Upgrade V8 to version 4.9.385.28
https://chromium.googlesource.com/v8/v8/+/4.9.385.28
FPIIM-449
Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/src/interpreter/bytecode-array-iterator.cc b/src/interpreter/bytecode-array-iterator.cc
new file mode 100644
index 0000000..d09d72f
--- /dev/null
+++ b/src/interpreter/bytecode-array-iterator.cc
@@ -0,0 +1,123 @@
+// 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/bytecode-array-iterator.h"
+
+#include "src/objects-inl.h"
+
+namespace v8 {
+namespace internal {
+namespace interpreter {
+
+BytecodeArrayIterator::BytecodeArrayIterator(
+ Handle<BytecodeArray> bytecode_array)
+ : bytecode_array_(bytecode_array), bytecode_offset_(0) {}
+
+
+void BytecodeArrayIterator::Advance() {
+ bytecode_offset_ += Bytecodes::Size(current_bytecode());
+}
+
+
+bool BytecodeArrayIterator::done() const {
+ return bytecode_offset_ >= bytecode_array()->length();
+}
+
+
+Bytecode BytecodeArrayIterator::current_bytecode() const {
+ DCHECK(!done());
+ uint8_t current_byte = bytecode_array()->get(bytecode_offset_);
+ return interpreter::Bytecodes::FromByte(current_byte);
+}
+
+
+int BytecodeArrayIterator::current_bytecode_size() const {
+ return Bytecodes::Size(current_bytecode());
+}
+
+
+uint32_t BytecodeArrayIterator::GetRawOperand(int operand_index,
+ OperandType operand_type) const {
+ DCHECK_GE(operand_index, 0);
+ DCHECK_LT(operand_index, Bytecodes::NumberOfOperands(current_bytecode()));
+ DCHECK_EQ(operand_type,
+ Bytecodes::GetOperandType(current_bytecode(), operand_index));
+ uint8_t* operand_start =
+ bytecode_array()->GetFirstBytecodeAddress() + bytecode_offset_ +
+ Bytecodes::GetOperandOffset(current_bytecode(), operand_index);
+ switch (Bytecodes::SizeOfOperand(operand_type)) {
+ default:
+ case OperandSize::kNone:
+ UNREACHABLE();
+ case OperandSize::kByte:
+ return static_cast<uint32_t>(*operand_start);
+ case OperandSize::kShort:
+ return ReadUnalignedUInt16(operand_start);
+ }
+}
+
+
+int8_t BytecodeArrayIterator::GetImmediateOperand(int operand_index) const {
+ uint32_t operand = GetRawOperand(operand_index, OperandType::kImm8);
+ return static_cast<int8_t>(operand);
+}
+
+
+int BytecodeArrayIterator::GetCountOperand(int operand_index) const {
+ OperandSize size =
+ Bytecodes::GetOperandSize(current_bytecode(), operand_index);
+ OperandType type = (size == OperandSize::kByte) ? OperandType::kCount8
+ : OperandType::kCount16;
+ uint32_t operand = GetRawOperand(operand_index, type);
+ return static_cast<int>(operand);
+}
+
+
+int BytecodeArrayIterator::GetIndexOperand(int operand_index) const {
+ OperandType operand_type =
+ Bytecodes::GetOperandType(current_bytecode(), operand_index);
+ DCHECK(operand_type == OperandType::kIdx8 ||
+ operand_type == OperandType::kIdx16);
+ uint32_t operand = GetRawOperand(operand_index, operand_type);
+ return static_cast<int>(operand);
+}
+
+
+Register BytecodeArrayIterator::GetRegisterOperand(int operand_index) const {
+ OperandType operand_type =
+ Bytecodes::GetOperandType(current_bytecode(), operand_index);
+ DCHECK(operand_type == OperandType::kReg8 ||
+ operand_type == OperandType::kRegPair8 ||
+ operand_type == OperandType::kMaybeReg8 ||
+ operand_type == OperandType::kReg16);
+ uint32_t operand = GetRawOperand(operand_index, operand_type);
+ return Register::FromOperand(operand);
+}
+
+
+Handle<Object> BytecodeArrayIterator::GetConstantForIndexOperand(
+ int operand_index) const {
+ Handle<FixedArray> constants = handle(bytecode_array()->constant_pool());
+ return FixedArray::get(constants, GetIndexOperand(operand_index));
+}
+
+
+int BytecodeArrayIterator::GetJumpTargetOffset() const {
+ Bytecode bytecode = current_bytecode();
+ if (interpreter::Bytecodes::IsJumpImmediate(bytecode)) {
+ int relative_offset = GetImmediateOperand(0);
+ return current_offset() + relative_offset;
+ } else if (interpreter::Bytecodes::IsJumpConstant(bytecode) ||
+ interpreter::Bytecodes::IsJumpConstantWide(bytecode)) {
+ Smi* smi = Smi::cast(*GetConstantForIndexOperand(0));
+ return current_offset() + smi->value();
+ } else {
+ UNREACHABLE();
+ return kMinInt;
+ }
+}
+
+} // namespace interpreter
+} // namespace internal
+} // namespace v8