10b57cec5SDimitry Andric //===- llvm/MC/MCCodeEmitter.h - Instruction Encoding -----------*- C++ -*-===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric 90b57cec5SDimitry Andric #ifndef LLVM_MC_MCCODEEMITTER_H 100b57cec5SDimitry Andric #define LLVM_MC_MCCODEEMITTER_H 110b57cec5SDimitry Andric 120b57cec5SDimitry Andric namespace llvm { 130b57cec5SDimitry Andric 140b57cec5SDimitry Andric class MCFixup; 150b57cec5SDimitry Andric class MCInst; 160b57cec5SDimitry Andric class MCSubtargetInfo; 170b57cec5SDimitry Andric class raw_ostream; 180b57cec5SDimitry Andric template<typename T> class SmallVectorImpl; 190b57cec5SDimitry Andric 200b57cec5SDimitry Andric /// MCCodeEmitter - Generic instruction encoding interface. 210b57cec5SDimitry Andric class MCCodeEmitter { 220b57cec5SDimitry Andric protected: // Can only create subclasses. 230b57cec5SDimitry Andric MCCodeEmitter(); 240b57cec5SDimitry Andric 250b57cec5SDimitry Andric public: 260b57cec5SDimitry Andric MCCodeEmitter(const MCCodeEmitter &) = delete; 270b57cec5SDimitry Andric MCCodeEmitter &operator=(const MCCodeEmitter &) = delete; 280b57cec5SDimitry Andric virtual ~MCCodeEmitter(); 290b57cec5SDimitry Andric 300b57cec5SDimitry Andric /// Lifetime management reset()310b57cec5SDimitry Andric virtual void reset() {} 320b57cec5SDimitry Andric 3306c3fb27SDimitry Andric /// Append the prefixes of given instruction to the code buffer. 34480093f4SDimitry Andric /// 35480093f4SDimitry Andric /// \param Inst a single low-level machine instruction. 3606c3fb27SDimitry Andric /// \param CB code buffer emitPrefix(const MCInst & Inst,SmallVectorImpl<char> & CB,const MCSubtargetInfo & STI)3706c3fb27SDimitry Andric virtual void emitPrefix(const MCInst &Inst, SmallVectorImpl<char> &CB, 38480093f4SDimitry Andric const MCSubtargetInfo &STI) const {} 395f757f3fSDimitry Andric /// Encode the given \p Inst to bytes and append to \p CB. 4006c3fb27SDimitry Andric virtual void encodeInstruction(const MCInst &Inst, SmallVectorImpl<char> &CB, 410b57cec5SDimitry Andric SmallVectorImpl<MCFixup> &Fixups, 425f757f3fSDimitry Andric const MCSubtargetInfo &STI) const = 0; 430b57cec5SDimitry Andric }; 440b57cec5SDimitry Andric 450b57cec5SDimitry Andric } // end namespace llvm 460b57cec5SDimitry Andric 470b57cec5SDimitry Andric #endif // LLVM_MC_MCCODEEMITTER_H 48