X64: Add inline cache stub for storing to globals.

src/x64/stub-cache-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 453 matching lines @@
 
 Object* StoreStubCompiler::CompileStoreInterceptor(JSObject* a, String* b) {
   // TODO(X64): Implement a real stub.
   return Failure::InternalError();
 }
 
 
 Object* StoreStubCompiler::CompileStoreGlobal(GlobalObject* object,
                                               JSGlobalPropertyCell* cell,
                                               String* name) {
-  // TODO(X64): Implement a real stub.
-  return Failure::InternalError();
+  // ----------- S t a t e -------------
+  //  -- rax    : value
+  //  -- rcx    : name
+  //  -- rsp[0] : return address
+  //  -- rsp[8] : receiver
+  // -----------------------------------
+  Label miss;
+
+  // Check that the map of the global has not changed.
+  __ movq(rbx, Operand(rsp, kPointerSize));
+  __ Cmp(FieldOperand(rbx, HeapObject::kMapOffset),
+         Handle<Map>(object->map()));
+  __ j(not_equal, &miss);
+
+  // Store the value in the cell.
+  __ Move(rcx, Handle<JSGlobalPropertyCell>(cell));
+  __ movq(FieldOperand(rcx, JSGlobalPropertyCell::kValueOffset), rax);
+
+  __ IncrementCounter(&Counters::named_store_global_inline, 1);
+  // Return the value (register rax).
+  __ ret(0);
+
+  // Handle store cache miss.
+  __ bind(&miss);
+  __ IncrementCounter(&Counters::named_store_global_inline_miss, 1);
+  Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
+  __ Jump(ic, RelocInfo::CODE_TARGET);
+
+  // Return the generated code.
+  return GetCode(NORMAL, name);
 }
 
 
 Object* KeyedLoadStubCompiler::CompileLoadField(String* name,
                                                 JSObject* receiver,
                                                 JSObject* holder,
                                                 int index) {
   // ----------- S t a t e -------------
   //  -- rsp[0] : return address
   //  -- rsp[8] : name
@@ skipping 342 matching lines @@
 
   // Return the value (register rax).
   __ ret(0);
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal