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xemu/target/m68k/translate.c
Alex Bennée 24f91e81b6 target/*/cpu.h: remove softfloat.h 
As cpu.h is another typically widely included file which doesn't need
full access to the softfloat API we can remove the includes from here
as well. Where they do need types it's typically for float_status and
the rounding modes so we move that to softfloat-types.h as well.

As a result of not having softfloat in every cpu.h call we now need to
add it to various helpers that do need the full softfloat.h
definitions.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[For PPC parts]
Acked-by: David Gibson <david@gibson.dropbear.id.au>
2018-02-21 10:20:24 +00:00

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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 "exec/exec-all.h"
#include "tcg-op.h"
#include "qemu/log.h"
#include "exec/cpu_ldst.h"
#include "exec/translator.h"
#include "exec/helper-proto.h"
#include "exec/helper-gen.h"
#include "trace-tcg.h"
#include "exec/log.h"
#include "fpu/softfloat.h"
//#define DEBUG_DISPATCH 1
#define DEFO32(name, offset) static TCGv QREG_##name;
#define DEFO64(name, offset) static TCGv_i64 QREG_##name;
#include "qregs.def"
#undef DEFO32
#undef DEFO64
static TCGv_i32 cpu_halted;
static TCGv_i32 cpu_exception_index;
static char cpu_reg_names[2 * 8 * 3 + 5 * 4];
static TCGv cpu_dregs[8];
static TCGv cpu_aregs[8];
static TCGv_i64 cpu_macc[4];
#define REG(insn, pos) (((insn) >> (pos)) & 7)
#define DREG(insn, pos) cpu_dregs[REG(insn, pos)]
#define AREG(insn, pos) get_areg(s, REG(insn, pos))
#define MACREG(acc) cpu_macc[acc]
#define QREG_SP get_areg(s, 7)
static TCGv NULL_QREG;
#define IS_NULL_QREG(t) (t == NULL_QREG)
/* Used to distinguish stores from bad addressing modes. */
static TCGv store_dummy;
#include "exec/gen-icount.h"
void m68k_tcg_init(void)
{
char *p;
int i;
#define DEFO32(name, offset) \
QREG_##name = tcg_global_mem_new_i32(cpu_env, \
offsetof(CPUM68KState, offset), #name);
#define DEFO64(name, offset) \
QREG_##name = tcg_global_mem_new_i64(cpu_env, \
offsetof(CPUM68KState, offset), #name);
#include "qregs.def"
#undef DEFO32
#undef DEFO64
cpu_halted = tcg_global_mem_new_i32(cpu_env,
-offsetof(M68kCPU, env) +
offsetof(CPUState, halted), "HALTED");
cpu_exception_index = tcg_global_mem_new_i32(cpu_env,
-offsetof(M68kCPU, env) +
offsetof(CPUState, exception_index),
"EXCEPTION");
p = cpu_reg_names;
for (i = 0; i < 8; i++) {
sprintf(p, "D%d", i);
cpu_dregs[i] = tcg_global_mem_new(cpu_env,
offsetof(CPUM68KState, dregs[i]), p);
p += 3;
sprintf(p, "A%d", i);
cpu_aregs[i] = tcg_global_mem_new(cpu_env,
offsetof(CPUM68KState, aregs[i]), p);
p += 3;
}
for (i = 0; i < 4; i++) {
sprintf(p, "ACC%d", i);
cpu_macc[i] = tcg_global_mem_new_i64(cpu_env,
offsetof(CPUM68KState, macc[i]), p);
p += 5;
}
NULL_QREG = tcg_global_mem_new(cpu_env, -4, "NULL");
store_dummy = tcg_global_mem_new(cpu_env, -8, "NULL");
}
/* internal defines */
typedef struct DisasContext {
CPUM68KState *env;
target_ulong insn_pc; /* Start of the current instruction. */
target_ulong pc;
int is_jmp;
CCOp cc_op; /* Current CC operation */
int cc_op_synced;
struct TranslationBlock *tb;
int singlestep_enabled;
TCGv_i64 mactmp;
int done_mac;
int writeback_mask;
TCGv writeback[8];
} DisasContext;
static TCGv get_areg(DisasContext *s, unsigned regno)
{
if (s->writeback_mask & (1 << regno)) {
return s->writeback[regno];
} else {
return cpu_aregs[regno];
}
}
static void delay_set_areg(DisasContext *s, unsigned regno,
TCGv val, bool give_temp)
{
if (s->writeback_mask & (1 << regno)) {
if (give_temp) {
tcg_temp_free(s->writeback[regno]);
s->writeback[regno] = val;
} else {
tcg_gen_mov_i32(s->writeback[regno], val);
}
} else {
s->writeback_mask |= 1 << regno;
if (give_temp) {
s->writeback[regno] = val;
} else {
TCGv tmp = tcg_temp_new();
s->writeback[regno] = tmp;
tcg_gen_mov_i32(tmp, val);
}
}
}
static void do_writebacks(DisasContext *s)
{
unsigned mask = s->writeback_mask;
if (mask) {
s->writeback_mask = 0;
do {
unsigned regno = ctz32(mask);
tcg_gen_mov_i32(cpu_aregs[regno], s->writeback[regno]);
tcg_temp_free(s->writeback[regno]);
mask &= mask - 1;
} while (mask);
}
}
/* is_jmp field values */
#define DISAS_JUMP DISAS_TARGET_0 /* only pc was modified dynamically */
#define DISAS_UPDATE DISAS_TARGET_1 /* cpu state was modified dynamically */
#define DISAS_TB_JUMP DISAS_TARGET_2 /* only pc was modified statically */
#define DISAS_JUMP_NEXT DISAS_TARGET_3
#if defined(CONFIG_USER_ONLY)
#define IS_USER(s) 1
#else
#define IS_USER(s) (!(s->tb->flags & TB_FLAGS_MSR_S))
#define SFC_INDEX(s) ((s->tb->flags & TB_FLAGS_SFC_S) ? \
MMU_KERNEL_IDX : MMU_USER_IDX)
#define DFC_INDEX(s) ((s->tb->flags & TB_FLAGS_DFC_S) ? \
MMU_KERNEL_IDX : MMU_USER_IDX)
#endif
typedef void (*disas_proc)(CPUM68KState *env, DisasContext *s, uint16_t insn);
#ifdef DEBUG_DISPATCH
#define DISAS_INSN(name) \
static void real_disas_##name(CPUM68KState *env, DisasContext *s, \
uint16_t insn); \
static void disas_##name(CPUM68KState *env, DisasContext *s, \
uint16_t insn) \
{ \
qemu_log("Dispatch " #name "\n"); \
real_disas_##name(env, s, insn); \
} \
static void real_disas_##name(CPUM68KState *env, DisasContext *s, \
uint16_t insn)
#else
#define DISAS_INSN(name) \
static void disas_##name(CPUM68KState *env, DisasContext *s, \
uint16_t insn)
#endif
static const uint8_t cc_op_live[CC_OP_NB] = {
[CC_OP_DYNAMIC] = CCF_C | CCF_V | CCF_Z | CCF_N | CCF_X,
[CC_OP_FLAGS] = CCF_C | CCF_V | CCF_Z | CCF_N | CCF_X,
[CC_OP_ADDB ... CC_OP_ADDL] = CCF_X | CCF_N | CCF_V,
[CC_OP_SUBB ... CC_OP_SUBL] = CCF_X | CCF_N | CCF_V,
[CC_OP_CMPB ... CC_OP_CMPL] = CCF_X | CCF_N | CCF_V,
[CC_OP_LOGIC] = CCF_X | CCF_N
};
static void set_cc_op(DisasContext *s, CCOp op)
{
CCOp old_op = s->cc_op;
int dead;
if (old_op == op) {
return;
}
s->cc_op = op;
s->cc_op_synced = 0;
/* Discard CC computation that will no longer be used.
Note that X and N are never dead. */
dead = cc_op_live[old_op] & ~cc_op_live[op];
if (dead & CCF_C) {
tcg_gen_discard_i32(QREG_CC_C);
}
if (dead & CCF_Z) {
tcg_gen_discard_i32(QREG_CC_Z);
}
if (dead & CCF_V) {
tcg_gen_discard_i32(QREG_CC_V);
}
}
/* Update the CPU env CC_OP state. */
static void update_cc_op(DisasContext *s)
{
if (!s->cc_op_synced) {
s->cc_op_synced = 1;
tcg_gen_movi_i32(QREG_CC_OP, s->cc_op);
}
}
/* Generate a jump to an immediate address. */
static void gen_jmp_im(DisasContext *s, uint32_t dest)
{
update_cc_op(s);
tcg_gen_movi_i32(QREG_PC, dest);
s->is_jmp = DISAS_JUMP;
}
/* Generate a jump to the address in qreg DEST. */
static void gen_jmp(DisasContext *s, TCGv dest)
{
update_cc_op(s);
tcg_gen_mov_i32(QREG_PC, dest);
s->is_jmp = DISAS_JUMP;
}
static void gen_raise_exception(int nr)
{
TCGv_i32 tmp = tcg_const_i32(nr);
gen_helper_raise_exception(cpu_env, tmp);
tcg_temp_free_i32(tmp);
}
static void gen_exception(DisasContext *s, uint32_t where, int nr)
{
gen_jmp_im(s, where);
gen_raise_exception(nr);
}
static inline void gen_addr_fault(DisasContext *s)
{
gen_exception(s, s->insn_pc, EXCP_ADDRESS);
}
/* Generate a load from the specified address. Narrow values are
sign extended to full register width. */
static inline TCGv gen_load(DisasContext *s, int opsize, TCGv addr,
int sign, int index)
{
TCGv tmp;
tmp = tcg_temp_new_i32();
switch(opsize) {
case OS_BYTE:
if (sign)
tcg_gen_qemu_ld8s(tmp, addr, index);
else
tcg_gen_qemu_ld8u(tmp, addr, index);
break;
case OS_WORD:
if (sign)
tcg_gen_qemu_ld16s(tmp, addr, index);
else
tcg_gen_qemu_ld16u(tmp, addr, index);
break;
case OS_LONG:
tcg_gen_qemu_ld32u(tmp, addr, index);
break;
default:
g_assert_not_reached();
}
return tmp;
}
/* Generate a store. */
static inline void gen_store(DisasContext *s, int opsize, TCGv addr, TCGv val,
int index)
{
switch(opsize) {
case OS_BYTE:
tcg_gen_qemu_st8(val, addr, index);
break;
case OS_WORD:
tcg_gen_qemu_st16(val, addr, index);
break;
case OS_LONG:
tcg_gen_qemu_st32(val, addr, index);
break;
default:
g_assert_not_reached();
}
}
typedef enum {
EA_STORE,
EA_LOADU,
EA_LOADS
} ea_what;
/* Generate an unsigned load if VAL is 0 a signed load if val is -1,
otherwise generate a store. */
static TCGv gen_ldst(DisasContext *s, int opsize, TCGv addr, TCGv val,
ea_what what, int index)
{
if (what == EA_STORE) {
gen_store(s, opsize, addr, val, index);
return store_dummy;
} else {
return gen_load(s, opsize, addr, what == EA_LOADS, index);
}
}
/* Read a 16-bit immediate constant */
static inline uint16_t read_im16(CPUM68KState *env, DisasContext *s)
{
uint16_t im;
im = cpu_lduw_code(env, s->pc);
s->pc += 2;
return im;
}
/* Read an 8-bit immediate constant */
static inline uint8_t read_im8(CPUM68KState *env, DisasContext *s)
{
return read_im16(env, s);
}
/* Read a 32-bit immediate constant. */
static inline uint32_t read_im32(CPUM68KState *env, DisasContext *s)
{
uint32_t im;
im = read_im16(env, s) << 16;
im |= 0xffff & read_im16(env, s);
return im;
}
/* Read a 64-bit immediate constant. */
static inline uint64_t read_im64(CPUM68KState *env, DisasContext *s)
{
uint64_t im;
im = (uint64_t)read_im32(env, s) << 32;
im |= (uint64_t)read_im32(env, s);
return im;
}
/* Calculate and address index. */
static TCGv gen_addr_index(DisasContext *s, uint16_t ext, TCGv tmp)
{
TCGv add;
int scale;
add = (ext & 0x8000) ? AREG(ext, 12) : DREG(ext, 12);
if ((ext & 0x800) == 0) {
tcg_gen_ext16s_i32(tmp, add);
add = tmp;
}
scale = (ext >> 9) & 3;
if (scale != 0) {
tcg_gen_shli_i32(tmp, add, scale);
add = tmp;
}
return add;
}
/* Handle a base + index + displacement effective 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 = read_im16(env, s);
if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX))
return NULL_QREG;
if (m68k_feature(s->env, M68K_FEATURE_M68000) &&
!m68k_feature(s->env, M68K_FEATURE_SCALED_INDEX)) {
ext &= ~(3 << 9);
}
if (ext & 0x100) {
/* full extension word format */
if (!m68k_feature(s->env, M68K_FEATURE_EXT_FULL))
return NULL_QREG;
if ((ext & 0x30) > 0x10) {
/* base displacement */
if ((ext & 0x30) == 0x20) {
bd = (int16_t)read_im16(env, s);
} else {
bd = read_im32(env, s);
}
} else {
bd = 0;
}
tmp = tcg_temp_new();
if ((ext & 0x44) == 0) {
/* pre-index */
add = gen_addr_index(s, ext, tmp);
} else {
add = NULL_QREG;
}
if ((ext & 0x80) == 0) {
/* base not suppressed */
if (IS_NULL_QREG(base)) {
base = 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, IS_USER(s));
if ((ext & 0x44) == 4) {
add = gen_addr_index(s, ext, tmp);
tcg_gen_add_i32(tmp, add, base);
add = tmp;
} else {
add = base;
}
if ((ext & 3) > 1) {
/* outer displacement */
if ((ext & 3) == 2) {
od = (int16_t)read_im16(env, s);
} else {
od = read_im32(env, s);
}
} else {
od = 0;
}
if (od != 0) {
tcg_gen_addi_i32(tmp, add, od);
add = tmp;
}
}
} else {
/* brief extension word format */
tmp = tcg_temp_new();
add = gen_addr_index(s, ext, tmp);
if (!IS_NULL_QREG(base)) {
tcg_gen_add_i32(tmp, add, base);
if ((int8_t)ext)
tcg_gen_addi_i32(tmp, tmp, (int8_t)ext);
} else {
tcg_gen_addi_i32(tmp, add, offset + (int8_t)ext);
}
add = tmp;
}
return add;
}
/* Sign or zero extend a value. */
static inline void gen_ext(TCGv res, TCGv val, int opsize, int sign)
{
switch (opsize) {
case OS_BYTE:
if (sign) {
tcg_gen_ext8s_i32(res, val);
} else {
tcg_gen_ext8u_i32(res, val);
}
break;
case OS_WORD:
if (sign) {
tcg_gen_ext16s_i32(res, val);
} else {
tcg_gen_ext16u_i32(res, val);
}
break;
case OS_LONG:
tcg_gen_mov_i32(res, val);
break;
default:
g_assert_not_reached();
}
}
/* Evaluate all the CC flags. */
static void gen_flush_flags(DisasContext *s)
{
TCGv t0, t1;
switch (s->cc_op) {
case CC_OP_FLAGS:
return;
case CC_OP_ADDB:
case CC_OP_ADDW:
case CC_OP_ADDL:
tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
/* Compute signed overflow for addition. */
t0 = tcg_temp_new();
t1 = tcg_temp_new();
tcg_gen_sub_i32(t0, QREG_CC_N, QREG_CC_V);
gen_ext(t0, t0, s->cc_op - CC_OP_ADDB, 1);
tcg_gen_xor_i32(t1, QREG_CC_N, QREG_CC_V);
tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0);
tcg_temp_free(t0);
tcg_gen_andc_i32(QREG_CC_V, t1, QREG_CC_V);
tcg_temp_free(t1);
break;
case CC_OP_SUBB:
case CC_OP_SUBW:
case CC_OP_SUBL:
tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
/* Compute signed overflow for subtraction. */
t0 = tcg_temp_new();
t1 = tcg_temp_new();
tcg_gen_add_i32(t0, QREG_CC_N, QREG_CC_V);
gen_ext(t0, t0, s->cc_op - CC_OP_SUBB, 1);
tcg_gen_xor_i32(t1, QREG_CC_N, t0);
tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0);
tcg_temp_free(t0);
tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t1);
tcg_temp_free(t1);
break;
case CC_OP_CMPB:
case CC_OP_CMPW:
case CC_OP_CMPL:
tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_C, QREG_CC_N, QREG_CC_V);
tcg_gen_sub_i32(QREG_CC_Z, QREG_CC_N, QREG_CC_V);
gen_ext(QREG_CC_Z, QREG_CC_Z, s->cc_op - CC_OP_CMPB, 1);
/* Compute signed overflow for subtraction. */
t0 = tcg_temp_new();
tcg_gen_xor_i32(t0, QREG_CC_Z, QREG_CC_N);
tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, QREG_CC_N);
tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t0);
tcg_temp_free(t0);
tcg_gen_mov_i32(QREG_CC_N, QREG_CC_Z);
break;
case CC_OP_LOGIC:
tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
tcg_gen_movi_i32(QREG_CC_C, 0);
tcg_gen_movi_i32(QREG_CC_V, 0);
break;
case CC_OP_DYNAMIC:
gen_helper_flush_flags(cpu_env, QREG_CC_OP);
s->cc_op_synced = 1;
break;
default:
t0 = tcg_const_i32(s->cc_op);
gen_helper_flush_flags(cpu_env, t0);
tcg_temp_free(t0);
s->cc_op_synced = 1;
break;
}
/* Note that flush_flags also assigned to env->cc_op. */
s->cc_op = CC_OP_FLAGS;
}
static inline TCGv gen_extend(TCGv val, int opsize, int sign)
{
TCGv tmp;
if (opsize == OS_LONG) {
tmp = val;
} else {
tmp = tcg_temp_new();
gen_ext(tmp, val, opsize, sign);
}
return tmp;
}
static void gen_logic_cc(DisasContext *s, TCGv val, int opsize)
{
gen_ext(QREG_CC_N, val, opsize, 1);
set_cc_op(s, CC_OP_LOGIC);
}
static void gen_update_cc_cmp(DisasContext *s, TCGv dest, TCGv src, int opsize)
{
tcg_gen_mov_i32(QREG_CC_N, dest);
tcg_gen_mov_i32(QREG_CC_V, src);
set_cc_op(s, CC_OP_CMPB + opsize);
}
static void gen_update_cc_add(TCGv dest, TCGv src, int opsize)
{
gen_ext(QREG_CC_N, dest, opsize, 1);
tcg_gen_mov_i32(QREG_CC_V, src);
}
static inline int opsize_bytes(int opsize)
{
switch (opsize) {
case OS_BYTE: return 1;
case OS_WORD: return 2;
case OS_LONG: return 4;
case OS_SINGLE: return 4;
case OS_DOUBLE: return 8;
case OS_EXTENDED: return 12;
case OS_PACKED: return 12;
default:
g_assert_not_reached();
}
}
static inline int insn_opsize(int insn)
{
switch ((insn >> 6) & 3) {
case 0: return OS_BYTE;
case 1: return OS_WORD;
case 2: return OS_LONG;
default:
g_assert_not_reached();
}
}
static inline int ext_opsize(int ext, int pos)
{
switch ((ext >> pos) & 7) {
case 0: return OS_LONG;
case 1: return OS_SINGLE;
case 2: return OS_EXTENDED;
case 3: return OS_PACKED;
case 4: return OS_WORD;
case 5: return OS_DOUBLE;
case 6: return OS_BYTE;
default:
g_assert_not_reached();
}
}
/* Assign value to a register. If the width is less than the register width
only the low part of the register is set. */
static void gen_partset_reg(int opsize, TCGv reg, TCGv val)
{
TCGv tmp;
switch (opsize) {
case OS_BYTE:
tcg_gen_andi_i32(reg, reg, 0xffffff00);
tmp = tcg_temp_new();
tcg_gen_ext8u_i32(tmp, val);
tcg_gen_or_i32(reg, reg, tmp);
tcg_temp_free(tmp);
break;
case OS_WORD:
tcg_gen_andi_i32(reg, reg, 0xffff0000);
tmp = tcg_temp_new();
tcg_gen_ext16u_i32(tmp, val);
tcg_gen_or_i32(reg, reg, tmp);
tcg_temp_free(tmp);
break;
case OS_LONG:
case OS_SINGLE:
tcg_gen_mov_i32(reg, val);
break;
default:
g_assert_not_reached();
}
}
/* Generate code for an "effective address". Does not adjust the base
register for autoincrement addressing modes. */
static TCGv gen_lea_mode(CPUM68KState *env, DisasContext *s,
int mode, int reg0, int opsize)
{
TCGv reg;
TCGv tmp;
uint16_t ext;
uint32_t offset;
switch (mode) {
case 0: /* Data register direct. */
case 1: /* Address register direct. */
return NULL_QREG;
case 3: /* Indirect postincrement. */
if (opsize == OS_UNSIZED) {
return NULL_QREG;
}
/* fallthru */
case 2: /* Indirect register */
return get_areg(s, reg0);
case 4: /* Indirect predecrememnt. */
if (opsize == OS_UNSIZED) {
return NULL_QREG;
}
reg = get_areg(s, reg0);
tmp = tcg_temp_new();
if (reg0 == 7 && opsize == OS_BYTE &&
m68k_feature(s->env, M68K_FEATURE_M68000)) {
tcg_gen_subi_i32(tmp, reg, 2);
} else {
tcg_gen_subi_i32(tmp, reg, opsize_bytes(opsize));
}
return tmp;
case 5: /* Indirect displacement. */
reg = get_areg(s, reg0);
tmp = tcg_temp_new();
ext = read_im16(env, s);
tcg_gen_addi_i32(tmp, reg, (int16_t)ext);
return tmp;
case 6: /* Indirect index + displacement. */
reg = get_areg(s, reg0);
return gen_lea_indexed(env, s, reg);
case 7: /* Other */
switch (reg0) {
case 0: /* Absolute short. */
offset = (int16_t)read_im16(env, s);
return 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 += (int16_t)read_im16(env, s);
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;
}
static TCGv gen_lea(CPUM68KState *env, DisasContext *s, uint16_t insn,
int opsize)
{
int mode = extract32(insn, 3, 3);
int reg0 = REG(insn, 0);
return gen_lea_mode(env, s, mode, reg0, opsize);
}
/* Generate code to load/store a value from/into an EA. If WHAT > 0 this is
a write otherwise it is a read (0 == sign extend, -1 == zero extend).
ADDRP is non-null for readwrite operands. */
static TCGv gen_ea_mode(CPUM68KState *env, DisasContext *s, int mode, int reg0,
int opsize, TCGv val, TCGv *addrp, ea_what what,
int index)
{
TCGv reg, tmp, result;
int32_t offset;
switch (mode) {
case 0: /* Data register direct. */
reg = cpu_dregs[reg0];
if (what == EA_STORE) {
gen_partset_reg(opsize, reg, val);
return store_dummy;
} else {
return gen_extend(reg, opsize, what == EA_LOADS);
}
case 1: /* Address register direct. */
reg = get_areg(s, reg0);
if (what == EA_STORE) {
tcg_gen_mov_i32(reg, val);
return store_dummy;
} else {
return gen_extend(reg, opsize, what == EA_LOADS);
}
case 2: /* Indirect register */
reg = get_areg(s, reg0);
return gen_ldst(s, opsize, reg, val, what, index);
case 3: /* Indirect postincrement. */
reg = get_areg(s, reg0);
result = gen_ldst(s, opsize, reg, val, what, index);
if (what == EA_STORE || !addrp) {
TCGv tmp = tcg_temp_new();
if (reg0 == 7 && opsize == OS_BYTE &&
m68k_feature(s->env, M68K_FEATURE_M68000)) {
tcg_gen_addi_i32(tmp, reg, 2);
} else {
tcg_gen_addi_i32(tmp, reg, opsize_bytes(opsize));
}
delay_set_areg(s, reg0, tmp, true);
}
return result;
case 4: /* Indirect predecrememnt. */
if (addrp && what == EA_STORE) {
tmp = *addrp;
} else {
tmp = gen_lea_mode(env, s, mode, reg0, opsize);
if (IS_NULL_QREG(tmp)) {
return tmp;
}
if (addrp) {
*addrp = tmp;
}
}
result = gen_ldst(s, opsize, tmp, val, what, index);
if (what == EA_STORE || !addrp) {
delay_set_areg(s, reg0, tmp, false);
}
return result;
case 5: /* Indirect displacement. */
case 6: /* Indirect index + displacement. */
do_indirect:
if (addrp && what == EA_STORE) {
tmp = *addrp;
} else {
tmp = gen_lea_mode(env, s, mode, reg0, opsize);
if (IS_NULL_QREG(tmp)) {
return tmp;
}
if (addrp) {
*addrp = tmp;
}
}
return gen_ldst(s, opsize, tmp, val, what, index);
case 7: /* Other */
switch (reg0) {
case 0: /* Absolute short. */
case 1: /* Absolute long. */
case 2: /* pc displacement */
case 3: /* pc index+displacement. */
goto do_indirect;
case 4: /* Immediate. */
/* Sign extend values for consistency. */
switch (opsize) {
case OS_BYTE:
if (what == EA_LOADS) {
offset = (int8_t)read_im8(env, s);
} else {
offset = read_im8(env, s);
}
break;
case OS_WORD:
if (what == EA_LOADS) {
offset = (int16_t)read_im16(env, s);
} else {
offset = read_im16(env, s);
}
break;
case OS_LONG:
offset = read_im32(env, s);
break;
default:
g_assert_not_reached();
}
return tcg_const_i32(offset);
default:
return NULL_QREG;
}
}
/* Should never happen. */
return NULL_QREG;
}
static TCGv gen_ea(CPUM68KState *env, DisasContext *s, uint16_t insn,
int opsize, TCGv val, TCGv *addrp, ea_what what, int index)
{
int mode = extract32(insn, 3, 3);
int reg0 = REG(insn, 0);
return gen_ea_mode(env, s, mode, reg0, opsize, val, addrp, what, index);
}
static TCGv_ptr gen_fp_ptr(int freg)
{
TCGv_ptr fp = tcg_temp_new_ptr();
tcg_gen_addi_ptr(fp, cpu_env, offsetof(CPUM68KState, fregs[freg]));
return fp;
}
static TCGv_ptr gen_fp_result_ptr(void)
{
TCGv_ptr fp = tcg_temp_new_ptr();
tcg_gen_addi_ptr(fp, cpu_env, offsetof(CPUM68KState, fp_result));
return fp;
}
static void gen_fp_move(TCGv_ptr dest, TCGv_ptr src)
{
TCGv t32;
TCGv_i64 t64;
t32 = tcg_temp_new();
tcg_gen_ld16u_i32(t32, src, offsetof(FPReg, l.upper));
tcg_gen_st16_i32(t32, dest, offsetof(FPReg, l.upper));
tcg_temp_free(t32);
t64 = tcg_temp_new_i64();
tcg_gen_ld_i64(t64, src, offsetof(FPReg, l.lower));
tcg_gen_st_i64(t64, dest, offsetof(FPReg, l.lower));
tcg_temp_free_i64(t64);
}
static void gen_load_fp(DisasContext *s, int opsize, TCGv addr, TCGv_ptr fp,
int index)
{
TCGv tmp;
TCGv_i64 t64;
t64 = tcg_temp_new_i64();
tmp = tcg_temp_new();
switch (opsize) {
case OS_BYTE:
tcg_gen_qemu_ld8s(tmp, addr, index);
gen_helper_exts32(cpu_env, fp, tmp);
break;
case OS_WORD:
tcg_gen_qemu_ld16s(tmp, addr, index);
gen_helper_exts32(cpu_env, fp, tmp);
break;
case OS_LONG:
tcg_gen_qemu_ld32u(tmp, addr, index);
gen_helper_exts32(cpu_env, fp, tmp);
break;
case OS_SINGLE:
tcg_gen_qemu_ld32u(tmp, addr, index);
gen_helper_extf32(cpu_env, fp, tmp);
break;
case OS_DOUBLE:
tcg_gen_qemu_ld64(t64, addr, index);
gen_helper_extf64(cpu_env, fp, t64);
break;
case OS_EXTENDED:
if (m68k_feature(s->env, M68K_FEATURE_CF_FPU)) {
gen_exception(s, s->insn_pc, EXCP_FP_UNIMP);
break;
}
tcg_gen_qemu_ld32u(tmp, addr, index);
tcg_gen_shri_i32(tmp, tmp, 16);
tcg_gen_st16_i32(tmp, fp, offsetof(FPReg, l.upper));
tcg_gen_addi_i32(tmp, addr, 4);
tcg_gen_qemu_ld64(t64, tmp, index);
tcg_gen_st_i64(t64, fp, offsetof(FPReg, l.lower));
break;
case OS_PACKED:
/* unimplemented data type on 68040/ColdFire
* FIXME if needed for another FPU
*/
gen_exception(s, s->insn_pc, EXCP_FP_UNIMP);
break;
default:
g_assert_not_reached();
}
tcg_temp_free(tmp);
tcg_temp_free_i64(t64);
}
static void gen_store_fp(DisasContext *s, int opsize, TCGv addr, TCGv_ptr fp,
int index)
{
TCGv tmp;
TCGv_i64 t64;
t64 = tcg_temp_new_i64();
tmp = tcg_temp_new();
switch (opsize) {
case OS_BYTE:
gen_helper_reds32(tmp, cpu_env, fp);
tcg_gen_qemu_st8(tmp, addr, index);
break;
case OS_WORD:
gen_helper_reds32(tmp, cpu_env, fp);
tcg_gen_qemu_st16(tmp, addr, index);
break;
case OS_LONG:
gen_helper_reds32(tmp, cpu_env, fp);
tcg_gen_qemu_st32(tmp, addr, index);
break;
case OS_SINGLE:
gen_helper_redf32(tmp, cpu_env, fp);
tcg_gen_qemu_st32(tmp, addr, index);
break;
case OS_DOUBLE:
gen_helper_redf64(t64, cpu_env, fp);
tcg_gen_qemu_st64(t64, addr, index);
break;
case OS_EXTENDED:
if (m68k_feature(s->env, M68K_FEATURE_CF_FPU)) {
gen_exception(s, s->insn_pc, EXCP_FP_UNIMP);
break;
}
tcg_gen_ld16u_i32(tmp, fp, offsetof(FPReg, l.upper));
tcg_gen_shli_i32(tmp, tmp, 16);
tcg_gen_qemu_st32(tmp, addr, index);
tcg_gen_addi_i32(tmp, addr, 4);
tcg_gen_ld_i64(t64, fp, offsetof(FPReg, l.lower));
tcg_gen_qemu_st64(t64, tmp, index);
break;
case OS_PACKED:
/* unimplemented data type on 68040/ColdFire
* FIXME if needed for another FPU
*/
gen_exception(s, s->insn_pc, EXCP_FP_UNIMP);
break;
default:
g_assert_not_reached();
}
tcg_temp_free(tmp);
tcg_temp_free_i64(t64);
}
static void gen_ldst_fp(DisasContext *s, int opsize, TCGv addr,
TCGv_ptr fp, ea_what what, int index)
{
if (what == EA_STORE) {
gen_store_fp(s, opsize, addr, fp, index);
} else {
gen_load_fp(s, opsize, addr, fp, index);
}
}
static int gen_ea_mode_fp(CPUM68KState *env, DisasContext *s, int mode,
int reg0, int opsize, TCGv_ptr fp, ea_what what,
int index)
{
TCGv reg, addr, tmp;
TCGv_i64 t64;
switch (mode) {
case 0: /* Data register direct. */
reg = cpu_dregs[reg0];
if (what == EA_STORE) {
switch (opsize) {
case OS_BYTE:
case OS_WORD:
case OS_LONG:
gen_helper_reds32(reg, cpu_env, fp);
break;
case OS_SINGLE:
gen_helper_redf32(reg, cpu_env, fp);
break;
default:
g_assert_not_reached();
}
} else {
tmp = tcg_temp_new();
switch (opsize) {
case OS_BYTE:
tcg_gen_ext8s_i32(tmp, reg);
gen_helper_exts32(cpu_env, fp, tmp);
break;
case OS_WORD:
tcg_gen_ext16s_i32(tmp, reg);
gen_helper_exts32(cpu_env, fp, tmp);
break;
case OS_LONG:
gen_helper_exts32(cpu_env, fp, reg);
break;
case OS_SINGLE:
gen_helper_extf32(cpu_env, fp, reg);
break;
default:
g_assert_not_reached();
}
tcg_temp_free(tmp);
}
return 0;
case 1: /* Address register direct. */
return -1;
case 2: /* Indirect register */
addr = get_areg(s, reg0);
gen_ldst_fp(s, opsize, addr, fp, what, index);
return 0;
case 3: /* Indirect postincrement. */
addr = cpu_aregs[reg0];
gen_ldst_fp(s, opsize, addr, fp, what, index);
tcg_gen_addi_i32(addr, addr, opsize_bytes(opsize));
return 0;
case 4: /* Indirect predecrememnt. */
addr = gen_lea_mode(env, s, mode, reg0, opsize);
if (IS_NULL_QREG(addr)) {
return -1;
}
gen_ldst_fp(s, opsize, addr, fp, what, index);
tcg_gen_mov_i32(cpu_aregs[reg0], addr);
return 0;
case 5: /* Indirect displacement. */
case 6: /* Indirect index + displacement. */
do_indirect:
addr = gen_lea_mode(env, s, mode, reg0, opsize);
if (IS_NULL_QREG(addr)) {
return -1;
}
gen_ldst_fp(s, opsize, addr, fp, what, index);
return 0;
case 7: /* Other */
switch (reg0) {
case 0: /* Absolute short. */
case 1: /* Absolute long. */
case 2: /* pc displacement */
case 3: /* pc index+displacement. */
goto do_indirect;
case 4: /* Immediate. */
if (what == EA_STORE) {
return -1;
}
switch (opsize) {
case OS_BYTE:
tmp = tcg_const_i32((int8_t)read_im8(env, s));
gen_helper_exts32(cpu_env, fp, tmp);
tcg_temp_free(tmp);
break;
case OS_WORD:
tmp = tcg_const_i32((int16_t)read_im16(env, s));
gen_helper_exts32(cpu_env, fp, tmp);
tcg_temp_free(tmp);
break;
case OS_LONG:
tmp = tcg_const_i32(read_im32(env, s));
gen_helper_exts32(cpu_env, fp, tmp);
tcg_temp_free(tmp);
break;
case OS_SINGLE:
tmp = tcg_const_i32(read_im32(env, s));
gen_helper_extf32(cpu_env, fp, tmp);
tcg_temp_free(tmp);
break;
case OS_DOUBLE:
t64 = tcg_const_i64(read_im64(env, s));
gen_helper_extf64(cpu_env, fp, t64);
tcg_temp_free_i64(t64);
break;
case OS_EXTENDED:
if (m68k_feature(s->env, M68K_FEATURE_CF_FPU)) {
gen_exception(s, s->insn_pc, EXCP_FP_UNIMP);
break;
}
tmp = tcg_const_i32(read_im32(env, s) >> 16);
tcg_gen_st16_i32(tmp, fp, offsetof(FPReg, l.upper));
tcg_temp_free(tmp);
t64 = tcg_const_i64(read_im64(env, s));
tcg_gen_st_i64(t64, fp, offsetof(FPReg, l.lower));
tcg_temp_free_i64(t64);
break;
case OS_PACKED:
/* unimplemented data type on 68040/ColdFire
* FIXME if needed for another FPU
*/
gen_exception(s, s->insn_pc, EXCP_FP_UNIMP);
break;
default:
g_assert_not_reached();
}
return 0;
default:
return -1;
}
}
return -1;
}
static int gen_ea_fp(CPUM68KState *env, DisasContext *s, uint16_t insn,
int opsize, TCGv_ptr fp, ea_what what, int index)
{
int mode = extract32(insn, 3, 3);
int reg0 = REG(insn, 0);
return gen_ea_mode_fp(env, s, mode, reg0, opsize, fp, what, index);
}
typedef struct {
TCGCond tcond;
bool g1;
bool g2;
TCGv v1;
TCGv v2;
} DisasCompare;
static void gen_cc_cond(DisasCompare *c, DisasContext *s, int cond)
{
TCGv tmp, tmp2;
TCGCond tcond;
CCOp op = s->cc_op;
/* The CC_OP_CMP form can handle most normal comparisons directly. */
if (op == CC_OP_CMPB || op == CC_OP_CMPW || op == CC_OP_CMPL) {
c->g1 = c->g2 = 1;
c->v1 = QREG_CC_N;
c->v2 = QREG_CC_V;
switch (cond) {
case 2: /* HI */
case 3: /* LS */
tcond = TCG_COND_LEU;
goto done;
case 4: /* CC */
case 5: /* CS */
tcond = TCG_COND_LTU;
goto done;
case 6: /* NE */
case 7: /* EQ */
tcond = TCG_COND_EQ;
goto done;
case 10: /* PL */
case 11: /* MI */
c->g1 = c->g2 = 0;
c->v2 = tcg_const_i32(0);
c->v1 = tmp = tcg_temp_new();
tcg_gen_sub_i32(tmp, QREG_CC_N, QREG_CC_V);
gen_ext(tmp, tmp, op - CC_OP_CMPB, 1);
/* fallthru */
case 12: /* GE */
case 13: /* LT */
tcond = TCG_COND_LT;
goto done;
case 14: /* GT */
case 15: /* LE */
tcond = TCG_COND_LE;
goto done;
}
}
c->g1 = 1;
c->g2 = 0;
c->v2 = tcg_const_i32(0);
switch (cond) {
case 0: /* T */
case 1: /* F */
c->v1 = c->v2;
tcond = TCG_COND_NEVER;
goto done;
case 14: /* GT (!(Z || (N ^ V))) */
case 15: /* LE (Z || (N ^ V)) */
/* Logic operations clear V, which simplifies LE to (Z || N),
and since Z and N are co-located, this becomes a normal
comparison vs N. */
if (op == CC_OP_LOGIC) {
c->v1 = QREG_CC_N;
tcond = TCG_COND_LE;
goto done;
}
break;
case 12: /* GE (!(N ^ V)) */
case 13: /* LT (N ^ V) */
/* Logic operations clear V, which simplifies this to N. */
if (op != CC_OP_LOGIC) {
break;
}
/* fallthru */
case 10: /* PL (!N) */
case 11: /* MI (N) */
/* Several cases represent N normally. */
if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL ||
op == CC_OP_LOGIC) {
c->v1 = QREG_CC_N;
tcond = TCG_COND_LT;
goto done;
}
break;
case 6: /* NE (!Z) */
case 7: /* EQ (Z) */
/* Some cases fold Z into N. */
if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL ||
op == CC_OP_LOGIC) {
tcond = TCG_COND_EQ;
c->v1 = QREG_CC_N;
goto done;
}
break;
case 4: /* CC (!C) */
case 5: /* CS (C) */
/* Some cases fold C into X. */
if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL) {
tcond = TCG_COND_NE;
c->v1 = QREG_CC_X;
goto done;
}
/* fallthru */
case 8: /* VC (!V) */
case 9: /* VS (V) */
/* Logic operations clear V and C. */
if (op == CC_OP_LOGIC) {
tcond = TCG_COND_NEVER;
c->v1 = c->v2;
goto done;
}
break;
}
/* Otherwise, flush flag state to CC_OP_FLAGS. */
gen_flush_flags(s);
switch (cond) {
case 0: /* T */
case 1: /* F */
default:
/* Invalid, or handled above. */
abort();
case 2: /* HI (!C && !Z) -> !(C || Z)*/
case 3: /* LS (C || Z) */
c->v1 = tmp = tcg_temp_new();
c->g1 = 0;
tcg_gen_setcond_i32(TCG_COND_EQ, tmp, QREG_CC_Z, c->v2);
tcg_gen_or_i32(tmp, tmp, QREG_CC_C);
tcond = TCG_COND_NE;
break;
case 4: /* CC (!C) */
case 5: /* CS (C) */
c->v1 = QREG_CC_C;
tcond = TCG_COND_NE;
break;
case 6: /* NE (!Z) */
case 7: /* EQ (Z) */
c->v1 = QREG_CC_Z;
tcond = TCG_COND_EQ;
break;
case 8: /* VC (!V) */
case 9: /* VS (V) */
c->v1 = QREG_CC_V;
tcond = TCG_COND_LT;
break;
case 10: /* PL (!N) */
case 11: /* MI (N) */
c->v1 = QREG_CC_N;
tcond = TCG_COND_LT;
break;
case 12: /* GE (!(N ^ V)) */
case 13: /* LT (N ^ V) */
c->v1 = tmp = tcg_temp_new();
c->g1 = 0;
tcg_gen_xor_i32(tmp, QREG_CC_N, QREG_CC_V);
tcond = TCG_COND_LT;
break;
case 14: /* GT (!(Z || (N ^ V))) */
case 15: /* LE (Z || (N ^ V)) */
c->v1 = tmp = tcg_temp_new();
c->g1 = 0;
tcg_gen_setcond_i32(TCG_COND_EQ, tmp, QREG_CC_Z, c->v2);
tcg_gen_neg_i32(tmp, tmp);
tmp2 = tcg_temp_new();
tcg_gen_xor_i32(tmp2, QREG_CC_N, QREG_CC_V);
tcg_gen_or_i32(tmp, tmp, tmp2);
tcg_temp_free(tmp2);
tcond = TCG_COND_LT;
break;
}
done:
if ((cond & 1) == 0) {
tcond = tcg_invert_cond(tcond);
}
c->tcond = tcond;
}
static void free_cond(DisasCompare *c)
{
if (!c->g1) {
tcg_temp_free(c->v1);
}
if (!c->g2) {
tcg_temp_free(c->v2);
}
}
static void gen_jmpcc(DisasContext *s, int cond, TCGLabel *l1)
{
DisasCompare c;
gen_cc_cond(&c, s, cond);
update_cc_op(s);
tcg_gen_brcond_i32(c.tcond, c.v1, c.v2, l1);
free_cond(&c);
}
/* Force a TB lookup after an instruction that changes the CPU state. */
static void gen_lookup_tb(DisasContext *s)
{
update_cc_op(s);
tcg_gen_movi_i32(QREG_PC, s->pc);
s->is_jmp = DISAS_UPDATE;
}
#define SRC_EA(env, result, opsize, op_sign, addrp) do { \
result = gen_ea(env, s, insn, opsize, NULL_QREG, addrp, \
op_sign ? EA_LOADS : EA_LOADU, IS_USER(s)); \
if (IS_NULL_QREG(result)) { \
gen_addr_fault(s); \
return; \
} \
} while (0)
#define DEST_EA(env, insn, opsize, val, addrp) do { \
TCGv ea_result = gen_ea(env, s, insn, opsize, val, addrp, \
EA_STORE, IS_USER(s)); \
if (IS_NULL_QREG(ea_result)) { \
gen_addr_fault(s); \
return; \
} \
} while (0)
static inline bool use_goto_tb(DisasContext *s, uint32_t dest)
{
#ifndef CONFIG_USER_ONLY
return (s->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(scc)
{
DisasCompare c;
int cond;
TCGv tmp;
cond = (insn >> 8) & 0xf;
gen_cc_cond(&c, s, cond);
tmp = tcg_temp_new();
tcg_gen_setcond_i32(c.tcond, tmp, c.v1, c.v2);
free_cond(&c);
tcg_gen_neg_i32(tmp, tmp);
DEST_EA(env, insn, OS_BYTE, tmp, NULL);
tcg_temp_free(tmp);
}
DISAS_INSN(dbcc)
{
TCGLabel *l1;
TCGv reg;
TCGv tmp;
int16_t offset;
uint32_t base;
reg = DREG(insn, 0);
base = s->pc;
offset = (int16_t)read_im16(env, s);
l1 = gen_new_label();
gen_jmpcc(s, (insn >> 8) & 0xf, l1);
tmp = tcg_temp_new();
tcg_gen_ext16s_i32(tmp, reg);
tcg_gen_addi_i32(tmp, tmp, -1);
gen_partset_reg(OS_WORD, reg, tmp);
tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, -1, l1);
gen_jmp_tb(s, 1, base + offset);
gen_set_label(l1);
gen_jmp_tb(s, 0, s->pc);
}
DISAS_INSN(undef_mac)
{
gen_exception(s, s->insn_pc, EXCP_LINEA);
}
DISAS_INSN(undef_fpu)
{
gen_exception(s, s->insn_pc, EXCP_LINEF);
}
DISAS_INSN(undef)
{
/* ??? This is both instructions that are as yet unimplemented
for the 680x0 series, as well as those that are implemented
but actually illegal for CPU32 or pre-68020. */
qemu_log_mask(LOG_UNIMP, "Illegal instruction: %04x @ %08x",
insn, s->insn_pc);
gen_exception(s, s->insn_pc, EXCP_UNSUPPORTED);
}
DISAS_INSN(mulw)
{
TCGv reg;
TCGv tmp;
TCGv src;
int sign;
sign = (insn & 0x100) != 0;
reg = DREG(insn, 9);
tmp = tcg_temp_new();
if (sign)
tcg_gen_ext16s_i32(tmp, reg);
else
tcg_gen_ext16u_i32(tmp, reg);
SRC_EA(env, src, OS_WORD, sign, NULL);
tcg_gen_mul_i32(tmp, tmp, src);
tcg_gen_mov_i32(reg, tmp);
gen_logic_cc(s, tmp, OS_LONG);
tcg_temp_free(tmp);
}
DISAS_INSN(divw)
{
int sign;
TCGv src;
TCGv destr;
/* divX.w <EA>,Dn 32/16 -> 16r:16q */
sign = (insn & 0x100) != 0;
/* dest.l / src.w */
SRC_EA(env, src, OS_WORD, sign, NULL);
destr = tcg_const_i32(REG(insn, 9));
if (sign) {
gen_helper_divsw(cpu_env, destr, src);
} else {
gen_helper_divuw(cpu_env, destr, src);
}
tcg_temp_free(destr);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(divl)
{
TCGv num, reg, den;
int sign;
uint16_t ext;
ext = read_im16(env, s);
sign = (ext & 0x0800) != 0;
if (ext & 0x400) {
if (!m68k_feature(s->env, M68K_FEATURE_QUAD_MULDIV)) {
gen_exception(s, s->insn_pc, EXCP_ILLEGAL);
return;
}
/* divX.l <EA>, Dr:Dq 64/32 -> 32r:32q */
SRC_EA(env, den, OS_LONG, 0, NULL);
num = tcg_const_i32(REG(ext, 12));
reg = tcg_const_i32(REG(ext, 0));
if (sign) {
gen_helper_divsll(cpu_env, num, reg, den);
} else {
gen_helper_divull(cpu_env, num, reg, den);
}
tcg_temp_free(reg);
tcg_temp_free(num);
set_cc_op(s, CC_OP_FLAGS);
return;
}
/* divX.l <EA>, Dq 32/32 -> 32q */
/* divXl.l <EA>, Dr:Dq 32/32 -> 32r:32q */
SRC_EA(env, den, OS_LONG, 0, NULL);
num = tcg_const_i32(REG(ext, 12));
reg = tcg_const_i32(REG(ext, 0));
if (sign) {
gen_helper_divsl(cpu_env, num, reg, den);
} else {
gen_helper_divul(cpu_env, num, reg, den);
}
tcg_temp_free(reg);
tcg_temp_free(num);
set_cc_op(s, CC_OP_FLAGS);
}
static void bcd_add(TCGv dest, TCGv src)
{
TCGv t0, t1;
/* dest10 = dest10 + src10 + X
*
* t1 = src
* t2 = t1 + 0x066
* t3 = t2 + dest + X
* t4 = t2 ^ dest
* t5 = t3 ^ t4
* t6 = ~t5 & 0x110
* t7 = (t6 >> 2) | (t6 >> 3)
* return t3 - t7
*/
/* t1 = (src + 0x066) + dest + X
* = result with some possible exceding 0x6
*/
t0 = tcg_const_i32(0x066);
tcg_gen_add_i32(t0, t0, src);
t1 = tcg_temp_new();
tcg_gen_add_i32(t1, t0, dest);
tcg_gen_add_i32(t1, t1, QREG_CC_X);
/* we will remove exceding 0x6 where there is no carry */
/* t0 = (src + 0x0066) ^ dest
* = t1 without carries
*/
tcg_gen_xor_i32(t0, t0, dest);
/* extract the carries
* t0 = t0 ^ t1
* = only the carries
*/
tcg_gen_xor_i32(t0, t0, t1);
/* generate 0x1 where there is no carry
* and for each 0x10, generate a 0x6
*/
tcg_gen_shri_i32(t0, t0, 3);
tcg_gen_not_i32(t0, t0);
tcg_gen_andi_i32(t0, t0, 0x22);
tcg_gen_add_i32(dest, t0, t0);
tcg_gen_add_i32(dest, dest, t0);
tcg_temp_free(t0);
/* remove the exceding 0x6
* for digits that have not generated a carry
*/
tcg_gen_sub_i32(dest, t1, dest);
tcg_temp_free(t1);
}
static void bcd_sub(TCGv dest, TCGv src)
{
TCGv t0, t1, t2;
/* dest10 = dest10 - src10 - X
* = bcd_add(dest + 1 - X, 0x199 - src)
*/
/* t0 = 0x066 + (0x199 - src) */
t0 = tcg_temp_new();
tcg_gen_subfi_i32(t0, 0x1ff, src);
/* t1 = t0 + dest + 1 - X*/
t1 = tcg_temp_new();
tcg_gen_add_i32(t1, t0, dest);
tcg_gen_addi_i32(t1, t1, 1);
tcg_gen_sub_i32(t1, t1, QREG_CC_X);
/* t2 = t0 ^ dest */
t2 = tcg_temp_new();
tcg_gen_xor_i32(t2, t0, dest);
/* t0 = t1 ^ t2 */
tcg_gen_xor_i32(t0, t1, t2);
/* t2 = ~t0 & 0x110
* t0 = (t2 >> 2) | (t2 >> 3)
*
* to fit on 8bit operands, changed in:
*
* t2 = ~(t0 >> 3) & 0x22
* t0 = t2 + t2
* t0 = t0 + t2
*/
tcg_gen_shri_i32(t2, t0, 3);
tcg_gen_not_i32(t2, t2);
tcg_gen_andi_i32(t2, t2, 0x22);
tcg_gen_add_i32(t0, t2, t2);
tcg_gen_add_i32(t0, t0, t2);
tcg_temp_free(t2);
/* return t1 - t0 */
tcg_gen_sub_i32(dest, t1, t0);
tcg_temp_free(t0);
tcg_temp_free(t1);
}
static void bcd_flags(TCGv val)
{
tcg_gen_andi_i32(QREG_CC_C, val, 0x0ff);
tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_C);
tcg_gen_extract_i32(QREG_CC_C, val, 8, 1);
tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C);
}
DISAS_INSN(abcd_reg)
{
TCGv src;
TCGv dest;
gen_flush_flags(s); /* !Z is sticky */
src = gen_extend(DREG(insn, 0), OS_BYTE, 0);
dest = gen_extend(DREG(insn, 9), OS_BYTE, 0);
bcd_add(dest, src);
gen_partset_reg(OS_BYTE, DREG(insn, 9), dest);
bcd_flags(dest);
}
DISAS_INSN(abcd_mem)
{
TCGv src, dest, addr;
gen_flush_flags(s); /* !Z is sticky */
/* Indirect pre-decrement load (mode 4) */
src = gen_ea_mode(env, s, 4, REG(insn, 0), OS_BYTE,
NULL_QREG, NULL, EA_LOADU, IS_USER(s));
dest = gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE,
NULL_QREG, &addr, EA_LOADU, IS_USER(s));
bcd_add(dest, src);
gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE, dest, &addr,
EA_STORE, IS_USER(s));
bcd_flags(dest);
}
DISAS_INSN(sbcd_reg)
{
TCGv src, dest;
gen_flush_flags(s); /* !Z is sticky */
src = gen_extend(DREG(insn, 0), OS_BYTE, 0);
dest = gen_extend(DREG(insn, 9), OS_BYTE, 0);
bcd_sub(dest, src);
gen_partset_reg(OS_BYTE, DREG(insn, 9), dest);
bcd_flags(dest);
}
DISAS_INSN(sbcd_mem)
{
TCGv src, dest, addr;
gen_flush_flags(s); /* !Z is sticky */
/* Indirect pre-decrement load (mode 4) */
src = gen_ea_mode(env, s, 4, REG(insn, 0), OS_BYTE,
NULL_QREG, NULL, EA_LOADU, IS_USER(s));
dest = gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE,
NULL_QREG, &addr, EA_LOADU, IS_USER(s));
bcd_sub(dest, src);
gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE, dest, &addr,
EA_STORE, IS_USER(s));
bcd_flags(dest);
}
DISAS_INSN(nbcd)
{
TCGv src, dest;
TCGv addr;
gen_flush_flags(s); /* !Z is sticky */
SRC_EA(env, src, OS_BYTE, 0, &addr);
dest = tcg_const_i32(0);
bcd_sub(dest, src);
DEST_EA(env, insn, OS_BYTE, dest, &addr);
bcd_flags(dest);
tcg_temp_free(dest);
}
DISAS_INSN(addsub)
{
TCGv reg;
TCGv dest;
TCGv src;
TCGv tmp;
TCGv addr;
int add;
int opsize;
add = (insn & 0x4000) != 0;
opsize = insn_opsize(insn);
reg = gen_extend(DREG(insn, 9), opsize, 1);
dest = tcg_temp_new();
if (insn & 0x100) {
SRC_EA(env, tmp, opsize, 1, &addr);
src = reg;
} else {
tmp = reg;
SRC_EA(env, src, opsize, 1, NULL);
}
if (add) {
tcg_gen_add_i32(dest, tmp, src);
tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, src);
set_cc_op(s, CC_OP_ADDB + opsize);
} else {
tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, tmp, src);
tcg_gen_sub_i32(dest, tmp, src);
set_cc_op(s, CC_OP_SUBB + opsize);
}
gen_update_cc_add(dest, src, opsize);
if (insn & 0x100) {
DEST_EA(env, insn, opsize, dest, &addr);
} else {
gen_partset_reg(opsize, DREG(insn, 9), dest);
}
tcg_temp_free(dest);
}
/* Reverse the order of the bits in REG. */
DISAS_INSN(bitrev)
{
TCGv reg;
reg = DREG(insn, 0);
gen_helper_bitrev(reg, reg);
}
DISAS_INSN(bitop_reg)
{
int opsize;
int op;
TCGv src1;
TCGv src2;
TCGv tmp;
TCGv addr;
TCGv dest;
if ((insn & 0x38) != 0)
opsize = OS_BYTE;
else
opsize = OS_LONG;
op = (insn >> 6) & 3;
SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
gen_flush_flags(s);
src2 = tcg_temp_new();
if (opsize == OS_BYTE)
tcg_gen_andi_i32(src2, DREG(insn, 9), 7);
else
tcg_gen_andi_i32(src2, DREG(insn, 9), 31);
tmp = tcg_const_i32(1);
tcg_gen_shl_i32(tmp, tmp, src2);
tcg_temp_free(src2);
tcg_gen_and_i32(QREG_CC_Z, src1, tmp);
dest = tcg_temp_new();
switch (op) {
case 1: /* bchg */
tcg_gen_xor_i32(dest, src1, tmp);
break;
case 2: /* bclr */
tcg_gen_andc_i32(dest, src1, tmp);
break;
case 3: /* bset */
tcg_gen_or_i32(dest, src1, tmp);
break;
default: /* btst */
break;
}
tcg_temp_free(tmp);
if (op) {
DEST_EA(env, insn, opsize, dest, &addr);
}
tcg_temp_free(dest);
}
DISAS_INSN(sats)
{
TCGv reg;
reg = DREG(insn, 0);
gen_flush_flags(s);
gen_helper_sats(reg, reg, QREG_CC_V);
gen_logic_cc(s, reg, OS_LONG);
}
static void gen_push(DisasContext *s, TCGv val)
{
TCGv tmp;
tmp = tcg_temp_new();
tcg_gen_subi_i32(tmp, QREG_SP, 4);
gen_store(s, OS_LONG, tmp, val, IS_USER(s));
tcg_gen_mov_i32(QREG_SP, tmp);
tcg_temp_free(tmp);
}
static TCGv mreg(int reg)
{
if (reg < 8) {
/* Dx */
return cpu_dregs[reg];
}
/* Ax */
return cpu_aregs[reg & 7];
}
DISAS_INSN(movem)
{
TCGv addr, incr, tmp, r[16];
int is_load = (insn & 0x0400) != 0;
int opsize = (insn & 0x40) != 0 ? OS_LONG : OS_WORD;
uint16_t mask = read_im16(env, s);
int mode = extract32(insn, 3, 3);
int reg0 = REG(insn, 0);
int i;
tmp = cpu_aregs[reg0];
switch (mode) {
case 0: /* data register direct */
case 1: /* addr register direct */
do_addr_fault:
gen_addr_fault(s);
return;
case 2: /* indirect */
break;
case 3: /* indirect post-increment */
if (!is_load) {
/* post-increment is not allowed */
goto do_addr_fault;
}
break;
case 4: /* indirect pre-decrement */
if (is_load) {
/* pre-decrement is not allowed */
goto do_addr_fault;
}
/* We want a bare copy of the address reg, without any pre-decrement
adjustment, as gen_lea would provide. */
break;
default:
tmp = gen_lea_mode(env, s, mode, reg0, opsize);
if (IS_NULL_QREG(tmp)) {
goto do_addr_fault;
}
break;
}
addr = tcg_temp_new();
tcg_gen_mov_i32(addr, tmp);
incr = tcg_const_i32(opsize_bytes(opsize));
if (is_load) {
/* memory to register */
for (i = 0; i < 16; i++) {
if (mask & (1 << i)) {
r[i] = gen_load(s, opsize, addr, 1, IS_USER(s));
tcg_gen_add_i32(addr, addr, incr);
}
}
for (i = 0; i < 16; i++) {
if (mask & (1 << i)) {
tcg_gen_mov_i32(mreg(i), r[i]);
tcg_temp_free(r[i]);
}
}
if (mode == 3) {
/* post-increment: movem (An)+,X */
tcg_gen_mov_i32(cpu_aregs[reg0], addr);
}
} else {
/* register to memory */
if (mode == 4) {
/* pre-decrement: movem X,-(An) */
for (i = 15; i >= 0; i--) {
if ((mask << i) & 0x8000) {
tcg_gen_sub_i32(addr, addr, incr);
if (reg0 + 8 == i &&
m68k_feature(s->env, M68K_FEATURE_EXT_FULL)) {
/* M68020+: if the addressing register is the
* register moved to memory, the value written
* is the initial value decremented by the size of
* the operation, regardless of how many actual
* stores have been performed until this point.
* M68000/M68010: the value is the initial value.
*/
tmp = tcg_temp_new();
tcg_gen_sub_i32(tmp, cpu_aregs[reg0], incr);
gen_store(s, opsize, addr, tmp, IS_USER(s));
tcg_temp_free(tmp);
} else {
gen_store(s, opsize, addr, mreg(i), IS_USER(s));
}
}
}
tcg_gen_mov_i32(cpu_aregs[reg0], addr);
} else {
for (i = 0; i < 16; i++) {
if (mask & (1 << i)) {
gen_store(s, opsize, addr, mreg(i), IS_USER(s));
tcg_gen_add_i32(addr, addr, incr);
}
}
}
}
tcg_temp_free(incr);
tcg_temp_free(addr);
}
DISAS_INSN(movep)
{
uint8_t i;
int16_t displ;
TCGv reg;
TCGv addr;
TCGv abuf;
TCGv dbuf;
displ = read_im16(env, s);
addr = AREG(insn, 0);
reg = DREG(insn, 9);
abuf = tcg_temp_new();
tcg_gen_addi_i32(abuf, addr, displ);
dbuf = tcg_temp_new();
if (insn & 0x40) {
i = 4;
} else {
i = 2;
}
if (insn & 0x80) {
for ( ; i > 0 ; i--) {
tcg_gen_shri_i32(dbuf, reg, (i - 1) * 8);
tcg_gen_qemu_st8(dbuf, abuf, IS_USER(s));
if (i > 1) {
tcg_gen_addi_i32(abuf, abuf, 2);
}
}
} else {
for ( ; i > 0 ; i--) {
tcg_gen_qemu_ld8u(dbuf, abuf, IS_USER(s));
tcg_gen_deposit_i32(reg, reg, dbuf, (i - 1) * 8, 8);
if (i > 1) {
tcg_gen_addi_i32(abuf, abuf, 2);
}
}
}
tcg_temp_free(abuf);
tcg_temp_free(dbuf);
}
DISAS_INSN(bitop_im)
{
int opsize;
int op;
TCGv src1;
uint32_t mask;
int bitnum;
TCGv tmp;
TCGv addr;
if ((insn & 0x38) != 0)
opsize = OS_BYTE;
else
opsize = OS_LONG;
op = (insn >> 6) & 3;
bitnum = read_im16(env, s);
if (m68k_feature(s->env, M68K_FEATURE_M68000)) {
if (bitnum & 0xfe00) {
disas_undef(env, s, insn);
return;
}
} else {
if (bitnum & 0xff00) {
disas_undef(env, s, insn);
return;
}
}
SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
gen_flush_flags(s);
if (opsize == OS_BYTE)
bitnum &= 7;
else
bitnum &= 31;
mask = 1 << bitnum;
tcg_gen_andi_i32(QREG_CC_Z, src1, mask);
if (op) {
tmp = tcg_temp_new();
switch (op) {
case 1: /* bchg */
tcg_gen_xori_i32(tmp, src1, mask);
break;
case 2: /* bclr */
tcg_gen_andi_i32(tmp, src1, ~mask);
break;
case 3: /* bset */
tcg_gen_ori_i32(tmp, src1, mask);
break;
default: /* btst */
break;
}
DEST_EA(env, insn, opsize, tmp, &addr);
tcg_temp_free(tmp);
}
}
static TCGv gen_get_ccr(DisasContext *s)
{
TCGv dest;
update_cc_op(s);
dest = tcg_temp_new();
gen_helper_get_ccr(dest, cpu_env);
return dest;
}
static TCGv gen_get_sr(DisasContext *s)
{
TCGv ccr;
TCGv sr;
ccr = gen_get_ccr(s);
sr = tcg_temp_new();
tcg_gen_andi_i32(sr, QREG_SR, 0xffe0);
tcg_gen_or_i32(sr, sr, ccr);
return sr;
}
static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)
{
if (ccr_only) {
tcg_gen_movi_i32(QREG_CC_C, val & CCF_C ? 1 : 0);
tcg_gen_movi_i32(QREG_CC_V, val & CCF_V ? -1 : 0);
tcg_gen_movi_i32(QREG_CC_Z, val & CCF_Z ? 0 : 1);
tcg_gen_movi_i32(QREG_CC_N, val & CCF_N ? -1 : 0);
tcg_gen_movi_i32(QREG_CC_X, val & CCF_X ? 1 : 0);
} else {
TCGv sr = tcg_const_i32(val);
gen_helper_set_sr(cpu_env, sr);
tcg_temp_free(sr);
}
set_cc_op(s, CC_OP_FLAGS);
}
static void gen_set_sr(DisasContext *s, TCGv val, int ccr_only)
{
if (ccr_only) {
gen_helper_set_ccr(cpu_env, val);
} else {
gen_helper_set_sr(cpu_env, val);
}
set_cc_op(s, CC_OP_FLAGS);
}
static void gen_move_to_sr(CPUM68KState *env, DisasContext *s, uint16_t insn,
bool ccr_only)
{
if ((insn & 0x3f) == 0x3c) {
uint16_t val;
val = read_im16(env, s);
gen_set_sr_im(s, val, ccr_only);
} else {
TCGv src;
SRC_EA(env, src, OS_WORD, 0, NULL);
gen_set_sr(s, src, ccr_only);
}
}
DISAS_INSN(arith_im)
{
int op;
TCGv im;
TCGv src1;
TCGv dest;
TCGv addr;
int opsize;
bool with_SR = ((insn & 0x3f) == 0x3c);
op = (insn >> 9) & 7;
opsize = insn_opsize(insn);
switch (opsize) {
case OS_BYTE:
im = tcg_const_i32((int8_t)read_im8(env, s));
break;
case OS_WORD:
im = tcg_const_i32((int16_t)read_im16(env, s));
break;
case OS_LONG:
im = tcg_const_i32(read_im32(env, s));
break;
default:
abort();
}
if (with_SR) {
/* SR/CCR can only be used with andi/eori/ori */
if (op == 2 || op == 3 || op == 6) {
disas_undef(env, s, insn);
return;
}
switch (opsize) {
case OS_BYTE:
src1 = gen_get_ccr(s);
break;
case OS_WORD:
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
src1 = gen_get_sr(s);
break;
case OS_LONG:
disas_undef(env, s, insn);
return;
}
} else {
SRC_EA(env, src1, opsize, 1, (op == 6) ? NULL : &addr);
}
dest = tcg_temp_new();
switch (op) {
case 0: /* ori */
tcg_gen_or_i32(dest, src1, im);
if (with_SR) {
gen_set_sr(s, dest, opsize == OS_BYTE);
} else {
DEST_EA(env, insn, opsize, dest, &addr);
gen_logic_cc(s, dest, opsize);
}
break;
case 1: /* andi */
tcg_gen_and_i32(dest, src1, im);
if (with_SR) {
gen_set_sr(s, dest, opsize == OS_BYTE);
} else {
DEST_EA(env, insn, opsize, dest, &addr);
gen_logic_cc(s, dest, opsize);
}
break;
case 2: /* subi */
tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, src1, im);
tcg_gen_sub_i32(dest, src1, im);
gen_update_cc_add(dest, im, opsize);
set_cc_op(s, CC_OP_SUBB + opsize);
DEST_EA(env, insn, opsize, dest, &addr);
break;
case 3: /* addi */
tcg_gen_add_i32(dest, src1, im);
gen_update_cc_add(dest, im, opsize);
tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, im);
set_cc_op(s, CC_OP_ADDB + opsize);
DEST_EA(env, insn, opsize, dest, &addr);
break;
case 5: /* eori */
tcg_gen_xor_i32(dest, src1, im);
if (with_SR) {
gen_set_sr(s, dest, opsize == OS_BYTE);
} else {
DEST_EA(env, insn, opsize, dest, &addr);
gen_logic_cc(s, dest, opsize);
}
break;
case 6: /* cmpi */
gen_update_cc_cmp(s, src1, im, opsize);
break;
default:
abort();
}
tcg_temp_free(im);
tcg_temp_free(dest);
}
DISAS_INSN(cas)
{
int opsize;
TCGv addr;
uint16_t ext;
TCGv load;
TCGv cmp;
TCGMemOp opc;
switch ((insn >> 9) & 3) {
case 1:
opsize = OS_BYTE;
opc = MO_SB;
break;
case 2:
opsize = OS_WORD;
opc = MO_TESW;
break;
case 3:
opsize = OS_LONG;
opc = MO_TESL;
break;
default:
g_assert_not_reached();
}
ext = read_im16(env, s);
/* cas Dc,Du,<EA> */
addr = gen_lea(env, s, insn, opsize);
if (IS_NULL_QREG(addr)) {
gen_addr_fault(s);
return;
}
cmp = gen_extend(DREG(ext, 0), opsize, 1);
/* if <EA> == Dc then
* <EA> = Du
* Dc = <EA> (because <EA> == Dc)
* else
* Dc = <EA>
*/
load = tcg_temp_new();
tcg_gen_atomic_cmpxchg_i32(load, addr, cmp, DREG(ext, 6),
IS_USER(s), opc);
/* update flags before setting cmp to load */
gen_update_cc_cmp(s, load, cmp, opsize);
gen_partset_reg(opsize, DREG(ext, 0), load);
tcg_temp_free(load);
switch (extract32(insn, 3, 3)) {
case 3: /* Indirect postincrement. */
tcg_gen_addi_i32(AREG(insn, 0), addr, opsize_bytes(opsize));
break;
case 4: /* Indirect predecrememnt. */
tcg_gen_mov_i32(AREG(insn, 0), addr);
break;
}
}
DISAS_INSN(cas2w)
{
uint16_t ext1, ext2;
TCGv addr1, addr2;
TCGv regs;
/* cas2 Dc1:Dc2,Du1:Du2,(Rn1):(Rn2) */
ext1 = read_im16(env, s);
if (ext1 & 0x8000) {
/* Address Register */
addr1 = AREG(ext1, 12);
} else {
/* Data Register */
addr1 = DREG(ext1, 12);
}
ext2 = read_im16(env, s);
if (ext2 & 0x8000) {
/* Address Register */
addr2 = AREG(ext2, 12);
} else {
/* Data Register */
addr2 = DREG(ext2, 12);
}
/* if (R1) == Dc1 && (R2) == Dc2 then
* (R1) = Du1
* (R2) = Du2
* else
* Dc1 = (R1)
* Dc2 = (R2)
*/
regs = tcg_const_i32(REG(ext2, 6) |
(REG(ext1, 6) << 3) |
(REG(ext2, 0) << 6) |
(REG(ext1, 0) << 9));
if (tb_cflags(s->tb) & CF_PARALLEL) {
gen_helper_exit_atomic(cpu_env);
} else {
gen_helper_cas2w(cpu_env, regs, addr1, addr2);
}
tcg_temp_free(regs);
/* Note that cas2w also assigned to env->cc_op. */
s->cc_op = CC_OP_CMPW;
s->cc_op_synced = 1;
}
DISAS_INSN(cas2l)
{
uint16_t ext1, ext2;
TCGv addr1, addr2, regs;
/* cas2 Dc1:Dc2,Du1:Du2,(Rn1):(Rn2) */
ext1 = read_im16(env, s);
if (ext1 & 0x8000) {
/* Address Register */
addr1 = AREG(ext1, 12);
} else {
/* Data Register */
addr1 = DREG(ext1, 12);
}
ext2 = read_im16(env, s);
if (ext2 & 0x8000) {
/* Address Register */
addr2 = AREG(ext2, 12);
} else {
/* Data Register */
addr2 = DREG(ext2, 12);
}
/* if (R1) == Dc1 && (R2) == Dc2 then
* (R1) = Du1
* (R2) = Du2
* else
* Dc1 = (R1)
* Dc2 = (R2)
*/
regs = tcg_const_i32(REG(ext2, 6) |
(REG(ext1, 6) << 3) |
(REG(ext2, 0) << 6) |
(REG(ext1, 0) << 9));
if (tb_cflags(s->tb) & CF_PARALLEL) {
gen_helper_cas2l_parallel(cpu_env, regs, addr1, addr2);
} else {
gen_helper_cas2l(cpu_env, regs, addr1, addr2);
}
tcg_temp_free(regs);
/* Note that cas2l also assigned to env->cc_op. */
s->cc_op = CC_OP_CMPL;
s->cc_op_synced = 1;
}
DISAS_INSN(byterev)
{
TCGv reg;
reg = DREG(insn, 0);
tcg_gen_bswap32_i32(reg, reg);
}
DISAS_INSN(move)
{
TCGv src;
TCGv dest;
int op;
int opsize;
switch (insn >> 12) {
case 1: /* move.b */
opsize = OS_BYTE;
break;
case 2: /* move.l */
opsize = OS_LONG;
break;
case 3: /* move.w */
opsize = OS_WORD;
break;
default:
abort();
}
SRC_EA(env, src, opsize, 1, NULL);
op = (insn >> 6) & 7;
if (op == 1) {
/* movea */
/* The value will already have been sign extended. */
dest = AREG(insn, 9);
tcg_gen_mov_i32(dest, src);
} else {
/* normal move */
uint16_t dest_ea;
dest_ea = ((insn >> 9) & 7) | (op << 3);
DEST_EA(env, dest_ea, opsize, src, NULL);
/* This will be correct because loads sign extend. */
gen_logic_cc(s, src, opsize);
}
}
DISAS_INSN(negx)
{
TCGv z;
TCGv src;
TCGv addr;
int opsize;
opsize = insn_opsize(insn);
SRC_EA(env, src, opsize, 1, &addr);
gen_flush_flags(s); /* compute old Z */
/* Perform substract with borrow.
* (X, N) = -(src + X);
*/
z = tcg_const_i32(0);
tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, src, z, QREG_CC_X, z);
tcg_gen_sub2_i32(QREG_CC_N, QREG_CC_X, z, z, QREG_CC_N, QREG_CC_X);
tcg_temp_free(z);
gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
tcg_gen_andi_i32(QREG_CC_X, QREG_CC_X, 1);
/* Compute signed-overflow for negation. The normal formula for
* subtraction is (res ^ src) & (src ^ dest), but with dest==0
* this simplies to res & src.
*/
tcg_gen_and_i32(QREG_CC_V, QREG_CC_N, src);
/* Copy the rest of the results into place. */
tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
set_cc_op(s, CC_OP_FLAGS);
/* result is in QREG_CC_N */
DEST_EA(env, insn, opsize, QREG_CC_N, &addr);
}
DISAS_INSN(lea)
{
TCGv reg;
TCGv tmp;
reg = AREG(insn, 9);
tmp = gen_lea(env, s, insn, OS_LONG);
if (IS_NULL_QREG(tmp)) {
gen_addr_fault(s);
return;
}
tcg_gen_mov_i32(reg, tmp);
}
DISAS_INSN(clr)
{
int opsize;
TCGv zero;
zero = tcg_const_i32(0);
opsize = insn_opsize(insn);
DEST_EA(env, insn, opsize, zero, NULL);
gen_logic_cc(s, zero, opsize);
tcg_temp_free(zero);
}
DISAS_INSN(move_from_ccr)
{
TCGv ccr;
ccr = gen_get_ccr(s);
DEST_EA(env, insn, OS_WORD, ccr, NULL);
}
DISAS_INSN(neg)
{
TCGv src1;
TCGv dest;
TCGv addr;
int opsize;
opsize = insn_opsize(insn);
SRC_EA(env, src1, opsize, 1, &addr);
dest = tcg_temp_new();
tcg_gen_neg_i32(dest, src1);
set_cc_op(s, CC_OP_SUBB + opsize);
gen_update_cc_add(dest, src1, opsize);
tcg_gen_setcondi_i32(TCG_COND_NE, QREG_CC_X, dest, 0);
DEST_EA(env, insn, opsize, dest, &addr);
tcg_temp_free(dest);
}
DISAS_INSN(move_to_ccr)
{
gen_move_to_sr(env, s, insn, true);
}
DISAS_INSN(not)
{
TCGv src1;
TCGv dest;
TCGv addr;
int opsize;
opsize = insn_opsize(insn);
SRC_EA(env, src1, opsize, 1, &addr);
dest = tcg_temp_new();
tcg_gen_not_i32(dest, src1);
DEST_EA(env, insn, opsize, dest, &addr);
gen_logic_cc(s, dest, opsize);
}
DISAS_INSN(swap)
{
TCGv src1;
TCGv src2;
TCGv reg;
src1 = tcg_temp_new();
src2 = tcg_temp_new();
reg = DREG(insn, 0);
tcg_gen_shli_i32(src1, reg, 16);
tcg_gen_shri_i32(src2, reg, 16);
tcg_gen_or_i32(reg, src1, src2);
tcg_temp_free(src2);
tcg_temp_free(src1);
gen_logic_cc(s, reg, OS_LONG);
}
DISAS_INSN(bkpt)
{
gen_exception(s, s->insn_pc, EXCP_DEBUG);
}
DISAS_INSN(pea)
{
TCGv tmp;
tmp = gen_lea(env, s, insn, OS_LONG);
if (IS_NULL_QREG(tmp)) {
gen_addr_fault(s);
return;
}
gen_push(s, tmp);
}
DISAS_INSN(ext)
{
int op;
TCGv reg;
TCGv tmp;
reg = DREG(insn, 0);
op = (insn >> 6) & 7;
tmp = tcg_temp_new();
if (op == 3)
tcg_gen_ext16s_i32(tmp, reg);
else
tcg_gen_ext8s_i32(tmp, reg);
if (op == 2)
gen_partset_reg(OS_WORD, reg, tmp);
else
tcg_gen_mov_i32(reg, tmp);
gen_logic_cc(s, tmp, OS_LONG);
tcg_temp_free(tmp);
}
DISAS_INSN(tst)
{
int opsize;
TCGv tmp;
opsize = insn_opsize(insn);
SRC_EA(env, tmp, opsize, 1, NULL);
gen_logic_cc(s, tmp, opsize);
}
DISAS_INSN(pulse)
{
/* Implemented as a NOP. */
}
DISAS_INSN(illegal)
{
gen_exception(s, s->insn_pc, EXCP_ILLEGAL);
}
/* ??? This should be atomic. */
DISAS_INSN(tas)
{
TCGv dest;
TCGv src1;
TCGv addr;
dest = tcg_temp_new();
SRC_EA(env, src1, OS_BYTE, 1, &addr);
gen_logic_cc(s, src1, OS_BYTE);
tcg_gen_ori_i32(dest, src1, 0x80);
DEST_EA(env, insn, OS_BYTE, dest, &addr);
tcg_temp_free(dest);
}
DISAS_INSN(mull)
{
uint16_t ext;
TCGv src1;
int sign;
ext = read_im16(env, s);
sign = ext & 0x800;
if (ext & 0x400) {
if (!m68k_feature(s->env, M68K_FEATURE_QUAD_MULDIV)) {
gen_exception(s, s->insn_pc, EXCP_UNSUPPORTED);
return;
}
SRC_EA(env, src1, OS_LONG, 0, NULL);
if (sign) {
tcg_gen_muls2_i32(QREG_CC_Z, QREG_CC_N, src1, DREG(ext, 12));
} else {
tcg_gen_mulu2_i32(QREG_CC_Z, QREG_CC_N, src1, DREG(ext, 12));
}
/* if Dl == Dh, 68040 returns low word */
tcg_gen_mov_i32(DREG(ext, 0), QREG_CC_N);
tcg_gen_mov_i32(DREG(ext, 12), QREG_CC_Z);
tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N);
tcg_gen_movi_i32(QREG_CC_V, 0);
tcg_gen_movi_i32(QREG_CC_C, 0);
set_cc_op(s, CC_OP_FLAGS);
return;
}
SRC_EA(env, src1, OS_LONG, 0, NULL);
if (m68k_feature(s->env, M68K_FEATURE_M68000)) {
tcg_gen_movi_i32(QREG_CC_C, 0);
if (sign) {
tcg_gen_muls2_i32(QREG_CC_N, QREG_CC_V, src1, DREG(ext, 12));
/* QREG_CC_V is -(QREG_CC_V != (QREG_CC_N >> 31)) */
tcg_gen_sari_i32(QREG_CC_Z, QREG_CC_N, 31);
tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, QREG_CC_V, QREG_CC_Z);
} else {
tcg_gen_mulu2_i32(QREG_CC_N, QREG_CC_V, src1, DREG(ext, 12));
/* QREG_CC_V is -(QREG_CC_V != 0), use QREG_CC_C as 0 */
tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, QREG_CC_V, QREG_CC_C);
}
tcg_gen_neg_i32(QREG_CC_V, QREG_CC_V);
tcg_gen_mov_i32(DREG(ext, 12), QREG_CC_N);
tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
set_cc_op(s, CC_OP_FLAGS);
} else {
/* The upper 32 bits of the product are discarded, so
muls.l and mulu.l are functionally equivalent. */
tcg_gen_mul_i32(DREG(ext, 12), src1, DREG(ext, 12));
gen_logic_cc(s, DREG(ext, 12), OS_LONG);
}
}
static void gen_link(DisasContext *s, uint16_t insn, int32_t offset)
{
TCGv reg;
TCGv tmp;
reg = AREG(insn, 0);
tmp = tcg_temp_new();
tcg_gen_subi_i32(tmp, QREG_SP, 4);
gen_store(s, OS_LONG, tmp, reg, IS_USER(s));
if ((insn & 7) != 7) {
tcg_gen_mov_i32(reg, tmp);
}
tcg_gen_addi_i32(QREG_SP, tmp, offset);
tcg_temp_free(tmp);
}
DISAS_INSN(link)
{
int16_t offset;
offset = read_im16(env, s);
gen_link(s, insn, offset);
}
DISAS_INSN(linkl)
{
int32_t offset;
offset = read_im32(env, s);
gen_link(s, insn, offset);
}
DISAS_INSN(unlk)
{
TCGv src;
TCGv reg;
TCGv tmp;
src = tcg_temp_new();
reg = AREG(insn, 0);
tcg_gen_mov_i32(src, reg);
tmp = gen_load(s, OS_LONG, src, 0, IS_USER(s));
tcg_gen_mov_i32(reg, tmp);
tcg_gen_addi_i32(QREG_SP, src, 4);
tcg_temp_free(src);
}
#if defined(CONFIG_SOFTMMU)
DISAS_INSN(reset)
{
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
gen_helper_reset(cpu_env);
}
#endif
DISAS_INSN(nop)
{
}
DISAS_INSN(rtd)
{
TCGv tmp;
int16_t offset = read_im16(env, s);
tmp = gen_load(s, OS_LONG, QREG_SP, 0, IS_USER(s));
tcg_gen_addi_i32(QREG_SP, QREG_SP, offset + 4);
gen_jmp(s, tmp);
}
DISAS_INSN(rts)
{
TCGv tmp;
tmp = gen_load(s, OS_LONG, QREG_SP, 0, IS_USER(s));
tcg_gen_addi_i32(QREG_SP, QREG_SP, 4);
gen_jmp(s, tmp);
}
DISAS_INSN(jump)
{
TCGv tmp;
/* Load the target address first to ensure correct exception
behavior. */
tmp = gen_lea(env, s, insn, OS_LONG);
if (IS_NULL_QREG(tmp)) {
gen_addr_fault(s);
return;
}
if ((insn & 0x40) == 0) {
/* jsr */
gen_push(s, tcg_const_i32(s->pc));
}
gen_jmp(s, tmp);
}
DISAS_INSN(addsubq)
{
TCGv src;
TCGv dest;
TCGv val;
int imm;
TCGv addr;
int opsize;
if ((insn & 070) == 010) {
/* Operation on address register is always long. */
opsize = OS_LONG;
} else {
opsize = insn_opsize(insn);
}
SRC_EA(env, src, opsize, 1, &addr);
imm = (insn >> 9) & 7;
if (imm == 0) {
imm = 8;
}
val = tcg_const_i32(imm);
dest = tcg_temp_new();
tcg_gen_mov_i32(dest, src);
if ((insn & 0x38) == 0x08) {
/* Don't update condition codes if the destination is an
address register. */
if (insn & 0x0100) {
tcg_gen_sub_i32(dest, dest, val);
} else {
tcg_gen_add_i32(dest, dest, val);
}
} else {
if (insn & 0x0100) {
tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, val);
tcg_gen_sub_i32(dest, dest, val);
set_cc_op(s, CC_OP_SUBB + opsize);
} else {
tcg_gen_add_i32(dest, dest, val);
tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, val);
set_cc_op(s, CC_OP_ADDB + opsize);
}
gen_update_cc_add(dest, val, opsize);
}
tcg_temp_free(val);
DEST_EA(env, insn, opsize, dest, &addr);
tcg_temp_free(dest);
}
DISAS_INSN(tpf)
{
switch (insn & 7) {
case 2: /* One extension word. */
s->pc += 2;
break;
case 3: /* Two extension words. */
s->pc += 4;
break;
case 4: /* No extension words. */
break;
default:
disas_undef(env, s, insn);
}
}
DISAS_INSN(branch)
{
int32_t offset;
uint32_t base;
int op;
TCGLabel *l1;
base = s->pc;
op = (insn >> 8) & 0xf;
offset = (int8_t)insn;
if (offset == 0) {
offset = (int16_t)read_im16(env, s);
} else if (offset == -1) {
offset = read_im32(env, s);
}
if (op == 1) {
/* bsr */
gen_push(s, tcg_const_i32(s->pc));
}
if (op > 1) {
/* Bcc */
l1 = gen_new_label();
gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1);
gen_jmp_tb(s, 1, base + offset);
gen_set_label(l1);
gen_jmp_tb(s, 0, s->pc);
} else {
/* Unconditional branch. */
update_cc_op(s);
gen_jmp_tb(s, 0, base + offset);
}
}
DISAS_INSN(moveq)
{
tcg_gen_movi_i32(DREG(insn, 9), (int8_t)insn);
gen_logic_cc(s, DREG(insn, 9), OS_LONG);
}
DISAS_INSN(mvzs)
{
int opsize;
TCGv src;
TCGv reg;
if (insn & 0x40)
opsize = OS_WORD;
else
opsize = OS_BYTE;
SRC_EA(env, src, opsize, (insn & 0x80) == 0, NULL);
reg = DREG(insn, 9);
tcg_gen_mov_i32(reg, src);
gen_logic_cc(s, src, opsize);
}
DISAS_INSN(or)
{
TCGv reg;
TCGv dest;
TCGv src;
TCGv addr;
int opsize;
opsize = insn_opsize(insn);
reg = gen_extend(DREG(insn, 9), opsize, 0);
dest = tcg_temp_new();
if (insn & 0x100) {
SRC_EA(env, src, opsize, 0, &addr);
tcg_gen_or_i32(dest, src, reg);
DEST_EA(env, insn, opsize, dest, &addr);
} else {
SRC_EA(env, src, opsize, 0, NULL);
tcg_gen_or_i32(dest, src, reg);
gen_partset_reg(opsize, DREG(insn, 9), dest);
}
gen_logic_cc(s, dest, opsize);
tcg_temp_free(dest);
}
DISAS_INSN(suba)
{
TCGv src;
TCGv reg;
SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL);
reg = AREG(insn, 9);
tcg_gen_sub_i32(reg, reg, src);
}
static inline void gen_subx(DisasContext *s, TCGv src, TCGv dest, int opsize)
{
TCGv tmp;
gen_flush_flags(s); /* compute old Z */
/* Perform substract with borrow.
* (X, N) = dest - (src + X);
*/
tmp = tcg_const_i32(0);
tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, src, tmp, QREG_CC_X, tmp);
tcg_gen_sub2_i32(QREG_CC_N, QREG_CC_X, dest, tmp, QREG_CC_N, QREG_CC_X);
gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
tcg_gen_andi_i32(QREG_CC_X, QREG_CC_X, 1);
/* Compute signed-overflow for substract. */
tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, dest);
tcg_gen_xor_i32(tmp, dest, src);
tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, tmp);
tcg_temp_free(tmp);
/* Copy the rest of the results into place. */
tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
set_cc_op(s, CC_OP_FLAGS);
/* result is in QREG_CC_N */
}
DISAS_INSN(subx_reg)
{
TCGv dest;
TCGv src;
int opsize;
opsize = insn_opsize(insn);
src = gen_extend(DREG(insn, 0), opsize, 1);
dest = gen_extend(DREG(insn, 9), opsize, 1);
gen_subx(s, src, dest, opsize);
gen_partset_reg(opsize, DREG(insn, 9), QREG_CC_N);
}
DISAS_INSN(subx_mem)
{
TCGv src;
TCGv addr_src;
TCGv dest;
TCGv addr_dest;
int opsize;
opsize = insn_opsize(insn);
addr_src = AREG(insn, 0);
tcg_gen_subi_i32(addr_src, addr_src, opsize);
src = gen_load(s, opsize, addr_src, 1, IS_USER(s));
addr_dest = AREG(insn, 9);
tcg_gen_subi_i32(addr_dest, addr_dest, opsize);
dest = gen_load(s, opsize, addr_dest, 1, IS_USER(s));
gen_subx(s, src, dest, opsize);
gen_store(s, opsize, addr_dest, QREG_CC_N, IS_USER(s));
}
DISAS_INSN(mov3q)
{
TCGv src;
int val;
val = (insn >> 9) & 7;
if (val == 0)
val = -1;
src = tcg_const_i32(val);
gen_logic_cc(s, src, OS_LONG);
DEST_EA(env, insn, OS_LONG, src, NULL);
tcg_temp_free(src);
}
DISAS_INSN(cmp)
{
TCGv src;
TCGv reg;
int opsize;
opsize = insn_opsize(insn);
SRC_EA(env, src, opsize, 1, NULL);
reg = gen_extend(DREG(insn, 9), opsize, 1);
gen_update_cc_cmp(s, reg, src, opsize);
}
DISAS_INSN(cmpa)
{
int opsize;
TCGv src;
TCGv reg;
if (insn & 0x100) {
opsize = OS_LONG;
} else {
opsize = OS_WORD;
}
SRC_EA(env, src, opsize, 1, NULL);
reg = AREG(insn, 9);
gen_update_cc_cmp(s, reg, src, OS_LONG);
}
DISAS_INSN(cmpm)
{
int opsize = insn_opsize(insn);
TCGv src, dst;
/* Post-increment load (mode 3) from Ay. */
src = gen_ea_mode(env, s, 3, REG(insn, 0), opsize,
NULL_QREG, NULL, EA_LOADS, IS_USER(s));
/* Post-increment load (mode 3) from Ax. */
dst = gen_ea_mode(env, s, 3, REG(insn, 9), opsize,
NULL_QREG, NULL, EA_LOADS, IS_USER(s));
gen_update_cc_cmp(s, dst, src, opsize);
}
DISAS_INSN(eor)
{
TCGv src;
TCGv dest;
TCGv addr;
int opsize;
opsize = insn_opsize(insn);
SRC_EA(env, src, opsize, 0, &addr);
dest = tcg_temp_new();
tcg_gen_xor_i32(dest, src, DREG(insn, 9));
gen_logic_cc(s, dest, opsize);
DEST_EA(env, insn, opsize, dest, &addr);
tcg_temp_free(dest);
}
static void do_exg(TCGv reg1, TCGv reg2)
{
TCGv temp = tcg_temp_new();
tcg_gen_mov_i32(temp, reg1);
tcg_gen_mov_i32(reg1, reg2);
tcg_gen_mov_i32(reg2, temp);
tcg_temp_free(temp);
}
DISAS_INSN(exg_dd)
{
/* exchange Dx and Dy */
do_exg(DREG(insn, 9), DREG(insn, 0));
}
DISAS_INSN(exg_aa)
{
/* exchange Ax and Ay */
do_exg(AREG(insn, 9), AREG(insn, 0));
}
DISAS_INSN(exg_da)
{
/* exchange Dx and Ay */
do_exg(DREG(insn, 9), AREG(insn, 0));
}
DISAS_INSN(and)
{
TCGv src;
TCGv reg;
TCGv dest;
TCGv addr;
int opsize;
dest = tcg_temp_new();
opsize = insn_opsize(insn);
reg = DREG(insn, 9);
if (insn & 0x100) {
SRC_EA(env, src, opsize, 0, &addr);
tcg_gen_and_i32(dest, src, reg);
DEST_EA(env, insn, opsize, dest, &addr);
} else {
SRC_EA(env, src, opsize, 0, NULL);
tcg_gen_and_i32(dest, src, reg);
gen_partset_reg(opsize, reg, dest);
}
gen_logic_cc(s, dest, opsize);
tcg_temp_free(dest);
}
DISAS_INSN(adda)
{
TCGv src;
TCGv reg;
SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL);
reg = AREG(insn, 9);
tcg_gen_add_i32(reg, reg, src);
}
static inline void gen_addx(DisasContext *s, TCGv src, TCGv dest, int opsize)
{
TCGv tmp;
gen_flush_flags(s); /* compute old Z */
/* Perform addition with carry.
* (X, N) = src + dest + X;
*/
tmp = tcg_const_i32(0);
tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, QREG_CC_X, tmp, dest, tmp);
tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, QREG_CC_N, QREG_CC_X, src, tmp);
gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
/* Compute signed-overflow for addition. */
tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, src);
tcg_gen_xor_i32(tmp, dest, src);
tcg_gen_andc_i32(QREG_CC_V, QREG_CC_V, tmp);
tcg_temp_free(tmp);
/* Copy the rest of the results into place. */
tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
set_cc_op(s, CC_OP_FLAGS);
/* result is in QREG_CC_N */
}
DISAS_INSN(addx_reg)
{
TCGv dest;
TCGv src;
int opsize;
opsize = insn_opsize(insn);
dest = gen_extend(DREG(insn, 9), opsize, 1);
src = gen_extend(DREG(insn, 0), opsize, 1);
gen_addx(s, src, dest, opsize);
gen_partset_reg(opsize, DREG(insn, 9), QREG_CC_N);
}
DISAS_INSN(addx_mem)
{
TCGv src;
TCGv addr_src;
TCGv dest;
TCGv addr_dest;
int opsize;
opsize = insn_opsize(insn);
addr_src = AREG(insn, 0);
tcg_gen_subi_i32(addr_src, addr_src, opsize_bytes(opsize));
src = gen_load(s, opsize, addr_src, 1, IS_USER(s));
addr_dest = AREG(insn, 9);
tcg_gen_subi_i32(addr_dest, addr_dest, opsize_bytes(opsize));
dest = gen_load(s, opsize, addr_dest, 1, IS_USER(s));
gen_addx(s, src, dest, opsize);
gen_store(s, opsize, addr_dest, QREG_CC_N, IS_USER(s));
}
static inline void shift_im(DisasContext *s, uint16_t insn, int opsize)
{
int count = (insn >> 9) & 7;
int logical = insn & 8;
int left = insn & 0x100;
int bits = opsize_bytes(opsize) * 8;
TCGv reg = gen_extend(DREG(insn, 0), opsize, !logical);
if (count == 0) {
count = 8;
}
tcg_gen_movi_i32(QREG_CC_V, 0);
if (left) {
tcg_gen_shri_i32(QREG_CC_C, reg, bits - count);
tcg_gen_shli_i32(QREG_CC_N, reg, count);
/* Note that ColdFire always clears V (done above),
while M68000 sets if the most significant bit is changed at
any time during the shift operation */
if (!logical && m68k_feature(s->env, M68K_FEATURE_M68000)) {
/* if shift count >= bits, V is (reg != 0) */
if (count >= bits) {
tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, reg, QREG_CC_V);
} else {
TCGv t0 = tcg_temp_new();
tcg_gen_sari_i32(QREG_CC_V, reg, bits - 1);
tcg_gen_sari_i32(t0, reg, bits - count - 1);
tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, QREG_CC_V, t0);
tcg_temp_free(t0);
}
tcg_gen_neg_i32(QREG_CC_V, QREG_CC_V);
}
} else {
tcg_gen_shri_i32(QREG_CC_C, reg, count - 1);
if (logical) {
tcg_gen_shri_i32(QREG_CC_N, reg, count);
} else {
tcg_gen_sari_i32(QREG_CC_N, reg, count);
}
}
gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1);
tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C);
gen_partset_reg(opsize, DREG(insn, 0), QREG_CC_N);
set_cc_op(s, CC_OP_FLAGS);
}
static inline void shift_reg(DisasContext *s, uint16_t insn, int opsize)
{
int logical = insn & 8;
int left = insn & 0x100;
int bits = opsize_bytes(opsize) * 8;
TCGv reg = gen_extend(DREG(insn, 0), opsize, !logical);
TCGv s32;
TCGv_i64 t64, s64;
t64 = tcg_temp_new_i64();
s64 = tcg_temp_new_i64();
s32 = tcg_temp_new();
/* Note that m68k truncates the shift count modulo 64, not 32.
In addition, a 64-bit shift makes it easy to find "the last
bit shifted out", for the carry flag. */
tcg_gen_andi_i32(s32, DREG(insn, 9), 63);
tcg_gen_extu_i32_i64(s64, s32);
tcg_gen_extu_i32_i64(t64, reg);
/* Optimistically set V=0. Also used as a zero source below. */
tcg_gen_movi_i32(QREG_CC_V, 0);
if (left) {
tcg_gen_shl_i64(t64, t64, s64);
if (opsize == OS_LONG) {
tcg_gen_extr_i64_i32(QREG_CC_N, QREG_CC_C, t64);
/* Note that C=0 if shift count is 0, and we get that for free. */
} else {
TCGv zero = tcg_const_i32(0);
tcg_gen_extrl_i64_i32(QREG_CC_N, t64);
tcg_gen_shri_i32(QREG_CC_C, QREG_CC_N, bits);
tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
s32, zero, zero, QREG_CC_C);
tcg_temp_free(zero);
}
tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1);
/* X = C, but only if the shift count was non-zero. */
tcg_gen_movcond_i32(TCG_COND_NE, QREG_CC_X, s32, QREG_CC_V,
QREG_CC_C, QREG_CC_X);
/* M68000 sets V if the most significant bit is changed at
* any time during the shift operation. Do this via creating
* an extension of the sign bit, comparing, and discarding
* the bits below the sign bit. I.e.
* int64_t s = (intN_t)reg;
* int64_t t = (int64_t)(intN_t)reg << count;
* V = ((s ^ t) & (-1 << (bits - 1))) != 0
*/
if (!logical && m68k_feature(s->env, M68K_FEATURE_M68000)) {
TCGv_i64 tt = tcg_const_i64(32);
/* if shift is greater than 32, use 32 */
tcg_gen_movcond_i64(TCG_COND_GT, s64, s64, tt, tt, s64);
tcg_temp_free_i64(tt);
/* Sign extend the input to 64 bits; re-do the shift. */
tcg_gen_ext_i32_i64(t64, reg);
tcg_gen_shl_i64(s64, t64, s64);
/* Clear all bits that are unchanged. */
tcg_gen_xor_i64(t64, t64, s64);
/* Ignore the bits below the sign bit. */
tcg_gen_andi_i64(t64, t64, -1ULL << (bits - 1));
/* If any bits remain set, we have overflow. */
tcg_gen_setcondi_i64(TCG_COND_NE, t64, t64, 0);
tcg_gen_extrl_i64_i32(QREG_CC_V, t64);
tcg_gen_neg_i32(QREG_CC_V, QREG_CC_V);
}
} else {
tcg_gen_shli_i64(t64, t64, 32);
if (logical) {
tcg_gen_shr_i64(t64, t64, s64);
} else {
tcg_gen_sar_i64(t64, t64, s64);
}
tcg_gen_extr_i64_i32(QREG_CC_C, QREG_CC_N, t64);
/* Note that C=0 if shift count is 0, and we get that for free. */
tcg_gen_shri_i32(QREG_CC_C, QREG_CC_C, 31);
/* X = C, but only if the shift count was non-zero. */
tcg_gen_movcond_i32(TCG_COND_NE, QREG_CC_X, s32, QREG_CC_V,
QREG_CC_C, QREG_CC_X);
}
gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
tcg_temp_free(s32);
tcg_temp_free_i64(s64);
tcg_temp_free_i64(t64);
/* Write back the result. */
gen_partset_reg(opsize, DREG(insn, 0), QREG_CC_N);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(shift8_im)
{
shift_im(s, insn, OS_BYTE);
}
DISAS_INSN(shift16_im)
{
shift_im(s, insn, OS_WORD);
}
DISAS_INSN(shift_im)
{
shift_im(s, insn, OS_LONG);
}
DISAS_INSN(shift8_reg)
{
shift_reg(s, insn, OS_BYTE);
}
DISAS_INSN(shift16_reg)
{
shift_reg(s, insn, OS_WORD);
}
DISAS_INSN(shift_reg)
{
shift_reg(s, insn, OS_LONG);
}
DISAS_INSN(shift_mem)
{
int logical = insn & 8;
int left = insn & 0x100;
TCGv src;
TCGv addr;
SRC_EA(env, src, OS_WORD, !logical, &addr);
tcg_gen_movi_i32(QREG_CC_V, 0);
if (left) {
tcg_gen_shri_i32(QREG_CC_C, src, 15);
tcg_gen_shli_i32(QREG_CC_N, src, 1);
/* Note that ColdFire always clears V,
while M68000 sets if the most significant bit is changed at
any time during the shift operation */
if (!logical && m68k_feature(s->env, M68K_FEATURE_M68000)) {
src = gen_extend(src, OS_WORD, 1);
tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, src);
}
} else {
tcg_gen_mov_i32(QREG_CC_C, src);
if (logical) {
tcg_gen_shri_i32(QREG_CC_N, src, 1);
} else {
tcg_gen_sari_i32(QREG_CC_N, src, 1);
}
}
gen_ext(QREG_CC_N, QREG_CC_N, OS_WORD, 1);
tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1);
tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C);
DEST_EA(env, insn, OS_WORD, QREG_CC_N, &addr);
set_cc_op(s, CC_OP_FLAGS);
}
static void rotate(TCGv reg, TCGv shift, int left, int size)
{
switch (size) {
case 8:
/* Replicate the 8-bit input so that a 32-bit rotate works. */
tcg_gen_ext8u_i32(reg, reg);
tcg_gen_muli_i32(reg, reg, 0x01010101);
goto do_long;
case 16:
/* Replicate the 16-bit input so that a 32-bit rotate works. */
tcg_gen_deposit_i32(reg, reg, reg, 16, 16);
goto do_long;
do_long:
default:
if (left) {
tcg_gen_rotl_i32(reg, reg, shift);
} else {
tcg_gen_rotr_i32(reg, reg, shift);
}
}
/* compute flags */
switch (size) {
case 8:
tcg_gen_ext8s_i32(reg, reg);
break;
case 16:
tcg_gen_ext16s_i32(reg, reg);
break;
default:
break;
}
/* QREG_CC_X is not affected */
tcg_gen_mov_i32(QREG_CC_N, reg);
tcg_gen_mov_i32(QREG_CC_Z, reg);
if (left) {
tcg_gen_andi_i32(QREG_CC_C, reg, 1);
} else {
tcg_gen_shri_i32(QREG_CC_C, reg, 31);
}
tcg_gen_movi_i32(QREG_CC_V, 0); /* always cleared */
}
static void rotate_x_flags(TCGv reg, TCGv X, int size)
{
switch (size) {
case 8:
tcg_gen_ext8s_i32(reg, reg);
break;
case 16:
tcg_gen_ext16s_i32(reg, reg);
break;
default:
break;
}
tcg_gen_mov_i32(QREG_CC_N, reg);
tcg_gen_mov_i32(QREG_CC_Z, reg);
tcg_gen_mov_i32(QREG_CC_X, X);
tcg_gen_mov_i32(QREG_CC_C, X);
tcg_gen_movi_i32(QREG_CC_V, 0);
}
/* Result of rotate_x() is valid if 0 <= shift <= size */
static TCGv rotate_x(TCGv reg, TCGv shift, int left, int size)
{
TCGv X, shl, shr, shx, sz, zero;
sz = tcg_const_i32(size);
shr = tcg_temp_new();
shl = tcg_temp_new();
shx = tcg_temp_new();
if (left) {
tcg_gen_mov_i32(shl, shift); /* shl = shift */
tcg_gen_movi_i32(shr, size + 1);
tcg_gen_sub_i32(shr, shr, shift); /* shr = size + 1 - shift */
tcg_gen_subi_i32(shx, shift, 1); /* shx = shift - 1 */
/* shx = shx < 0 ? size : shx; */
zero = tcg_const_i32(0);
tcg_gen_movcond_i32(TCG_COND_LT, shx, shx, zero, sz, shx);
tcg_temp_free(zero);
} else {
tcg_gen_mov_i32(shr, shift); /* shr = shift */
tcg_gen_movi_i32(shl, size + 1);
tcg_gen_sub_i32(shl, shl, shift); /* shl = size + 1 - shift */
tcg_gen_sub_i32(shx, sz, shift); /* shx = size - shift */
}
/* reg = (reg << shl) | (reg >> shr) | (x << shx); */
tcg_gen_shl_i32(shl, reg, shl);
tcg_gen_shr_i32(shr, reg, shr);
tcg_gen_or_i32(reg, shl, shr);
tcg_temp_free(shl);
tcg_temp_free(shr);
tcg_gen_shl_i32(shx, QREG_CC_X, shx);
tcg_gen_or_i32(reg, reg, shx);
tcg_temp_free(shx);
/* X = (reg >> size) & 1 */
X = tcg_temp_new();
tcg_gen_shr_i32(X, reg, sz);
tcg_gen_andi_i32(X, X, 1);
tcg_temp_free(sz);
return X;
}
/* Result of rotate32_x() is valid if 0 <= shift < 33 */
static TCGv rotate32_x(TCGv reg, TCGv shift, int left)
{
TCGv_i64 t0, shift64;
TCGv X, lo, hi, zero;
shift64 = tcg_temp_new_i64();
tcg_gen_extu_i32_i64(shift64, shift);
t0 = tcg_temp_new_i64();
X = tcg_temp_new();
lo = tcg_temp_new();
hi = tcg_temp_new();
if (left) {
/* create [reg:X:..] */
tcg_gen_shli_i32(lo, QREG_CC_X, 31);
tcg_gen_concat_i32_i64(t0, lo, reg);
/* rotate */
tcg_gen_rotl_i64(t0, t0, shift64);
tcg_temp_free_i64(shift64);
/* result is [reg:..:reg:X] */
tcg_gen_extr_i64_i32(lo, hi, t0);
tcg_gen_andi_i32(X, lo, 1);
tcg_gen_shri_i32(lo, lo, 1);
} else {
/* create [..:X:reg] */
tcg_gen_concat_i32_i64(t0, reg, QREG_CC_X);
tcg_gen_rotr_i64(t0, t0, shift64);
tcg_temp_free_i64(shift64);
/* result is value: [X:reg:..:reg] */
tcg_gen_extr_i64_i32(lo, hi, t0);
/* extract X */
tcg_gen_shri_i32(X, hi, 31);
/* extract result */
tcg_gen_shli_i32(hi, hi, 1);
}
tcg_temp_free_i64(t0);
tcg_gen_or_i32(lo, lo, hi);
tcg_temp_free(hi);
/* if shift == 0, register and X are not affected */
zero = tcg_const_i32(0);
tcg_gen_movcond_i32(TCG_COND_EQ, X, shift, zero, QREG_CC_X, X);
tcg_gen_movcond_i32(TCG_COND_EQ, reg, shift, zero, reg, lo);
tcg_temp_free(zero);
tcg_temp_free(lo);
return X;
}
DISAS_INSN(rotate_im)
{
TCGv shift;
int tmp;
int left = (insn & 0x100);
tmp = (insn >> 9) & 7;
if (tmp == 0) {
tmp = 8;
}
shift = tcg_const_i32(tmp);
if (insn & 8) {
rotate(DREG(insn, 0), shift, left, 32);
} else {
TCGv X = rotate32_x(DREG(insn, 0), shift, left);
rotate_x_flags(DREG(insn, 0), X, 32);
tcg_temp_free(X);
}
tcg_temp_free(shift);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(rotate8_im)
{
int left = (insn & 0x100);
TCGv reg;
TCGv shift;
int tmp;
reg = gen_extend(DREG(insn, 0), OS_BYTE, 0);
tmp = (insn >> 9) & 7;
if (tmp == 0) {
tmp = 8;
}
shift = tcg_const_i32(tmp);
if (insn & 8) {
rotate(reg, shift, left, 8);
} else {
TCGv X = rotate_x(reg, shift, left, 8);
rotate_x_flags(reg, X, 8);
tcg_temp_free(X);
}
tcg_temp_free(shift);
gen_partset_reg(OS_BYTE, DREG(insn, 0), reg);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(rotate16_im)
{
int left = (insn & 0x100);
TCGv reg;
TCGv shift;
int tmp;
reg = gen_extend(DREG(insn, 0), OS_WORD, 0);
tmp = (insn >> 9) & 7;
if (tmp == 0) {
tmp = 8;
}
shift = tcg_const_i32(tmp);
if (insn & 8) {
rotate(reg, shift, left, 16);
} else {
TCGv X = rotate_x(reg, shift, left, 16);
rotate_x_flags(reg, X, 16);
tcg_temp_free(X);
}
tcg_temp_free(shift);
gen_partset_reg(OS_WORD, DREG(insn, 0), reg);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(rotate_reg)
{
TCGv reg;
TCGv src;
TCGv t0, t1;
int left = (insn & 0x100);
reg = DREG(insn, 0);
src = DREG(insn, 9);
/* shift in [0..63] */
t0 = tcg_temp_new();
tcg_gen_andi_i32(t0, src, 63);
t1 = tcg_temp_new_i32();
if (insn & 8) {
tcg_gen_andi_i32(t1, src, 31);
rotate(reg, t1, left, 32);
/* if shift == 0, clear C */
tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
t0, QREG_CC_V /* 0 */,
QREG_CC_V /* 0 */, QREG_CC_C);
} else {
TCGv X;
/* modulo 33 */
tcg_gen_movi_i32(t1, 33);
tcg_gen_remu_i32(t1, t0, t1);
X = rotate32_x(DREG(insn, 0), t1, left);
rotate_x_flags(DREG(insn, 0), X, 32);
tcg_temp_free(X);
}
tcg_temp_free(t1);
tcg_temp_free(t0);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(rotate8_reg)
{
TCGv reg;
TCGv src;
TCGv t0, t1;
int left = (insn & 0x100);
reg = gen_extend(DREG(insn, 0), OS_BYTE, 0);
src = DREG(insn, 9);
/* shift in [0..63] */
t0 = tcg_temp_new_i32();
tcg_gen_andi_i32(t0, src, 63);
t1 = tcg_temp_new_i32();
if (insn & 8) {
tcg_gen_andi_i32(t1, src, 7);
rotate(reg, t1, left, 8);
/* if shift == 0, clear C */
tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
t0, QREG_CC_V /* 0 */,
QREG_CC_V /* 0 */, QREG_CC_C);
} else {
TCGv X;
/* modulo 9 */
tcg_gen_movi_i32(t1, 9);
tcg_gen_remu_i32(t1, t0, t1);
X = rotate_x(reg, t1, left, 8);
rotate_x_flags(reg, X, 8);
tcg_temp_free(X);
}
tcg_temp_free(t1);
tcg_temp_free(t0);
gen_partset_reg(OS_BYTE, DREG(insn, 0), reg);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(rotate16_reg)
{
TCGv reg;
TCGv src;
TCGv t0, t1;
int left = (insn & 0x100);
reg = gen_extend(DREG(insn, 0), OS_WORD, 0);
src = DREG(insn, 9);
/* shift in [0..63] */
t0 = tcg_temp_new_i32();
tcg_gen_andi_i32(t0, src, 63);
t1 = tcg_temp_new_i32();
if (insn & 8) {
tcg_gen_andi_i32(t1, src, 15);
rotate(reg, t1, left, 16);
/* if shift == 0, clear C */
tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
t0, QREG_CC_V /* 0 */,
QREG_CC_V /* 0 */, QREG_CC_C);
} else {
TCGv X;
/* modulo 17 */
tcg_gen_movi_i32(t1, 17);
tcg_gen_remu_i32(t1, t0, t1);
X = rotate_x(reg, t1, left, 16);
rotate_x_flags(reg, X, 16);
tcg_temp_free(X);
}
tcg_temp_free(t1);
tcg_temp_free(t0);
gen_partset_reg(OS_WORD, DREG(insn, 0), reg);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(rotate_mem)
{
TCGv src;
TCGv addr;
TCGv shift;
int left = (insn & 0x100);
SRC_EA(env, src, OS_WORD, 0, &addr);
shift = tcg_const_i32(1);
if (insn & 0x0200) {
rotate(src, shift, left, 16);
} else {
TCGv X = rotate_x(src, shift, left, 16);
rotate_x_flags(src, X, 16);
tcg_temp_free(X);
}
tcg_temp_free(shift);
DEST_EA(env, insn, OS_WORD, src, &addr);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(bfext_reg)
{
int ext = read_im16(env, s);
int is_sign = insn & 0x200;
TCGv src = DREG(insn, 0);
TCGv dst = DREG(ext, 12);
int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
int ofs = extract32(ext, 6, 5); /* big bit-endian */
int pos = 32 - ofs - len; /* little bit-endian */
TCGv tmp = tcg_temp_new();
TCGv shift;
/* In general, we're going to rotate the field so that it's at the
top of the word and then right-shift by the compliment of the
width to extend the field. */
if (ext & 0x20) {
/* Variable width. */
if (ext & 0x800) {
/* Variable offset. */
tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
tcg_gen_rotl_i32(tmp, src, tmp);
} else {
tcg_gen_rotli_i32(tmp, src, ofs);
}
shift = tcg_temp_new();
tcg_gen_neg_i32(shift, DREG(ext, 0));
tcg_gen_andi_i32(shift, shift, 31);
tcg_gen_sar_i32(QREG_CC_N, tmp, shift);
if (is_sign) {
tcg_gen_mov_i32(dst, QREG_CC_N);
} else {
tcg_gen_shr_i32(dst, tmp, shift);
}
tcg_temp_free(shift);
} else {
/* Immediate width. */
if (ext & 0x800) {
/* Variable offset */
tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
tcg_gen_rotl_i32(tmp, src, tmp);
src = tmp;
pos = 32 - len;
} else {
/* Immediate offset. If the field doesn't wrap around the
end of the word, rely on (s)extract completely. */
if (pos < 0) {
tcg_gen_rotli_i32(tmp, src, ofs);
src = tmp;
pos = 32 - len;
}
}
tcg_gen_sextract_i32(QREG_CC_N, src, pos, len);
if (is_sign) {
tcg_gen_mov_i32(dst, QREG_CC_N);
} else {
tcg_gen_extract_i32(dst, src, pos, len);
}
}
tcg_temp_free(tmp);
set_cc_op(s, CC_OP_LOGIC);
}
DISAS_INSN(bfext_mem)
{
int ext = read_im16(env, s);
int is_sign = insn & 0x200;
TCGv dest = DREG(ext, 12);
TCGv addr, len, ofs;
addr = gen_lea(env, s, insn, OS_UNSIZED);
if (IS_NULL_QREG(addr)) {
gen_addr_fault(s);
return;
}
if (ext & 0x20) {
len = DREG(ext, 0);
} else {
len = tcg_const_i32(extract32(ext, 0, 5));
}
if (ext & 0x800) {
ofs = DREG(ext, 6);
} else {
ofs = tcg_const_i32(extract32(ext, 6, 5));
}
if (is_sign) {
gen_helper_bfexts_mem(dest, cpu_env, addr, ofs, len);
tcg_gen_mov_i32(QREG_CC_N, dest);
} else {
TCGv_i64 tmp = tcg_temp_new_i64();
gen_helper_bfextu_mem(tmp, cpu_env, addr, ofs, len);
tcg_gen_extr_i64_i32(dest, QREG_CC_N, tmp);
tcg_temp_free_i64(tmp);
}
set_cc_op(s, CC_OP_LOGIC);
if (!(ext & 0x20)) {
tcg_temp_free(len);
}
if (!(ext & 0x800)) {
tcg_temp_free(ofs);
}
}
DISAS_INSN(bfop_reg)
{
int ext = read_im16(env, s);
TCGv src = DREG(insn, 0);
int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
int ofs = extract32(ext, 6, 5); /* big bit-endian */
TCGv mask, tofs, tlen;
tofs = NULL;
tlen = NULL;
if ((insn & 0x0f00) == 0x0d00) { /* bfffo */
tofs = tcg_temp_new();
tlen = tcg_temp_new();
}
if ((ext & 0x820) == 0) {
/* Immediate width and offset. */
uint32_t maski = 0x7fffffffu >> (len - 1);
if (ofs + len <= 32) {
tcg_gen_shli_i32(QREG_CC_N, src, ofs);
} else {
tcg_gen_rotli_i32(QREG_CC_N, src, ofs);
}
tcg_gen_andi_i32(QREG_CC_N, QREG_CC_N, ~maski);
mask = tcg_const_i32(ror32(maski, ofs));
if (tofs) {
tcg_gen_movi_i32(tofs, ofs);
tcg_gen_movi_i32(tlen, len);
}
} else {
TCGv tmp = tcg_temp_new();
if (ext & 0x20) {
/* Variable width */
tcg_gen_subi_i32(tmp, DREG(ext, 0), 1);
tcg_gen_andi_i32(tmp, tmp, 31);
mask = tcg_const_i32(0x7fffffffu);
tcg_gen_shr_i32(mask, mask, tmp);
if (tlen) {
tcg_gen_addi_i32(tlen, tmp, 1);
}
} else {
/* Immediate width */
mask = tcg_const_i32(0x7fffffffu >> (len - 1));
if (tlen) {
tcg_gen_movi_i32(tlen, len);
}
}
if (ext & 0x800) {
/* Variable offset */
tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
tcg_gen_rotl_i32(QREG_CC_N, src, tmp);
tcg_gen_andc_i32(QREG_CC_N, QREG_CC_N, mask);
tcg_gen_rotr_i32(mask, mask, tmp);
if (tofs) {
tcg_gen_mov_i32(tofs, tmp);
}
} else {
/* Immediate offset (and variable width) */
tcg_gen_rotli_i32(QREG_CC_N, src, ofs);
tcg_gen_andc_i32(QREG_CC_N, QREG_CC_N, mask);
tcg_gen_rotri_i32(mask, mask, ofs);
if (tofs) {
tcg_gen_movi_i32(tofs, ofs);
}
}
tcg_temp_free(tmp);
}
set_cc_op(s, CC_OP_LOGIC);
switch (insn & 0x0f00) {
case 0x0a00: /* bfchg */
tcg_gen_eqv_i32(src, src, mask);
break;
case 0x0c00: /* bfclr */
tcg_gen_and_i32(src, src, mask);
break;
case 0x0d00: /* bfffo */
gen_helper_bfffo_reg(DREG(ext, 12), QREG_CC_N, tofs, tlen);
tcg_temp_free(tlen);
tcg_temp_free(tofs);
break;
case 0x0e00: /* bfset */
tcg_gen_orc_i32(src, src, mask);
break;
case 0x0800: /* bftst */
/* flags already set; no other work to do. */
break;
default:
g_assert_not_reached();
}
tcg_temp_free(mask);
}
DISAS_INSN(bfop_mem)
{
int ext = read_im16(env, s);
TCGv addr, len, ofs;
TCGv_i64 t64;
addr = gen_lea(env, s, insn, OS_UNSIZED);
if (IS_NULL_QREG(addr)) {
gen_addr_fault(s);
return;
}
if (ext & 0x20) {
len = DREG(ext, 0);
} else {
len = tcg_const_i32(extract32(ext, 0, 5));
}
if (ext & 0x800) {
ofs = DREG(ext, 6);
} else {
ofs = tcg_const_i32(extract32(ext, 6, 5));
}
switch (insn & 0x0f00) {
case 0x0a00: /* bfchg */
gen_helper_bfchg_mem(QREG_CC_N, cpu_env, addr, ofs, len);
break;
case 0x0c00: /* bfclr */
gen_helper_bfclr_mem(QREG_CC_N, cpu_env, addr, ofs, len);
break;
case 0x0d00: /* bfffo */
t64 = tcg_temp_new_i64();
gen_helper_bfffo_mem(t64, cpu_env, addr, ofs, len);
tcg_gen_extr_i64_i32(DREG(ext, 12), QREG_CC_N, t64);
tcg_temp_free_i64(t64);
break;
case 0x0e00: /* bfset */
gen_helper_bfset_mem(QREG_CC_N, cpu_env, addr, ofs, len);
break;
case 0x0800: /* bftst */
gen_helper_bfexts_mem(QREG_CC_N, cpu_env, addr, ofs, len);
break;
default:
g_assert_not_reached();
}
set_cc_op(s, CC_OP_LOGIC);
if (!(ext & 0x20)) {
tcg_temp_free(len);
}
if (!(ext & 0x800)) {
tcg_temp_free(ofs);
}
}
DISAS_INSN(bfins_reg)
{
int ext = read_im16(env, s);
TCGv dst = DREG(insn, 0);
TCGv src = DREG(ext, 12);
int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
int ofs = extract32(ext, 6, 5); /* big bit-endian */
int pos = 32 - ofs - len; /* little bit-endian */
TCGv tmp;
tmp = tcg_temp_new();
if (ext & 0x20) {
/* Variable width */
tcg_gen_neg_i32(tmp, DREG(ext, 0));
tcg_gen_andi_i32(tmp, tmp, 31);
tcg_gen_shl_i32(QREG_CC_N, src, tmp);
} else {
/* Immediate width */
tcg_gen_shli_i32(QREG_CC_N, src, 32 - len);
}
set_cc_op(s, CC_OP_LOGIC);
/* Immediate width and offset */
if ((ext & 0x820) == 0) {
/* Check for suitability for deposit. */
if (pos >= 0) {
tcg_gen_deposit_i32(dst, dst, src, pos, len);
} else {
uint32_t maski = -2U << (len - 1);
uint32_t roti = (ofs + len) & 31;
tcg_gen_andi_i32(tmp, src, ~maski);
tcg_gen_rotri_i32(tmp, tmp, roti);
tcg_gen_andi_i32(dst, dst, ror32(maski, roti));
tcg_gen_or_i32(dst, dst, tmp);
}
} else {
TCGv mask = tcg_temp_new();
TCGv rot = tcg_temp_new();
if (ext & 0x20) {
/* Variable width */
tcg_gen_subi_i32(rot, DREG(ext, 0), 1);
tcg_gen_andi_i32(rot, rot, 31);
tcg_gen_movi_i32(mask, -2);
tcg_gen_shl_i32(mask, mask, rot);
tcg_gen_mov_i32(rot, DREG(ext, 0));
tcg_gen_andc_i32(tmp, src, mask);
} else {
/* Immediate width (variable offset) */
uint32_t maski = -2U << (len - 1);
tcg_gen_andi_i32(tmp, src, ~maski);
tcg_gen_movi_i32(mask, maski);
tcg_gen_movi_i32(rot, len & 31);
}
if (ext & 0x800) {
/* Variable offset */
tcg_gen_add_i32(rot, rot, DREG(ext, 6));
} else {
/* Immediate offset (variable width) */
tcg_gen_addi_i32(rot, rot, ofs);
}
tcg_gen_andi_i32(rot, rot, 31);
tcg_gen_rotr_i32(mask, mask, rot);
tcg_gen_rotr_i32(tmp, tmp, rot);
tcg_gen_and_i32(dst, dst, mask);
tcg_gen_or_i32(dst, dst, tmp);
tcg_temp_free(rot);
tcg_temp_free(mask);
}
tcg_temp_free(tmp);
}
DISAS_INSN(bfins_mem)
{
int ext = read_im16(env, s);
TCGv src = DREG(ext, 12);
TCGv addr, len, ofs;
addr = gen_lea(env, s, insn, OS_UNSIZED);
if (IS_NULL_QREG(addr)) {
gen_addr_fault(s);
return;
}
if (ext & 0x20) {
len = DREG(ext, 0);
} else {
len = tcg_const_i32(extract32(ext, 0, 5));
}
if (ext & 0x800) {
ofs = DREG(ext, 6);
} else {
ofs = tcg_const_i32(extract32(ext, 6, 5));
}
gen_helper_bfins_mem(QREG_CC_N, cpu_env, addr, src, ofs, len);
set_cc_op(s, CC_OP_LOGIC);
if (!(ext & 0x20)) {
tcg_temp_free(len);
}
if (!(ext & 0x800)) {
tcg_temp_free(ofs);
}
}
DISAS_INSN(ff1)
{
TCGv reg;
reg = DREG(insn, 0);
gen_logic_cc(s, reg, OS_LONG);
gen_helper_ff1(reg, reg);
}
DISAS_INSN(chk)
{
TCGv src, reg;
int opsize;
switch ((insn >> 7) & 3) {
case 3:
opsize = OS_WORD;
break;
case 2:
if (m68k_feature(env, M68K_FEATURE_CHK2)) {
opsize = OS_LONG;
break;
}
/* fallthru */
default:
gen_exception(s, s->insn_pc, EXCP_ILLEGAL);
return;
}
SRC_EA(env, src, opsize, 1, NULL);
reg = gen_extend(DREG(insn, 9), opsize, 1);
gen_flush_flags(s);
gen_helper_chk(cpu_env, reg, src);
}
DISAS_INSN(chk2)
{
uint16_t ext;
TCGv addr1, addr2, bound1, bound2, reg;
int opsize;
switch ((insn >> 9) & 3) {
case 0:
opsize = OS_BYTE;
break;
case 1:
opsize = OS_WORD;
break;
case 2:
opsize = OS_LONG;
break;
default:
gen_exception(s, s->insn_pc, EXCP_ILLEGAL);
return;
}
ext = read_im16(env, s);
if ((ext & 0x0800) == 0) {
gen_exception(s, s->insn_pc, EXCP_ILLEGAL);
return;
}
addr1 = gen_lea(env, s, insn, OS_UNSIZED);
addr2 = tcg_temp_new();
tcg_gen_addi_i32(addr2, addr1, opsize_bytes(opsize));
bound1 = gen_load(s, opsize, addr1, 1, IS_USER(s));
tcg_temp_free(addr1);
bound2 = gen_load(s, opsize, addr2, 1, IS_USER(s));
tcg_temp_free(addr2);
reg = tcg_temp_new();
if (ext & 0x8000) {
tcg_gen_mov_i32(reg, AREG(ext, 12));
} else {
gen_ext(reg, DREG(ext, 12), opsize, 1);
}
gen_flush_flags(s);
gen_helper_chk2(cpu_env, reg, bound1, bound2);
tcg_temp_free(reg);
}
static void m68k_copy_line(TCGv dst, TCGv src, int index)
{
TCGv addr;
TCGv_i64 t0, t1;
addr = tcg_temp_new();
t0 = tcg_temp_new_i64();
t1 = tcg_temp_new_i64();
tcg_gen_andi_i32(addr, src, ~15);
tcg_gen_qemu_ld64(t0, addr, index);
tcg_gen_addi_i32(addr, addr, 8);
tcg_gen_qemu_ld64(t1, addr, index);
tcg_gen_andi_i32(addr, dst, ~15);
tcg_gen_qemu_st64(t0, addr, index);
tcg_gen_addi_i32(addr, addr, 8);
tcg_gen_qemu_st64(t1, addr, index);
tcg_temp_free_i64(t0);
tcg_temp_free_i64(t1);
tcg_temp_free(addr);
}
DISAS_INSN(move16_reg)
{
int index = IS_USER(s);
TCGv tmp;
uint16_t ext;
ext = read_im16(env, s);
if ((ext & (1 << 15)) == 0) {
gen_exception(s, s->insn_pc, EXCP_ILLEGAL);
}
m68k_copy_line(AREG(ext, 12), AREG(insn, 0), index);
/* Ax can be Ay, so save Ay before incrementing Ax */
tmp = tcg_temp_new();
tcg_gen_mov_i32(tmp, AREG(ext, 12));
tcg_gen_addi_i32(AREG(insn, 0), AREG(insn, 0), 16);
tcg_gen_addi_i32(AREG(ext, 12), tmp, 16);
tcg_temp_free(tmp);
}
DISAS_INSN(move16_mem)
{
int index = IS_USER(s);
TCGv reg, addr;
reg = AREG(insn, 0);
addr = tcg_const_i32(read_im32(env, s));
if ((insn >> 3) & 1) {
/* MOVE16 (xxx).L, (Ay) */
m68k_copy_line(reg, addr, index);
} else {
/* MOVE16 (Ay), (xxx).L */
m68k_copy_line(addr, reg, index);
}
tcg_temp_free(addr);
if (((insn >> 3) & 2) == 0) {
/* (Ay)+ */
tcg_gen_addi_i32(reg, reg, 16);
}
}
DISAS_INSN(strldsr)
{
uint16_t ext;
uint32_t addr;
addr = s->pc - 2;
ext = read_im16(env, s);
if (ext != 0x46FC) {
gen_exception(s, addr, EXCP_UNSUPPORTED);
return;
}
ext = read_im16(env, s);
if (IS_USER(s) || (ext & SR_S) == 0) {
gen_exception(s, addr, EXCP_PRIVILEGE);
return;
}
gen_push(s, gen_get_sr(s));
gen_set_sr_im(s, ext, 0);
}
DISAS_INSN(move_from_sr)
{
TCGv sr;
if (IS_USER(s) && !m68k_feature(env, M68K_FEATURE_M68000)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
sr = gen_get_sr(s);
DEST_EA(env, insn, OS_WORD, sr, NULL);
}
#if defined(CONFIG_SOFTMMU)
DISAS_INSN(moves)
{
int opsize;
uint16_t ext;
TCGv reg;
TCGv addr;
int extend;
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
ext = read_im16(env, s);
opsize = insn_opsize(insn);
if (ext & 0x8000) {
/* address register */
reg = AREG(ext, 12);
extend = 1;
} else {
/* data register */
reg = DREG(ext, 12);
extend = 0;
}
addr = gen_lea(env, s, insn, opsize);
if (IS_NULL_QREG(addr)) {
gen_addr_fault(s);
return;
}
if (ext & 0x0800) {
/* from reg to ea */
gen_store(s, opsize, addr, reg, DFC_INDEX(s));
} else {
/* from ea to reg */
TCGv tmp = gen_load(s, opsize, addr, 0, SFC_INDEX(s));
if (extend) {
gen_ext(reg, tmp, opsize, 1);
} else {
gen_partset_reg(opsize, reg, tmp);
}
}
switch (extract32(insn, 3, 3)) {
case 3: /* Indirect postincrement. */
tcg_gen_addi_i32(AREG(insn, 0), addr,
REG(insn, 0) == 7 && opsize == OS_BYTE
? 2
: opsize_bytes(opsize));
break;
case 4: /* Indirect predecrememnt. */
tcg_gen_mov_i32(AREG(insn, 0), addr);
break;
}
}
DISAS_INSN(move_to_sr)
{
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
gen_move_to_sr(env, s, insn, false);
gen_lookup_tb(s);
}
DISAS_INSN(move_from_usp)
{
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, 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->insn_pc, EXCP_PRIVILEGE);
return;
}
tcg_gen_st_i32(AREG(insn, 0), cpu_env,
offsetof(CPUM68KState, sp[M68K_USP]));
}
DISAS_INSN(halt)
{
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
gen_exception(s, s->pc, EXCP_HALT_INSN);
}
DISAS_INSN(stop)
{
uint16_t ext;
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
ext = read_im16(env, s);
gen_set_sr_im(s, ext, 0);
tcg_gen_movi_i32(cpu_halted, 1);
gen_exception(s, s->pc, EXCP_HLT);
}
DISAS_INSN(rte)
{
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
gen_exception(s, s->insn_pc, EXCP_RTE);
}
DISAS_INSN(cf_movec)
{
uint16_t ext;
TCGv reg;
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
ext = read_im16(env, s);
if (ext & 0x8000) {
reg = AREG(ext, 12);
} else {
reg = DREG(ext, 12);
}
gen_helper_cf_movec_to(cpu_env, tcg_const_i32(ext & 0xfff), reg);
gen_lookup_tb(s);
}
DISAS_INSN(m68k_movec)
{
uint16_t ext;
TCGv reg;
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
ext = read_im16(env, s);
if (ext & 0x8000) {
reg = AREG(ext, 12);
} else {
reg = DREG(ext, 12);
}
if (insn & 1) {
gen_helper_m68k_movec_to(cpu_env, tcg_const_i32(ext & 0xfff), reg);
} else {
gen_helper_m68k_movec_from(reg, cpu_env, tcg_const_i32(ext & 0xfff));
}
gen_lookup_tb(s);
}
DISAS_INSN(intouch)
{
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
/* ICache fetch. Implement as no-op. */
}
DISAS_INSN(cpushl)
{
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
/* Cache push/invalidate. Implement as no-op. */
}
DISAS_INSN(cpush)
{
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
/* Cache push/invalidate. Implement as no-op. */
}
DISAS_INSN(cinv)
{
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
/* Invalidate cache line. Implement as no-op. */
}
#if defined(CONFIG_SOFTMMU)
DISAS_INSN(pflush)
{
TCGv opmode;
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
opmode = tcg_const_i32((insn >> 3) & 3);
gen_helper_pflush(cpu_env, AREG(insn, 0), opmode);
tcg_temp_free(opmode);
}
DISAS_INSN(ptest)
{
TCGv is_read;
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
is_read = tcg_const_i32((insn >> 5) & 1);
gen_helper_ptest(cpu_env, AREG(insn, 0), is_read);
tcg_temp_free(is_read);
}
#endif
DISAS_INSN(wddata)
{
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
}
DISAS_INSN(wdebug)
{
M68kCPU *cpu = m68k_env_get_cpu(env);
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
/* TODO: Implement wdebug. */
cpu_abort(CPU(cpu), "WDEBUG not implemented");
}
#endif
DISAS_INSN(trap)
{
gen_exception(s, s->insn_pc, EXCP_TRAP0 + (insn & 0xf));
}
static void gen_load_fcr(DisasContext *s, TCGv res, int reg)
{
switch (reg) {
case M68K_FPIAR:
tcg_gen_movi_i32(res, 0);
break;
case M68K_FPSR:
tcg_gen_ld_i32(res, cpu_env, offsetof(CPUM68KState, fpsr));
break;
case M68K_FPCR:
tcg_gen_ld_i32(res, cpu_env, offsetof(CPUM68KState, fpcr));
break;
}
}
static void gen_store_fcr(DisasContext *s, TCGv val, int reg)
{
switch (reg) {
case M68K_FPIAR:
break;
case M68K_FPSR:
tcg_gen_st_i32(val, cpu_env, offsetof(CPUM68KState, fpsr));
break;
case M68K_FPCR:
gen_helper_set_fpcr(cpu_env, val);
break;
}
}
static void gen_qemu_store_fcr(DisasContext *s, TCGv addr, int reg)
{
int index = IS_USER(s);
TCGv tmp;
tmp = tcg_temp_new();
gen_load_fcr(s, tmp, reg);
tcg_gen_qemu_st32(tmp, addr, index);
tcg_temp_free(tmp);
}
static void gen_qemu_load_fcr(DisasContext *s, TCGv addr, int reg)
{
int index = IS_USER(s);
TCGv tmp;
tmp = tcg_temp_new();
tcg_gen_qemu_ld32u(tmp, addr, index);
gen_store_fcr(s, tmp, reg);
tcg_temp_free(tmp);
}
static void gen_op_fmove_fcr(CPUM68KState *env, DisasContext *s,
uint32_t insn, uint32_t ext)
{
int mask = (ext >> 10) & 7;
int is_write = (ext >> 13) & 1;
int mode = extract32(insn, 3, 3);
int i;
TCGv addr, tmp;
switch (mode) {
case 0: /* Dn */
if (mask != M68K_FPIAR && mask != M68K_FPSR && mask != M68K_FPCR) {
gen_exception(s, s->insn_pc, EXCP_ILLEGAL);
return;
}
if (is_write) {
gen_load_fcr(s, DREG(insn, 0), mask);
} else {
gen_store_fcr(s, DREG(insn, 0), mask);
}
return;
case 1: /* An, only with FPIAR */
if (mask != M68K_FPIAR) {
gen_exception(s, s->insn_pc, EXCP_ILLEGAL);
return;
}
if (is_write) {
gen_load_fcr(s, AREG(insn, 0), mask);
} else {
gen_store_fcr(s, AREG(insn, 0), mask);
}
return;
default:
break;
}
tmp = gen_lea(env, s, insn, OS_LONG);
if (IS_NULL_QREG(tmp)) {
gen_addr_fault(s);
return;
}
addr = tcg_temp_new();
tcg_gen_mov_i32(addr, tmp);
/* mask:
*
* 0b100 Floating-Point Control Register
* 0b010 Floating-Point Status Register
* 0b001 Floating-Point Instruction Address Register
*
*/
if (is_write && mode == 4) {
for (i = 2; i >= 0; i--, mask >>= 1) {
if (mask & 1) {
gen_qemu_store_fcr(s, addr, 1 << i);
if (mask != 1) {
tcg_gen_subi_i32(addr, addr, opsize_bytes(OS_LONG));
}
}
}
tcg_gen_mov_i32(AREG(insn, 0), addr);
} else {
for (i = 0; i < 3; i++, mask >>= 1) {
if (mask & 1) {
if (is_write) {
gen_qemu_store_fcr(s, addr, 1 << i);
} else {
gen_qemu_load_fcr(s, addr, 1 << i);
}
if (mask != 1 || mode == 3) {
tcg_gen_addi_i32(addr, addr, opsize_bytes(OS_LONG));
}
}
}
if (mode == 3) {
tcg_gen_mov_i32(AREG(insn, 0), addr);
}
}
tcg_temp_free_i32(addr);
}
static void gen_op_fmovem(CPUM68KState *env, DisasContext *s,
uint32_t insn, uint32_t ext)
{
int opsize;
TCGv addr, tmp;
int mode = (ext >> 11) & 0x3;
int is_load = ((ext & 0x2000) == 0);
if (m68k_feature(s->env, M68K_FEATURE_FPU)) {
opsize = OS_EXTENDED;
} else {
opsize = OS_DOUBLE; /* FIXME */
}
addr = gen_lea(env, s, insn, opsize);
if (IS_NULL_QREG(addr)) {
gen_addr_fault(s);
return;
}
tmp = tcg_temp_new();
if (mode & 0x1) {
/* Dynamic register list */
tcg_gen_ext8u_i32(tmp, DREG(ext, 4));
} else {
/* Static register list */
tcg_gen_movi_i32(tmp, ext & 0xff);
}
if (!is_load && (mode & 2) == 0) {
/* predecrement addressing mode
* only available to store register to memory
*/
if (opsize == OS_EXTENDED) {
gen_helper_fmovemx_st_predec(tmp, cpu_env, addr, tmp);
} else {
gen_helper_fmovemd_st_predec(tmp, cpu_env, addr, tmp);
}
} else {
/* postincrement addressing mode */
if (opsize == OS_EXTENDED) {
if (is_load) {
gen_helper_fmovemx_ld_postinc(tmp, cpu_env, addr, tmp);
} else {
gen_helper_fmovemx_st_postinc(tmp, cpu_env, addr, tmp);
}
} else {
if (is_load) {
gen_helper_fmovemd_ld_postinc(tmp, cpu_env, addr, tmp);
} else {
gen_helper_fmovemd_st_postinc(tmp, cpu_env, addr, tmp);
}
}
}
if ((insn & 070) == 030 || (insn & 070) == 040) {
tcg_gen_mov_i32(AREG(insn, 0), tmp);
}
tcg_temp_free(tmp);
}
/* ??? FP exceptions are not implemented. Most exceptions are deferred until
immediately before the next FP instruction is executed. */
DISAS_INSN(fpu)
{
uint16_t ext;
int opmode;
int opsize;
TCGv_ptr cpu_src, cpu_dest;
ext = read_im16(env, s);
opmode = ext & 0x7f;
switch ((ext >> 13) & 7) {
case 0:
break;
case 1:
goto undef;
case 2:
if (insn == 0xf200 && (ext & 0xfc00) == 0x5c00) {
/* fmovecr */
TCGv rom_offset = tcg_const_i32(opmode);
cpu_dest = gen_fp_ptr(REG(ext, 7));
gen_helper_fconst(cpu_env, cpu_dest, rom_offset);
tcg_temp_free_ptr(cpu_dest);
tcg_temp_free(rom_offset);
return;
}
break;
case 3: /* fmove out */
cpu_src = gen_fp_ptr(REG(ext, 7));
opsize = ext_opsize(ext, 10);
if (gen_ea_fp(env, s, insn, opsize, cpu_src,
EA_STORE, IS_USER(s)) == -1) {
gen_addr_fault(s);
}
gen_helper_ftst(cpu_env, cpu_src);
tcg_temp_free_ptr(cpu_src);
return;
case 4: /* fmove to control register. */
case 5: /* fmove from control register. */
gen_op_fmove_fcr(env, s, insn, ext);
return;
case 6: /* fmovem */
case 7:
if ((ext & 0x1000) == 0 && !m68k_feature(s->env, M68K_FEATURE_FPU)) {
goto undef;
}
gen_op_fmovem(env, s, insn, ext);
return;
}
if (ext & (1 << 14)) {
/* Source effective address. */
opsize = ext_opsize(ext, 10);
cpu_src = gen_fp_result_ptr();
if (gen_ea_fp(env, s, insn, opsize, cpu_src,
EA_LOADS, IS_USER(s)) == -1) {
gen_addr_fault(s);
return;
}
} else {
/* Source register. */
opsize = OS_EXTENDED;
cpu_src = gen_fp_ptr(REG(ext, 10));
}
cpu_dest = gen_fp_ptr(REG(ext, 7));
switch (opmode) {
case 0: /* fmove */
gen_fp_move(cpu_dest, cpu_src);
break;
case 0x40: /* fsmove */
gen_helper_fsround(cpu_env, cpu_dest, cpu_src);
break;
case 0x44: /* fdmove */
gen_helper_fdround(cpu_env, cpu_dest, cpu_src);
break;
case 1: /* fint */
gen_helper_firound(cpu_env, cpu_dest, cpu_src);
break;
case 3: /* fintrz */
gen_helper_fitrunc(cpu_env, cpu_dest, cpu_src);
break;
case 4: /* fsqrt */
gen_helper_fsqrt(cpu_env, cpu_dest, cpu_src);
break;
case 0x41: /* fssqrt */
gen_helper_fssqrt(cpu_env, cpu_dest, cpu_src);
break;
case 0x45: /* fdsqrt */
gen_helper_fdsqrt(cpu_env, cpu_dest, cpu_src);
break;
case 0x18: /* fabs */
gen_helper_fabs(cpu_env, cpu_dest, cpu_src);
break;
case 0x58: /* fsabs */
gen_helper_fsabs(cpu_env, cpu_dest, cpu_src);
break;
case 0x5c: /* fdabs */
gen_helper_fdabs(cpu_env, cpu_dest, cpu_src);
break;
case 0x1a: /* fneg */
gen_helper_fneg(cpu_env, cpu_dest, cpu_src);
break;
case 0x5a: /* fsneg */
gen_helper_fsneg(cpu_env, cpu_dest, cpu_src);
break;
case 0x5e: /* fdneg */
gen_helper_fdneg(cpu_env, cpu_dest, cpu_src);
break;
case 0x20: /* fdiv */
gen_helper_fdiv(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x60: /* fsdiv */
gen_helper_fsdiv(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x64: /* fddiv */
gen_helper_fddiv(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x22: /* fadd */
gen_helper_fadd(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x62: /* fsadd */
gen_helper_fsadd(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x66: /* fdadd */
gen_helper_fdadd(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x23: /* fmul */
gen_helper_fmul(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x63: /* fsmul */
gen_helper_fsmul(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x67: /* fdmul */
gen_helper_fdmul(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x24: /* fsgldiv */
gen_helper_fsgldiv(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x27: /* fsglmul */
gen_helper_fsglmul(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x28: /* fsub */
gen_helper_fsub(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x68: /* fssub */
gen_helper_fssub(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x6c: /* fdsub */
gen_helper_fdsub(cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x38: /* fcmp */
gen_helper_fcmp(cpu_env, cpu_src, cpu_dest);
return;
case 0x3a: /* ftst */
gen_helper_ftst(cpu_env, cpu_src);
return;
default:
goto undef;
}
tcg_temp_free_ptr(cpu_src);
gen_helper_ftst(cpu_env, cpu_dest);
tcg_temp_free_ptr(cpu_dest);
return;
undef:
/* FIXME: Is this right for offset addressing modes? */
s->pc -= 2;
disas_undef_fpu(env, s, insn);
}
static void gen_fcc_cond(DisasCompare *c, DisasContext *s, int cond)
{
TCGv fpsr;
c->g1 = 1;
c->v2 = tcg_const_i32(0);
c->g2 = 0;
/* TODO: Raise BSUN exception. */
fpsr = tcg_temp_new();
gen_load_fcr(s, fpsr, M68K_FPSR);
switch (cond) {
case 0: /* False */
case 16: /* Signaling False */
c->v1 = c->v2;
c->tcond = TCG_COND_NEVER;
break;
case 1: /* EQual Z */
case 17: /* Signaling EQual Z */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z);
c->tcond = TCG_COND_NE;
break;
case 2: /* Ordered Greater Than !(A || Z || N) */
case 18: /* Greater Than !(A || Z || N) */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr,
FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N);
c->tcond = TCG_COND_EQ;
break;
case 3: /* Ordered Greater than or Equal Z || !(A || N) */
case 19: /* Greater than or Equal Z || !(A || N) */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A);
tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_A));
tcg_gen_andi_i32(fpsr, fpsr, FPSR_CC_Z | FPSR_CC_N);
tcg_gen_or_i32(c->v1, c->v1, fpsr);
tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N);
c->tcond = TCG_COND_NE;
break;
case 4: /* Ordered Less Than !(!N || A || Z); */
case 20: /* Less Than !(!N || A || Z); */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_xori_i32(c->v1, fpsr, FPSR_CC_N);
tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_N | FPSR_CC_A | FPSR_CC_Z);
c->tcond = TCG_COND_EQ;
break;
case 5: /* Ordered Less than or Equal Z || (N && !A) */
case 21: /* Less than or Equal Z || (N && !A) */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A);
tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_A));
tcg_gen_andc_i32(c->v1, fpsr, c->v1);
tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_Z | FPSR_CC_N);
c->tcond = TCG_COND_NE;
break;
case 6: /* Ordered Greater or Less than !(A || Z) */
case 22: /* Greater or Less than !(A || Z) */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z);
c->tcond = TCG_COND_EQ;
break;
case 7: /* Ordered !A */
case 23: /* Greater, Less or Equal !A */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A);
c->tcond = TCG_COND_EQ;
break;
case 8: /* Unordered A */
case 24: /* Not Greater, Less or Equal A */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A);
c->tcond = TCG_COND_NE;
break;
case 9: /* Unordered or Equal A || Z */
case 25: /* Not Greater or Less then A || Z */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z);
c->tcond = TCG_COND_NE;
break;
case 10: /* Unordered or Greater Than A || !(N || Z)) */
case 26: /* Not Less or Equal A || !(N || Z)) */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z);
tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_Z));
tcg_gen_andi_i32(fpsr, fpsr, FPSR_CC_A | FPSR_CC_N);
tcg_gen_or_i32(c->v1, c->v1, fpsr);
tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N);
c->tcond = TCG_COND_NE;
break;
case 11: /* Unordered or Greater or Equal A || Z || !N */
case 27: /* Not Less Than A || Z || !N */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N);
tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N);
c->tcond = TCG_COND_NE;
break;
case 12: /* Unordered or Less Than A || (N && !Z) */
case 28: /* Not Greater than or Equal A || (N && !Z) */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z);
tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_Z));
tcg_gen_andc_i32(c->v1, fpsr, c->v1);
tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_A | FPSR_CC_N);
c->tcond = TCG_COND_NE;
break;
case 13: /* Unordered or Less or Equal A || Z || N */
case 29: /* Not Greater Than A || Z || N */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N);
c->tcond = TCG_COND_NE;
break;
case 14: /* Not Equal !Z */
case 30: /* Signaling Not Equal !Z */
c->v1 = tcg_temp_new();
c->g1 = 0;
tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z);
c->tcond = TCG_COND_EQ;
break;
case 15: /* True */
case 31: /* Signaling True */
c->v1 = c->v2;
c->tcond = TCG_COND_ALWAYS;
break;
}
tcg_temp_free(fpsr);
}
static void gen_fjmpcc(DisasContext *s, int cond, TCGLabel *l1)
{
DisasCompare c;
gen_fcc_cond(&c, s, cond);
update_cc_op(s);
tcg_gen_brcond_i32(c.tcond, c.v1, c.v2, l1);
free_cond(&c);
}
DISAS_INSN(fbcc)
{
uint32_t offset;
uint32_t base;
TCGLabel *l1;
base = s->pc;
offset = (int16_t)read_im16(env, s);
if (insn & (1 << 6)) {
offset = (offset << 16) | read_im16(env, s);
}
l1 = gen_new_label();
update_cc_op(s);
gen_fjmpcc(s, insn & 0x3f, l1);
gen_jmp_tb(s, 0, s->pc);
gen_set_label(l1);
gen_jmp_tb(s, 1, base + offset);
}
DISAS_INSN(fscc)
{
DisasCompare c;
int cond;
TCGv tmp;
uint16_t ext;
ext = read_im16(env, s);
cond = ext & 0x3f;
gen_fcc_cond(&c, s, cond);
tmp = tcg_temp_new();
tcg_gen_setcond_i32(c.tcond, tmp, c.v1, c.v2);
free_cond(&c);
tcg_gen_neg_i32(tmp, tmp);
DEST_EA(env, insn, OS_BYTE, tmp, NULL);
tcg_temp_free(tmp);
}
#if defined(CONFIG_SOFTMMU)
DISAS_INSN(frestore)
{
TCGv addr;
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
if (m68k_feature(s->env, M68K_FEATURE_M68040)) {
SRC_EA(env, addr, OS_LONG, 0, NULL);
/* FIXME: check the state frame */
} else {
disas_undef(env, s, insn);
}
}
DISAS_INSN(fsave)
{
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
if (m68k_feature(s->env, M68K_FEATURE_M68040)) {
/* always write IDLE */
TCGv idle = tcg_const_i32(0x41000000);
DEST_EA(env, insn, OS_LONG, idle, NULL);
tcg_temp_free(idle);
} else {
disas_undef(env, s, insn);
}
}
#endif
static inline TCGv gen_mac_extract_word(DisasContext *s, TCGv val, int upper)
{
TCGv tmp = tcg_temp_new();
if (s->env->macsr & MACSR_FI) {
if (upper)
tcg_gen_andi_i32(tmp, val, 0xffff0000);
else
tcg_gen_shli_i32(tmp, val, 16);
} else if (s->env->macsr & MACSR_SU) {
if (upper)
tcg_gen_sari_i32(tmp, val, 16);
else
tcg_gen_ext16s_i32(tmp, val);
} else {
if (upper)
tcg_gen_shri_i32(tmp, val, 16);
else
tcg_gen_ext16u_i32(tmp, val);
}
return tmp;
}
static void gen_mac_clear_flags(void)
{
tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR,
~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV));
}
DISAS_INSN(mac)
{
TCGv rx;
TCGv ry;
uint16_t ext;
int acc;
TCGv tmp;
TCGv addr;
TCGv loadval;
int dual;
TCGv saved_flags;
if (!s->done_mac) {
s->mactmp = tcg_temp_new_i64();
s->done_mac = 1;
}
ext = read_im16(env, s);
acc = ((insn >> 7) & 1) | ((ext >> 3) & 2);
dual = ((insn & 0x30) != 0 && (ext & 3) != 0);
if (dual && !m68k_feature(s->env, M68K_FEATURE_CF_EMAC_B)) {
disas_undef(env, s, insn);
return;
}
if (insn & 0x30) {
/* MAC with load. */
tmp = gen_lea(env, s, insn, OS_LONG);
addr = tcg_temp_new();
tcg_gen_and_i32(addr, tmp, QREG_MAC_MASK);
/* Load the value now to ensure correct exception behavior.
Perform writeback after reading the MAC inputs. */
loadval = gen_load(s, OS_LONG, addr, 0, IS_USER(s));
acc ^= 1;
rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12);
ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0);
} else {
loadval = addr = NULL_QREG;
rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
}
gen_mac_clear_flags();
#if 0
l1 = -1;
/* Disabled because conditional branches clobber temporary vars. */
if ((s->env->macsr & MACSR_OMC) != 0 && !dual) {
/* Skip the multiply if we know we will ignore it. */
l1 = gen_new_label();
tmp = tcg_temp_new();
tcg_gen_andi_i32(tmp, QREG_MACSR, 1 << (acc + 8));
gen_op_jmp_nz32(tmp, l1);
}
#endif
if ((ext & 0x0800) == 0) {
/* Word. */
rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0);
ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0);
}
if (s->env->macsr & MACSR_FI) {
gen_helper_macmulf(s->mactmp, cpu_env, rx, ry);
} else {
if (s->env->macsr & MACSR_SU)
gen_helper_macmuls(s->mactmp, cpu_env, rx, ry);
else
gen_helper_macmulu(s->mactmp, cpu_env, rx, ry);
switch ((ext >> 9) & 3) {
case 1:
tcg_gen_shli_i64(s->mactmp, s->mactmp, 1);
break;
case 3:
tcg_gen_shri_i64(s->mactmp, s->mactmp, 1);
break;
}
}
if (dual) {
/* Save the overflow flag from the multiply. */
saved_flags = tcg_temp_new();
tcg_gen_mov_i32(saved_flags, QREG_MACSR);
} else {
saved_flags = NULL_QREG;
}
#if 0
/* Disabled because conditional branches clobber temporary vars. */
if ((s->env->macsr & MACSR_OMC) != 0 && dual) {
/* Skip the accumulate if the value is already saturated. */
l1 = gen_new_label();
tmp = tcg_temp_new();
gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
gen_op_jmp_nz32(tmp, l1);
}
#endif
if (insn & 0x100)
tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
else
tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
if (s->env->macsr & MACSR_FI)
gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
else if (s->env->macsr & MACSR_SU)
gen_helper_macsats(cpu_env, tcg_const_i32(acc));
else
gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
#if 0
/* Disabled because conditional branches clobber temporary vars. */
if (l1 != -1)
gen_set_label(l1);
#endif
if (dual) {
/* Dual accumulate variant. */
acc = (ext >> 2) & 3;
/* Restore the overflow flag from the multiplier. */
tcg_gen_mov_i32(QREG_MACSR, saved_flags);
#if 0
/* Disabled because conditional branches clobber temporary vars. */
if ((s->env->macsr & MACSR_OMC) != 0) {
/* Skip the accumulate if the value is already saturated. */
l1 = gen_new_label();
tmp = tcg_temp_new();
gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
gen_op_jmp_nz32(tmp, l1);
}
#endif
if (ext & 2)
tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
else
tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
if (s->env->macsr & MACSR_FI)
gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
else if (s->env->macsr & MACSR_SU)
gen_helper_macsats(cpu_env, tcg_const_i32(acc));
else
gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
#if 0
/* Disabled because conditional branches clobber temporary vars. */
if (l1 != -1)
gen_set_label(l1);
#endif
}
gen_helper_mac_set_flags(cpu_env, tcg_const_i32(acc));
if (insn & 0x30) {
TCGv rw;
rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
tcg_gen_mov_i32(rw, loadval);
/* FIXME: Should address writeback happen with the masked or
unmasked value? */
switch ((insn >> 3) & 7) {
case 3: /* Post-increment. */
tcg_gen_addi_i32(AREG(insn, 0), addr, 4);
break;
case 4: /* Pre-decrement. */
tcg_gen_mov_i32(AREG(insn, 0), addr);
}
}
}
DISAS_INSN(from_mac)
{
TCGv rx;
TCGv_i64 acc;
int accnum;
rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
accnum = (insn >> 9) & 3;
acc = MACREG(accnum);
if (s->env->macsr & MACSR_FI) {
gen_helper_get_macf(rx, cpu_env, acc);
} else if ((s->env->macsr & MACSR_OMC) == 0) {
tcg_gen_extrl_i64_i32(rx, acc);
} else if (s->env->macsr & MACSR_SU) {
gen_helper_get_macs(rx, acc);
} else {
gen_helper_get_macu(rx, acc);
}
if (insn & 0x40) {
tcg_gen_movi_i64(acc, 0);
tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
}
}
DISAS_INSN(move_mac)
{
/* FIXME: This can be done without a helper. */
int src;
TCGv dest;
src = insn & 3;
dest = tcg_const_i32((insn >> 9) & 3);
gen_helper_mac_move(cpu_env, dest, tcg_const_i32(src));
gen_mac_clear_flags();
gen_helper_mac_set_flags(cpu_env, dest);
}
DISAS_INSN(from_macsr)
{
TCGv reg;
reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
tcg_gen_mov_i32(reg, QREG_MACSR);
}
DISAS_INSN(from_mask)
{
TCGv reg;
reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
tcg_gen_mov_i32(reg, QREG_MAC_MASK);
}
DISAS_INSN(from_mext)
{
TCGv reg;
TCGv acc;
reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
if (s->env->macsr & MACSR_FI)
gen_helper_get_mac_extf(reg, cpu_env, acc);
else
gen_helper_get_mac_exti(reg, cpu_env, acc);
}
DISAS_INSN(macsr_to_ccr)
{
TCGv tmp = tcg_temp_new();
tcg_gen_andi_i32(tmp, QREG_MACSR, 0xf);
gen_helper_set_sr(cpu_env, tmp);
tcg_temp_free(tmp);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(to_mac)
{
TCGv_i64 acc;
TCGv val;
int accnum;
accnum = (insn >> 9) & 3;
acc = MACREG(accnum);
SRC_EA(env, val, OS_LONG, 0, NULL);
if (s->env->macsr & MACSR_FI) {
tcg_gen_ext_i32_i64(acc, val);
tcg_gen_shli_i64(acc, acc, 8);
} else if (s->env->macsr & MACSR_SU) {
tcg_gen_ext_i32_i64(acc, val);
} else {
tcg_gen_extu_i32_i64(acc, val);
}
tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
gen_mac_clear_flags();
gen_helper_mac_set_flags(cpu_env, tcg_const_i32(accnum));
}
DISAS_INSN(to_macsr)
{
TCGv val;
SRC_EA(env, val, OS_LONG, 0, NULL);
gen_helper_set_macsr(cpu_env, val);
gen_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)
{
/* Build the opcode table only once to avoid
multithreading issues. */
if (opcode_table[0] != NULL) {
return;
}
/* use BASE() for instruction available
* for CF_ISA_A and M68000.
*/
#define BASE(name, opcode, mask) \
register_opcode(disas_##name, 0x##opcode, 0x##mask)
#define INSN(name, opcode, mask, feature) do { \
if (m68k_feature(env, M68K_FEATURE_##feature)) \
BASE(name, opcode, mask); \
} while(0)
BASE(undef, 0000, 0000);
INSN(arith_im, 0080, fff8, CF_ISA_A);
INSN(arith_im, 0000, ff00, M68000);
INSN(chk2, 00c0, f9c0, CHK2);
INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC);
BASE(bitop_reg, 0100, f1c0);
BASE(bitop_reg, 0140, f1c0);
BASE(bitop_reg, 0180, f1c0);
BASE(bitop_reg, 01c0, f1c0);
INSN(movep, 0108, f138, MOVEP);
INSN(arith_im, 0280, fff8, CF_ISA_A);
INSN(arith_im, 0200, ff00, M68000);
INSN(undef, 02c0, ffc0, M68000);
INSN(byterev, 02c0, fff8, CF_ISA_APLUSC);
INSN(arith_im, 0480, fff8, CF_ISA_A);
INSN(arith_im, 0400, ff00, M68000);
INSN(undef, 04c0, ffc0, M68000);
INSN(arith_im, 0600, ff00, M68000);
INSN(undef, 06c0, ffc0, M68000);
INSN(ff1, 04c0, fff8, CF_ISA_APLUSC);
INSN(arith_im, 0680, fff8, CF_ISA_A);
INSN(arith_im, 0c00, ff38, CF_ISA_A);
INSN(arith_im, 0c00, ff00, M68000);
BASE(bitop_im, 0800, ffc0);
BASE(bitop_im, 0840, ffc0);
BASE(bitop_im, 0880, ffc0);
BASE(bitop_im, 08c0, ffc0);
INSN(arith_im, 0a80, fff8, CF_ISA_A);
INSN(arith_im, 0a00, ff00, M68000);
#if defined(CONFIG_SOFTMMU)
INSN(moves, 0e00, ff00, M68000);
#endif
INSN(cas, 0ac0, ffc0, CAS);
INSN(cas, 0cc0, ffc0, CAS);
INSN(cas, 0ec0, ffc0, CAS);
INSN(cas2w, 0cfc, ffff, CAS);
INSN(cas2l, 0efc, ffff, CAS);
BASE(move, 1000, f000);
BASE(move, 2000, f000);
BASE(move, 3000, f000);
INSN(chk, 4000, f040, M68000);
INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC);
INSN(negx, 4080, fff8, CF_ISA_A);
INSN(negx, 4000, ff00, M68000);
INSN(undef, 40c0, ffc0, M68000);
INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
INSN(move_from_sr, 40c0, ffc0, M68000);
BASE(lea, 41c0, f1c0);
BASE(clr, 4200, ff00);
BASE(undef, 42c0, ffc0);
INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
INSN(move_from_ccr, 42c0, ffc0, M68000);
INSN(neg, 4480, fff8, CF_ISA_A);
INSN(neg, 4400, ff00, M68000);
INSN(undef, 44c0, ffc0, M68000);
BASE(move_to_ccr, 44c0, ffc0);
INSN(not, 4680, fff8, CF_ISA_A);
INSN(not, 4600, ff00, M68000);
#if defined(CONFIG_SOFTMMU)
BASE(move_to_sr, 46c0, ffc0);
#endif
INSN(nbcd, 4800, ffc0, M68000);
INSN(linkl, 4808, fff8, M68000);
BASE(pea, 4840, ffc0);
BASE(swap, 4840, fff8);
INSN(bkpt, 4848, fff8, BKPT);
INSN(movem, 48d0, fbf8, CF_ISA_A);
INSN(movem, 48e8, fbf8, CF_ISA_A);
INSN(movem, 4880, fb80, M68000);
BASE(ext, 4880, fff8);
BASE(ext, 48c0, fff8);
BASE(ext, 49c0, fff8);
BASE(tst, 4a00, ff00);
INSN(tas, 4ac0, ffc0, CF_ISA_B);
INSN(tas, 4ac0, ffc0, M68000);
#if defined(CONFIG_SOFTMMU)
INSN(halt, 4ac8, ffff, CF_ISA_A);
#endif
INSN(pulse, 4acc, ffff, CF_ISA_A);
BASE(illegal, 4afc, ffff);
INSN(mull, 4c00, ffc0, CF_ISA_A);
INSN(mull, 4c00, ffc0, LONG_MULDIV);
INSN(divl, 4c40, ffc0, CF_ISA_A);
INSN(divl, 4c40, ffc0, LONG_MULDIV);
INSN(sats, 4c80, fff8, CF_ISA_B);
BASE(trap, 4e40, fff0);
BASE(link, 4e50, fff8);
BASE(unlk, 4e58, fff8);
#if defined(CONFIG_SOFTMMU)
INSN(move_to_usp, 4e60, fff8, USP);
INSN(move_from_usp, 4e68, fff8, USP);
INSN(reset, 4e70, ffff, M68000);
BASE(stop, 4e72, ffff);
BASE(rte, 4e73, ffff);
INSN(cf_movec, 4e7b, ffff, CF_ISA_A);
INSN(m68k_movec, 4e7a, fffe, M68000);
#endif
BASE(nop, 4e71, ffff);
INSN(rtd, 4e74, ffff, RTD);
BASE(rts, 4e75, ffff);
BASE(jump, 4e80, ffc0);
BASE(jump, 4ec0, ffc0);
INSN(addsubq, 5000, f080, M68000);
BASE(addsubq, 5080, f0c0);
INSN(scc, 50c0, f0f8, CF_ISA_A); /* Scc.B Dx */
INSN(scc, 50c0, f0c0, M68000); /* Scc.B <EA> */
INSN(dbcc, 50c8, f0f8, M68000);
INSN(tpf, 51f8, fff8, CF_ISA_A);
/* Branch instructions. */
BASE(branch, 6000, f000);
/* Disable long branch instructions, then add back the ones we want. */
BASE(undef, 60ff, f0ff); /* All long branches. */
INSN(branch, 60ff, f0ff, CF_ISA_B);
INSN(undef, 60ff, ffff, CF_ISA_B); /* bra.l */
INSN(branch, 60ff, ffff, BRAL);
INSN(branch, 60ff, f0ff, BCCL);
BASE(moveq, 7000, f100);
INSN(mvzs, 7100, f100, CF_ISA_B);
BASE(or, 8000, f000);
BASE(divw, 80c0, f0c0);
INSN(sbcd_reg, 8100, f1f8, M68000);
INSN(sbcd_mem, 8108, f1f8, M68000);
BASE(addsub, 9000, f000);
INSN(undef, 90c0, f0c0, CF_ISA_A);
INSN(subx_reg, 9180, f1f8, CF_ISA_A);
INSN(subx_reg, 9100, f138, M68000);
INSN(subx_mem, 9108, f138, M68000);
INSN(suba, 91c0, f1c0, CF_ISA_A);
INSN(suba, 90c0, f0c0, M68000);
BASE(undef_mac, a000, f000);
INSN(mac, a000, f100, CF_EMAC);
INSN(from_mac, a180, f9b0, CF_EMAC);
INSN(move_mac, a110, f9fc, CF_EMAC);
INSN(from_macsr,a980, f9f0, CF_EMAC);
INSN(from_mask, ad80, fff0, CF_EMAC);
INSN(from_mext, ab80, fbf0, CF_EMAC);
INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC);
INSN(to_mac, a100, f9c0, CF_EMAC);
INSN(to_macsr, a900, ffc0, CF_EMAC);
INSN(to_mext, ab00, fbc0, CF_EMAC);
INSN(to_mask, ad00, ffc0, CF_EMAC);
INSN(mov3q, a140, f1c0, CF_ISA_B);
INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */
INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */
INSN(cmp, b080, f1c0, CF_ISA_A);
INSN(cmpa, b1c0, f1c0, CF_ISA_A);
INSN(cmp, b000, f100, M68000);
INSN(eor, b100, f100, M68000);
INSN(cmpm, b108, f138, M68000);
INSN(cmpa, b0c0, f0c0, M68000);
INSN(eor, b180, f1c0, CF_ISA_A);
BASE(and, c000, f000);
INSN(exg_dd, c140, f1f8, M68000);
INSN(exg_aa, c148, f1f8, M68000);
INSN(exg_da, c188, f1f8, M68000);
BASE(mulw, c0c0, f0c0);
INSN(abcd_reg, c100, f1f8, M68000);
INSN(abcd_mem, c108, f1f8, M68000);
BASE(addsub, d000, f000);
INSN(undef, d0c0, f0c0, CF_ISA_A);
INSN(addx_reg, d180, f1f8, CF_ISA_A);
INSN(addx_reg, d100, f138, M68000);
INSN(addx_mem, d108, f138, M68000);
INSN(adda, d1c0, f1c0, CF_ISA_A);
INSN(adda, d0c0, f0c0, M68000);
INSN(shift_im, e080, f0f0, CF_ISA_A);
INSN(shift_reg, e0a0, f0f0, CF_ISA_A);
INSN(shift8_im, e000, f0f0, M68000);
INSN(shift16_im, e040, f0f0, M68000);
INSN(shift_im, e080, f0f0, M68000);
INSN(shift8_reg, e020, f0f0, M68000);
INSN(shift16_reg, e060, f0f0, M68000);
INSN(shift_reg, e0a0, f0f0, M68000);
INSN(shift_mem, e0c0, fcc0, M68000);
INSN(rotate_im, e090, f0f0, M68000);
INSN(rotate8_im, e010, f0f0, M68000);
INSN(rotate16_im, e050, f0f0, M68000);
INSN(rotate_reg, e0b0, f0f0, M68000);
INSN(rotate8_reg, e030, f0f0, M68000);
INSN(rotate16_reg, e070, f0f0, M68000);
INSN(rotate_mem, e4c0, fcc0, M68000);
INSN(bfext_mem, e9c0, fdc0, BITFIELD); /* bfextu & bfexts */
INSN(bfext_reg, e9c0, fdf8, BITFIELD);
INSN(bfins_mem, efc0, ffc0, BITFIELD);
INSN(bfins_reg, efc0, fff8, BITFIELD);
INSN(bfop_mem, eac0, ffc0, BITFIELD); /* bfchg */
INSN(bfop_reg, eac0, fff8, BITFIELD); /* bfchg */
INSN(bfop_mem, ecc0, ffc0, BITFIELD); /* bfclr */
INSN(bfop_reg, ecc0, fff8, BITFIELD); /* bfclr */
INSN(bfop_mem, edc0, ffc0, BITFIELD); /* bfffo */
INSN(bfop_reg, edc0, fff8, BITFIELD); /* bfffo */
INSN(bfop_mem, eec0, ffc0, BITFIELD); /* bfset */
INSN(bfop_reg, eec0, fff8, BITFIELD); /* bfset */
INSN(bfop_mem, e8c0, ffc0, BITFIELD); /* bftst */
INSN(bfop_reg, e8c0, fff8, BITFIELD); /* bftst */
BASE(undef_fpu, f000, f000);
INSN(fpu, f200, ffc0, CF_FPU);
INSN(fbcc, f280, ffc0, CF_FPU);
INSN(fpu, f200, ffc0, FPU);
INSN(fscc, f240, ffc0, FPU);
INSN(fbcc, f280, ff80, FPU);
#if defined(CONFIG_SOFTMMU)
INSN(frestore, f340, ffc0, CF_FPU);
INSN(fsave, f300, ffc0, CF_FPU);
INSN(frestore, f340, ffc0, FPU);
INSN(fsave, f300, ffc0, FPU);
INSN(intouch, f340, ffc0, CF_ISA_A);
INSN(cpushl, f428, ff38, CF_ISA_A);
INSN(cpush, f420, ff20, M68040);
INSN(cinv, f400, ff20, M68040);
INSN(pflush, f500, ffe0, M68040);
INSN(ptest, f548, ffd8, M68040);
INSN(wddata, fb00, ff00, CF_ISA_A);
INSN(wdebug, fbc0, ffc0, CF_ISA_A);
#endif
INSN(move16_mem, f600, ffe0, M68040);
INSN(move16_reg, f620, fff8, M68040);
#undef INSN
}
/* ??? 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 = read_im16(env, s);
opcode_table[insn](env, s, insn);
do_writebacks(s);
}
/* generate intermediate code for basic block 'tb'. */
void gen_intermediate_code(CPUState *cs, TranslationBlock *tb)
{
CPUM68KState *env = cs->env_ptr;
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->cc_op_synced = 1;
dc->singlestep_enabled = cs->singlestep_enabled;
dc->done_mac = 0;
dc->writeback_mask = 0;
num_insns = 0;
max_insns = tb_cflags(tb) & 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;
tcg_gen_insn_start(dc->pc, dc->cc_op);
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(tb) & 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(tb) & 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) {
update_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:
update_cc_op(dc);
gen_jmp_tb(dc, 0, dc->pc);
break;
default:
case DISAS_JUMP:
case DISAS_UPDATE:
update_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_in_addr_range(pc_start)) {
qemu_log_lock();
qemu_log("----------------\n");
qemu_log("IN: %s\n", lookup_symbol(pc_start));
log_target_disas(cs, pc_start, dc->pc - pc_start);
qemu_log("\n");
qemu_log_unlock();
}
#endif
tb->size = dc->pc - pc_start;
tb->icount = num_insns;
}
static double floatx80_to_double(CPUM68KState *env, uint16_t high, uint64_t low)
{
floatx80 a = { .high = high, .low = low };
union {
float64 f64;
double d;
} u;
u.f64 = floatx80_to_float64(a, &env->fp_status);
return u.d;
}
void m68k_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
int flags)
{
M68kCPU *cpu = M68K_CPU(cs);
CPUM68KState *env = &cpu->env;
int i;
uint16_t sr;
for (i = 0; i < 8; i++) {
cpu_fprintf(f, "D%d = %08x A%d = %08x "
"F%d = %04x %016"PRIx64" (%12g)\n",
i, env->dregs[i], i, env->aregs[i],
i, env->fregs[i].l.upper, env->fregs[i].l.lower,
floatx80_to_double(env, env->fregs[i].l.upper,
env->fregs[i].l.lower));
}
cpu_fprintf (f, "PC = %08x ", env->pc);
sr = env->sr | cpu_m68k_get_ccr(env);
cpu_fprintf(f, "SR = %04x T:%x I:%x %c%c %c%c%c%c%c\n",
sr, (sr & SR_T) >> SR_T_SHIFT, (sr & SR_I) >> SR_I_SHIFT,
(sr & SR_S) ? 'S' : 'U', (sr & SR_M) ? '%' : 'I',
(sr & CCF_X) ? 'X' : '-', (sr & CCF_N) ? 'N' : '-',
(sr & CCF_Z) ? 'Z' : '-', (sr & CCF_V) ? 'V' : '-',
(sr & CCF_C) ? 'C' : '-');
cpu_fprintf(f, "FPSR = %08x %c%c%c%c ", env->fpsr,
(env->fpsr & FPSR_CC_A) ? 'A' : '-',
(env->fpsr & FPSR_CC_I) ? 'I' : '-',
(env->fpsr & FPSR_CC_Z) ? 'Z' : '-',
(env->fpsr & FPSR_CC_N) ? 'N' : '-');
cpu_fprintf(f, "\n "
"FPCR = %04x ", env->fpcr);
switch (env->fpcr & FPCR_PREC_MASK) {
case FPCR_PREC_X:
cpu_fprintf(f, "X ");
break;
case FPCR_PREC_S:
cpu_fprintf(f, "S ");
break;
case FPCR_PREC_D:
cpu_fprintf(f, "D ");
break;
}
switch (env->fpcr & FPCR_RND_MASK) {
case FPCR_RND_N:
cpu_fprintf(f, "RN ");
break;
case FPCR_RND_Z:
cpu_fprintf(f, "RZ ");
break;
case FPCR_RND_M:
cpu_fprintf(f, "RM ");
break;
case FPCR_RND_P:
cpu_fprintf(f, "RP ");
break;
}
cpu_fprintf(f, "\n");
#ifdef CONFIG_SOFTMMU
cpu_fprintf(f, "%sA7(MSP) = %08x %sA7(USP) = %08x %sA7(ISP) = %08x\n",
env->current_sp == M68K_SSP ? "->" : " ", env->sp[M68K_SSP],
env->current_sp == M68K_USP ? "->" : " ", env->sp[M68K_USP],
env->current_sp == M68K_ISP ? "->" : " ", env->sp[M68K_ISP]);
cpu_fprintf(f, "VBR = 0x%08x\n", env->vbr);
cpu_fprintf(f, "SFC = %x DFC %x\n", env->sfc, env->dfc);
cpu_fprintf(f, "SSW %08x TCR %08x URP %08x SRP %08x\n",
env->mmu.ssw, env->mmu.tcr, env->mmu.urp, env->mmu.srp);
cpu_fprintf(f, "DTTR0/1: %08x/%08x ITTR0/1: %08x/%08x\n",
env->mmu.ttr[M68K_DTTR0], env->mmu.ttr[M68K_DTTR1],
env->mmu.ttr[M68K_ITTR0], env->mmu.ttr[M68K_ITTR1]);
cpu_fprintf(f, "MMUSR %08x, fault at %08x\n",
env->mmu.mmusr, env->mmu.ar);
#endif
}
void restore_state_to_opc(CPUM68KState *env, TranslationBlock *tb,
target_ulong *data)
{
int cc_op = data[1];
env->pc = data[0];
if (cc_op != CC_OP_DYNAMIC) {
env->cc_op = cc_op;
}
}
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