llvm/llvm/lib/Target/X86/X86ShuffleDecodeConstantPool.cpp

//===-- X86ShuffleDecodeConstantPool.cpp - X86 shuffle decode -------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Define several functions to decode x86 specific shuffle semantics using
// constants from the constant pool.
//
//===----------------------------------------------------------------------===//

#include "X86ShuffleDecodeConstantPool.h"
#include "MCTargetDesc/X86ShuffleDecode.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/IR/Constants.h"

//===----------------------------------------------------------------------===//
//  Vector Mask Decoding
//===----------------------------------------------------------------------===//

namespace llvm {

static bool extractConstantMask(const Constant *C, unsigned MaskEltSizeInBits,
                                APInt &UndefElts,
                                SmallVectorImpl<uint64_t> &RawMask) { … }

void DecodePSHUFBMask(const Constant *C, unsigned Width,
                      SmallVectorImpl<int> &ShuffleMask) { … }

void DecodeVPERMILPMask(const Constant *C, unsigned ElSize, unsigned Width,
                        SmallVectorImpl<int> &ShuffleMask) { … }

void DecodeVPERMIL2PMask(const Constant *C, unsigned M2Z, unsigned ElSize,
                         unsigned Width, SmallVectorImpl<int> &ShuffleMask) { … }

void DecodeVPPERMMask(const Constant *C, unsigned Width,
                      SmallVectorImpl<int> &ShuffleMask) { … }

} // namespace llvm