Add X86 RORX instruction

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142741 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86CodeEmitter.cpp b/lib/Target/X86/X86CodeEmitter.cpp
index a150604..d94ba33 100644
--- a/lib/Target/X86/X86CodeEmitter.cpp
+++ b/lib/Target/X86/X86CodeEmitter.cpp
@@ -656,6 +656,7 @@
     Need0FPrefix = true;
     break;
   case X86II::T8XD: // F2 0F 38
+  case X86II::TAXD: // F2 0F 3A
   case X86II::XD:   // F2 0F
     MCE.emitByte(0xF2);
     Need0FPrefix = true;
@@ -686,6 +687,7 @@
   case X86II::T8:    // 0F 38
     MCE.emitByte(0x38);
     break;
+  case X86II::TAXD:  // F2 0F 38
   case X86II::TA:    // 0F 3A
     MCE.emitByte(0x3A);
     break;