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67 lines
2.2 KiB
67 lines
2.2 KiB
// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_INTERPRETER_BYTECODE_ARRAY_ITERATOR_H_
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#define V8_INTERPRETER_BYTECODE_ARRAY_ITERATOR_H_
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#include "src/handles.h"
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#include "src/interpreter/bytecode-register.h"
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#include "src/interpreter/bytecodes.h"
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#include "src/objects.h"
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#include "src/runtime/runtime.h"
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namespace v8 {
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namespace internal {
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namespace interpreter {
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class BytecodeArrayIterator {
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public:
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explicit BytecodeArrayIterator(Handle<BytecodeArray> bytecode_array);
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void Advance();
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bool done() const;
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Bytecode current_bytecode() const;
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int current_bytecode_size() const;
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int current_offset() const { return bytecode_offset_; }
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OperandScale current_operand_scale() const { return operand_scale_; }
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int current_prefix_offset() const { return prefix_offset_; }
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const Handle<BytecodeArray>& bytecode_array() const {
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return bytecode_array_;
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}
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uint32_t GetFlagOperand(int operand_index) const;
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int32_t GetImmediateOperand(int operand_index) const;
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uint32_t GetIndexOperand(int operand_index) const;
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uint32_t GetRegisterCountOperand(int operand_index) const;
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Register GetRegisterOperand(int operand_index) const;
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int GetRegisterOperandRange(int operand_index) const;
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Runtime::FunctionId GetRuntimeIdOperand(int operand_index) const;
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Runtime::FunctionId GetIntrinsicIdOperand(int operand_index) const;
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Handle<Object> GetConstantForIndexOperand(int operand_index) const;
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// Returns the absolute offset of the branch target at the current
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// bytecode. It is an error to call this method if the bytecode is
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// not for a jump or conditional jump.
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int GetJumpTargetOffset() const;
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private:
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uint32_t GetUnsignedOperand(int operand_index,
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OperandType operand_type) const;
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int32_t GetSignedOperand(int operand_index, OperandType operand_type) const;
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void UpdateOperandScale();
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Handle<BytecodeArray> bytecode_array_;
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int bytecode_offset_;
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OperandScale operand_scale_;
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int prefix_offset_;
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DISALLOW_COPY_AND_ASSIGN(BytecodeArrayIterator);
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};
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} // namespace interpreter
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} // namespace internal
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} // namespace v8
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#endif // V8_INTERPRETER_BYTECODE_GRAPH_ITERATOR_H_
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