llvm/lib/Target/X86/X86ShuffleDecodeConstantPool.h

   1 //===-- X86ShuffleDecodeConstantPool.h - X86 shuffle decode -----*-C++-*---===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // Define several functions to decode x86 specific shuffle semantics using
  10 // constants from the constant pool.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_LIB_TARGET_X86_X86SHUFFLEDECODECONSTANTPOOL_H
  15 #define LLVM_LIB_TARGET_X86_X86SHUFFLEDECODECONSTANTPOOL_H
  16
  17 //===----------------------------------------------------------------------===//
  18 //  Vector Mask Decoding
  19 //===----------------------------------------------------------------------===//
  20
  21 namespace llvm {
  22 class Constant;
  23 template <typename T> class SmallVectorImpl;
  24
  25 /// Decode a PSHUFB mask from an IR-level vector constant.
  26 void DecodePSHUFBMask(const Constant *C, unsigned Width,
  27                       SmallVectorImpl<int> &ShuffleMask);
  28
  29 /// Decode a VPERMILP variable mask from an IR-level vector constant.
  30 void DecodeVPERMILPMask(const Constant *C, unsigned ElSize, unsigned Width,
  31                         SmallVectorImpl<int> &ShuffleMask);
  32
  33 /// Decode a VPERMILP2 variable mask from an IR-level vector constant.
  34 void DecodeVPERMIL2PMask(const Constant *C, unsigned M2Z, unsigned ElSize,
  35                          unsigned Width, SmallVectorImpl<int> &ShuffleMask);
  36
  37 /// Decode a VPPERM variable mask from an IR-level vector constant.
  38 void DecodeVPPERMMask(const Constant *C, unsigned Width,
  39                       SmallVectorImpl<int> &ShuffleMask);
  40
  41 } // llvm namespace
  42
  43 #endif