|author||Nicolas Capens <firstname.lastname@example.org>||Wed May 11 01:20:16 2022 -0400|
|committer||Nicolas Capens <email@example.com>||Thu May 12 00:01:49 2022 +0000|
Revert rcpss/rsqrtss instrumentation to default propagation _mm_round_ss() takes two vector arguments, while _mm_rcp_ss() takes only one, despite both underlying instructions taking one source operand. LLVM uses the C++ intrinsics behavior, so x86_sse_rcp_ss and x86_sse_rsqrt_ss don't support the shuffle operation between the first and second argument that is performed by handleUnarySdSsIntrinsic(). Instead the behavior of the fallback path, which calls maybeHandleSimpleNomemIntrinsic() and propagates the shadow, was fine. Bug: b/172238865 Change-Id: I1bfbcaf518dd90f5a113cdef2b75d1a602e43d90 Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/65808 Tested-by: Nicolas Capens <firstname.lastname@example.org> Reviewed-by: Sean Risser <email@example.com> Kokoro-Result: kokoro <firstname.lastname@example.org>
SwiftShader is a high-performance CPU-based implementation of the Vulkan graphics API12. Its goal is to provide hardware independence for advanced 3D graphics.
NOTE: The ANGLE project can be used to achieve a layered implementation of OpenGL ES (aka. “SwANGLE”).
SwiftShader libraries can be built for Windows, Linux, and macOS.
Android and Chrome (OS) build environments are also supported.
cd build cmake .. cmake --build . --parallel ./vk-unittests
Tip: Set the CMAKE_BUILD_PARALLEL_LEVEL environment variable to control the level of parallelism.
To build the Vulkan ICD library, use Visual Studio 2019 to open the project folder and wait for it to run CMake. Open the CMake Targets View in the Solution Explorer and select the vk_swiftshader project to build it.
The SwiftShader libraries act as drop-in replacements for graphics drivers.
On Windows, most applications can be made to use SwiftShader's DLLs by placing them in the same folder as the executable. On Linux, the
LD_LIBRARY_PATH environment variable or
-rpath linker option can be used to direct applications to search for shared libraries in the indicated directory first.
In general, Vulkan applications look for a shared library named
vulkan-1.dll on Windows (
vulkan-1.so on Linux). This ‘loader’ library then redirects API calls to the actual Installable Client Driver (ICD). SwiftShader's ICD is named
libvk_swiftshader.dll, but it can be renamed to
vulkan-1.dll to be loaded directly by the application. Alternatively, you can set the
VK_ICD_FILENAMES environment variable to the path to
vk_swiftshader_icd.json file that is generated under the build directory (e.g.
.\SwiftShader\build\Windows\vk_swiftshader_icd.json). To learn more about how Vulkan loading works, read the official documentation here.
See CONTRIBUTING.txt for important contributing requirements.
The canonical repository for SwiftShader is hosted at: https://swiftshader.googlesource.com/SwiftShader.
All changes must be reviewed and approved in the Gerrit review tool at: https://swiftshader-review.googlesource.com. You must sign in to this site with a Google Account before changes can be uploaded.
Next, authenticate your account here: https://swiftshader-review.googlesource.com/new-password (use the same e-mail address as the one configured as the Git commit author).
All changes require a Change-ID tag in the commit message. A commit hook may be used to add this tag automatically, and can be found at: https://gerrit-review.googlesource.com/tools/hooks/commit-msg. You can execute
git clone https://swiftshader.googlesource.com/SwiftShader and manually place the commit hook in
SwiftShader/.git/hooks/, or to clone the repository and install the commit hook in one go:
git clone https://swiftshader.googlesource.com/SwiftShader && (cd SwiftShader && git submodule update --init --recursive third_party/git-hooks && ./third_party/git-hooks/install_hooks.sh)
On Windows, this command line requires using the Git Bash Shell.
Changes are uploaded to Gerrit by executing:
git push origin HEAD:refs/for/master
Some tests will automatically be run against the change. Notably, presubmit.sh verifies the change has been formatted using clang-format 11.0.1. Most IDEs come with clang-format support, but may require upgrading/downgrading to the clang-format version 11.0.0 release version (notably Chromium's buildtools has a clang-format binary which can be an in-between revision which produces different formatting results).
SwiftShader's Vulkan implementation can be tested using the dEQP test suite.
See docs/dEQP.md for details.
The third_party directory contains projects which originated outside of SwiftShader:
llvm-subzero contains a minimized set of LLVM dependencies of the Subzero project.
googletest contains the Google Test project, as a Git submodule. It is used for running unit tests for Chromium, and Reactor unit tests. Run
git submodule update --init to obtain/update the code. Any contributions should be made upstream.
Public mailing list: email@example.com
The SwiftShader project is licensed under the Apache License Version 2.0. You can find a copy of it in LICENSE.txt.
Files in the third_party folder are subject to their respective license.
The legal authors for copyright purposes are listed in AUTHORS.txt.
CONTRIBUTORS.txt contains a list of names of individuals who have contributed to SwiftShader. If you‘re not on the list, but you’ve signed the Google CLA and have contributed more than a formatting change, feel free to request to be added.