1 //===-- X86ShuffleDecode.h - X86 shuffle decode logic -----------*-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 into a 10 // generic vector mask. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_LIB_TARGET_X86_UTILS_X86SHUFFLEDECODE_H 15 #define LLVM_LIB_TARGET_X86_UTILS_X86SHUFFLEDECODE_H 16 17 #include <cstdint> 18 19 //===----------------------------------------------------------------------===// 20 // Vector Mask Decoding 21 //===----------------------------------------------------------------------===// 22 23 namespace llvm { 24 class APInt; 25 template <typename T> class ArrayRef; 26 template <typename T> class SmallVectorImpl; 27 28 enum { SM_SentinelUndef = -1, SM_SentinelZero = -2 }; 29 30 /// Decode a 128-bit INSERTPS instruction as a v4f32 shuffle mask. 31 void DecodeINSERTPSMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask); 32 33 // Insert the bottom Len elements from a second source into a vector starting at 34 // element Idx. 35 void DecodeInsertElementMask(unsigned NumElts, unsigned Idx, unsigned Len, 36 SmallVectorImpl<int> &ShuffleMask); 37 38 /// Decode a MOVHLPS instruction as a v2f64/v4f32 shuffle mask. 39 /// i.e. <3,1> or <6,7,2,3> 40 void DecodeMOVHLPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask); 41 42 /// Decode a MOVLHPS instruction as a v2f64/v4f32 shuffle mask. 43 /// i.e. <0,2> or <0,1,4,5> 44 void DecodeMOVLHPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask); 45 46 void DecodeMOVSLDUPMask(unsigned NumElts, SmallVectorImpl<int> &ShuffleMask); 47 48 void DecodeMOVSHDUPMask(unsigned NumElts, SmallVectorImpl<int> &ShuffleMask); 49 50 void DecodeMOVDDUPMask(unsigned NumElts, SmallVectorImpl<int> &ShuffleMask); 51 52 void DecodePSLLDQMask(unsigned NumElts, unsigned Imm, 53 SmallVectorImpl<int> &ShuffleMask); 54 55 void DecodePSRLDQMask(unsigned NumElts, unsigned Imm, 56 SmallVectorImpl<int> &ShuffleMask); 57 58 void DecodePALIGNRMask(unsigned NumElts, unsigned Imm, 59 SmallVectorImpl<int> &ShuffleMask); 60 61 void DecodeVALIGNMask(unsigned NumElts, unsigned Imm, 62 SmallVectorImpl<int> &ShuffleMask); 63 64 /// Decodes the shuffle masks for pshufd/pshufw/vpermilpd/vpermilps. 65 void DecodePSHUFMask(unsigned NumElts, unsigned ScalarBits, unsigned Imm, 66 SmallVectorImpl<int> &ShuffleMask); 67 68 /// Decodes the shuffle masks for pshufhw. 69 void DecodePSHUFHWMask(unsigned NumElts, unsigned Imm, 70 SmallVectorImpl<int> &ShuffleMask); 71 72 /// Decodes the shuffle masks for pshuflw. 73 void DecodePSHUFLWMask(unsigned NumElts, unsigned Imm, 74 SmallVectorImpl<int> &ShuffleMask); 75 76 /// Decodes a PSWAPD 3DNow! instruction. 77 void DecodePSWAPMask(unsigned NumElts, SmallVectorImpl<int> &ShuffleMask); 78 79 /// Decodes the shuffle masks for shufp*. 80 void DecodeSHUFPMask(unsigned NumElts, unsigned ScalarBits, unsigned Imm, 81 SmallVectorImpl<int> &ShuffleMask); 82 83 /// Decodes the shuffle masks for unpckhps/unpckhpd and punpckh*. 84 void DecodeUNPCKHMask(unsigned NumElts, unsigned ScalarBits, 85 SmallVectorImpl<int> &ShuffleMask); 86 87 /// Decodes the shuffle masks for unpcklps/unpcklpd and punpckl*. 88 void DecodeUNPCKLMask(unsigned NumElts, unsigned ScalarBits, 89 SmallVectorImpl<int> &ShuffleMask); 90 91 /// Decodes a broadcast of the first element of a vector. 92 void DecodeVectorBroadcast(unsigned NumElts, SmallVectorImpl<int> &ShuffleMask); 93 94 /// Decodes a broadcast of a subvector to a larger vector type. 95 void DecodeSubVectorBroadcast(unsigned DstNumElts, unsigned SrcNumElts, 96 SmallVectorImpl<int> &ShuffleMask); 97 98 /// Decode a PSHUFB mask from a raw array of constants such as from 99 /// BUILD_VECTOR. 100 void DecodePSHUFBMask(ArrayRef<uint64_t> RawMask, const APInt &UndefElts, 101 SmallVectorImpl<int> &ShuffleMask); 102 103 /// Decode a BLEND immediate mask into a shuffle mask. 104 void DecodeBLENDMask(unsigned NumElts, unsigned Imm, 105 SmallVectorImpl<int> &ShuffleMask); 106 107 void DecodeVPERM2X128Mask(unsigned NumElts, unsigned Imm, 108 SmallVectorImpl<int> &ShuffleMask); 109 110 /// Decode a shuffle packed values at 128-bit granularity 111 /// (SHUFF32x4/SHUFF64x2/SHUFI32x4/SHUFI64x2) 112 /// immediate mask into a shuffle mask. 113 void decodeVSHUF64x2FamilyMask(unsigned NumElts, unsigned ScalarSize, 114 unsigned Imm, SmallVectorImpl<int> &ShuffleMask); 115 116 /// Decodes the shuffle masks for VPERMQ/VPERMPD. 117 void DecodeVPERMMask(unsigned NumElts, unsigned Imm, 118 SmallVectorImpl<int> &ShuffleMask); 119 120 /// Decode a VPPERM mask from a raw array of constants such as from 121 /// BUILD_VECTOR. 122 /// This can only basic masks (permutes + zeros), not any of the other 123 /// operations that VPPERM can perform. 124 void DecodeVPPERMMask(ArrayRef<uint64_t> RawMask, const APInt &UndefElts, 125 SmallVectorImpl<int> &ShuffleMask); 126 127 /// Decode a zero extension instruction as a shuffle mask. 128 void DecodeZeroExtendMask(unsigned SrcScalarBits, unsigned DstScalarBits, 129 unsigned NumDstElts, bool IsAnyExtend, 130 SmallVectorImpl<int> &ShuffleMask); 131 132 /// Decode a move lower and zero upper instruction as a shuffle mask. 133 void DecodeZeroMoveLowMask(unsigned NumElts, SmallVectorImpl<int> &ShuffleMask); 134 135 /// Decode a scalar float move instruction as a shuffle mask. 136 void DecodeScalarMoveMask(unsigned NumElts, bool IsLoad, 137 SmallVectorImpl<int> &ShuffleMask); 138 139 /// Decode a SSE4A EXTRQ instruction as a shuffle mask. 140 void DecodeEXTRQIMask(unsigned NumElts, unsigned EltSize, int Len, int Idx, 141 SmallVectorImpl<int> &ShuffleMask); 142 143 /// Decode a SSE4A INSERTQ instruction as a shuffle mask. 144 void DecodeINSERTQIMask(unsigned NumElts, unsigned EltSize, int Len, int Idx, 145 SmallVectorImpl<int> &ShuffleMask); 146 147 /// Decode a VPERMILPD/VPERMILPS variable mask from a raw array of constants. 148 void DecodeVPERMILPMask(unsigned NumElts, unsigned ScalarBits, 149 ArrayRef<uint64_t> RawMask, const APInt &UndefElts, 150 SmallVectorImpl<int> &ShuffleMask); 151 152 /// Decode a VPERMIL2PD/VPERMIL2PS variable mask from a raw array of constants. 153 void DecodeVPERMIL2PMask(unsigned NumElts, unsigned ScalarBits, unsigned M2Z, 154 ArrayRef<uint64_t> RawMask, const APInt &UndefElts, 155 SmallVectorImpl<int> &ShuffleMask); 156 157 /// Decode a VPERM W/D/Q/PS/PD mask from a raw array of constants. 158 void DecodeVPERMVMask(ArrayRef<uint64_t> RawMask, const APInt &UndefElts, 159 SmallVectorImpl<int> &ShuffleMask); 160 161 /// Decode a VPERMT2 W/D/Q/PS/PD mask from a raw array of constants. 162 void DecodeVPERMV3Mask(ArrayRef<uint64_t> RawMask, const APInt &UndefElts, 163 SmallVectorImpl<int> &ShuffleMask); 164 } // llvm namespace 165 166 #endif 167
Indexes created Mon Jun 22 00:25:11 UTC 2026