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8 The SPIR-V Tools project provides an API and commands for processing SPIR-V
11 The project includes an assembler, binary module parser, disassembler, and
12 validator for SPIR-V, all based on a common static library. The library contains
13 all of the implementation details, and is used in the standalone tools whilst
14 also enabling integration into other code bases directly.
16 The interfaces are still under development, and are expected to change.
18 SPIR-V is defined by the Khronos Group Inc.
19 See the [SPIR-V Registry][spirv-registry] for the SPIR-V specification,
20 headers, and XML registry.
22 ## Verisoning SPIRV-Tools
24 See [`CHANGES`](CHANGES) for a high level summary of recent changes, by version.
26 SPIRV-Tools project version numbers are of the form `v`*year*`.`*index* and with
27 an optional `-dev` suffix to indicate work in progress. For exampe, the
28 following versions are ordered from oldest to newest:
36 Use the `--version` option on each command line tool to see the software
37 version. An API call reports the software version as a C-style string.
41 ### Assembler, binary parser, and disassembler
43 * Based on SPIR-V version 1.1 Rev 1
44 * Support for extended instruction sets:
45 * GLSL std450 version 1.0 Rev 3
46 * OpenCL version 1.0 Rev 2
47 * Support for SPIR-V 1.0 (with or without additional restrictions from Vulkan 1.0)
48 * Assembler only does basic syntax checking. No cross validation of
49 IDs or types is performed, except to check literal arguments to
50 `OpConstant`, `OpSpecConstant`, and `OpSwitch`.
52 See [`syntax.md`](syntax.md) for the assembly language syntax.
56 *Warning:* The validator is incomplete.
60 The SPIR-V Tools are maintained by members of the The Khronos Group Inc.,
61 at https://github.com/KhronosGroup/SPIRV-Tools.
63 Contributions via merge request are welcome. Changes should:
64 * Be provided under the [Khronos license](#license).
65 * Include tests to cover updated functionality.
66 * C++ code should follow the [Google C++ Style Guide][cpp-style-guide].
67 * Code should be formatted with `clang-format`. Settings are defined by
68 the included [.clang-format](.clang-format) file.
70 We intend to maintain a linear history on the GitHub `master` branch.
72 ### Source code organization
74 * `external/googletest`: Intended location for the
75 [googletest][googletest] sources, not provided
76 * `include/`: API clients should add this directory to the include search path
77 * `external/spirv-headers`: Intended location for
78 [SPIR-V headers][spirv-headers], not provided
79 * `include/spirv-tools/libspirv.h`: C API public interface
80 * `source/`: API implementation
81 * `test/`: Tests, using the [googletest][googletest] framework
82 * `tools/`: Command line executables
86 The project contains a number of tests, used to drive development
87 and ensure correctness. The tests are written using the
88 [googletest][googletest] framework. The `googletest`
89 source is not provided with this project. There are two ways to enable
91 * If SPIR-V Tools is configured as part of an enclosing project, then the
92 enclosing project should configure `googletest` before configuring SPIR-V Tools.
93 * If SPIR-V Tools is configured as a standalone project, then download the
94 `googletest` source into the `<spirv-dir>/external/googletest` directory before
95 configuring and building the project.
97 *Note*: You must use a version of googletest that includes
98 [a fix][googletest-pull-612] for [googletest issue 610][googletest-issue-610].
99 The fix is included on the googletest master branch any time after 2015-11-10.
100 In particular, googletest must be newer than version 1.7.0.
104 The project uses [CMake][cmake] to generate platform-specific build
105 configurations. After checking out [SPIR-V headers][spirv-headers] and
106 [googletest][googletest] into `external/`. issue the following commands:
109 mkdir <spirv-dir>/build
111 cmake [-G <platform-generator>] <spirv-dir>
114 Once the build files have been generated, build using your preferred
115 development environment.
119 The following CMake options are supported:
121 * `SPIRV_COLOR_TERMINAL={ON|OFF}`, default `ON` - Enables color console output.
122 * `SPIRV_SKIP_EXECUTABLES={ON|OFF}`, default `OFF`- Build only the library, not
123 the command line tools. This will also prevent the tests from being built.
124 * `SPIRV_USE_SANITIZER=<sanitizer>`, default is no sanitizing - On UNIX
125 platforms with an appropriate version of `clang` this option enables the use
126 of the sanitizers documented [here][clang-sanitizers].
127 This should only be used with a debug build.
128 * `SPIRV_WARN_EVERYTHING={ON|OFF}`, default `OFF` - On UNIX platforms enable
129 more strict warnings. The code might not compile with this option enabled.
130 For Clang, enables `-Weverything`. For GCC, enables `-Wpedantic`.
131 See [`CMakeLists.txt`](CMakeLists.txt) for details.
132 * `SPIRV_WERROR={ON|OFF}`, default `ON` - Forces a compilation error on any
133 warnings encountered by enabling the compiler-specific compiler front-end
140 The library provides a C API, but the internals use C++11.
142 In order to use the library from an application, the include path should point
143 to `<spirv-dir>/include`, which will enable the application to include the
144 header `<spirv-dir>/include/libspirv/libspirv.h` then linking against the
145 static library in `<spirv-build-dir>/libSPIRV-Tools.a` or
146 `<spirv-build-dir>/SPIRV-Tools.lib`.
148 * `SPIRV-Tools` CMake target: Creates the static library:
149 * `<spirv-build-dir>/libSPIRV-Tools.a` on Linux and OS X.
150 * `<spirv-build-dir>/libSPIRV-Tools.lib` on Windows.
154 The interfaces are still under development, and are expected to change.
156 There are three main entry points into the library.
158 * `spvTextToBinary`: An assembler, translating text to a binary SPIR-V module.
159 * `spvBinaryToText`: A disassembler, translating a binary SPIR-V module to
161 * `spvBinaryParse`: The entry point to a binary parser API. It issues callbacks
162 for the header and each parsed instruction. The disassembler is implemented
163 as a client of `spvBinaryParse`.
164 * `spvValidate` implements the validator functionality. *Incomplete*
166 ## Command line tools
168 Command line tools, which wrap the above library functions, are provided to
169 assemble or disassemble shader files. It's a convention to name SPIR-V
170 assembly and binary files with suffix `.spvasm` and `.spv`, respectively.
174 The assembler reads the assembly language text, and emits the binary form.
176 The standalone assembler is the exectuable called `spirv-as`, and is located in
177 `<spirv-build-dir>/spirv-as`. The functionality of the assembler is implemented
178 by the `spvTextToBinary` library function.
180 * `spirv-as` - the standalone assembler
181 * `<spirv-dir>/spirv-as`
183 Use option `-h` to print help.
185 ### Disassembler tool
187 The disassembler reads the binary form, and emits assembly language text.
189 The standalone disassembler is the executable called `spirv-dis`, and is located in
190 `<spirv-build-dir>/spirv-dis`. The functionality of the disassembler is implemented
191 by the `spvBinaryToText` library function.
193 * `spirv-dis` - the standalone disassembler
194 * `<spirv-dir>/spirv-dis`
196 Use option `-h` to print help.
198 The output includes syntax colouring when printing to the standard output stream,
199 on Linux, Windows, and OS X.
203 *Warning:* This functionality is under development, and is incomplete.
205 The standalone validator is the executable called `spirv-val`, and is located in
206 `<spirv-build-dir>/spirv-val`. The functionality of the validator is implemented
207 by the `spvValidate` library function.
209 The validator operates on the binary form.
211 * `spirv-val` - the standalone validator
212 * `<spirv-dir>/spirv-val`
216 Tests are only built when googletest is found.
218 The `<spirv-build-dir>/UnitSPIRV` executable runs the project tests.
219 It supports the standard `googletest` command line options.
221 The project also adds a CMake test `spirv-tools-testsuite`, which executes
222 `UnitSPIRV`. That way it's possible to run the tests using `ctest`.
225 <a name="future"></a>
227 ### Assembler and disassembler
229 * The disassembler could emit helpful annotations in comments. For example:
230 * Use variable name information from debug instructions to annotate
231 key operations on variables.
232 * Show control flow information by annotating `OpLabel` instructions with
233 that basic block's predecessors.
234 * Error messages could be improved.
238 This is a work in progress.
241 <a name="license"></a>
243 Copyright (c) 2015-2016 The Khronos Group Inc.
245 Permission is hereby granted, free of charge, to any person obtaining a
246 copy of this software and/or associated documentation files (the
247 "Materials"), to deal in the Materials without restriction, including
248 without limitation the rights to use, copy, modify, merge, publish,
249 distribute, sublicense, and/or sell copies of the Materials, and to
250 permit persons to whom the Materials are furnished to do so, subject to
251 the following conditions:
253 The above copyright notice and this permission notice shall be included
254 in all copies or substantial portions of the Materials.
256 MODIFICATIONS TO THIS FILE MAY MEAN IT NO LONGER ACCURATELY REFLECTS
257 KHRONOS STANDARDS. THE UNMODIFIED, NORMATIVE VERSIONS OF KHRONOS
258 SPECIFICATIONS AND HEADER INFORMATION ARE LOCATED AT
259 https://www.khronos.org/registry/
261 THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
262 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
263 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
264 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
265 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
266 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
267 MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
270 [spirv-registry]: https://www.khronos.org/registry/spir-v/
271 [spirv-headers]: https://github.com/KhronosGroup/SPIRV-Headers
272 [googletest]: https://github.com/google/googletest
273 [googletest-pull-612]: https://github.com/google/googletest/pull/612
274 [googletest-issue-610]: https://github.com/google/googletest/issues/610
275 [CMake]: https://cmake.org/
276 [cpp-style-guide]: https://google.github.io/styleguide/cppguide.html
277 [clang-sanitizers]: http://clang.llvm.org/docs/UsersManual.html#controlling-code-generation