bytecode-decoder.h

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// 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.
 
#ifndef V8_INTERPRETER_BYTECODE_DECODER_H_
#define V8_INTERPRETER_BYTECODE_DECODER_H_
 
#include <iosfwd>
 
#include "src/interpreter/bytecode-register.h"
 
namespace v8 {
namespace internal {
namespace interpreter {
 
class V8_EXPORT_PRIVATE BytecodeDecoder final {
 public:
  // Decodes a register operand in a byte array.
  static Register DecodeRegisterOperand(Address operand_start,
                                        OperandType operand_type,
                                        OperandScale operand_scale);
 
  // Decodes a register list operand in a byte array.
  static RegisterList DecodeRegisterListOperand(Address operand_start,
                                                uint32_t count,
                                                OperandType operand_type,
                                                OperandScale operand_scale);
 
  // Decodes a signed operand in a byte array.
  static int32_t DecodeSignedOperand(Address operand_start,
                                     OperandType operand_type,
                                     OperandScale operand_scale);
 
  // Decodes an unsigned operand in a byte array.
  static uint32_t DecodeUnsignedOperand(Address operand_start,
                                        OperandType operand_type,
                                        OperandScale operand_scale);
 
  // Decode a single bytecode and operands to |os|.
  static std::ostream& Decode(std::ostream& os, const uint8_t* bytecode_start,
                              bool with_hex = true);
};
 
}  // namespace interpreter
}  // namespace internal
}  // namespace v8
 
#endif  // V8_INTERPRETER_BYTECODE_DECODER_H_