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//===- HexagonMCCodeEmitter.h - Hexagon Target Descriptions -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// Definition for classes that emit Hexagon machine code from MCInsts
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_HEXAGON_MCTARGETDESC_HEXAGONMCCODEEMITTER_H
#define LLVM_LIB_TARGET_HEXAGON_MCTARGETDESC_HEXAGONMCCODEEMITTER_H
#include "MCTargetDesc/HexagonFixupKinds.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/SubtargetFeature.h"
#include <cstddef>
#include <cstdint>
#include <memory>
namespace llvm {
class MCContext;
class MCInst;
class MCInstrInfo;
class MCOperand;
class MCSubtargetInfo;
class raw_ostream;
class HexagonMCCodeEmitter : public MCCodeEmitter {
MCContext &MCT;
MCInstrInfo const &MCII;
// A mutable state of the emitter when encoding bundles and duplexes.
struct EmitterState {
unsigned Addend = 0;
bool Extended = false;
bool SubInst1 = false;
const MCInst *Bundle = nullptr;
size_t Index = 0;
};
mutable EmitterState State;
public:
HexagonMCCodeEmitter(MCInstrInfo const &MII, MCContext &MCT)
: MCT(MCT), MCII(MII) {}
void encodeInstruction(MCInst const &MI, raw_ostream &OS,
SmallVectorImpl<MCFixup> &Fixups,
MCSubtargetInfo const &STI) const override;
void EncodeSingleInstruction(const MCInst &MI, raw_ostream &OS,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI,
uint32_t Parse) const;
// TableGen'erated function for getting the
// binary encoding for an instruction.
uint64_t getBinaryCodeForInstr(MCInst const &MI,
SmallVectorImpl<MCFixup> &Fixups,
MCSubtargetInfo const &STI) const;
/// Return binary encoding of operand.
unsigned getMachineOpValue(MCInst const &MI, MCOperand const &MO,
SmallVectorImpl<MCFixup> &Fixups,
MCSubtargetInfo const &STI) const;
private:
// helper routine for getMachineOpValue()
unsigned getExprOpValue(const MCInst &MI, const MCOperand &MO,
const MCExpr *ME, SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
Hexagon::Fixups getFixupNoBits(MCInstrInfo const &MCII, const MCInst &MI,
const MCOperand &MO,
const MCSymbolRefExpr::VariantKind Kind) const;
// Return parse bits for instruction `MCI' inside bundle `MCB'
uint32_t parseBits(size_t Last, MCInst const &MCB, MCInst const &MCI) const;
uint64_t computeAvailableFeatures(const FeatureBitset &FB) const;
void verifyInstructionPredicates(const MCInst &MI,
uint64_t AvailableFeatures) const;
};
} // end namespace llvm
#endif // LLVM_LIB_TARGET_HEXAGON_MCTARGETDESC_HEXAGONMCCODEEMITTER_H
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