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target/i386/tcg: do not compute all flags for SAHF

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Only OF is needed, the others are overwritten.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2025-11-22 23:02:10 +01:00
parent a71706fc11
commit da7649c6ae
1 changed files with 1 additions and 1 deletions
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target/i386/tcg/emit.c.inc
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@ -3778,7 +3778,7 @@ static void gen_SAHF(DisasContext *s, X86DecodedInsn *decode)
return gen_illegal_opcode(s);
}
tcg_gen_shri_tl(s->T0, cpu_regs[R_EAX], 8);
gen_compute_eflags(s);
gen_neg_setcc(s, JCC_O << 1, cpu_cc_src);
tcg_gen_andi_tl(cpu_cc_src, cpu_cc_src, CC_O);
tcg_gen_andi_tl(s->T0, s->T0, CC_S | CC_Z | CC_A | CC_P | CC_C);
tcg_gen_or_tl(cpu_cc_src, cpu_cc_src, s->T0);