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//===-- X86ShuffleDecode.h - X86 shuffle decode logic -----------*-C++-*---===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Define several functions to decode x86 specific shuffle semantics into a
// generic vector mask.
//
//===----------------------------------------------------------------------===//
#ifndef X86_SHUFFLE_DECODE_H
#define X86_SHUFFLE_DECODE_H
#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/ValueTypes.h"
//===----------------------------------------------------------------------===//
// Vector Mask Decoding
//===----------------------------------------------------------------------===//
namespace llvm {
enum {
SM_SentinelZero = ~0U
};
void DecodeINSERTPSMask(unsigned Imm, SmallVectorImpl<unsigned> &ShuffleMask);
// <3,1> or <6,7,2,3>
void DecodeMOVHLPSMask(unsigned NElts,
SmallVectorImpl<unsigned> &ShuffleMask);
// <0,2> or <0,1,4,5>
void DecodeMOVLHPSMask(unsigned NElts,
SmallVectorImpl<unsigned> &ShuffleMask);
void DecodePSHUFMask(unsigned NElts, unsigned Imm,
SmallVectorImpl<unsigned> &ShuffleMask);
void DecodePSHUFHWMask(unsigned Imm,
SmallVectorImpl<unsigned> &ShuffleMask);
void DecodePSHUFLWMask(unsigned Imm,
SmallVectorImpl<unsigned> &ShuffleMask);
void DecodeSHUFPMask(EVT VT, unsigned Imm,
SmallVectorImpl<unsigned> &ShuffleMask);
/// DecodeUNPCKHMask - This decodes the shuffle masks for unpckhps/unpckhpd
/// etc. VT indicates the type of the vector allowing it to handle different
/// datatypes and vector widths.
void DecodeUNPCKHMask(EVT VT, SmallVectorImpl<unsigned> &ShuffleMask);
/// DecodeUNPCKLMask - This decodes the shuffle masks for unpcklps/unpcklpd
/// etc. VT indicates the type of the vector allowing it to handle different
/// datatypes and vector widths.
void DecodeUNPCKLMask(EVT VT, SmallVectorImpl<unsigned> &ShuffleMask);
// DecodeVPERMILPMask - Decodes VPERMILPS/ VPERMILPD permutes for any 128-bit
// 32-bit or 64-bit elements. For 256-bit vectors, it's considered as two 128
// lanes. For VPERMILPS, referenced elements can't cross lanes and the mask of
// the first lane must be the same of the second.
void DecodeVPERMILPMask(EVT VT, unsigned Imm,
SmallVectorImpl<unsigned> &ShuffleMask);
void DecodeVPERM2F128Mask(unsigned Imm,
SmallVectorImpl<unsigned> &ShuffleMask);
void DecodeVPERM2F128Mask(EVT VT, unsigned Imm,
SmallVectorImpl<unsigned> &ShuffleMask);
} // llvm namespace
#endif
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