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

src/x64/assembler-x64.h

Index: src/x64/assembler-x64.h
diff --git a/src/x64/assembler-x64.h b/src/x64/assembler-x64.h
index 96715d139484735459b04291f66fd001f38c7c6a..9c52b772686316c20e132cf5eede5057d4061bc8 100644
--- a/src/x64/assembler-x64.h
+++ b/src/x64/assembler-x64.h
@@ -1064,6 +1064,7 @@ class Assembler : public AssemblerBase {
 
   // SSE2 instructions
   void movd(XMMRegister dst, Register src);
+  void movd(XMMRegister dst, const Operand& src);
   void movd(Register dst, XMMRegister src);
   void movq(XMMRegister dst, Register src);
   void movq(Register dst, XMMRegister src);
@@ -1132,9 +1133,17 @@ class Assembler : public AssemblerBase {
 
   void movmskpd(Register dst, XMMRegister src);
 
+  void punpckldq(XMMRegister dst, XMMRegister src);
+  void punpckhdq(XMMRegister dst, XMMRegister src);
+
   // SSE 4.1 instruction
   void extractps(Register dst, XMMRegister src, byte imm8);
 
+  void pextrd(Register dst, XMMRegister src, int8_t imm8);
+
+  void pinsrd(XMMRegister dst, Register src, int8_t imm8);
+  void pinsrd(XMMRegister dst, const Operand& src, int8_t imm8);
+
   enum RoundingMode {
     kRoundToNearest = 0x0,
     kRoundDown      = 0x1,