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dawn/dawn/000664cb06522d7fa9fe709b74f79bdf7e1fd4c9
commit
000664cb06522d7fa9fe709b74f79bdf7e1fd4c9
[log] [tgz]
author
Peter McNeeley <petermcneeley@google.com>
Tue Jul 08 19:31:38 2025 -0700
committer
Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>
Tue Jul 08 19:31:38 2025 -0700
tree
15b806b8a665f4e57d1b0fd8cc6c0541df3c568f
parent
01b46e44db6e3a5538334f23255219824b40816a [diff]
[tint] Abs polyfill for all backends

Now that the signed arithmetic polyfill has landed [0] the workaround
for abs (as max(x,-x)) will now function correctly.

The issue with abs(i32) was only proven to be observed on intel and
nvidia but have have chosen to proactively extend this fix to all
backends and devices. This decisions was made based on the polyfill
being very low overhead and assuming a commonality between all
backend compilers (LLVM).

[0]
https://dawn-review.googlesource.com/c/dawn/+/249135


Bug: 426999765
Change-Id: I2597cbcaacf8e68f93eaa7fb14d67d16cadcf970
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/247896
Commit-Queue: Peter McNeeley <petermcneeley@google.com>
Reviewed-by: James Price <jrprice@google.com>
30 files changed
tree: 15b806b8a665f4e57d1b0fd8cc6c0541df3c568f
  1. .github/
  2. .vscode/
  3. build_overrides/
  4. docs/
  5. generator/
  6. include/
  7. infra/
  8. scripts/
  9. src/
  10. test/
  11. third_party/
  12. tools/
  13. webgpu-cts/
  14. build
  15. buildtools
  16. testing
  17. .bazelrc
  18. .clang-format
  19. .clang-format-ignore
  20. .clang-tidy
  21. .git-blame-ignore-revs
  22. .gitattributes
  23. .gitignore
  24. .gitmodules
  25. .gn
  26. .style.yapf
  27. .vpython3
  28. AUTHORS
  29. BUILD.bazel
  30. BUILD.gn
  31. CMakeLists.txt
  32. CMakeSettings.json
  33. CODE_OF_CONDUCT.md
  34. codereview.settings
  35. CONTRIBUTING.md
  36. CPPLINT.cfg
  37. DEPS
  38. DIR_METADATA
  39. go.mod
  40. go.sum
  41. go_presubmit_support.py
  42. LICENSE
  43. OWNERS
  44. PRESUBMIT.py
  45. README.chromium
  46. README.md
  47. WATCHLISTS
  48. WORKSPACE.bazel
README.md

Build Status Matrix Space

Dawn, a WebGPU implementation

Dawn is an open-source and cross-platform implementation of the WebGPU standard. More precisely it implements webgpu.h that is a one-to-one mapping with the WebGPU IDL. Dawn is meant to be integrated as part of a larger system and is the underlying implementation of WebGPU in Chromium.

Dawn provides several WebGPU building blocks:

  • WebGPU C/C++ headers that applications and other building blocks use.
    • The webgpu.h version that Dawn implements.
    • A C++ wrapper for the webgpu.h.
  • A “native” implementation of WebGPU using platforms' GPU APIs: D3D12, Metal, Vulkan and OpenGL. See per API support for more details.
  • A client-server implementation of WebGPU for applications that are in a sandbox without access to native drivers
  • Tint is a compiler for the WebGPU Shader Language (WGSL) that can be used in standalone to convert shaders from and to WGSL.

Helpful links:

Documentation table of content

Developer documentation:

User documentation: (TODO, figure out what overlaps with the webgpu.h docs)

License

BSD 3-Clause License, please see LICENSE.

Disclaimer

This is not an officially supported Google product.