diff -r b683f557224b -r 3d62cb85208d src/cpu/x86/vm/assembler_x86_64.cpp
--- a/src/cpu/x86/vm/assembler_x86_64.cpp	Wed Mar 19 15:14:36 2008 -0700
+++ b/src/cpu/x86/vm/assembler_x86_64.cpp	Wed Mar 19 15:33:25 2008 -0700
@@ -3372,6 +3372,21 @@
   emit_byte(0xC0 | encode);
 }
 
+void Assembler::cvtdq2pd(XMMRegister dst, XMMRegister src) {
+  emit_byte(0xF3);
+  int encode = prefix_and_encode(dst->encoding(), src->encoding());
+  emit_byte(0x0F);
+  emit_byte(0xE6);
+  emit_byte(0xC0 | encode);
+}
+
+void Assembler::cvtdq2ps(XMMRegister dst, XMMRegister src) {
+  int encode = prefix_and_encode(dst->encoding(), src->encoding());
+  emit_byte(0x0F);
+  emit_byte(0x5B);
+  emit_byte(0xC0 | encode);
+}
+
 void Assembler::cvtsd2ss(XMMRegister dst, XMMRegister src) {
   emit_byte(0xF2);
   int encode = prefix_and_encode(dst->encoding(), src->encoding());