llvm/lib/MC/DXContainerPSVInfo.cpp

   1 //===- llvm/MC/DXContainerPSVInfo.cpp - DXContainer PSVInfo -----*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/MC/DXContainerPSVInfo.h"
  10 #include "llvm/BinaryFormat/DXContainer.h"
  11 #include "llvm/MC/StringTableBuilder.h"
  12 #include "llvm/Support/EndianStream.h"
  13 #include "llvm/Support/raw_ostream.h"
  14
  15 using namespace llvm;
  16 using namespace llvm::mcdxbc;
  17 using namespace llvm::dxbc::PSV;
  18
  19 static constexpr size_t npos = StringRef::npos;
  20
  21 static size_t FindSequence(ArrayRef<uint32_t> Buffer,
  22                            ArrayRef<uint32_t> Sequence) {
  23   if (Buffer.size() < Sequence.size())
  24     return npos;
  25   for (size_t Idx = 0; Idx <= Buffer.size() - Sequence.size(); ++Idx) {
  26     if (0 == memcmp(static_cast<const void *>(&Buffer[Idx]),
  27                     static_cast<const void *>(Sequence.begin()),
  28                     Sequence.size() * sizeof(uint32_t)))
  29       return Idx;
  30   }
  31   return npos;
  32 }
  33
  34 static void
  35 ProcessElementList(StringTableBuilder &StrTabBuilder,
  36                    SmallVectorImpl<uint32_t> &IndexBuffer,
  37                    SmallVectorImpl<v0::SignatureElement> &FinalElements,
  38                    SmallVectorImpl<StringRef> &SemanticNames,
  39                    ArrayRef<PSVSignatureElement> Elements) {
  40   for (const auto &El : Elements) {
  41     // Put the name in the string table and the name list.
  42     StrTabBuilder.add(El.Name);
  43     SemanticNames.push_back(El.Name);
  44
  45     v0::SignatureElement FinalElement;
  46     memset(&FinalElement, 0, sizeof(v0::SignatureElement));
  47     FinalElement.Rows = static_cast<uint8_t>(El.Indices.size());
  48     FinalElement.StartRow = El.StartRow;
  49     FinalElement.Cols = El.Cols;
  50     FinalElement.StartCol = El.StartCol;
  51     FinalElement.Allocated = El.Allocated;
  52     FinalElement.Kind = El.Kind;
  53     FinalElement.Type = El.Type;
  54     FinalElement.Mode = El.Mode;
  55     FinalElement.DynamicMask = El.DynamicMask;
  56     FinalElement.Stream = El.Stream;
  57
  58     size_t Idx = FindSequence(IndexBuffer, El.Indices);
  59     if (Idx == npos) {
  60       FinalElement.IndicesOffset = static_cast<uint32_t>(IndexBuffer.size());
  61       IndexBuffer.insert(IndexBuffer.end(), El.Indices.begin(),
  62                          El.Indices.end());
  63     } else
  64       FinalElement.IndicesOffset = static_cast<uint32_t>(Idx);
  65     FinalElements.push_back(FinalElement);
  66   }
  67 }
  68
  69 void PSVRuntimeInfo::write(raw_ostream &OS, uint32_t Version) const {
  70   assert(IsFinalized && "finalize must be called before write");
  71
  72   uint32_t InfoSize;
  73   uint32_t BindingSize;
  74   switch (Version) {
  75   case 0:
  76     InfoSize = sizeof(dxbc::PSV::v0::RuntimeInfo);
  77     BindingSize = sizeof(dxbc::PSV::v0::ResourceBindInfo);
  78     break;
  79   case 1:
  80     InfoSize = sizeof(dxbc::PSV::v1::RuntimeInfo);
  81     BindingSize = sizeof(dxbc::PSV::v0::ResourceBindInfo);
  82     break;
  83   case 2:
  84   default:
  85     InfoSize = sizeof(dxbc::PSV::v2::RuntimeInfo);
  86     BindingSize = sizeof(dxbc::PSV::v2::ResourceBindInfo);
  87   }
  88   // Write the size of the info.
  89
  90   support::endian::write(OS, InfoSize, llvm::endianness::little);
  91   // Write the info itself.
  92   OS.write(reinterpret_cast<const char *>(&BaseData), InfoSize);
  93
  94   uint32_t ResourceCount = static_cast<uint32_t>(Resources.size());
  95
  96   support::endian::write(OS, ResourceCount, llvm::endianness::little);
  97   if (ResourceCount > 0)
  98     support::endian::write(OS, BindingSize, llvm::endianness::little);
  99
 100   for (const auto &Res : Resources)
 101     OS.write(reinterpret_cast<const char *>(&Res), BindingSize);
 102
 103   // PSV Version 0 stops after the resource list.
 104   if (Version == 0)
 105     return;
 106
 107   StringTableBuilder StrTabBuilder((StringTableBuilder::DXContainer));
 108   SmallVector<uint32_t, 64> IndexBuffer;
 109   SmallVector<v0::SignatureElement, 32> SignatureElements;
 110   SmallVector<StringRef, 32> SemanticNames;
 111
 112   ProcessElementList(StrTabBuilder, IndexBuffer, SignatureElements,
 113                      SemanticNames, InputElements);
 114   ProcessElementList(StrTabBuilder, IndexBuffer, SignatureElements,
 115                      SemanticNames, OutputElements);
 116   ProcessElementList(StrTabBuilder, IndexBuffer, SignatureElements,
 117                      SemanticNames, PatchOrPrimElements);
 118
 119   StrTabBuilder.finalize();
 120   for (auto ElAndName : zip(SignatureElements, SemanticNames)) {
 121     v0::SignatureElement &El = std::get<0>(ElAndName);
 122     StringRef Name = std::get<1>(ElAndName);
 123     El.NameOffset = static_cast<uint32_t>(StrTabBuilder.getOffset(Name));
 124     if (sys::IsBigEndianHost)
 125       El.swapBytes();
 126   }
 127
 128   support::endian::write(OS, static_cast<uint32_t>(StrTabBuilder.getSize()),
 129                          llvm::endianness::little);
 130
 131   // Write the string table.
 132   StrTabBuilder.write(OS);
 133
 134   // Write the index table size, then table.
 135   support::endian::write(OS, static_cast<uint32_t>(IndexBuffer.size()),
 136                          llvm::endianness::little);
 137   for (auto I : IndexBuffer)
 138     support::endian::write(OS, I, llvm::endianness::little);
 139
 140   if (SignatureElements.size() > 0) {
 141     // write the size of the signature elements.
 142     support::endian::write(OS,
 143                            static_cast<uint32_t>(sizeof(v0::SignatureElement)),
 144                            llvm::endianness::little);
 145
 146     // write the signature elements.
 147     OS.write(reinterpret_cast<const char *>(&SignatureElements[0]),
 148              SignatureElements.size() * sizeof(v0::SignatureElement));
 149   }
 150
 151   for (const auto &MaskVector : OutputVectorMasks)
 152     support::endian::write_array(OS, ArrayRef<uint32_t>(MaskVector),
 153                                  llvm::endianness::little);
 154   support::endian::write_array(OS, ArrayRef<uint32_t>(PatchOrPrimMasks),
 155                                llvm::endianness::little);
 156   for (const auto &MaskVector : InputOutputMap)
 157     support::endian::write_array(OS, ArrayRef<uint32_t>(MaskVector),
 158                                  llvm::endianness::little);
 159   support::endian::write_array(OS, ArrayRef<uint32_t>(InputPatchMap),
 160                                llvm::endianness::little);
 161   support::endian::write_array(OS, ArrayRef<uint32_t>(PatchOutputMap),
 162                                llvm::endianness::little);
 163 }
 164
 165 void Signature::write(raw_ostream &OS) {
 166   SmallVector<dxbc::ProgramSignatureElement> SigParams;
 167   SigParams.reserve(Params.size());
 168   StringTableBuilder StrTabBuilder((StringTableBuilder::DWARF));
 169
 170   // Name offsets are from the start of the part. Pre-calculate the offset to
 171   // the start of the string table so that it can be added to the table offset.
 172   uint32_t TableStart = sizeof(dxbc::ProgramSignatureHeader) +
 173                         (sizeof(dxbc::ProgramSignatureElement) * Params.size());
 174
 175   for (const auto &P : Params) {
 176     // zero out the data
 177     dxbc::ProgramSignatureElement FinalElement;
 178     memset(&FinalElement, 0, sizeof(dxbc::ProgramSignatureElement));
 179     FinalElement.Stream = P.Stream;
 180     FinalElement.NameOffset =
 181         static_cast<uint32_t>(StrTabBuilder.add(P.Name)) + TableStart;
 182     FinalElement.Index = P.Index;
 183     FinalElement.SystemValue = P.SystemValue;
 184     FinalElement.CompType = P.CompType;
 185     FinalElement.Register = P.Register;
 186     FinalElement.Mask = P.Mask;
 187     FinalElement.ExclusiveMask = P.ExclusiveMask;
 188     FinalElement.MinPrecision = P.MinPrecision;
 189     SigParams.push_back(FinalElement);
 190   }
 191
 192   StrTabBuilder.finalizeInOrder();
 193   stable_sort(SigParams, [&](const dxbc::ProgramSignatureElement &L,
 194                              const dxbc::ProgramSignatureElement R) {
 195     return std::tie(L.Stream, L.Register, L.NameOffset) <
 196            std::tie(R.Stream, R.Register, R.NameOffset);
 197   });
 198   if (sys::IsBigEndianHost)
 199     for (auto &El : SigParams)
 200       El.swapBytes();
 201
 202   dxbc::ProgramSignatureHeader Header = {static_cast<uint32_t>(Params.size()),
 203                                          sizeof(dxbc::ProgramSignatureHeader)};
 204   if (sys::IsBigEndianHost)
 205     Header.swapBytes();
 206   OS.write(reinterpret_cast<const char *>(&Header),
 207            sizeof(dxbc::ProgramSignatureHeader));
 208   OS.write(reinterpret_cast<const char *>(SigParams.data()),
 209            sizeof(dxbc::ProgramSignatureElement) * SigParams.size());
 210   StrTabBuilder.write(OS);
 211 }