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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.
//
//===----------------------------------------------------------------------===//
#include "CSKYMCCodeEmitter.h"
#include "MCTargetDesc/CSKYMCTargetDesc.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/MC/MCInstBuilder.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/Support/EndianStream.h"
using namespace llvm;
#define DEBUG_TYPE "csky-mccode-emitter"
STATISTIC(MCNumEmitted, "Number of MC instructions emitted");
unsigned CSKYMCCodeEmitter::getOImmOpValue(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() - 1;
}
void CSKYMCCodeEmitter::encodeInstruction(const MCInst &MI, raw_ostream &OS,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const {
const MCInstrDesc &Desc = MII.get(MI.getOpcode());
unsigned Size = Desc.getSize();
uint32_t Bin = getBinaryCodeForInstr(MI, Fixups, STI);
uint16_t LO16 = static_cast<uint16_t>(Bin);
uint16_t HI16 = static_cast<uint16_t>(Bin >> 16);
if (Size == 4)
support::endian::write<uint16_t>(OS, HI16, support::little);
support::endian::write<uint16_t>(OS, LO16, support::little);
++MCNumEmitted; // Keep track of the # of mi's emitted.
}
unsigned
CSKYMCCodeEmitter::getMachineOpValue(const MCInst &MI, const MCOperand &MO,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const {
if (MO.isReg())
return Ctx.getRegisterInfo()->getEncodingValue(MO.getReg());
if (MO.isImm())
return static_cast<unsigned>(MO.getImm());
llvm_unreachable("Unhandled expression!");
return 0;
}
MCFixupKind CSKYMCCodeEmitter::getTargetFixup(const MCExpr *Expr) const {
const CSKYMCExpr *CSKYExpr = cast<CSKYMCExpr>(Expr);
switch (CSKYExpr->getKind()) {
default:
llvm_unreachable("Unhandled fixup kind!");
case CSKYMCExpr::VK_CSKY_ADDR:
return MCFixupKind(CSKY::fixup_csky_addr32);
}
}
MCCodeEmitter *llvm::createCSKYMCCodeEmitter(const MCInstrInfo &MCII,
const MCRegisterInfo &MRI,
MCContext &Ctx) {
return new CSKYMCCodeEmitter(Ctx, MCII);
}
#include "CSKYGenMCCodeEmitter.inc"
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