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 DecodePALIGNRMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
45 void DecodePSHUFMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
47 void DecodePSHUFHWMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
49 void DecodePSHUFLWMask(MVT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
51 /// DecodeSHUFPMask - This decodes the shuffle masks for shufp*. VT indicates
52 /// the type of the vector allowing it to handle different datatypes and vector
54 void DecodeSHUFPMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
56 /// DecodeUNPCKHMask - This decodes the shuffle masks for unpckhps/unpckhpd
57 /// and punpckh*. VT indicates the type of the vector allowing it to handle
58 /// different datatypes and vector widths.
59 void DecodeUNPCKHMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
61 /// DecodeUNPCKLMask - This decodes the shuffle masks for unpcklps/unpcklpd
62 /// and punpckl*. VT indicates the type of the vector allowing it to handle
63 /// different datatypes and vector widths.
64 void DecodeUNPCKLMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
66 /// \brief Decode a PSHUFB mask from an IR-level vector constant.
67 void DecodePSHUFBMask(const Constant *C, SmallVectorImpl<int> &ShuffleMask);
69 /// \brief Decode a PSHUFB mask from a raw array of constants such as from
71 void DecodePSHUFBMask(ArrayRef<uint64_t> RawMask,
72 SmallVectorImpl<int> &ShuffleMask);
74 /// \brief Decode a BLEND immediate mask into a shuffle mask.
75 void DecodeBLENDMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
77 void DecodeVPERM2X128Mask(MVT VT, unsigned Imm,
78 SmallVectorImpl<int> &ShuffleMask);
80 /// DecodeVPERMMask - this decodes the shuffle masks for VPERMQ/VPERMPD.
81 /// No VT provided since it only works on 256-bit, 4 element vectors.
82 void DecodeVPERMMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
84 /// \brief Decode a VPERMILP variable mask from an IR-level vector constant.
85 void DecodeVPERMILPMask(const Constant *C, SmallVectorImpl<int> &ShuffleMask);