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