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