Add allocation support to x64 macro assembler

src/x64/codegen-x64.cc

 // Copyright 2009 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 7124 matching lines @@
 
   // Do tail-call to runtime routine.
   __ TailCallRuntime(ExternalReference(Runtime::kStackGuard), 1);
 }
 
 
 void FloatingPointHelper::AllocateHeapNumber(MacroAssembler* masm,
                                              Label* need_gc,
                                              Register scratch,
                                              Register result) {
-  ExternalReference allocation_top =
-      ExternalReference::new_space_allocation_top_address();
-  ExternalReference allocation_limit =
-      ExternalReference::new_space_allocation_limit_address();
-  __ movq(scratch, allocation_top);  // scratch: address of allocation top.
-  __ movq(result, Operand(scratch, 0));
-  __ addq(result, Immediate(HeapNumber::kSize));  // New top.
-  __ movq(kScratchRegister, allocation_limit);
-  __ cmpq(result, Operand(kScratchRegister, 0));
-  __ j(above, need_gc);
+  // Allocate heap number in new space.
+  __ AllocateObjectInNewSpace(HeapNumber::kSize,
+                              result,
+                              scratch,
+                              no_reg,
+                              need_gc,
+                              false);
 
-  __ movq(Operand(scratch, 0), result);  // store new top
-  __ addq(result, Immediate(kHeapObjectTag - HeapNumber::kSize));
+  // Set the map and tag the result.
+  __ addq(result, Immediate(kHeapObjectTag));
   __ movq(kScratchRegister,
           Factory::heap_number_map(),
           RelocInfo::EMBEDDED_OBJECT);
   __ movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister);
-  // Tag old top and use as result.
 }
 
 
 void FloatingPointHelper::LoadFloatOperand(MacroAssembler* masm,
                                            Register number) {
   Label load_smi, done;
 
   __ testl(number, Immediate(kSmiTagMask));
   __ j(zero, &load_smi);
   __ fld_d(FieldOperand(number, HeapNumber::kValueOffset));
@@ skipping 528 matching lines @@
 int CompareStub::MinorKey() {
   // Encode the two parameters in a unique 16 bit value.
   ASSERT(static_cast<unsigned>(cc_) < (1 << 15));
   return (static_cast<unsigned>(cc_) << 1) | (strict_ ? 1 : 0);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal