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//===- LoongArchMatInt.cpp - Immediate materialisation ---------*- 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
//
//===----------------------------------------------------------------------===//
#include "LoongArchMatInt.h"
#include "MCTargetDesc/LoongArchMCTargetDesc.h"
#include "llvm/Support/MathExtras.h"
using namespace llvm;
LoongArchMatInt::InstSeq LoongArchMatInt::generateInstSeq(int64_t Val) {
// Val:
// | hi32 | lo32 |
// +-----------+------------------+------------------+-----------+
// | Highest12 | Higher20 | Hi20 | Lo12 |
// +-----------+------------------+------------------+-----------+
// 63 52 51 32 31 12 11 0
//
const int64_t Highest12 = Val >> 52 & 0xFFF;
const int64_t Higher20 = Val >> 32 & 0xFFFFF;
const int64_t Hi20 = Val >> 12 & 0xFFFFF;
const int64_t Lo12 = Val & 0xFFF;
InstSeq Insts;
if (Highest12 != 0 && SignExtend64<52>(Val) == 0) {
Insts.push_back(Inst(LoongArch::LU52I_D, SignExtend64<12>(Highest12)));
return Insts;
}
if (Hi20 == 0)
Insts.push_back(Inst(LoongArch::ORI, Lo12));
else if (SignExtend32<1>(Lo12 >> 11) == SignExtend32<20>(Hi20))
Insts.push_back(Inst(LoongArch::ADDI_W, SignExtend64<12>(Lo12)));
else {
Insts.push_back(Inst(LoongArch::LU12I_W, SignExtend64<20>(Hi20)));
if (Lo12 != 0)
Insts.push_back(Inst(LoongArch::ORI, Lo12));
}
if (SignExtend32<1>(Hi20 >> 19) != SignExtend32<20>(Higher20))
Insts.push_back(Inst(LoongArch::LU32I_D, SignExtend64<20>(Higher20)));
if (SignExtend32<1>(Higher20 >> 19) != SignExtend32<12>(Highest12))
Insts.push_back(Inst(LoongArch::LU52I_D, SignExtend64<12>(Highest12)));
return Insts;
}
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