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target-i386: introduce gen_cmovcc1 

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Paolo Bonzini 2012-10-07 17:55:26 +02:00 committed by Richard Henderson
parent cc8b6f5b39
commit f32d3781de
1 changed files with 38 additions and 34 deletions
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72
target-i386/translate.c
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@ -2414,6 +2414,40 @@ static inline void gen_jcc(DisasContext *s, int b,
}
}
static void gen_cmovcc1(CPUX86State *env, DisasContext *s, int ot, int b,
int modrm, int reg)
{
int l1, mod = (modrm >> 6) & 3;
TCGv t0 = tcg_temp_local_new();
if (mod != 3) {
int reg_addr, offset_addr;
gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
gen_op_ld_v(ot + s->mem_index, t0, cpu_A0);
} else {
int rm = (modrm & 7) | REX_B(s);
gen_op_mov_v_reg(ot, t0, rm);
}
l1 = gen_new_label();
gen_jcc1(s, b ^ 1, l1);
switch (ot) {
#ifdef TARGET_X86_64
case OT_LONG:
tcg_gen_mov_tl(cpu_regs[reg], t0);
gen_set_label(l1);
tcg_gen_ext32u_tl(cpu_regs[reg], cpu_regs[reg]);
break;
#endif
default:
gen_op_mov_reg_v(ot, reg, t0);
gen_set_label(l1);
break;
}
tcg_temp_free(t0);
}
static inline void gen_op_movl_T0_seg(int seg_reg)
{
tcg_gen_ld32u_tl(cpu_T[0], cpu_env,
@ -6427,40 +6461,10 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
gen_ldst_modrm(env, s, modrm, OT_BYTE, OR_TMP0, 1);
break;
case 0x140 ... 0x14f: /* cmov Gv, Ev */
{
int l1;
TCGv t0;
ot = dflag + OT_WORD;
modrm = cpu_ldub_code(env, s->pc++);
reg = ((modrm >> 3) & 7) | rex_r;
mod = (modrm >> 6) & 3;
t0 = tcg_temp_local_new();
if (mod != 3) {
gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
gen_op_ld_v(ot + s->mem_index, t0, cpu_A0);
} else {
rm = (modrm & 7) | REX_B(s);
gen_op_mov_v_reg(ot, t0, rm);
}
#ifdef TARGET_X86_64
if (ot == OT_LONG) {
/* XXX: specific Intel behaviour ? */
l1 = gen_new_label();
gen_jcc1(s, b ^ 1, l1);
tcg_gen_mov_tl(cpu_regs[reg], t0);
gen_set_label(l1);
tcg_gen_ext32u_tl(cpu_regs[reg], cpu_regs[reg]);
} else
#endif
{
l1 = gen_new_label();
gen_jcc1(s, b ^ 1, l1);
gen_op_mov_reg_v(ot, reg, t0);
gen_set_label(l1);
}
tcg_temp_free(t0);
}
ot = dflag + OT_WORD;
modrm = cpu_ldub_code(env, s->pc++);
reg = ((modrm >> 3) & 7) | rex_r;
gen_cmovcc1(env, s, ot, b, modrm, reg);
break;
/************************/