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//===- llvm/MC/MCCodeEmitter.h - Instruction Encoding -----------*- C++ -*-===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_MC_MCCODEEMITTER_H

#define LLVM_MC_MCCODEEMITTER_H

namespace llvm {

class MCFixup;

class MCInst;

class MCSubtargetInfo;

class raw_ostream;

template<typename T> class SmallVectorImpl;

/// MCCodeEmitter - Generic instruction encoding interface.

class MCCodeEmitter {

protected: // Can only create subclasses.

  MCCodeEmitter();

public:

  MCCodeEmitter(const MCCodeEmitter &) = delete;

  MCCodeEmitter &operator=(const MCCodeEmitter &) = delete;

  virtual ~MCCodeEmitter();

  /// Lifetime management

  virtual void reset() {}

  /// Emit the prefixes of given instruction on the output stream.

  ///

  /// \param Inst a single low-level machine instruction.

  /// \param OS output stream.

  virtual void emitPrefix(const MCInst &Inst, raw_ostream &OS,

                          const MCSubtargetInfo &STI) const {}

  /// EncodeInstruction - Encode the given \p Inst to bytes on the output

  /// stream \p OS.

  virtual void encodeInstruction(const MCInst &Inst, raw_ostream &OS,

                                 SmallVectorImpl<MCFixup> &Fixups,

                                 const MCSubtargetInfo &STI) const = 0;

};

} // end namespace llvm

#endif // LLVM_MC_MCCODEEMITTER_H