[turbofan] Support for %_DoubleHi, %_DoubleLo and %_ConstructDouble.

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 2f1354bbf99b87d7af1209e62f4c0954096ba1bc..8c135f2b6021c9b71e5dbf3eea44138fedb7c7a3 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -813,6 +813,13 @@ class MacroAssembler: public Assembler {
   void Push(Register src) { push(src); }
   void Pop(Register dst) { pop(dst); }
 
+  // Non-SSE2 instructions.
+  void Pextrd(Register dst, XMMRegister src, int8_t imm8);
+  void Pinsrd(XMMRegister dst, Register src, int8_t imm8) {
+    Pinsrd(dst, Operand(src), imm8);
+  }
+  void Pinsrd(XMMRegister dst, const Operand& src, int8_t imm8);
+
   // Emit call to the code we are currently generating.
   void CallSelf() {
     Handle<Code> self(reinterpret_cast<Code**>(CodeObject().location()));