Introduce MoveDouble to the X64 MacroAssembler

src/x64/lithium-codegen-x64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3317 matching lines @@
 
   // Slow case: Call the runtime system to do the number allocation.
   __ bind(&slow);
   CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
   // Set the pointer to the new heap number in tmp.
   if (!tmp.is(rax)) __ movq(tmp, rax);
   // Restore input_reg after call to runtime.
   __ LoadFromSafepointRegisterSlot(input_reg, input_reg);
 
   __ bind(&allocated);
-  __ movq(tmp2, FieldOperand(input_reg, HeapNumber::kValueOffset));
+  __ MoveDouble(tmp2, FieldOperand(input_reg, HeapNumber::kValueOffset));
   __ shl(tmp2, Immediate(1));
   __ shr(tmp2, Immediate(1));
-  __ movq(FieldOperand(tmp, HeapNumber::kValueOffset), tmp2);
+  __ MoveDouble(FieldOperand(tmp, HeapNumber::kValueOffset), tmp2);
   __ StoreToSafepointRegisterSlot(input_reg, tmp);
 
   __ bind(&done);
 }
 
 
 void LCodeGen::EmitIntegerMathAbs(LMathAbs* instr) {
   Register input_reg = ToRegister(instr->value());
   __ testl(input_reg, input_reg);
   Label is_positive;
@@ skipping 2106 matching lines @@
                                FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64