Introduce MoveDouble to the X64 MacroAssembler

R=danno@chromium.org

Review URL: https://codereview.chromium.org/26216008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17383 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/x64/code-stubs-x64.cc

@@ -594,7 +594,7 @@ void TranscendentalCacheStub::Generate(MacroAssembler* masm) {
     // Input is a HeapNumber. Push it on the FPU stack and load its
     // bits into rbx.
     __ fld_d(FieldOperand(rax, HeapNumber::kValueOffset));
-    __ movq(rbx, FieldOperand(rax, HeapNumber::kValueOffset));
+    __ MoveDouble(rbx, FieldOperand(rax, HeapNumber::kValueOffset));
     __ movq(rdx, rbx);
 
     __ bind(&loaded);

src/x64/codegen-x64.cc

@@ -466,7 +466,7 @@ void ElementsTransitionGenerator::GenerateDoubleToObject(
   // Non-hole double, copy value into a heap number.
   __ AllocateHeapNumber(rax, r15, &gc_required);
   // rax: new heap number
-  __ movq(FieldOperand(rax, HeapNumber::kValueOffset), r14);
+  __ MoveDouble(FieldOperand(rax, HeapNumber::kValueOffset), r14);
   __ movq(FieldOperand(r11,
                        r9,
                        times_pointer_size,

src/x64/lithium-codegen-x64.cc

@@ -3315,10 +3315,10 @@ void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr) {
   __ 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);

src/x64/macro-assembler-x64.h

@@ -829,6 +829,8 @@ class MacroAssembler: public Assembler {
   void Pop(Register dst) { pop(dst); }
   void PushReturnAddressFrom(Register src) { push(src); }
   void PopReturnAddressTo(Register dst) { pop(dst); }
+  void MoveDouble(Register dst, const Operand& src) { movq(dst, src); }
+  void MoveDouble(const Operand& dst, Register src) { movq(dst, src); }
 
   // Control Flow
   void Jump(Address destination, RelocInfo::Mode rmode);

src/x64/stub-cache-x64.cc

@@ -2440,7 +2440,7 @@ Handle<Code> CallStubCompiler::CompileMathAbsCall(
   // Check if the argument is a heap number and load its value.
   __ bind(&not_smi);
   __ CheckMap(rax, factory()->heap_number_map(), &slow, DONT_DO_SMI_CHECK);
-  __ movq(rbx, FieldOperand(rax, HeapNumber::kValueOffset));
+  __ MoveDouble(rbx, FieldOperand(rax, HeapNumber::kValueOffset));
 
   // Check the sign of the argument. If the argument is positive,
   // just return it.
@@ -2458,7 +2458,7 @@ Handle<Code> CallStubCompiler::CompileMathAbsCall(
   __ bind(&negative_sign);
   __ xor_(rbx, rdi);
   __ AllocateHeapNumber(rax, rdx, &slow);
-  __ movq(FieldOperand(rax, HeapNumber::kValueOffset), rbx);
+  __ MoveDouble(FieldOperand(rax, HeapNumber::kValueOffset), rbx);
   __ ret(2 * kPointerSize);
 
   // Tail call the full function. We do not have to patch the receiver