Add a utility method to the ia32 macro assembler to move a double immediate into an XMM register.

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index d2c5c7c78ffb4c1fe7cbfae342849e75bd91b69a..bd35743c742637a0bf5d9a7cf0463814f94c067f 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -850,6 +850,9 @@ class MacroAssembler: public Assembler {
   // Move a constant into a register using the most efficient encoding.
   void Move(Register dst, Immediate imm);
 
+  // Move an immediate into an XMM register.
+  void Move(XMMRegister dst, double val);
+
   // Push a handle value.
   void Push(Handle<Object> handle) { push(Immediate(handle)); }
   void Push(Smi* smi) { Push(Handle<Smi>(smi, isolate())); }