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target-i386: Generate fences for x86

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Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Message-Id: <20160714202026.9727-15-bobby.prani@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Pranith Kumar 2016-07-14 16:20:26 -04:00 committed by Richard Henderson
parent ce1bd93f94
commit cc19e497a0
1 changed files with 8 additions and 0 deletions
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8
target-i386/translate.c
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@ -8012,13 +8012,21 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
|| (prefixes & PREFIX_LOCK)) { || (prefixes & PREFIX_LOCK)) {
goto illegal_op; goto illegal_op;
} }
tcg_gen_mb(TCG_MO_ST_ST | TCG_BAR_SC);
break; break;
case 0xe8 ... 0xef: /* lfence */ case 0xe8 ... 0xef: /* lfence */
if (!(s->cpuid_features & CPUID_SSE)
|| (prefixes & PREFIX_LOCK)) {
goto illegal_op;
}
tcg_gen_mb(TCG_MO_LD_LD | TCG_BAR_SC);
break;
case 0xf0 ... 0xf7: /* mfence */ case 0xf0 ... 0xf7: /* mfence */
if (!(s->cpuid_features & CPUID_SSE2) if (!(s->cpuid_features & CPUID_SSE2)
|| (prefixes & PREFIX_LOCK)) { || (prefixes & PREFIX_LOCK)) {
goto illegal_op; goto illegal_op;
} }
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_SC);
break; break;
default: default: