X64 platform: Add more register allocator functions.

src/x64/macro-assembler-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 513 matching lines @@
   bind(&done);
 }
 
 
 void MacroAssembler::InvokeFunction(Register function,
                                     const ParameterCount& actual,
                                     InvokeFlag flag) {
   ASSERT(function.is(rdi));
   movq(rdx, FieldOperand(function, JSFunction::kSharedFunctionInfoOffset));
   movq(rsi, FieldOperand(function, JSFunction::kContextOffset));
-  movq(rbx, FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset));
+  movl(rbx, FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset));
   movq(rdx, FieldOperand(rdx, SharedFunctionInfo::kCodeOffset));
+  // Advances rdx to the end of the Code object headers, to the start of

[Kevin Millikin (Chromium), 2009/06/16 08:27:03]

headers ==> header

+  // the executable code.
   lea(rdx, FieldOperand(rdx, Code::kHeaderSize));
 
   ParameterCount expected(rbx);
   InvokeCode(rdx, expected, actual, flag);
 }
 
 
 void MacroAssembler::EnterFrame(StackFrame::Type type) {
   push(rbp);
   movq(rbp, rsp);
@@ skipping 118 matching lines @@
   push(rcx);
 
   // Clear the top frame.
   ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address);
   movq(kScratchRegister, c_entry_fp_address);
   movq(Operand(kScratchRegister, 0), Immediate(0));
 }
 
 
 } }  // namespace v8::internal