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📁 AsmParser
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📄 ImmutableGraph.h(15.15 KB)
📁 MCTargetDesc
📁 TargetInfo
📄 X86.h(7.41 KB)
📄 X86.td(68.44 KB)
📄 X86AsmPrinter.cpp(27.18 KB)
📄 X86AsmPrinter.h(5.96 KB)
📄 X86AvoidStoreForwardingBlocks.cpp(27.94 KB)
📄 X86AvoidTrailingCall.cpp(4.91 KB)
📄 X86CallFrameOptimization.cpp(23.07 KB)
📄 X86CallLowering.cpp(17.62 KB)
📄 X86CallLowering.h(1.74 KB)
📄 X86CallingConv.cpp(13.34 KB)
📄 X86CallingConv.h(1.09 KB)
📄 X86CallingConv.td(46.15 KB)
📄 X86CmovConversion.cpp(34.07 KB)
📄 X86CondBrFolding.cpp(18.4 KB)
📄 X86DiscriminateMemOps.cpp(7.11 KB)
📄 X86DomainReassignment.cpp(25.87 KB)
📄 X86EvexToVex.cpp(8.8 KB)
📄 X86ExpandPseudo.cpp(16.95 KB)
📄 X86FastISel.cpp(139.28 KB)
📄 X86FixupBWInsts.cpp(18.09 KB)
📄 X86FixupLEAs.cpp(24.44 KB)
📄 X86FixupSetCC.cpp(4.44 KB)
📄 X86FlagsCopyLowering.cpp(40.36 KB)
📄 X86FloatingPoint.cpp(62.66 KB)
📄 X86FrameLowering.cpp(138.71 KB)
📄 X86FrameLowering.h(11.64 KB)
📄 X86GenRegisterBankInfo.def(3.32 KB)
📄 X86ISelDAGToDAG.cpp(208.37 KB)
📄 X86ISelLowering.cpp(1.94 MB)
📄 X86ISelLowering.h(60.88 KB)
📄 X86IndirectBranchTracking.cpp(6.17 KB)
📄 X86IndirectThunks.cpp(9.78 KB)
📄 X86InsertPrefetch.cpp(9.64 KB)
📄 X86InsertWait.cpp(4.47 KB)
📄 X86Instr3DNow.td(5.24 KB)
📄 X86InstrAMX.td(5.6 KB)
📄 X86InstrAVX512.td(653.76 KB)
📄 X86InstrArithmetic.td(75.61 KB)
📄 X86InstrBuilder.h(8.45 KB)
📄 X86InstrCMovSetCC.td(5.76 KB)
📄 X86InstrCompiler.td(95.78 KB)
📄 X86InstrControl.td(20.53 KB)
📄 X86InstrExtension.td(11.64 KB)
📄 X86InstrFMA.td(33.23 KB)
📄 X86InstrFMA3Info.cpp(6.21 KB)
📄 X86InstrFMA3Info.h(3.25 KB)
📄 X86InstrFPStack.td(39.52 KB)
📄 X86InstrFoldTables.cpp(393.01 KB)
📄 X86InstrFoldTables.h(3.03 KB)
📄 X86InstrFormats.td(41.05 KB)
📄 X86InstrFragmentsSIMD.td(61.14 KB)
📄 X86InstrInfo.cpp(322.72 KB)
📄 X86InstrInfo.h(29.34 KB)
📄 X86InstrInfo.td(169.76 KB)
📄 X86InstrMMX.td(29.55 KB)
📄 X86InstrMPX.td(3.63 KB)
📄 X86InstrSGX.td(1.12 KB)
📄 X86InstrSSE.td(385.01 KB)
📄 X86InstrSVM.td(2.16 KB)
📄 X86InstrShiftRotate.td(49.56 KB)
📄 X86InstrSystem.td(34.03 KB)
📄 X86InstrTSX.td(2.1 KB)
📄 X86InstrVMX.td(3.53 KB)
📄 X86InstrVecCompiler.td(21.09 KB)
📄 X86InstrXOP.td(23.81 KB)
📄 X86InstructionSelector.cpp(61.11 KB)
📄 X86InterleavedAccess.cpp(32.7 KB)
📄 X86IntrinsicsInfo.h(73.96 KB)
📄 X86LegalizerInfo.cpp(15.6 KB)
📄 X86LegalizerInfo.h(1.65 KB)
📄 X86LoadValueInjectionLoadHardening.cpp(32.4 KB)
📄 X86LoadValueInjectionRetHardening.cpp(4.93 KB)
📄 X86MCInstLower.cpp(96.53 KB)
📄 X86MachineFunctionInfo.cpp(1.1 KB)
📄 X86MachineFunctionInfo.h(8.87 KB)
📄 X86MacroFusion.cpp(2.62 KB)
📄 X86MacroFusion.h(992 B)
📄 X86OptimizeLEAs.cpp(27.47 KB)
📄 X86PadShortFunction.cpp(7.33 KB)
📄 X86PartialReduction.cpp(15.46 KB)
📄 X86PfmCounters.td(10.18 KB)
📄 X86RegisterBankInfo.cpp(10.55 KB)
📄 X86RegisterBankInfo.h(2.87 KB)
📄 X86RegisterBanks.td(629 B)
📄 X86RegisterInfo.cpp(29 KB)
📄 X86RegisterInfo.h(5.61 KB)
📄 X86RegisterInfo.td(26.07 KB)
📄 X86SchedBroadwell.td(69.45 KB)
📄 X86SchedHaswell.td(73.96 KB)
📄 X86SchedPredicates.td(4.23 KB)
📄 X86SchedSandyBridge.td(50 KB)
📄 X86SchedSkylakeClient.td(74.65 KB)
📄 X86SchedSkylakeServer.td(113.85 KB)
📄 X86Schedule.td(36.9 KB)
📄 X86ScheduleAtom.td(38.26 KB)
📄 X86ScheduleBdVer2.td(56.78 KB)
📄 X86ScheduleBtVer2.td(46.98 KB)
📄 X86ScheduleSLM.td(22.91 KB)
📄 X86ScheduleZnver1.td(48.97 KB)
📄 X86ScheduleZnver2.td(48.12 KB)
📄 X86SelectionDAGInfo.cpp(12.02 KB)
📄 X86SelectionDAGInfo.h(1.8 KB)
📄 X86ShuffleDecodeConstantPool.cpp(11.22 KB)
📄 X86ShuffleDecodeConstantPool.h(2.13 KB)
📄 X86SpeculativeExecutionSideEffectSuppression.cpp(6.97 KB)
📄 X86SpeculativeLoadHardening.cpp(93.16 KB)
📄 X86Subtarget.cpp(13.25 KB)
📄 X86Subtarget.h(32.08 KB)
📄 X86TargetMachine.cpp(18.88 KB)
📄 X86TargetMachine.h(2.04 KB)
📄 X86TargetObjectFile.cpp(2.61 KB)
📄 X86TargetObjectFile.h(2.13 KB)
📄 X86TargetTransformInfo.cpp(189.14 KB)
📄 X86TargetTransformInfo.h(9.63 KB)
📄 X86VZeroUpper.cpp(12.59 KB)
📄 X86WinAllocaExpander.cpp(9.54 KB)
📄 X86WinEHState.cpp(28.97 KB)

Editing: X86InstrFMA3Info.cpp

//===-- X86InstrFMA3Info.cpp - X86 FMA3 Instruction Information -----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains the implementation of the classes providing information
// about existing X86 FMA3 opcodes, classifying and grouping them.
//
//===----------------------------------------------------------------------===//

#include "X86InstrFMA3Info.h"
#include "X86InstrInfo.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/Threading.h"
#include <cassert>
#include <cstdint>

using namespace llvm;

#define FMA3GROUP(Name, Suf, Attrs) \
  { { X86::Name##132##Suf, X86::Name##213##Suf, X86::Name##231##Suf }, Attrs },

#define FMA3GROUP_MASKED(Name, Suf, Attrs) \
  FMA3GROUP(Name, Suf, Attrs) \
  FMA3GROUP(Name, Suf##k, Attrs | X86InstrFMA3Group::KMergeMasked) \
  FMA3GROUP(Name, Suf##kz, Attrs | X86InstrFMA3Group::KZeroMasked)

#define FMA3GROUP_PACKED_WIDTHS(Name, Suf, Attrs) \
  FMA3GROUP(Name, Suf##Ym, Attrs) \
  FMA3GROUP(Name, Suf##Yr, Attrs) \
  FMA3GROUP_MASKED(Name, Suf##Z128m, Attrs) \
  FMA3GROUP_MASKED(Name, Suf##Z128r, Attrs) \
  FMA3GROUP_MASKED(Name, Suf##Z256m, Attrs) \
  FMA3GROUP_MASKED(Name, Suf##Z256r, Attrs) \
  FMA3GROUP_MASKED(Name, Suf##Zm, Attrs) \
  FMA3GROUP_MASKED(Name, Suf##Zr, Attrs) \
  FMA3GROUP(Name, Suf##m, Attrs) \
  FMA3GROUP(Name, Suf##r, Attrs)

#define FMA3GROUP_PACKED(Name, Attrs) \
  FMA3GROUP_PACKED_WIDTHS(Name, PD, Attrs) \
  FMA3GROUP_PACKED_WIDTHS(Name, PS, Attrs)

#define FMA3GROUP_SCALAR_WIDTHS(Name, Suf, Attrs) \
  FMA3GROUP(Name, Suf##Zm, Attrs) \
  FMA3GROUP_MASKED(Name, Suf##Zm_Int, Attrs | X86InstrFMA3Group::Intrinsic) \
  FMA3GROUP(Name, Suf##Zr, Attrs) \
  FMA3GROUP_MASKED(Name, Suf##Zr_Int, Attrs | X86InstrFMA3Group::Intrinsic) \
  FMA3GROUP(Name, Suf##m, Attrs) \
  FMA3GROUP(Name, Suf##m_Int, Attrs | X86InstrFMA3Group::Intrinsic) \
  FMA3GROUP(Name, Suf##r, Attrs) \
  FMA3GROUP(Name, Suf##r_Int, Attrs | X86InstrFMA3Group::Intrinsic)

#define FMA3GROUP_SCALAR(Name, Attrs) \
  FMA3GROUP_SCALAR_WIDTHS(Name, SD, Attrs) \
  FMA3GROUP_SCALAR_WIDTHS(Name, SS, Attrs)

#define FMA3GROUP_FULL(Name, Attrs) \
  FMA3GROUP_PACKED(Name, Attrs) \
  FMA3GROUP_SCALAR(Name, Attrs)

static const X86InstrFMA3Group Groups[] = {
  FMA3GROUP_FULL(VFMADD, 0)
  FMA3GROUP_PACKED(VFMADDSUB, 0)
  FMA3GROUP_FULL(VFMSUB, 0)
  FMA3GROUP_PACKED(VFMSUBADD, 0)
  FMA3GROUP_FULL(VFNMADD, 0)
  FMA3GROUP_FULL(VFNMSUB, 0)
};

#define FMA3GROUP_PACKED_AVX512_WIDTHS(Name, Type, Suf, Attrs) \
  FMA3GROUP_MASKED(Name, Type##Z128##Suf, Attrs) \
  FMA3GROUP_MASKED(Name, Type##Z256##Suf, Attrs) \
  FMA3GROUP_MASKED(Name, Type##Z##Suf, Attrs)

#define FMA3GROUP_PACKED_AVX512(Name, Suf, Attrs) \
  FMA3GROUP_PACKED_AVX512_WIDTHS(Name, PD, Suf, Attrs) \
  FMA3GROUP_PACKED_AVX512_WIDTHS(Name, PS, Suf, Attrs)

#define FMA3GROUP_PACKED_AVX512_ROUND(Name, Suf, Attrs) \
  FMA3GROUP_MASKED(Name, PDZ##Suf, Attrs) \
  FMA3GROUP_MASKED(Name, PSZ##Suf, Attrs)

#define FMA3GROUP_SCALAR_AVX512_ROUND(Name, Suf, Attrs) \
  FMA3GROUP(Name, SDZ##Suf, Attrs) \
  FMA3GROUP_MASKED(Name, SDZ##Suf##_Int, Attrs) \
  FMA3GROUP(Name, SSZ##Suf, Attrs) \
  FMA3GROUP_MASKED(Name, SSZ##Suf##_Int, Attrs)

static const X86InstrFMA3Group BroadcastGroups[] = {
  FMA3GROUP_PACKED_AVX512(VFMADD, mb, 0)
  FMA3GROUP_PACKED_AVX512(VFMADDSUB, mb, 0)
  FMA3GROUP_PACKED_AVX512(VFMSUB, mb, 0)
  FMA3GROUP_PACKED_AVX512(VFMSUBADD, mb, 0)
  FMA3GROUP_PACKED_AVX512(VFNMADD, mb, 0)
  FMA3GROUP_PACKED_AVX512(VFNMSUB, mb, 0)
};

static const X86InstrFMA3Group RoundGroups[] = {
  FMA3GROUP_PACKED_AVX512_ROUND(VFMADD, rb, 0)
  FMA3GROUP_SCALAR_AVX512_ROUND(VFMADD, rb, X86InstrFMA3Group::Intrinsic)
  FMA3GROUP_PACKED_AVX512_ROUND(VFMADDSUB, rb, 0)
  FMA3GROUP_PACKED_AVX512_ROUND(VFMSUB, rb, 0)
  FMA3GROUP_SCALAR_AVX512_ROUND(VFMSUB, rb, X86InstrFMA3Group::Intrinsic)
  FMA3GROUP_PACKED_AVX512_ROUND(VFMSUBADD, rb, 0)
  FMA3GROUP_PACKED_AVX512_ROUND(VFNMADD, rb, 0)
  FMA3GROUP_SCALAR_AVX512_ROUND(VFNMADD, rb, X86InstrFMA3Group::Intrinsic)
  FMA3GROUP_PACKED_AVX512_ROUND(VFNMSUB, rb, 0)
  FMA3GROUP_SCALAR_AVX512_ROUND(VFNMSUB, rb, X86InstrFMA3Group::Intrinsic)
};

static void verifyTables() {
#ifndef NDEBUG
  static std::atomic<bool> TableChecked(false);
  if (!TableChecked.load(std::memory_order_relaxed)) {
    assert(llvm::is_sorted(Groups) && llvm::is_sorted(RoundGroups) &&
           llvm::is_sorted(BroadcastGroups) && "FMA3 tables not sorted!");
    TableChecked.store(true, std::memory_order_relaxed);
  }
#endif
}

/// Returns a reference to a group of FMA3 opcodes to where the given
/// \p Opcode is included. If the given \p Opcode is not recognized as FMA3
/// and not included into any FMA3 group, then nullptr is returned.
const X86InstrFMA3Group *llvm::getFMA3Group(unsigned Opcode, uint64_t TSFlags) {

// FMA3 instructions have a well defined encoding pattern we can exploit.
  uint8_t BaseOpcode = X86II::getBaseOpcodeFor(TSFlags);
  bool IsFMA3 = ((TSFlags & X86II::EncodingMask) == X86II::VEX ||
                 (TSFlags & X86II::EncodingMask) == X86II::EVEX) &&
                (TSFlags & X86II::OpMapMask) == X86II::T8 &&
                (TSFlags & X86II::OpPrefixMask) == X86II::PD &&
                ((BaseOpcode >= 0x96 && BaseOpcode <= 0x9F) ||
                 (BaseOpcode >= 0xA6 && BaseOpcode <= 0xAF) ||
                 (BaseOpcode >= 0xB6 && BaseOpcode <= 0xBF));
  if (!IsFMA3)
    return nullptr;

verifyTables();

ArrayRef<X86InstrFMA3Group> Table;
  if (TSFlags & X86II::EVEX_RC)
    Table = makeArrayRef(RoundGroups);
  else if (TSFlags & X86II::EVEX_B)
    Table = makeArrayRef(BroadcastGroups);
  else
    Table = makeArrayRef(Groups);

// FMA 132 instructions have an opcode of 0x96-0x9F
  // FMA 213 instructions have an opcode of 0xA6-0xAF
  // FMA 231 instructions have an opcode of 0xB6-0xBF
  unsigned FormIndex = ((BaseOpcode - 0x90) >> 4) & 0x3;

auto I = partition_point(Table, [=](const X86InstrFMA3Group &Group) {
    return Group.Opcodes[FormIndex] < Opcode;
  });
  assert(I != Table.end() && I->Opcodes[FormIndex] == Opcode &&
         "Couldn't find FMA3 opcode!");
  return I;
}

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Editing: X86InstrFMA3Info.cpp

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