbol(pc_start));
log_target_disas(cs, pc_start, dc->pc - pc_start, 0);
qemu_log("\n");
}
#endif
tb->size = dc->pc - pc_start;
tb->icount = num_insns;
}
void m68k_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
int flags)
{
M68kCPU *cpu = M68K_CPU(cs);
CPUM68KState *env = &cpu->env;
int i;
uint16_t sr;
CPU_DoubleU u;
for (i = 0; i < 8; i++)
{
u.d = env->fregs[i];
cpu_fprintf (f, "D%d = %08x A%d = %08x F%d = %08x%08x (%12g)\n",
i, env->dregs[i], i, env->aregs[i],
i, u.l.upper, u.l.lower, *(double *)&u.d);
}
cpu_fprintf (f, "PC = %08x ", env->pc);
sr = env->sr;
cpu_fprintf (f, "SR = %04x %c%c%c%c%c ", sr, (sr & 0x10) ? 'X' : '-',
(sr & CCF_N) ? 'N' : '-', (sr & CCF_Z) ? 'Z' : '-',
(sr & CCF_V) ? 'V' : '-', (sr & CCF_C) ? 'C' : '-');
cpu_fprintf (f, "FPRESULT = %12g\n", *(double *)&env->fp_result);
}
void restore_state_to_opc(CPUM68KState *env, TranslationBlock *tb,
target_ulong *data)
{
env->pc = data[0];
}
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