[Interpreter] Add support for short (16 bit) operands.

src/compiler/interpreter-assembler.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/compiler/interpreter-assembler.h"
 
 #include <ostream>
 
 #include "src/code-factory.h"
 #include "src/compiler/graph.h"
@@ skipping 108 matching lines @@
 
 
 Node* InterpreterAssembler::StoreRegister(Node* value, Node* reg_index) {
   return raw_assembler_->Store(kMachAnyTagged, RegisterFileRawPointer(),
                                RegisterFrameOffset(reg_index), value);
 }
 
 
 Node* InterpreterAssembler::BytecodeOperand(int operand_index) {
   DCHECK_LT(operand_index, interpreter::Bytecodes::NumberOfOperands(bytecode_));
+  DCHECK(interpreter::OperandSize::kByte ==
+         interpreter::Bytecodes::SizeOfOperand(
+             interpreter::Bytecodes::GetOperandType(bytecode_, operand_index)));
   return raw_assembler_->Load(
       kMachUint8, BytecodeArrayTaggedPointer(),
-      IntPtrAdd(BytecodeOffset(), Int32Constant(1 + operand_index)));
+      IntPtrAdd(BytecodeOffset(),
+                Int32Constant(interpreter::Bytecodes::GetOperandOffset(
+                    bytecode_, operand_index))));
 }
 
 
 Node* InterpreterAssembler::BytecodeOperandSignExtended(int operand_index) {
   DCHECK_LT(operand_index, interpreter::Bytecodes::NumberOfOperands(bytecode_));
+  DCHECK(interpreter::OperandSize::kByte ==
+         interpreter::Bytecodes::SizeOfOperand(
+             interpreter::Bytecodes::GetOperandType(bytecode_, operand_index)));
   Node* load = raw_assembler_->Load(
       kMachInt8, BytecodeArrayTaggedPointer(),
-      IntPtrAdd(BytecodeOffset(), Int32Constant(1 + operand_index)));
+      IntPtrAdd(BytecodeOffset(),
+                Int32Constant(interpreter::Bytecodes::GetOperandOffset(
+                    bytecode_, operand_index))));
   // Ensure that we sign extend to full pointer size
   if (kPointerSize == 8) {
     load = raw_assembler_->ChangeInt32ToInt64(load);
   }
   return load;
 }
 
 
+Node* InterpreterAssembler::BytecodeOperandWide(int operand_index) {
+  DCHECK_LT(operand_index, interpreter::Bytecodes::NumberOfOperands(bytecode_));
+  DCHECK(interpreter::OperandSize::kWide ==
+         interpreter::Bytecodes::SizeOfOperand(
+             interpreter::Bytecodes::GetOperandType(bytecode_, operand_index)));
+  return raw_assembler_->Load(
+      kMachUint16, BytecodeArrayTaggedPointer(),
+      IntPtrAdd(BytecodeOffset(),
+                Int32Constant(interpreter::Bytecodes::GetOperandOffset(
+                    bytecode_, operand_index))));
+}
+
+
 Node* InterpreterAssembler::BytecodeOperandCount(int operand_index) {
   DCHECK_EQ(interpreter::OperandType::kCount,
             interpreter::Bytecodes::GetOperandType(bytecode_, operand_index));
   return BytecodeOperand(operand_index);
 }
 
 
 Node* InterpreterAssembler::BytecodeOperandImm8(int operand_index) {
   DCHECK_EQ(interpreter::OperandType::kImm8,
             interpreter::Bytecodes::GetOperandType(bytecode_, operand_index));
   return BytecodeOperandSignExtended(operand_index);
 }
 
 
 Node* InterpreterAssembler::BytecodeOperandIdx(int operand_index) {
   DCHECK_EQ(interpreter::OperandType::kIdx,
             interpreter::Bytecodes::GetOperandType(bytecode_, operand_index));
   return BytecodeOperand(operand_index);
 }
 
 
 Node* InterpreterAssembler::BytecodeOperandReg(int operand_index) {
   DCHECK_EQ(interpreter::OperandType::kReg,
             interpreter::Bytecodes::GetOperandType(bytecode_, operand_index));
   return BytecodeOperandSignExtended(operand_index);
 }
 
 
+Node* InterpreterAssembler::BytecodeOperandWideIdx(int operand_index) {
+  DCHECK_EQ(interpreter::OperandType::kWideIdx,
+            interpreter::Bytecodes::GetOperandType(bytecode_, operand_index));
+  return BytecodeOperandWide(operand_index);
+}
+
+
 Node* InterpreterAssembler::Int32Constant(int value) {
   return raw_assembler_->Int32Constant(value);
 }
 
 
 Node* InterpreterAssembler::IntPtrConstant(intptr_t value) {
   return raw_assembler_->IntPtrConstant(value);
 }
 
 
@@ skipping 262 matching lines @@
   return raw_assembler_->schedule();
 }
 
 
 Zone* InterpreterAssembler::zone() { return raw_assembler_->zone(); }
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8