[x64] Use vmovapd and vmovsd when AVX is enabled.

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
diff --git a/src/x64/macro-assembler-x64.h b/src/x64/macro-assembler-x64.h
index a7fd91cdd2f23368f32e74931a12a2f44850dd1f..f2ecd237f2ca066d386c3139c80e09df2ad11b44 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-x64.h
@@ -894,6 +894,11 @@ class MacroAssembler: public Assembler {
   void Move(XMMRegister dst, float src) { Move(dst, bit_cast<uint32_t>(src)); }
   void Move(XMMRegister dst, double src) { Move(dst, bit_cast<uint64_t>(src)); }
 
+  void Movapd(XMMRegister dst, XMMRegister src);
+  void Movsd(XMMRegister dst, XMMRegister src);
+  void Movsd(XMMRegister dst, const Operand& src);
+  void Movsd(const Operand& dst, XMMRegister src);
+
   // Control Flow
   void Jump(Address destination, RelocInfo::Mode rmode);
   void Jump(ExternalReference ext);