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📄 ConstantPools.h(3.35 KB)
📄 LaneBitmask.h(3.24 KB)
📄 MCAsmBackend.h(8.09 KB)
📄 MCAsmInfo.h(25.48 KB)
📄 MCAsmInfoCOFF.h(900 B)
📄 MCAsmInfoDarwin.h(927 B)
📄 MCAsmInfoELF.h(711 B)
📄 MCAsmInfoWasm.h(612 B)
📄 MCAsmInfoXCOFF.h(792 B)
📄 MCAsmLayout.h(3.75 KB)
📄 MCAsmMacro.h(4.54 KB)
📄 MCAssembler.h(16.1 KB)
📄 MCCodeEmitter.h(1.53 KB)
📄 MCCodeView.h(9.03 KB)
📄 MCContext.h(31.99 KB)
📄 MCDirectives.h(3.12 KB)
📁 MCDisassembler
📄 MCDwarf.h(21.46 KB)
📄 MCELFObjectWriter.h(5.27 KB)
📄 MCELFStreamer.h(3.97 KB)
📄 MCExpr.h(21.55 KB)
📄 MCFixedLenDisassembler.h(1.39 KB)
📄 MCFixup.h(7.4 KB)
📄 MCFixupKindInfo.h(1.6 KB)
📄 MCFragment.h(17.72 KB)
📄 MCInst.h(6.06 KB)
📄 MCInstBuilder.h(1.76 KB)
📄 MCInstPrinter.h(5.88 KB)
📄 MCInstrAnalysis.h(6.8 KB)
📄 MCInstrDesc.h(25.13 KB)
📄 MCInstrInfo.h(2.93 KB)
📄 MCInstrItineraries.h(9.02 KB)
📄 MCLabel.h(1.63 KB)
📄 MCLinkerOptimizationHint.h(5.73 KB)
📄 MCMachObjectWriter.h(9.77 KB)
📄 MCObjectFileInfo.h(16.57 KB)
📄 MCObjectStreamer.h(8.78 KB)
📄 MCObjectWriter.h(4.44 KB)
📁 MCParser
📄 MCRegister.h(4.16 KB)
📄 MCRegisterInfo.h(28.96 KB)
📄 MCSchedule.h(16.25 KB)
📄 MCSection.h(6.52 KB)
📄 MCSectionCOFF.h(3.37 KB)
📄 MCSectionELF.h(3.3 KB)
📄 MCSectionMachO.h(3.15 KB)
📄 MCSectionWasm.h(2.78 KB)
📄 MCSectionXCOFF.h(3.22 KB)
📄 MCStreamer.h(43.55 KB)
📄 MCSubtargetInfo.h(10.04 KB)
📄 MCSymbol.h(13.8 KB)
📄 MCSymbolCOFF.h(1.62 KB)
📄 MCSymbolELF.h(1.45 KB)
📄 MCSymbolMachO.h(4.18 KB)
📄 MCSymbolWasm.h(4.28 KB)
📄 MCSymbolXCOFF.h(2.39 KB)
📄 MCTargetOptions.h(2.29 KB)
📄 MCTargetOptionsCommandFlags.h(1.26 KB)
📄 MCValue.h(2.42 KB)
📄 MCWasmObjectWriter.h(1.61 KB)
📄 MCWasmStreamer.h(2.83 KB)
📄 MCWin64EH.h(2.41 KB)
📄 MCWinCOFFObjectWriter.h(1.81 KB)
📄 MCWinCOFFStreamer.h(3.05 KB)
📄 MCWinEH.h(1.97 KB)
📄 MCXCOFFObjectWriter.h(1.45 KB)
📄 MCXCOFFStreamer.h(1.86 KB)
📄 MachineLocation.h(2.04 KB)
📄 SectionKind.h(7.53 KB)
📄 StringTableBuilder.h(2.47 KB)
📄 SubtargetFeature.h(7.12 KB)

Editing: LaneBitmask.h

//===- llvm/MC/LaneBitmask.h ------------------------------------*- 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// A common definition of LaneBitmask for use in TableGen and CodeGen.
///
/// A lane mask is a bitmask representing the covering of a register with
/// sub-registers.
///
/// This is typically used to track liveness at sub-register granularity.
/// Lane masks for sub-register indices are similar to register units for
/// physical registers. The individual bits in a lane mask can't be assigned
/// any specific meaning. They can be used to check if two sub-register
/// indices overlap.
///
/// Iff the target has a register such that:
///
///   getSubReg(Reg, A) overlaps getSubReg(Reg, B)
///
/// then:
///
///   (getSubRegIndexLaneMask(A) & getSubRegIndexLaneMask(B)) != 0

#ifndef LLVM_MC_LANEBITMASK_H
#define LLVM_MC_LANEBITMASK_H

#include "llvm/Support/Compiler.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/Printable.h"
#include "llvm/Support/raw_ostream.h"

namespace llvm {

struct LaneBitmask {
    // When changing the underlying type, change the format string as well.
    using Type = uint64_t;
    enum : unsigned { BitWidth = 8*sizeof(Type) };
    constexpr static const char *const FormatStr = "%016llX";

constexpr LaneBitmask() = default;
    explicit constexpr LaneBitmask(Type V) : Mask(V) {}

constexpr bool operator== (LaneBitmask M) const { return Mask == M.Mask; }
    constexpr bool operator!= (LaneBitmask M) const { return Mask != M.Mask; }
    constexpr bool operator< (LaneBitmask M)  const { return Mask < M.Mask; }
    constexpr bool none() const { return Mask == 0; }
    constexpr bool any()  const { return Mask != 0; }
    constexpr bool all()  const { return ~Mask == 0; }

constexpr LaneBitmask operator~() const {
      return LaneBitmask(~Mask);
    }
    constexpr LaneBitmask operator|(LaneBitmask M) const {
      return LaneBitmask(Mask | M.Mask);
    }
    constexpr LaneBitmask operator&(LaneBitmask M) const {
      return LaneBitmask(Mask & M.Mask);
    }
    LaneBitmask &operator|=(LaneBitmask M) {
      Mask |= M.Mask;
      return *this;
    }
    LaneBitmask &operator&=(LaneBitmask M) {
      Mask &= M.Mask;
      return *this;
    }

constexpr Type getAsInteger() const { return Mask; }

unsigned getNumLanes() const {
      return countPopulation(Mask);
    }
    unsigned getHighestLane() const {
      return Log2_64(Mask);
    }

static constexpr LaneBitmask getNone() { return LaneBitmask(0); }
    static constexpr LaneBitmask getAll() { return ~LaneBitmask(0); }
    static constexpr LaneBitmask getLane(unsigned Lane) {
      return LaneBitmask(Type(1) << Lane);
    }

private:
    Type Mask = 0;
  };

/// Create Printable object to print LaneBitmasks on a \ref raw_ostream.
  inline Printable PrintLaneMask(LaneBitmask LaneMask) {
    return Printable([LaneMask](raw_ostream &OS) {
      OS << format(LaneBitmask::FormatStr, LaneMask.getAsInteger());
    });
  }

} // end namespace llvm

#endif // LLVM_MC_LANEBITMASK_H

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