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target/i386: speedup JO/SETO after MUL or IMUL

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OF is equal to the carry flag, so use the same CCPrepare.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2023-10-25 13:13:13 +02:00
parent 6032627f07
commit 1e7dde8008
1 changed files with 3 additions and 0 deletions
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target/i386/tcg/translate.c
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@ -1020,6 +1020,9 @@ static CCPrepare gen_prepare_eflags_o(DisasContext *s, TCGv reg)
case CC_OP_CLR: case CC_OP_CLR:
case CC_OP_POPCNT: case CC_OP_POPCNT:
return (CCPrepare) { .cond = TCG_COND_NEVER, .mask = -1 }; return (CCPrepare) { .cond = TCG_COND_NEVER, .mask = -1 };
case CC_OP_MULB ... CC_OP_MULQ:
return (CCPrepare) { .cond = TCG_COND_NE,
.reg = cpu_cc_src, .mask = -1 };
default: default:
gen_compute_eflags(s); gen_compute_eflags(s);
return (CCPrepare) { .cond = TCG_COND_NE, .reg = cpu_cc_src, return (CCPrepare) { .cond = TCG_COND_NE, .reg = cpu_cc_src,