Handle XCHG Gb,Eb.


git-svn-id: svn://svn.valgrind.org/vex/trunk@1201 8f6e269a-dfd6-0310-a8e1-e2731360e62c
diff --git a/priv/guest-amd64/toIR.c b/priv/guest-amd64/toIR.c
index e99795c..f2a3904 100644
--- a/priv/guest-amd64/toIR.c
+++ b/priv/guest-amd64/toIR.c
@@ -12723,9 +12723,9 @@
 
    /* ------------------------ XCHG ----------------------- */
 
-//..    case 0x86: /* XCHG Gb,Eb */
-//..       sz = 1;
-//..       /* Fall through ... */
+   case 0x86: /* XCHG Gb,Eb */
+      sz = 1;
+      /* Fall through ... */
    case 0x87: /* XCHG Gv,Ev */
       if (haveF2orF3(pfx)) goto decode_failure;
       modrm = getUChar(delta);