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PPCMCCodeEmitter.h
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PPCMCCodeEmitter.h
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//===-- PPCMCCodeEmitter.h - Convert PPC code to machine code -------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file implements the PPCMCCodeEmitter class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_PPC_MCCODEEMITTER_PPCCODEEMITTER_H
#define LLVM_LIB_TARGET_PPC_MCCODEEMITTER_PPCCODEEMITTER_H
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCInst.h"
namespace llvm {
class PPCMCCodeEmitter : public MCCodeEmitter {
const MCInstrInfo &MCII;
const MCContext &CTX;
bool IsLittleEndian;
public:
PPCMCCodeEmitter(const MCInstrInfo &mcii, MCContext &ctx)
: MCII(mcii), CTX(ctx),
IsLittleEndian(ctx.getAsmInfo()->isLittleEndian()) {}
PPCMCCodeEmitter(const PPCMCCodeEmitter &) = delete;
void operator=(const PPCMCCodeEmitter &) = delete;
~PPCMCCodeEmitter() override = default;
unsigned getDirectBrEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned getCondBrEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned getAbsDirectBrEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned getAbsCondBrEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned getImm16Encoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned long getImm34Encoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned getMemRIEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned getMemRIXEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned getMemRIX16Encoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
uint64_t getMemRI34PCRelEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
uint64_t getMemRI34Encoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned getSPE8DisEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned getSPE4DisEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned getSPE2DisEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned getTLSRegEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned getTLSCallEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned get_crbitm_encoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
/// getMachineOpValue - Return binary encoding of operand. If the machine
/// operand requires relocation, record the relocation and return zero.
uint64_t getMachineOpValue(const MCInst &MI, const MCOperand &MO,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
// getBinaryCodeForInstr - TableGen'erated function for getting the
// binary encoding for an instruction.
uint64_t getBinaryCodeForInstr(const MCInst &MI,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
void encodeInstruction(const MCInst &MI, raw_ostream &OS,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const override;
// Get the number of bytes used to encode the given MCInst.
unsigned getInstSizeInBytes(const MCInst &MI) const;
// Is this instruction a prefixed instruction.
bool isPrefixedInstruction(const MCInst &MI) const;
private:
FeatureBitset computeAvailableFeatures(const FeatureBitset &FB) const;
void
verifyInstructionPredicates(const MCInst &MI,
const FeatureBitset &AvailableFeatures) const;
};
} // namespace llvm
#endif // LLVM_LIB_TARGET_PPC_MCCODEEMITTER_PPCCODEEMITTER_H