X86ShuffleDecode.h revision 296417 
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
25namespace llvm {
26class MVT;
27
28enum { SM_SentinelUndef = -1, SM_SentinelZero = -2 };
29
30void DecodeINSERTPSMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
31
32// <3,1> or <6,7,2,3>
33void DecodeMOVHLPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask);
34
35// <0,2> or <0,1,4,5>
36void DecodeMOVLHPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask);
37
38void DecodeMOVSLDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
39
40void DecodeMOVSHDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
41
42void DecodeMOVDDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
43
44void DecodePSLLDQMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
45
46void DecodePSRLDQMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
47
48void DecodePALIGNRMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
49
50void DecodePSHUFMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
51
52void DecodePSHUFHWMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
53
54void DecodePSHUFLWMask(MVT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
55
56/// \brief Decodes a PSWAPD 3DNow! instruction.
57void DecodePSWAPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
58
59/// DecodeSHUFPMask - This decodes the shuffle masks for shufp*. VT indicates
60/// the type of the vector allowing it to handle different datatypes and vector
61/// widths.
62void DecodeSHUFPMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
63
64/// DecodeUNPCKHMask - This decodes the shuffle masks for unpckhps/unpckhpd
65/// and punpckh*. VT indicates the type of the vector allowing it to handle
66/// different datatypes and vector widths.
67void DecodeUNPCKHMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
68
69/// DecodeUNPCKLMask - This decodes the shuffle masks for unpcklps/unpcklpd
70/// and punpckl*. VT indicates the type of the vector allowing it to handle
71/// different datatypes and vector widths.
72void DecodeUNPCKLMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
73
74/// \brief Decode a PSHUFB mask from a raw array of constants such as from
75/// BUILD_VECTOR.
76void DecodePSHUFBMask(ArrayRef<uint64_t> RawMask,
77                      SmallVectorImpl<int> &ShuffleMask);
78
79/// \brief Decode a BLEND immediate mask into a shuffle mask.
80void DecodeBLENDMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
81
82void DecodeVPERM2X128Mask(MVT VT, unsigned Imm,
83                          SmallVectorImpl<int> &ShuffleMask);
84
85/// \brief Decode a shuffle packed values at 128-bit granularity
86/// immediate mask into a shuffle mask.
87void decodeVSHUF64x2FamilyMask(MVT VT, unsigned Imm,
88                               SmallVectorImpl<int> &ShuffleMask);
89
90/// DecodeVPERMMask - this decodes the shuffle masks for VPERMQ/VPERMPD.
91/// No VT provided since it only works on 256-bit, 4 element vectors.
92void DecodeVPERMMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
93
94/// \brief Decode a zero extension instruction as a shuffle mask.
95void DecodeZeroExtendMask(MVT SrcVT, MVT DstVT,
96                          SmallVectorImpl<int> &ShuffleMask);
97
98/// \brief Decode a move lower and zero upper instruction as a shuffle mask.
99void DecodeZeroMoveLowMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
100
101/// \brief Decode a scalar float move instruction as a shuffle mask.
102void DecodeScalarMoveMask(MVT VT, bool IsLoad,
103                          SmallVectorImpl<int> &ShuffleMask);
104
105/// \brief Decode a SSE4A EXTRQ instruction as a v16i8 shuffle mask.
106void DecodeEXTRQIMask(int Len, int Idx,
107                      SmallVectorImpl<int> &ShuffleMask);
108
109/// \brief Decode a SSE4A INSERTQ instruction as a v16i8 shuffle mask.
110void DecodeINSERTQIMask(int Len, int Idx,
111                        SmallVectorImpl<int> &ShuffleMask);
112
113/// \brief Decode a VPERM W/D/Q/PS/PD mask from a raw array of constants.
114void DecodeVPERMVMask(ArrayRef<uint64_t> RawMask,
115                      SmallVectorImpl<int> &ShuffleMask);
116
117/// \brief Decode a VPERMT2 W/D/Q/PS/PD mask from a raw array of constants.
118void DecodeVPERMV3Mask(ArrayRef<uint64_t> RawMask,
119                      SmallVectorImpl<int> &ShuffleMask);
120} // llvm namespace
121
122#endif
123