forked from OSchip/llvm-project
Move x86 specific shuffle mask decoding to its own header, it's also going to be used elsewhere. Also trim trailing whitespaces
llvm-svn: 112846
This commit is contained in:
Bruno Cardoso Lopes
parent
35f3252036
commit
c79f50170a
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@ -16,137 +16,13 @@
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#include "X86GenInstrNames.inc"
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#include "llvm/MC/MCInst.h"
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#include "llvm/Support/raw_ostream.h"
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#include "../X86ShuffleDecode.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// Vector Mask Decoding
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//===----------------------------------------------------------------------===//
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enum {
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SM_SentinelZero = ~0U
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};
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static void DecodeINSERTPSMask(unsigned Imm,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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// Defaults the copying the dest value.
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ShuffleMask.push_back(0);
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ShuffleMask.push_back(1);
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ShuffleMask.push_back(2);
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ShuffleMask.push_back(3);
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// Decode the immediate.
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unsigned ZMask = Imm & 15;
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unsigned CountD = (Imm >> 4) & 3;
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unsigned CountS = (Imm >> 6) & 3;
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// CountS selects which input element to use.
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unsigned InVal = 4+CountS;
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// CountD specifies which element of destination to update.
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ShuffleMask[CountD] = InVal;
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// ZMask zaps values, potentially overriding the CountD elt.
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if (ZMask & 1) ShuffleMask[0] = SM_SentinelZero;
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if (ZMask & 2) ShuffleMask[1] = SM_SentinelZero;
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if (ZMask & 4) ShuffleMask[2] = SM_SentinelZero;
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if (ZMask & 8) ShuffleMask[3] = SM_SentinelZero;
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}
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static void DecodeMOVHLPSMask(SmallVectorImpl<unsigned> &ShuffleMask) {
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ShuffleMask.push_back(3);
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ShuffleMask.push_back(1);
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}
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static void DecodeMOVLHPSMask(SmallVectorImpl<unsigned> &ShuffleMask) {
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ShuffleMask.push_back(0);
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ShuffleMask.push_back(2);
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}
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static void DecodePSHUFMask(unsigned NElts, unsigned Imm,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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for (unsigned i = 0; i != NElts; ++i) {
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ShuffleMask.push_back(Imm % NElts);
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Imm /= NElts;
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}
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}
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static void DecodePSHUFHWMask(unsigned Imm,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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ShuffleMask.push_back(0);
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ShuffleMask.push_back(1);
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ShuffleMask.push_back(2);
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ShuffleMask.push_back(3);
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for (unsigned i = 0; i != 4; ++i) {
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ShuffleMask.push_back(4+(Imm & 3));
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Imm >>= 2;
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}
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}
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static void DecodePSHUFLWMask(unsigned Imm,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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for (unsigned i = 0; i != 4; ++i) {
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ShuffleMask.push_back((Imm & 3));
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Imm >>= 2;
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}
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ShuffleMask.push_back(4);
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ShuffleMask.push_back(5);
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ShuffleMask.push_back(6);
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ShuffleMask.push_back(7);
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}
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static void DecodePUNPCKLMask(unsigned NElts,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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for (unsigned i = 0; i != NElts/2; ++i) {
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ShuffleMask.push_back(i);
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ShuffleMask.push_back(i+NElts);
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}
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}
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static void DecodePUNPCKHMask(unsigned NElts,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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for (unsigned i = 0; i != NElts/2; ++i) {
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ShuffleMask.push_back(i+NElts/2);
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ShuffleMask.push_back(i+NElts+NElts/2);
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}
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}
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static void DecodeSHUFPSMask(unsigned NElts, unsigned Imm,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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// Part that reads from dest.
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for (unsigned i = 0; i != NElts/2; ++i) {
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ShuffleMask.push_back(Imm % NElts);
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Imm /= NElts;
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}
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// Part that reads from src.
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for (unsigned i = 0; i != NElts/2; ++i) {
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ShuffleMask.push_back(Imm % NElts + NElts);
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Imm /= NElts;
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}
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}
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static void DecodeUNPCKHPMask(unsigned NElts,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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for (unsigned i = 0; i != NElts/2; ++i) {
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ShuffleMask.push_back(i+NElts/2); // Reads from dest
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ShuffleMask.push_back(i+NElts+NElts/2); // Reads from src
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}
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}
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/// DecodeUNPCKLPMask - This decodes the shuffle masks for unpcklps/unpcklpd
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/// etc. NElts indicates the number of elements in the vector allowing it to
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/// handle different datatypes and vector widths.
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static void DecodeUNPCKLPMask(unsigned NElts,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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for (unsigned i = 0; i != NElts/2; ++i) {
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ShuffleMask.push_back(i); // Reads from dest
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ShuffleMask.push_back(i+NElts); // Reads from src
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}
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}
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//===----------------------------------------------------------------------===//
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// Top Level Entrypoint
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//===----------------------------------------------------------------------===//
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/// EmitAnyX86InstComments - This function decodes x86 instructions and prints
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/// newline terminated strings to the specified string if desired. This
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/// information is shown in disassembly dumps when verbose assembly is enabled.
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@ -0,0 +1,145 @@
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//===-- X86ShuffleDecode.h - X86 shuffle decode logic ---------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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 X86_SHUFFLE_DECODE_H
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#define X86_SHUFFLE_DECODE_H
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#include "llvm/ADT/SmallVector.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// Vector Mask Decoding
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//===----------------------------------------------------------------------===//
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enum {
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SM_SentinelZero = ~0U
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};
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static void DecodeINSERTPSMask(unsigned Imm,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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// Defaults the copying the dest value.
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ShuffleMask.push_back(0);
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ShuffleMask.push_back(1);
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ShuffleMask.push_back(2);
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ShuffleMask.push_back(3);
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// Decode the immediate.
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unsigned ZMask = Imm & 15;
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unsigned CountD = (Imm >> 4) & 3;
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unsigned CountS = (Imm >> 6) & 3;
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// CountS selects which input element to use.
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unsigned InVal = 4+CountS;
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// CountD specifies which element of destination to update.
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ShuffleMask[CountD] = InVal;
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// ZMask zaps values, potentially overriding the CountD elt.
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if (ZMask & 1) ShuffleMask[0] = SM_SentinelZero;
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if (ZMask & 2) ShuffleMask[1] = SM_SentinelZero;
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if (ZMask & 4) ShuffleMask[2] = SM_SentinelZero;
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if (ZMask & 8) ShuffleMask[3] = SM_SentinelZero;
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}
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static void DecodeMOVHLPSMask(SmallVectorImpl<unsigned> &ShuffleMask) {
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ShuffleMask.push_back(3);
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ShuffleMask.push_back(1);
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}
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static void DecodeMOVLHPSMask(SmallVectorImpl<unsigned> &ShuffleMask) {
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ShuffleMask.push_back(0);
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ShuffleMask.push_back(2);
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}
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static void DecodePSHUFMask(unsigned NElts, unsigned Imm,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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for (unsigned i = 0; i != NElts; ++i) {
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ShuffleMask.push_back(Imm % NElts);
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Imm /= NElts;
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}
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}
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static void DecodePSHUFHWMask(unsigned Imm,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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ShuffleMask.push_back(0);
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ShuffleMask.push_back(1);
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ShuffleMask.push_back(2);
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ShuffleMask.push_back(3);
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for (unsigned i = 0; i != 4; ++i) {
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ShuffleMask.push_back(4+(Imm & 3));
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Imm >>= 2;
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}
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}
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static void DecodePSHUFLWMask(unsigned Imm,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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for (unsigned i = 0; i != 4; ++i) {
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ShuffleMask.push_back((Imm & 3));
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Imm >>= 2;
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}
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ShuffleMask.push_back(4);
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ShuffleMask.push_back(5);
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ShuffleMask.push_back(6);
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ShuffleMask.push_back(7);
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}
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static void DecodePUNPCKLMask(unsigned NElts,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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for (unsigned i = 0; i != NElts/2; ++i) {
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ShuffleMask.push_back(i);
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ShuffleMask.push_back(i+NElts);
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}
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}
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static void DecodePUNPCKHMask(unsigned NElts,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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for (unsigned i = 0; i != NElts/2; ++i) {
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ShuffleMask.push_back(i+NElts/2);
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ShuffleMask.push_back(i+NElts+NElts/2);
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}
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}
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static void DecodeSHUFPSMask(unsigned NElts, unsigned Imm,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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// Part that reads from dest.
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for (unsigned i = 0; i != NElts/2; ++i) {
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ShuffleMask.push_back(Imm % NElts);
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Imm /= NElts;
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}
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// Part that reads from src.
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for (unsigned i = 0; i != NElts/2; ++i) {
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ShuffleMask.push_back(Imm % NElts + NElts);
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Imm /= NElts;
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}
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}
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static void DecodeUNPCKHPMask(unsigned NElts,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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for (unsigned i = 0; i != NElts/2; ++i) {
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ShuffleMask.push_back(i+NElts/2); // Reads from dest
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ShuffleMask.push_back(i+NElts+NElts/2); // Reads from src
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}
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}
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/// DecodeUNPCKLPMask - This decodes the shuffle masks for unpcklps/unpcklpd
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/// etc. NElts indicates the number of elements in the vector allowing it to
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/// handle different datatypes and vector widths.
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static void DecodeUNPCKLPMask(unsigned NElts,
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SmallVectorImpl<unsigned> &ShuffleMask) {
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for (unsigned i = 0; i != NElts/2; ++i) {
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ShuffleMask.push_back(i); // Reads from dest
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ShuffleMask.push_back(i+NElts); // Reads from src
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}
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}
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#endif
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