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
FindSequence(ArrayRef<uint32_t> Buffer,ArrayRef<uint32_t> Sequence)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
ProcessElementList(StringTableBuilder & StrTabBuilder,SmallVectorImpl<uint32_t> & IndexBuffer,SmallVectorImpl<v0::SignatureElement> & FinalElements,SmallVectorImpl<StringRef> & SemanticNames,ArrayRef<PSVSignatureElement> Elements)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
write(raw_ostream & OS,uint32_t Version) const69 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 InfoSize = sizeof(dxbc::PSV::v2::RuntimeInfo);
85 BindingSize = sizeof(dxbc::PSV::v2::ResourceBindInfo);
86 break;
87 case 3:
88 default:
89 InfoSize = sizeof(dxbc::PSV::v3::RuntimeInfo);
90 BindingSize = sizeof(dxbc::PSV::v2::ResourceBindInfo);
91 }
92
93 // Write the size of the info.
94 support::endian::write(OS, InfoSize, llvm::endianness::little);
95
96 // Write the info itself.
97 OS.write(reinterpret_cast<const char *>(&BaseData), InfoSize);
98
99 uint32_t ResourceCount = static_cast<uint32_t>(Resources.size());
100
101 support::endian::write(OS, ResourceCount, llvm::endianness::little);
102 if (ResourceCount > 0)
103 support::endian::write(OS, BindingSize, llvm::endianness::little);
104
105 for (const auto &Res : Resources)
106 OS.write(reinterpret_cast<const char *>(&Res), BindingSize);
107
108 // PSV Version 0 stops after the resource list.
109 if (Version == 0)
110 return;
111
112 support::endian::write(OS,
113 static_cast<uint32_t>(DXConStrTabBuilder.getSize()),
114 llvm::endianness::little);
115
116 // Write the string table.
117 DXConStrTabBuilder.write(OS);
118
119 // Write the index table size, then table.
120 support::endian::write(OS, static_cast<uint32_t>(IndexBuffer.size()),
121 llvm::endianness::little);
122 for (auto I : IndexBuffer)
123 support::endian::write(OS, I, llvm::endianness::little);
124
125 if (SignatureElements.size() > 0) {
126 // write the size of the signature elements.
127 support::endian::write(OS,
128 static_cast<uint32_t>(sizeof(v0::SignatureElement)),
129 llvm::endianness::little);
130
131 // write the signature elements.
132 OS.write(reinterpret_cast<const char *>(&SignatureElements[0]),
133 SignatureElements.size() * sizeof(v0::SignatureElement));
134 }
135
136 for (const auto &MaskVector : OutputVectorMasks)
137 support::endian::write_array(OS, ArrayRef<uint32_t>(MaskVector),
138 llvm::endianness::little);
139 support::endian::write_array(OS, ArrayRef<uint32_t>(PatchOrPrimMasks),
140 llvm::endianness::little);
141 for (const auto &MaskVector : InputOutputMap)
142 support::endian::write_array(OS, ArrayRef<uint32_t>(MaskVector),
143 llvm::endianness::little);
144 support::endian::write_array(OS, ArrayRef<uint32_t>(InputPatchMap),
145 llvm::endianness::little);
146 support::endian::write_array(OS, ArrayRef<uint32_t>(PatchOutputMap),
147 llvm::endianness::little);
148 }
149
finalize(Triple::EnvironmentType Stage)150 void PSVRuntimeInfo::finalize(Triple::EnvironmentType Stage) {
151 IsFinalized = true;
152 BaseData.SigInputElements = static_cast<uint32_t>(InputElements.size());
153 BaseData.SigOutputElements = static_cast<uint32_t>(OutputElements.size());
154 BaseData.SigPatchOrPrimElements =
155 static_cast<uint32_t>(PatchOrPrimElements.size());
156
157 SmallVector<StringRef, 32> SemanticNames;
158
159 // Build a string table and set associated offsets to be written when
160 // write() is called
161 ProcessElementList(DXConStrTabBuilder, IndexBuffer, SignatureElements,
162 SemanticNames, InputElements);
163 ProcessElementList(DXConStrTabBuilder, IndexBuffer, SignatureElements,
164 SemanticNames, OutputElements);
165 ProcessElementList(DXConStrTabBuilder, IndexBuffer, SignatureElements,
166 SemanticNames, PatchOrPrimElements);
167
168 DXConStrTabBuilder.add(EntryName);
169
170 DXConStrTabBuilder.finalize();
171 for (auto ElAndName : zip(SignatureElements, SemanticNames)) {
172 llvm::dxbc::PSV::v0::SignatureElement &El = std::get<0>(ElAndName);
173 StringRef Name = std::get<1>(ElAndName);
174 El.NameOffset = static_cast<uint32_t>(DXConStrTabBuilder.getOffset(Name));
175 if (sys::IsBigEndianHost)
176 El.swapBytes();
177 }
178
179 BaseData.EntryNameOffset =
180 static_cast<uint32_t>(DXConStrTabBuilder.getOffset(EntryName));
181
182 if (!sys::IsBigEndianHost)
183 return;
184 BaseData.swapBytes();
185 BaseData.swapBytes(Stage);
186 for (auto &Res : Resources)
187 Res.swapBytes();
188 }
189
write(raw_ostream & OS)190 void Signature::write(raw_ostream &OS) {
191 SmallVector<dxbc::ProgramSignatureElement> SigParams;
192 SigParams.reserve(Params.size());
193 StringTableBuilder StrTabBuilder((StringTableBuilder::DWARF));
194
195 // Name offsets are from the start of the part. Pre-calculate the offset to
196 // the start of the string table so that it can be added to the table offset.
197 uint32_t TableStart = sizeof(dxbc::ProgramSignatureHeader) +
198 (sizeof(dxbc::ProgramSignatureElement) * Params.size());
199
200 for (const auto &P : Params) {
201 // zero out the data
202 dxbc::ProgramSignatureElement FinalElement;
203 memset(&FinalElement, 0, sizeof(dxbc::ProgramSignatureElement));
204 FinalElement.Stream = P.Stream;
205 FinalElement.NameOffset =
206 static_cast<uint32_t>(StrTabBuilder.add(P.Name)) + TableStart;
207 FinalElement.Index = P.Index;
208 FinalElement.SystemValue = P.SystemValue;
209 FinalElement.CompType = P.CompType;
210 FinalElement.Register = P.Register;
211 FinalElement.Mask = P.Mask;
212 FinalElement.ExclusiveMask = P.ExclusiveMask;
213 FinalElement.MinPrecision = P.MinPrecision;
214 SigParams.push_back(FinalElement);
215 }
216
217 StrTabBuilder.finalizeInOrder();
218 stable_sort(SigParams, [&](const dxbc::ProgramSignatureElement &L,
219 const dxbc::ProgramSignatureElement R) {
220 return std::tie(L.Stream, L.Register, L.NameOffset) <
221 std::tie(R.Stream, R.Register, R.NameOffset);
222 });
223 if (sys::IsBigEndianHost)
224 for (auto &El : SigParams)
225 El.swapBytes();
226
227 dxbc::ProgramSignatureHeader Header = {static_cast<uint32_t>(Params.size()),
228 sizeof(dxbc::ProgramSignatureHeader)};
229 if (sys::IsBigEndianHost)
230 Header.swapBytes();
231 OS.write(reinterpret_cast<const char *>(&Header),
232 sizeof(dxbc::ProgramSignatureHeader));
233 OS.write(reinterpret_cast<const char *>(SigParams.data()),
234 sizeof(dxbc::ProgramSignatureElement) * SigParams.size());
235 StrTabBuilder.write(OS);
236 }
237