Add x64 implementation test support for assembler and code generator.

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 41 matching lines @@
 
 void MacroAssembler::Check(Condition cc, const char* msg) {
   Label L;
   j(cc, &L);
   Abort(msg);
   // will not return here
   bind(&L);
 }
 
 
+void MacroAssembler::ConstructAndTestJSFunction() {
+  const int initial_buffer_size = 4 * KB;
+  char* buffer = new char[initial_buffer_size];
+  MacroAssembler masm(buffer, initial_buffer_size);
+#define __ ACCESS_MASM((&masm))
+  // Construct a simple JSfunction here, using Assembler and MacroAssembler
+  // commands.
+  __ int3();
+#undef __
+  CodeDesc desc;
+  masm.GetCode(&desc);
+  // TODO(X64): Create the function object and call it.
+}
+
+
 void MacroAssembler::Abort(const char* msg) {
   // We want to pass the msg string like a smi to avoid GC
   // problems, however msg is not guaranteed to be aligned
   // properly. Instead, we pass an aligned pointer that is
   // a proper v8 smi, but also pass the alignment difference
   // from the real pointer as a smi.
   intptr_t p1 = reinterpret_cast<intptr_t>(msg);
   intptr_t p0 = (p1 & ~kSmiTagMask) + kSmiTag;
   // Note: p0 might not be a valid Smi *value*, but it has a valid Smi tag.
   ASSERT(reinterpret_cast<Object*>(p0)->IsSmi());
@@ skipping 369 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