72 lines
2.5 KiB
C++
72 lines
2.5 KiB
C++
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//===-- CSKYMCCodeEmitter.cpp - CSKY Code Emitter interface ---------------===//
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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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//
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// This file implements the CSKYMCCodeEmitter class.
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//
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//===----------------------------------------------------------------------===//
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#include "CSKYMCCodeEmitter.h"
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#include "MCTargetDesc/CSKYMCTargetDesc.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/MC/MCInstBuilder.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/Support/EndianStream.h"
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using namespace llvm;
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#define DEBUG_TYPE "csky-mccode-emitter"
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STATISTIC(MCNumEmitted, "Number of MC instructions emitted");
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unsigned CSKYMCCodeEmitter::getOImmOpValue(const MCInst &MI, unsigned Idx,
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SmallVectorImpl<MCFixup> &Fixups,
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const MCSubtargetInfo &STI) const {
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const MCOperand &MO = MI.getOperand(Idx);
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assert(MO.isImm() && "Unexpected MO type.");
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return MO.getImm() - 1;
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}
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void CSKYMCCodeEmitter::encodeInstruction(const MCInst &MI, raw_ostream &OS,
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SmallVectorImpl<MCFixup> &Fixups,
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const MCSubtargetInfo &STI) const {
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const MCInstrDesc &Desc = MII.get(MI.getOpcode());
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unsigned Size = Desc.getSize();
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uint32_t Bin = getBinaryCodeForInstr(MI, Fixups, STI);
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uint16_t LO16 = static_cast<uint16_t>(Bin);
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uint16_t HI16 = static_cast<uint16_t>(Bin >> 16);
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if (Size == 4)
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support::endian::write<uint16_t>(OS, HI16, support::little);
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support::endian::write<uint16_t>(OS, LO16, support::little);
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++MCNumEmitted; // Keep track of the # of mi's emitted.
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}
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unsigned
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CSKYMCCodeEmitter::getMachineOpValue(const MCInst &MI, const MCOperand &MO,
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SmallVectorImpl<MCFixup> &Fixups,
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const MCSubtargetInfo &STI) const {
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if (MO.isReg())
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return Ctx.getRegisterInfo()->getEncodingValue(MO.getReg());
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if (MO.isImm())
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return static_cast<unsigned>(MO.getImm());
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llvm_unreachable("Unhandled expression!");
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return 0;
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}
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MCCodeEmitter *llvm::createCSKYMCCodeEmitter(const MCInstrInfo &MCII,
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const MCRegisterInfo &MRI,
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MCContext &Ctx) {
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return new CSKYMCCodeEmitter(Ctx, MCII);
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}
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#include "CSKYGenMCCodeEmitter.inc"
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