1 //===-- X86ShuffleDecode.h - X86 shuffle decode logic -----------*-C++-*---===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // Define several functions to decode x86 specific shuffle semantics into a 11 // generic vector mask. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef LLVM_LIB_TARGET_X86_UTILS_X86SHUFFLEDECODE_H 16 #define LLVM_LIB_TARGET_X86_UTILS_X86SHUFFLEDECODE_H 17 18 #include "llvm/ADT/SmallVector.h" 19 #include "llvm/ADT/ArrayRef.h" 20 21 //===----------------------------------------------------------------------===// 22 // Vector Mask Decoding 23 //===----------------------------------------------------------------------===// 24 25 namespace llvm { 26 class Constant; 27 class MVT; 28 29 enum { SM_SentinelUndef = -1, SM_SentinelZero = -2 }; 30 31 void DecodeINSERTPSMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask); 32 33 // <3,1> or <6,7,2,3> 34 void DecodeMOVHLPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask); 35 36 // <0,2> or <0,1,4,5> 37 void DecodeMOVLHPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask); 38 39 void DecodeMOVSLDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask); 40 41 void DecodeMOVSHDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask); 42 43 void DecodeMOVDDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask); 44 45 void DecodePSLLDQMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask); 46 47 void DecodePSRLDQMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask); 48 49 void DecodePALIGNRMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask); 50 51 void DecodePSHUFMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask); 52 53 void DecodePSHUFHWMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask); 54 55 void DecodePSHUFLWMask(MVT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask); 56 57 /// DecodeSHUFPMask - This decodes the shuffle masks for shufp*. VT indicates 58 /// the type of the vector allowing it to handle different datatypes and vector 59 /// widths. 60 void DecodeSHUFPMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask); 61 62 /// DecodeUNPCKHMask - This decodes the shuffle masks for unpckhps/unpckhpd 63 /// and punpckh*. VT indicates the type of the vector allowing it to handle 64 /// different datatypes and vector widths. 65 void DecodeUNPCKHMask(MVT VT, SmallVectorImpl<int> &ShuffleMask); 66 67 /// DecodeUNPCKLMask - This decodes the shuffle masks for unpcklps/unpcklpd 68 /// and punpckl*. VT indicates the type of the vector allowing it to handle 69 /// different datatypes and vector widths. 70 void DecodeUNPCKLMask(MVT VT, SmallVectorImpl<int> &ShuffleMask); 71 72 /// \brief Decode a PSHUFB mask from an IR-level vector constant. 73 void DecodePSHUFBMask(const Constant *C, SmallVectorImpl<int> &ShuffleMask); 74 75 /// \brief Decode a PSHUFB mask from a raw array of constants such as from 76 /// BUILD_VECTOR. 77 void DecodePSHUFBMask(ArrayRef<uint64_t> RawMask, 78 SmallVectorImpl<int> &ShuffleMask); 79 80 /// \brief Decode a BLEND immediate mask into a shuffle mask. 81 void DecodeBLENDMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask); 82 83 void DecodeVPERM2X128Mask(MVT VT, unsigned Imm, 84 SmallVectorImpl<int> &ShuffleMask); 85 86 /// DecodeVPERMMask - this decodes the shuffle masks for VPERMQ/VPERMPD. 87 /// No VT provided since it only works on 256-bit, 4 element vectors. 88 void DecodeVPERMMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask); 89 90 /// \brief Decode a VPERMILP variable mask from an IR-level vector constant. 91 void DecodeVPERMILPMask(const Constant *C, SmallVectorImpl<int> &ShuffleMask); 92 93 /// \brief Decode a zero extension instruction as a shuffle mask. 94 void DecodeZeroExtendMask(MVT SrcVT, MVT DstVT, 95 SmallVectorImpl<int> &ShuffleMask); 96 97 /// \brief Decode a move lower and zero upper instruction as a shuffle mask. 98 void DecodeZeroMoveLowMask(MVT VT, SmallVectorImpl<int> &ShuffleMask); 99 100 /// \brief Decode a scalar float move instruction as a shuffle mask. 101 void DecodeScalarMoveMask(MVT VT, bool IsLoad, 102 SmallVectorImpl<int> &ShuffleMask); 103 } // llvm namespace 104 105 #endif 106