On 11/04/2015 10:24 PM, Eduardo Habkost wrote:
Accept the clwb instruction (66 0F AE /6) if its corresponding feature
flag is enabled on CPUID[7].
Signed-off-by: Eduardo Habkost <ehabkost@xxxxxxxxxx>
---
target-i386/translate.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/target-i386/translate.c b/target-i386/translate.c
index b400d24..bac1685 100644
--- a/target-i386/translate.c
+++ b/target-i386/translate.c
@@ -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_lea_modrm(env, s, modrm);
You should use gen_nop_modrm here, since we're not going to do anything with
the address. Otherwise,
Reviewed-by: Richard Henderson <rth@xxxxxxxxxxx>
r~
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