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//===-- CSKYMCCodeEmitter.cpp - CSKY Code Emitter interface ---------------===//
//
// 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 CSKYMCCodeEmitter class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_CSKY_MCTARGETDESC_CSKYMCCODEEMITTER_H
#define LLVM_LIB_TARGET_CSKY_MCTARGETDESC_CSKYMCCODEEMITTER_H
#include "CSKYMCExpr.h"
#include "MCTargetDesc/CSKYFixupKinds.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
namespace llvm {
class CSKYMCCodeEmitter : public MCCodeEmitter {
MCContext &Ctx;
const MCInstrInfo &MII;
public:
CSKYMCCodeEmitter(MCContext &Ctx, const MCInstrInfo &MII)
: Ctx(Ctx), MII(MII) {}
~CSKYMCCodeEmitter() {}
void encodeInstruction(const MCInst &Inst, raw_ostream &OS,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const override;
// Generated by tablegen.
uint64_t getBinaryCodeForInstr(const MCInst &MI,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
// Default encoding method used by tablegen.
unsigned getMachineOpValue(const MCInst &MI, const MCOperand &MO,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
template <int shift = 0>
unsigned getImmOpValue(const MCInst &MI, unsigned Idx,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const {
const MCOperand &MO = MI.getOperand(Idx);
assert(MO.isImm() && "Unexpected MO type.");
return (MO.getImm() >> shift);
}
unsigned getOImmOpValue(const MCInst &MI, unsigned Idx,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
unsigned getImmShiftOpValue(const MCInst &MI, unsigned Idx,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const {
const MCOperand &MO = MI.getOperand(Idx);
assert(MO.isImm() && "Unexpected MO type.");
return 1 << MO.getImm();
}
MCFixupKind getTargetFixup(const MCExpr *Expr) const;
template <llvm::CSKY::Fixups FIXUP>
unsigned getBranchSymbolOpValue(const MCInst &MI, unsigned Idx,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const {
const MCOperand &MO = MI.getOperand(Idx);
if (MO.isImm())
return MO.getImm() >> 1;
assert(MO.isExpr() && "Unexpected MO type.");
MCFixupKind Kind = MCFixupKind(FIXUP);
if (MO.getExpr()->getKind() == MCExpr::Target)
Kind = getTargetFixup(MO.getExpr());
Fixups.push_back(MCFixup::create(0, MO.getExpr(), Kind, MI.getLoc()));
return 0;
}
template <llvm::CSKY::Fixups FIXUP>
unsigned getConstpoolSymbolOpValue(const MCInst &MI, unsigned Idx,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const {
const MCOperand &MO = MI.getOperand(Idx);
assert(MO.isExpr() && "Unexpected MO type.");
MCFixupKind Kind = MCFixupKind(FIXUP);
if (MO.getExpr()->getKind() == MCExpr::Target)
Kind = getTargetFixup(MO.getExpr());
Fixups.push_back(MCFixup::create(0, MO.getExpr(), Kind, MI.getLoc()));
return 0;
}
unsigned getCallSymbolOpValue(const MCInst &MI, unsigned Idx,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const {
const MCOperand &MO = MI.getOperand(Idx);
assert(MO.isExpr() && "Unexpected MO type.");
MCFixupKind Kind = MCFixupKind(CSKY::fixup_csky_pcrel_imm26_scale2);
if (MO.getExpr()->getKind() == MCExpr::Target)
Kind = getTargetFixup(MO.getExpr());
Fixups.push_back(MCFixup::create(0, MO.getExpr(), Kind, MI.getLoc()));
return 0;
}
unsigned getBareSymbolOpValue(const MCInst &MI, unsigned Idx,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const {
const MCOperand &MO = MI.getOperand(Idx);
assert(MO.isExpr() && "Unexpected MO type.");
MCFixupKind Kind = MCFixupKind(CSKY::fixup_csky_pcrel_imm18_scale2);
if (MO.getExpr()->getKind() == MCExpr::Target)
Kind = getTargetFixup(MO.getExpr());
Fixups.push_back(MCFixup::create(0, MO.getExpr(), Kind, MI.getLoc()));
return 0;
}
};
} // namespace llvm
#endif // LLVM_LIB_TARGET_CSKY_MCTARGETDESC_CSKYMCCODEEMITTER_H
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