llvm/llvm/lib/Target/AArch64/AArch64PerfectShuffle.h

//===-- AArch64PerfectShuffle.h - AdvSIMD Perfect Shuffle Table -----------===//
//
// 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, which was autogenerated by llvm-PerfectShuffle, contains data
// for the optimal way to build a perfect shuffle using AdvSIMD instructions.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_AARCH64_AARCH64PERFECTSHUFFLE_H
#define LLVM_LIB_TARGET_AARCH64_AARCH64PERFECTSHUFFLE_H

#include "llvm/ADT/ArrayRef.h"

namespace llvm {

// 31 entries have cost 0
// 756 entries have cost 1
// 3690 entries have cost 2
// 2084 entries have cost 3

// This table is 6561*4 = 26244 bytes in size.
static const unsigned PerfectShuffleTable[6561 + 1] = …;

inline unsigned getPerfectShuffleCost(llvm::ArrayRef<int> M) { … }

/// Return true for zip1 or zip2 masks of the form:
///  <0,  8, 1,  9, 2, 10, 3, 11> or
///  <4, 12, 5, 13, 6, 14, 7, 15>
inline bool isZIPMask(ArrayRef<int> M, unsigned NumElts,
                      unsigned &WhichResultOut) { … }

/// Return true for uzp1 or uzp2 masks of the form:
///  <0, 2, 4, 6, 8, 10, 12, 14> or
///  <1, 3, 5, 7, 9, 11, 13, 15>
inline bool isUZPMask(ArrayRef<int> M, unsigned NumElts,
                      unsigned &WhichResultOut) { … }

/// Return true for trn1 or trn2 masks of the form:
///  <0, 8, 2, 10, 4, 12, 6, 14> or
///  <1, 9, 3, 11, 5, 13, 7, 15>
inline bool isTRNMask(ArrayRef<int> M, unsigned NumElts,
                      unsigned &WhichResult) { … }

/// isREVMask - Check if a vector shuffle corresponds to a REV
/// instruction with the specified blocksize.  (The order of the elements
/// within each block of the vector is reversed.)
inline bool isREVMask(ArrayRef<int> M, unsigned EltSize, unsigned NumElts,
                      unsigned BlockSize) { … }

} // namespace llvm

#endif