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target-i386: tcg: Accept clwb instruction

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Accept the clwb instruction (66 0F AE /6) if its corresponding feature
flag is enabled on CPUID[7].

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Eduardo Habkost 2015-11-04 19:24:45 -02:00
parent 4b59f39bc9
commit 5e1fac2dba
1 changed files with 12 additions and 1 deletions
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13
target-i386/translate.c
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@ -7716,10 +7716,21 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
}
break;
case 5: /* lfence */
case 6: /* mfence */
if ((modrm & 0xc7) != 0xc0 || !(s->cpuid_features & CPUID_SSE2))
goto illegal_op;
break;
case 6: /* mfence/clwb */
if (s->prefix & PREFIX_DATA) {
/* clwb */
if (!(s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_CLWB))
goto illegal_op;
gen_nop_modrm(env, s, modrm);
} else {
/* mfence */
if ((modrm & 0xc7) != 0xc0 || !(s->cpuid_features & CPUID_SSE2))
goto illegal_op;
}
break;
case 7: /* sfence / clflush */
if ((modrm & 0xc7) == 0xc0) {
/* sfence */