[Arguments] Port fast arguments creation stubs to X64 and ARM.

src/ia32/code-stubs-ia32.cc

 // Copyright 2011 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 2917 matching lines @@
   __ cmp(Operand(ecx), Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ j(not_equal, &runtime, Label::kNear);
 
   // Patch the arguments.length and the parameters pointer.
   __ mov(ecx, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset));
   __ mov(Operand(esp, 1 * kPointerSize), ecx);
   __ lea(edx, Operand(edx, ecx, times_2,
               StandardFrameConstants::kCallerSPOffset));
   __ mov(Operand(esp, 2 * kPointerSize), edx);
 
-  // Try the new space allocation. Start out with computing the size of
-  // the arguments object and the elements array.
   __ bind(&runtime);
   __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1);
 }
 
 
 void ArgumentsAccessStub::GenerateNewNonStrictFast(MacroAssembler* masm) {
   // esp[0] : return address
   // esp[4] : number of parameters (tagged)
   // esp[8] : receiver displacement
   // esp[12] : function
@@ skipping 182 matching lines @@
   __ mov(FieldOperand(edi, FixedArray::kMapOffset),
          Immediate(FACTORY->fixed_array_map()));
   __ mov(FieldOperand(edi, FixedArray::kLengthOffset), ecx);
 
   Label arguments_loop, arguments_test;
   __ mov(ebx, Operand(esp, 1 * kPointerSize));
   __ mov(edx, Operand(esp, 4 * kPointerSize));
   __ sub(Operand(edx), ebx);  // Is there a smarter way to do negative scaling?
   __ sub(Operand(edx), ebx);
   __ jmp(&arguments_test, Label::kNear);
+
   __ bind(&arguments_loop);
   __ sub(Operand(edx), Immediate(kPointerSize));
   __ mov(eax, Operand(edx, 0));
   __ mov(FieldOperand(edi, ebx, times_2, FixedArray::kHeaderSize), eax);
   __ add(Operand(ebx), Immediate(Smi::FromInt(1)));
+
   __ bind(&arguments_test);
   __ cmp(ebx, Operand(ecx));
   __ j(less, &arguments_loop, Label::kNear);
 
   // Restore.
   __ pop(eax);  // Address of arguments object.
   __ pop(ebx);  // Parameter count.
 
   // Return and remove the on-stack parameters.
   __ ret(3 * kPointerSize);
@@ skipping 3272 matching lines @@
   __ Drop(1);
   __ ret(2 * kPointerSize);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32