commit | fd8f0e2fac0937d725de428824e6bbaf781a02a3 | [log] [tgz] |
---|---|---|
author | Nicolas Capens <capn@google.com> | Wed Jul 01 00:27:23 2020 -0400 |
committer | Nicolas Capens <nicolascapens@google.com> | Tue Jul 07 01:46:28 2020 +0000 |
tree | 918bf9e33cefbb76fb2c321c11ad909d7a96136d | |
parent | 8866a85cf02db536b9dbc07be496826eb7197fd2 [diff] |
Fix float-to-half conversion The Reactor code in floatToHalfBits() did not match the reference implementation of the sw::half type, leading to failures in dEQP tests which are enabled by the shaderStorageImageExtendedFormats feature. The previous code was based on https://gist.github.com/rygorous/2156668. It doesn't round to nearest even in case of a tie, but that's not demanded by Vulkan. It merits a closer look to see whether there was a bug, or whether dEQP-VK is too strict. Dawn also found the previous implementation to not handle infinity correctly, so a bug seems likely. In any case, it's good to use a reference implementation for now, and look for optimization opportunities later. Bug: b/147900455 Bug: swiftshader:147 Tests: dEQP-VK.image.format_reinterpret.buffer.*_b10g11r11_ufloat_pack32 Change-Id: Id817a012ff38af814907c2de2914ec24565622f3 Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/46148 Presubmit-Ready: Nicolas Capens <nicolascapens@google.com> Kokoro-Result: kokoro <noreply+kokoro@google.com> Tested-by: Nicolas Capens <nicolascapens@google.com> Reviewed-by: Antonio Maiorano <amaiorano@google.com>
SwiftShader is a high-performance CPU-based implementation of the Vulkan and OpenGL ES graphics APIs12. Its goal is to provide hardware independence for advanced 3D graphics.
SwiftShader libraries can be built for Windows, Linux, and Mac OS X.
Android and Chrome (OS) build environments are also supported.
Visual Studio
For building 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.
CMake
Install CMake for Linux, Mac OS X, or Windows and use either the IDE or run the following terminal commands:
cd build cmake .. make --jobs=8 ./vk-unittests
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.
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
Authenticate your account here: https://swiftshader-review.googlesource.com/new-password
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. To clone the repository and install the commit hook in one go:
git clone https://swiftshader.googlesource.com/SwiftShader && (cd SwiftShader && curl -Lo `git rev-parse --git-dir`/hooks/commit-msg https://gerrit-review.googlesource.com/tools/hooks/commit-msg ; chmod +x `git rev-parse --git-dir`/hooks/commit-msg)
Changes are uploaded to Gerrit by executing:
git push origin HEAD:refs/for/master
SwiftShader's OpenGL ES 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:
subzero contains a fork of the Subzero project. It is part of Google Chrome‘s (Portable) Native Client project. Its authoritative source is at https://chromium.googlesource.com/native_client/pnacl-subzero/. The fork was made using git-subtree to include all of Subzero’s history, and until further notice it should not diverge from the upstream project. Contributions must be tested using the README instructions, reviewed at https://chromium-review.googlesource.com, and then pulled into the SwiftShader repository.
llvm-subzero contains a minimized set of LLVM dependencies of the Subzero project.
PowerVR_SDK contains a subset of the PowerVR Graphics Native SDK for running several sample applications.
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.
See docs/Index.md.
Public mailing list: swiftshader@googlegroups.com
General bug tracker: https://g.co/swiftshaderbugs
Chrome specific bugs: https://bugs.chromium.org/p/swiftshader
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.