--- old/src/cpu/x86/vm/assembler_x86.cpp	2015-02-13 08:28:04.235563436 -0800
+++ new/src/cpu/x86/vm/assembler_x86.cpp	2015-02-13 08:28:04.119564177 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -2577,6 +2577,15 @@
   emit_int8(0x73);
   emit_int8((unsigned char)(0xC0 | encode));
   emit_int8(shift);
+}
+
+void Assembler::pslldq(XMMRegister dst, int shift) {
+  // Shift left 128 bit value in xmm register by number of bytes.
+  NOT_LP64(assert(VM_Version::supports_sse2(), ""));
+  int encode = simd_prefix_and_encode(xmm7, dst, dst, VEX_SIMD_66);
+  emit_int8(0x73);
+  emit_int8((unsigned char)(0xC0 | encode));
+  emit_int8(shift);
 }
 
 void Assembler::ptest(XMMRegister dst, Address src) {