[Interpreter] Add implementations for load immediate bytecodes.

src/interpreter/interpreter.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/interpreter/interpreter.h"
 
 #include "src/compiler.h"
 #include "src/compiler/interpreter-assembler.h"
 #include "src/factory.h"
 #include "src/interpreter/bytecode-generator.h"
@@ skipping 71 matching lines @@
     Handle<FixedArray> handler_table) {
   DCHECK(handler_table->length() == static_cast<int>(Bytecode::kLast) + 1);
   return handler_table->get(0) != isolate_->heap()->undefined_value();
 }
 
 
 // LdaZero
 //
 // Load literal '0' into the accumulator.
 void Interpreter::DoLdaZero(compiler::InterpreterAssembler* assembler) {
-  // TODO(rmcilroy) Implement.
+  Node* zero_value = __ NumberConstant(0.0);
+  __ SetAccumulator(zero_value);
   __ Dispatch();
 }
 
 
 // LdaSmi8 <imm8>
 //
 // Load an 8-bit integer literal into the accumulator as a Smi.
 void Interpreter::DoLdaSmi8(compiler::InterpreterAssembler* assembler) {
-  // TODO(rmcilroy) Implement 8-bit integer to SMI promotion.
+  Node* raw_int = __ BytecodeOperandImm8(0);
+  Node* smi_int = __ SmiTag(raw_int);
+  __ SetAccumulator(smi_int);
   __ Dispatch();
 }
 
 
 // LdaUndefined
 //
 // Load Undefined into the accumulator.
 void Interpreter::DoLdaUndefined(compiler::InterpreterAssembler* assembler) {
-  // TODO(rmcilroy) Implement.
+  Node* undefined_value = __ HeapConstant(Unique<HeapObject>::CreateImmovable(
+      isolate_->factory()->undefined_value()));
+  __ SetAccumulator(undefined_value);
   __ Dispatch();
 }
 
 
 // LdaNull
 //
 // Load Null into the accumulator.
 void Interpreter::DoLdaNull(compiler::InterpreterAssembler* assembler) {
-  // TODO(rmcilroy) Implement.
+  Node* null_value = __ HeapConstant(
+      Unique<HeapObject>::CreateImmovable(isolate_->factory()->null_value()));
+  __ SetAccumulator(null_value);
   __ Dispatch();
 }
 
 
 // LdaTheHole
 //
 // Load TheHole into the accumulator.
 void Interpreter::DoLdaTheHole(compiler::InterpreterAssembler* assembler) {
-  // TODO(rmcilroy) Implement.
+  Node* the_hole_value = __ HeapConstant(Unique<HeapObject>::CreateImmovable(
+      isolate_->factory()->the_hole_value()));
+  __ SetAccumulator(the_hole_value);
   __ Dispatch();
 }
 
 
 // LdaTrue
 //
 // Load True into the accumulator.
 void Interpreter::DoLdaTrue(compiler::InterpreterAssembler* assembler) {
-  // TODO(rmcilroy) Implement.
+  Node* true_value = __ HeapConstant(
+      Unique<HeapObject>::CreateImmovable(isolate_->factory()->true_value()));
+  __ SetAccumulator(true_value);
   __ Dispatch();
 }
 
 
 // LdaFalse
 //
 // Load False into the accumulator.
 void Interpreter::DoLdaFalse(compiler::InterpreterAssembler* assembler) {
-  // TODO(rmcilroy) Implement.
+  Node* false_value = __ HeapConstant(
+      Unique<HeapObject>::CreateImmovable(isolate_->factory()->false_value()));
+  __ SetAccumulator(false_value);
   __ Dispatch();
 }
 
 
 // Ldar <src>
 //
 // Load accumulator with value from register <src>.
 void Interpreter::DoLdar(compiler::InterpreterAssembler* assembler) {
-  // TODO(rmcilroy) Implement.
+  Node* value = __ LoadRegister(__ BytecodeOperandReg(0));
+  __ SetAccumulator(value);
   __ Dispatch();
 }
 
 
 // Star <dst>
 //
 // Store accumulator to register <dst>.
 void Interpreter::DoStar(compiler::InterpreterAssembler* assembler) {
-  // TODO(rmcilroy) Implement.
+  Node* reg_index = __ BytecodeOperandReg(0);
+  Node* accumulator = __ GetAccumulator();
+  __ StoreRegister(accumulator, reg_index);
   __ Dispatch();
 }
 
 
 // Add <src>
 //
 // Add register <src> to accumulator.
 void Interpreter::DoAdd(compiler::InterpreterAssembler* assembler) {
   // TODO(rmcilroy) Implement.
   __ Dispatch();
@@ skipping 31 matching lines @@
 //
 // Return the value in register 0.
 void Interpreter::DoReturn(compiler::InterpreterAssembler* assembler) {
   __ Return();
 }
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8