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//=- LoongArchInstrInfo.cpp - LoongArch Instruction Information -*- C++ -*-===//
//
// 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 contains the LoongArch implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//
#include "LoongArchInstrInfo.h"
#include "LoongArch.h"
#include "LoongArchMachineFunctionInfo.h"
using namespace llvm;
#define GET_INSTRINFO_CTOR_DTOR
#include "LoongArchGenInstrInfo.inc"
LoongArchInstrInfo::LoongArchInstrInfo(LoongArchSubtarget &STI)
: LoongArchGenInstrInfo(LoongArch::ADJCALLSTACKDOWN,
LoongArch::ADJCALLSTACKUP) {}
void LoongArchInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI,
const DebugLoc &DL, MCRegister DstReg,
MCRegister SrcReg, bool KillSrc) const {
if (LoongArch::GPRRegClass.contains(DstReg, SrcReg)) {
BuildMI(MBB, MBBI, DL, get(LoongArch::OR), DstReg)
.addReg(SrcReg, getKillRegState(KillSrc))
.addReg(LoongArch::R0);
return;
}
// FPR->FPR copies.
unsigned Opc;
if (LoongArch::FPR32RegClass.contains(DstReg, SrcReg)) {
Opc = LoongArch::FMOV_S;
} else if (LoongArch::FPR64RegClass.contains(DstReg, SrcReg)) {
Opc = LoongArch::FMOV_D;
} else {
// TODO: support other copies.
llvm_unreachable("Impossible reg-to-reg copy");
}
BuildMI(MBB, MBBI, DL, get(Opc), DstReg)
.addReg(SrcReg, getKillRegState(KillSrc));
}
void LoongArchInstrInfo::storeRegToStackSlot(
MachineBasicBlock &MBB, MachineBasicBlock::iterator I, Register SrcReg,
bool IsKill, int FI, const TargetRegisterClass *RC,
const TargetRegisterInfo *TRI) const {
DebugLoc DL;
if (I != MBB.end())
DL = I->getDebugLoc();
MachineFunction *MF = MBB.getParent();
MachineFrameInfo &MFI = MF->getFrameInfo();
unsigned Opcode;
if (LoongArch::GPRRegClass.hasSubClassEq(RC))
Opcode = TRI->getRegSizeInBits(LoongArch::GPRRegClass) == 32
? LoongArch::ST_W
: LoongArch::ST_D;
else if (LoongArch::FPR32RegClass.hasSubClassEq(RC))
Opcode = LoongArch::FST_S;
else if (LoongArch::FPR64RegClass.hasSubClassEq(RC))
Opcode = LoongArch::FST_D;
else
llvm_unreachable("Can't store this register to stack slot");
MachineMemOperand *MMO = MF->getMachineMemOperand(
MachinePointerInfo::getFixedStack(*MF, FI), MachineMemOperand::MOStore,
MFI.getObjectSize(FI), MFI.getObjectAlign(FI));
BuildMI(MBB, I, DL, get(Opcode))
.addReg(SrcReg, getKillRegState(IsKill))
.addFrameIndex(FI)
.addImm(0)
.addMemOperand(MMO);
}
void LoongArchInstrInfo::loadRegFromStackSlot(
MachineBasicBlock &MBB, MachineBasicBlock::iterator I, Register DstReg,
int FI, const TargetRegisterClass *RC,
const TargetRegisterInfo *TRI) const {
DebugLoc DL;
if (I != MBB.end())
DL = I->getDebugLoc();
MachineFunction *MF = MBB.getParent();
MachineFrameInfo &MFI = MF->getFrameInfo();
unsigned Opcode;
if (LoongArch::GPRRegClass.hasSubClassEq(RC))
Opcode = TRI->getRegSizeInBits(LoongArch::GPRRegClass) == 32
? LoongArch::LD_W
: LoongArch::LD_D;
else if (LoongArch::FPR32RegClass.hasSubClassEq(RC))
Opcode = LoongArch::FLD_S;
else if (LoongArch::FPR64RegClass.hasSubClassEq(RC))
Opcode = LoongArch::FLD_D;
else
llvm_unreachable("Can't load this register from stack slot");
MachineMemOperand *MMO = MF->getMachineMemOperand(
MachinePointerInfo::getFixedStack(*MF, FI), MachineMemOperand::MOLoad,
MFI.getObjectSize(FI), MFI.getObjectAlign(FI));
BuildMI(MBB, I, DL, get(Opcode), DstReg)
.addFrameIndex(FI)
.addImm(0)
.addMemOperand(MMO);
}
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