Add support for the VIA PadLock instructions.

llvm-svn: 128826
diff --git a/llvm/lib/Target/X86/X86InstrFormats.td b/llvm/lib/Target/X86/X86InstrFormats.td
index cafe37b..7daa264 100644
--- a/llvm/lib/Target/X86/X86InstrFormats.td
+++ b/llvm/lib/Target/X86/X86InstrFormats.td
@@ -105,7 +105,9 @@
 class XS     { bits<5> Prefix = 12; }
 class T8     { bits<5> Prefix = 13; }
 class TA     { bits<5> Prefix = 14; }
-class TF     { bits<5> Prefix = 15; }
+class A6     { bits<5> Prefix = 15; }
+class A7     { bits<5> Prefix = 16; }
+class TF     { bits<5> Prefix = 17; }
 class VEX    { bit hasVEXPrefix = 1; }
 class VEX_W  { bit hasVEX_WPrefix = 1; }
 class VEX_4V : VEX { bit hasVEX_4VPrefix = 1; }