[Interpreter] Add implementations of arithmetic binary op bytecodes.

src/compiler/interpreter-assembler.cc

Index: src/compiler/interpreter-assembler.cc
diff --git a/src/compiler/interpreter-assembler.cc b/src/compiler/interpreter-assembler.cc
index f981a4f6751442c2573887b82cf098c05f05939e..edd292b70310ef4d9d1253e6df41c86b70532eee 100644
--- a/src/compiler/interpreter-assembler.cc
+++ b/src/compiler/interpreter-assembler.cc
@@ -187,12 +187,45 @@ Node* InterpreterAssembler::SmiUntag(Node* value) {
 }
 
 
+Node* InterpreterAssembler::LoadObjectField(Node* object, int offset) {
+  return raw_assembler_->Load(kMachAnyTagged, object,
+                              IntPtrConstant(offset - kHeapObjectTag));
+}
+
+
 Node* InterpreterAssembler::LoadContextSlot(int slot_index) {
   return raw_assembler_->Load(kMachAnyTagged, ContextTaggedPointer(),
                               IntPtrConstant(Context::SlotOffset(slot_index)));
 }
 
 
+Node* InterpreterAssembler::CallJSBuiltin(Builtins::JavaScript builtin,
+                                          Node* receiver, Node** args,
+                                          int arg_count) {
+  Node* global_object = LoadContextSlot(Context::GLOBAL_OBJECT_INDEX);
+  Node* builtins_object =
+      LoadObjectField(global_object, GlobalObject::kBuiltinsOffset);
+  Node* function = LoadObjectField(
+      builtins_object, JSBuiltinsObject::OffsetOfFunctionWithId(builtin));
+  return raw_assembler_->CallJS(function, receiver, ContextTaggedPointer(),
+                                args, arg_count);
+}
+
+
+Node* InterpreterAssembler::CallJSBuiltin(Builtins::JavaScript builtin,
+                                          Node* receiver) {
+  return CallJSBuiltin(builtin, receiver, nullptr, 0);
+}
+
+
+Node* InterpreterAssembler::CallJSBuiltin(Builtins::JavaScript builtin,
+                                          Node* receiver, Node* arg1) {
+  Node** args = zone()->NewArray<Node*>(1);
+  args[0] = arg1;
+  return CallJSBuiltin(builtin, receiver, args, 1);

[Michael Starzinger, 2015/08/19 17:18:56]

nit: Shouldn't the following do the trick ...

return CallJSBuiltin(builtin, receiver, &arg1, 1);

[rmcilroy, 2015/08/24 11:49:07]

Yup :). Done.

+}
+
+
 void InterpreterAssembler::Return() {
   Node* exit_trampoline_code_object =
       HeapConstant(Unique<HeapObject>::CreateImmovable(
@@ -278,6 +311,8 @@ Schedule* InterpreterAssembler::schedule() {
 }
 
 
+Zone* InterpreterAssembler::zone() { return raw_assembler_->zone(); }
+
 
 }  // namespace interpreter
 }  // namespace internal