diff -r 8d3cc6612bd1 -r 137868b7aa6f src/cpu/x86/vm/assembler_x86.hpp
--- a/src/cpu/x86/vm/assembler_x86.hpp	Mon Sep 17 17:02:10 2012 -0700
+++ b/src/cpu/x86/vm/assembler_x86.hpp	Mon Sep 17 19:39:07 2012 -0700
@@ -1743,6 +1743,12 @@
   void vinsertf128h(XMMRegister dst, XMMRegister nds, XMMRegister src);
   void vinserti128h(XMMRegister dst, XMMRegister nds, XMMRegister src);
 
+  // Load/store high 128bit of YMM registers which does not destroy other half.
+  void vinsertf128h(XMMRegister dst, Address src);
+  void vinserti128h(XMMRegister dst, Address src);
+  void vextractf128h(Address dst, XMMRegister src);
+  void vextracti128h(Address dst, XMMRegister src);
+
   // AVX instruction which is used to clear upper 128 bits of YMM registers and
   // to avoid transaction penalty between AVX and SSE states. There is no
   // penalty if legacy SSE instructions are encoded using VEX prefix because