1 //===-- X86ShuffleDecode.h - X86 shuffle decode logic -----------*-C++-*---===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Define several functions to decode x86 specific shuffle semantics into a
11 // generic vector mask.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_LIB_TARGET_X86_UTILS_X86SHUFFLEDECODE_H
16 #define LLVM_LIB_TARGET_X86_UTILS_X86SHUFFLEDECODE_H
18 #include "llvm/ADT/SmallVector.h"
19 #include "llvm/ADT/ArrayRef.h"
21 //===----------------------------------------------------------------------===//
22 // Vector Mask Decoding
23 //===----------------------------------------------------------------------===//
29 enum { SM_SentinelUndef = -1, SM_SentinelZero = -2 };
31 void DecodeINSERTPSMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
34 void DecodeMOVHLPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask);
37 void DecodeMOVLHPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask);
39 void DecodeMOVSLDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
41 void DecodeMOVSHDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
43 void DecodeMOVDDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
45 void DecodePSLLDQMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
47 void DecodePSRLDQMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
49 void DecodePALIGNRMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
51 void DecodePSHUFMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
53 void DecodePSHUFHWMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
55 void DecodePSHUFLWMask(MVT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
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
60 void DecodeSHUFPMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
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);
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);
72 /// \brief Decode a PSHUFB mask from an IR-level vector constant.
73 void DecodePSHUFBMask(const Constant *C, SmallVectorImpl<int> &ShuffleMask);
75 /// \brief Decode a PSHUFB mask from a raw array of constants such as from
77 void DecodePSHUFBMask(ArrayRef<uint64_t> RawMask,
78 SmallVectorImpl<int> &ShuffleMask);
80 /// \brief Decode a BLEND immediate mask into a shuffle mask.
81 void DecodeBLENDMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
83 void DecodeVPERM2X128Mask(MVT VT, unsigned Imm,
84 SmallVectorImpl<int> &ShuffleMask);
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);
90 /// \brief Decode a VPERMILP variable mask from an IR-level vector constant.
91 void DecodeVPERMILPMask(const Constant *C, SmallVectorImpl<int> &ShuffleMask);
93 /// \brief Decode a zero extension instruction as a shuffle mask.
94 void DecodeZeroExtendMask(MVT SrcVT, MVT DstVT,
95 SmallVectorImpl<int> &ShuffleMask);
97 /// \brief Decode a move lower and zero upper instruction as a shuffle mask.
98 void DecodeZeroMoveLowMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
100 /// \brief Decode a scalar float move instruction as a shuffle mask.
101 void DecodeScalarMoveMask(MVT VT, bool IsLoad,
102 SmallVectorImpl<int> &ShuffleMask);