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49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
//===- llvm/MC/MCCodeEmitter.h - Instruction Encoding -----------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCCODEEMITTER_H
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#define LLVM_MC_MCCODEEMITTER_H
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namespace llvm {
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class MCFixup;
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class MCInst;
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class MCSubtargetInfo;
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class raw_ostream;
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template<typename T> class SmallVectorImpl;
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/// MCCodeEmitter - Generic instruction encoding interface.
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class MCCodeEmitter {
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protected: // Can only create subclasses.
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MCCodeEmitter();
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public:
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MCCodeEmitter(const MCCodeEmitter &) = delete;
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MCCodeEmitter &operator=(const MCCodeEmitter &) = delete;
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virtual ~MCCodeEmitter();
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/// Lifetime management
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virtual void reset() {}
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/// Emit the prefixes of given instruction on the output stream.
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///
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/// \param Inst a single low-level machine instruction.
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/// \param OS output stream.
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virtual void emitPrefix(const MCInst &Inst, raw_ostream &OS,
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const MCSubtargetInfo &STI) const {}
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/// EncodeInstruction - Encode the given \p Inst to bytes on the output
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/// stream \p OS.
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virtual void encodeInstruction(const MCInst &Inst, raw_ostream &OS,
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SmallVectorImpl<MCFixup> &Fixups,
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const MCSubtargetInfo &STI) const = 0;
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};
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} // end namespace llvm
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#endif // LLVM_MC_MCCODEEMITTER_H
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