167 lines
7.1 KiB
C++
167 lines
7.1 KiB
C++
//===-- X86ShuffleDecode.h - X86 shuffle decode logic -----------*-C++-*---===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Define several functions to decode x86 specific shuffle semantics into a
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// generic vector mask.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_X86_UTILS_X86SHUFFLEDECODE_H
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#define LLVM_LIB_TARGET_X86_UTILS_X86SHUFFLEDECODE_H
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#include <cstdint>
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//===----------------------------------------------------------------------===//
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// Vector Mask Decoding
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//===----------------------------------------------------------------------===//
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namespace llvm {
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class APInt;
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template <typename T> class ArrayRef;
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template <typename T> class SmallVectorImpl;
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enum { SM_SentinelUndef = -1, SM_SentinelZero = -2 };
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/// Decode a 128-bit INSERTPS instruction as a v4f32 shuffle mask.
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void DecodeINSERTPSMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
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// Insert the bottom Len elements from a second source into a vector starting at
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// element Idx.
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void DecodeInsertElementMask(unsigned NumElts, unsigned Idx, unsigned Len,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decode a MOVHLPS instruction as a v2f64/v4f32 shuffle mask.
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/// i.e. <3,1> or <6,7,2,3>
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void DecodeMOVHLPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask);
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/// Decode a MOVLHPS instruction as a v2f64/v4f32 shuffle mask.
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/// i.e. <0,2> or <0,1,4,5>
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void DecodeMOVLHPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask);
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void DecodeMOVSLDUPMask(unsigned NumElts, SmallVectorImpl<int> &ShuffleMask);
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void DecodeMOVSHDUPMask(unsigned NumElts, SmallVectorImpl<int> &ShuffleMask);
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void DecodeMOVDDUPMask(unsigned NumElts, SmallVectorImpl<int> &ShuffleMask);
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void DecodePSLLDQMask(unsigned NumElts, unsigned Imm,
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SmallVectorImpl<int> &ShuffleMask);
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void DecodePSRLDQMask(unsigned NumElts, unsigned Imm,
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SmallVectorImpl<int> &ShuffleMask);
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void DecodePALIGNRMask(unsigned NumElts, unsigned Imm,
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SmallVectorImpl<int> &ShuffleMask);
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void DecodeVALIGNMask(unsigned NumElts, unsigned Imm,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decodes the shuffle masks for pshufd/pshufw/vpermilpd/vpermilps.
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void DecodePSHUFMask(unsigned NumElts, unsigned ScalarBits, unsigned Imm,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decodes the shuffle masks for pshufhw.
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void DecodePSHUFHWMask(unsigned NumElts, unsigned Imm,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decodes the shuffle masks for pshuflw.
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void DecodePSHUFLWMask(unsigned NumElts, unsigned Imm,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decodes a PSWAPD 3DNow! instruction.
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void DecodePSWAPMask(unsigned NumElts, SmallVectorImpl<int> &ShuffleMask);
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/// Decodes the shuffle masks for shufp*.
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void DecodeSHUFPMask(unsigned NumElts, unsigned ScalarBits, unsigned Imm,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decodes the shuffle masks for unpckhps/unpckhpd and punpckh*.
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void DecodeUNPCKHMask(unsigned NumElts, unsigned ScalarBits,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decodes the shuffle masks for unpcklps/unpcklpd and punpckl*.
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void DecodeUNPCKLMask(unsigned NumElts, unsigned ScalarBits,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decodes a broadcast of the first element of a vector.
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void DecodeVectorBroadcast(unsigned NumElts, SmallVectorImpl<int> &ShuffleMask);
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/// Decodes a broadcast of a subvector to a larger vector type.
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void DecodeSubVectorBroadcast(unsigned DstNumElts, unsigned SrcNumElts,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decode a PSHUFB mask from a raw array of constants such as from
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/// BUILD_VECTOR.
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void DecodePSHUFBMask(ArrayRef<uint64_t> RawMask, const APInt &UndefElts,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decode a BLEND immediate mask into a shuffle mask.
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void DecodeBLENDMask(unsigned NumElts, unsigned Imm,
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SmallVectorImpl<int> &ShuffleMask);
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void DecodeVPERM2X128Mask(unsigned NumElts, unsigned Imm,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decode a shuffle packed values at 128-bit granularity
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/// (SHUFF32x4/SHUFF64x2/SHUFI32x4/SHUFI64x2)
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/// immediate mask into a shuffle mask.
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void decodeVSHUF64x2FamilyMask(unsigned NumElts, unsigned ScalarSize,
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unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
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/// Decodes the shuffle masks for VPERMQ/VPERMPD.
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void DecodeVPERMMask(unsigned NumElts, unsigned Imm,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decode a VPPERM mask from a raw array of constants such as from
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/// BUILD_VECTOR.
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/// This can only basic masks (permutes + zeros), not any of the other
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/// operations that VPPERM can perform.
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void DecodeVPPERMMask(ArrayRef<uint64_t> RawMask, const APInt &UndefElts,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decode a zero extension instruction as a shuffle mask.
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void DecodeZeroExtendMask(unsigned SrcScalarBits, unsigned DstScalarBits,
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unsigned NumDstElts, bool IsAnyExtend,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decode a move lower and zero upper instruction as a shuffle mask.
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void DecodeZeroMoveLowMask(unsigned NumElts, SmallVectorImpl<int> &ShuffleMask);
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/// Decode a scalar float move instruction as a shuffle mask.
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void DecodeScalarMoveMask(unsigned NumElts, bool IsLoad,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decode a SSE4A EXTRQ instruction as a shuffle mask.
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void DecodeEXTRQIMask(unsigned NumElts, unsigned EltSize, int Len, int Idx,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decode a SSE4A INSERTQ instruction as a shuffle mask.
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void DecodeINSERTQIMask(unsigned NumElts, unsigned EltSize, int Len, int Idx,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decode a VPERMILPD/VPERMILPS variable mask from a raw array of constants.
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void DecodeVPERMILPMask(unsigned NumElts, unsigned ScalarBits,
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ArrayRef<uint64_t> RawMask, const APInt &UndefElts,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decode a VPERMIL2PD/VPERMIL2PS variable mask from a raw array of constants.
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void DecodeVPERMIL2PMask(unsigned NumElts, unsigned ScalarBits, unsigned M2Z,
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ArrayRef<uint64_t> RawMask, const APInt &UndefElts,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decode a VPERM W/D/Q/PS/PD mask from a raw array of constants.
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void DecodeVPERMVMask(ArrayRef<uint64_t> RawMask, const APInt &UndefElts,
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SmallVectorImpl<int> &ShuffleMask);
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/// Decode a VPERMT2 W/D/Q/PS/PD mask from a raw array of constants.
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void DecodeVPERMV3Mask(ArrayRef<uint64_t> RawMask, const APInt &UndefElts,
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SmallVectorImpl<int> &ShuffleMask);
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} // llvm namespace
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#endif
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