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target-i386: clean up sahf

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Discard CC_DST and set s->cc_op immediately after computing EFLAGS.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Paolo Bonzini 2012-10-06 00:18:55 +02:00 committed by Richard Henderson
parent f5847c912d
commit 6fa38ed219
1 changed files with 3 additions and 1 deletions
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target-i386/translate.c
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@ -6502,10 +6502,12 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
if (s->cc_op != CC_OP_DYNAMIC) if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op); gen_op_set_cc_op(s->cc_op);
gen_compute_eflags(cpu_cc_src); gen_compute_eflags(cpu_cc_src);
tcg_gen_discard_tl(cpu_cc_dst);
s->cc_op = CC_OP_EFLAGS;
tcg_gen_andi_tl(cpu_cc_src, cpu_cc_src, CC_O); tcg_gen_andi_tl(cpu_cc_src, cpu_cc_src, CC_O);
tcg_gen_andi_tl(cpu_T[0], cpu_T[0], CC_S | CC_Z | CC_A | CC_P | CC_C); tcg_gen_andi_tl(cpu_T[0], cpu_T[0], CC_S | CC_Z | CC_A | CC_P | CC_C);
tcg_gen_or_tl(cpu_cc_src, cpu_cc_src, cpu_T[0]); tcg_gen_or_tl(cpu_cc_src, cpu_cc_src, cpu_T[0]);
s->cc_op = CC_OP_EFLAGS;
break; break;
case 0x9f: /* lahf */ case 0x9f: /* lahf */
if (CODE64(s) && !(s->cpuid_ext3_features & CPUID_EXT3_LAHF_LM)) if (CODE64(s) && !(s->cpuid_ext3_features & CPUID_EXT3_LAHF_LM))