Commit 5e1fac2d authored by Eduardo Habkost's avatar Eduardo Habkost
Browse files

target-i386: tcg: Accept clwb instruction 



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

Reviewed-by: default avatarRichard Henderson <rth@twiddle.net>
Signed-off-by: default avatarEduardo Habkost <ehabkost@redhat.com>
parent 4b59f39b

target-i386/translate.c

+12 −1
Original line number Diff line number Diff line
@@ -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 */