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qemu / qemu / a87eec766d99c33fc49ecc6dbce40f304168ac3f / . / target-m68k / translate.c
blob: e763195f8673babf66642a1b997393e476bc2085 [file] [log] [blame]
/*
* 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 "cpu.h"
#include "disas/disas.h"
#include "tcg-op.h"
#include "qemu/log.h"
#include "helpers.h"
#define GEN_HELPER 1
#include "helpers.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_ptr 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;
#define DEFO32(name, offset) QREG_##name = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUM68KState, offset), #name);
#define DEFO64(name, offset) QREG_##name = tcg_global_mem_new_i64(TCG_AREG0, offsetof(CPUM68KState, offset), #name);
#define DEFF64(name, offset) DEFO64(name, offset)
#include "qregs.def"
#undef DEFO32
#undef DEFO64
#undef DEFF64
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
p = cpu_reg_names;
for (i = 0; i < 8; i++) {
sprintf(p, "D%d", i);
cpu_dregs[i] = tcg_global_mem_new(TCG_AREG0,
offsetof(CPUM68KState, dregs[i]), p);
p += 3;
sprintf(p, "A%d", i);
cpu_aregs[i] = tcg_global_mem_new(TCG_AREG0,
offsetof(CPUM68KState, aregs[i]), p);
p += 3;
sprintf(p, "F%d", i);
cpu_fregs[i] = tcg_global_mem_new_i64(TCG_AREG0,
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(TCG_AREG0,
offsetof(CPUM68KState, macc[i]), p);
p += 5;
}
NULL_QREG = tcg_global_mem_new(TCG_AREG0, -4, "NULL");
store_dummy = tcg_global_mem_new(TCG_AREG0, -8, "NULL");
#define GEN_HELPER 2
#include "helpers.h"
}
static inline void qemu_assert(int cond, const char *msg)
{
if (!cond) {
fprintf (stderr, "badness: %s\n", msg);
abort();
}
}
/* 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;
int is_mem;
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);
s->is_mem = 1;
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:
qemu_assert(0, "bad load size");
}
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);
s->is_mem = 1;
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);
s->is_mem = 1;
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:
qemu_assert(0, "bad store size");
}
gen_throws_exception = gen_last_qop;
}
static inline void gen_store64(DisasContext *s, TCGv addr, TCGv_i64 val)
{
int index = IS_USER(s);
s->is_mem = 1;
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, int opsize,
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:
qemu_assert(0, "bad operand size");
return 0;
}
}
/* 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:
qemu_assert(0, "Bad operand size");
break;
}
}
/* 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:
qemu_assert(0, "Bad operand size");
}
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, opsize, 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, opsize, 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 ito/from 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:
qemu_assert(0, "Bad immediate operand");
}
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, int 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)
{
int 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)
/* Generate a jump to an immediate address. */
static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest)
{
TranslationBlock *tb;
tb = s->tb;
if (unlikely(s->singlestep_enabled)) {
gen_exception(s, dest, EXCP_DEBUG);
} else if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) ||
(s->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
tcg_gen_goto_tb(n);
tcg_gen_movi_i32(QREG_PC, dest);
tcg_gen_exit_tb((tcg_target_long)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)
{
gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED);
cpu_abort(env, "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;
int 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;
}
/* TODO: Implement USP. */
gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
}
DISAS_INSN(move_to_usp)
{
if (IS_USER(s)) {
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
return;
}
/* TODO: Implement USP. */
gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
}
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(QREG_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)
{
if (IS_USER(s)) {
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
return;
}
/* TODO: Implement wdebug. */
qemu_assert(0, "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) {
s->is_mem = 1;
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;
int 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)
{
/* TODO: Implement frestore. */
qemu_assert(0, "FRESTORE not implemented");
}
DISAS_INSN(fsave)
{
/* TODO: Implement fsave. */
qemu_assert(0, "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_trunc_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;
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
tcg_gen_debug_insn_start(s->pc);
}
insn = cpu_lduw_code(env, s->pc);
s->pc += 2;
opcode_table[insn](env, s, insn);
}
/* generate intermediate code for basic block 'tb'. */
static inline void
gen_intermediate_code_internal(CPUM68KState *env, TranslationBlock *tb,
int search_pc)
{
DisasContext dc1, *dc = &dc1;
uint16_t *gen_opc_end;
CPUBreakpoint *bp;
int j, lj;
target_ulong pc_start;
int pc_offset;
int num_insns;
int max_insns;
/* generate intermediate code */
pc_start = tb->pc;
dc->tb = tb;
gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE;
dc->env = env;
dc->is_jmp = DISAS_NEXT;
dc->pc = pc_start;
dc->cc_op = CC_OP_DYNAMIC;
dc->singlestep_enabled = env->singlestep_enabled;
dc->fpcr = env->fpcr;
dc->user = (env->sr & SR_S) == 0;
dc->is_mem = 0;
dc->done_mac = 0;
lj = -1;
num_insns = 0;
max_insns = tb->cflags & CF_COUNT_MASK;
if (max_insns == 0)
max_insns = CF_COUNT_MASK;
gen_icount_start();
do {
pc_offset = dc->pc - pc_start;
gen_throws_exception = NULL;
if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
if (bp->pc == dc->pc) {
gen_exception(dc, dc->pc, EXCP_DEBUG);
dc->is_jmp = DISAS_JUMP;
break;
}
}
if (dc->is_jmp)
break;
}
if (search_pc) {
j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
if (lj < j) {
lj++;
while (lj < j)
tcg_ctx.gen_opc_instr_start[lj++] = 0;
}
tcg_ctx.gen_opc_pc[lj] = dc->pc;
tcg_ctx.gen_opc_instr_start[lj] = 1;
tcg_ctx.gen_opc_icount[lj] = num_insns;
}
if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
gen_io_start();
dc->insn_pc = dc->pc;
disas_m68k_insn(env, dc);
num_insns++;
} while (!dc->is_jmp && tcg_ctx.gen_opc_ptr < gen_opc_end &&
!env->singlestep_enabled &&
!singlestep &&
(pc_offset) < (TARGET_PAGE_SIZE - 32) &&
num_insns < max_insns);
if (tb->cflags & CF_LAST_IO)
gen_io_end();
if (unlikely(env->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_icount_end(tb, num_insns);
*tcg_ctx.gen_opc_ptr = INDEX_op_end;
#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(env, pc_start, dc->pc - pc_start, 0);
qemu_log("\n");
}
#endif
if (search_pc) {
j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
lj++;
while (lj <= j)
tcg_ctx.gen_opc_instr_start[lj++] = 0;
} else {
tb->size = dc->pc - pc_start;
tb->icount = num_insns;
}
//optimize_flags();
//expand_target_qops();
}
void gen_intermediate_code(CPUM68KState *env, TranslationBlock *tb)
{
gen_intermediate_code_internal(env, tb, 0);
}
void gen_intermediate_code_pc(CPUM68KState *env, TranslationBlock *tb)
{
gen_intermediate_code_internal(env, tb, 1);
}
void cpu_dump_state(CPUM68KState *env, FILE *f, fprintf_function cpu_fprintf,
int flags)
{
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, int pc_pos)
{
env->pc = tcg_ctx.gen_opc_pc[pc_pos];
}