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dawn / dawn / e8253e98d62b23736c45a1916fe52fca37661417
commite8253e98d62b23736c45a1916fe52fca37661417[log] [tgz]
authorJiawei Shao <jiawei.shao@intel.com>Tue May 06 17:44:24 2025 -0700
committerDawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>Tue May 06 17:44:24 2025 -0700
treea00a20b9c8e23539ac7d315e57b93108f6246e00
parent955392691b352343ec52eb8e21b8bea05515481d [diff]
[dawn] Use `std::countl_zero()` in C++20

This patch always uses the function `std::countl_zero()` (counting
the number of consecutive zeros starting from the most significant
bit) instead of the equivalent ones that are platform-dependent
(e.g. `_BitScanForward()` on Windows, `__builtin_clz()` in GCC).

This patch also removes `dawn::ScanReverse()` as it is no longer
used right now.

Bug: 343500108
Change-Id: Ia96b81d9d9d495f17f87bb08c36e27f9ad0f3a39
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/240674
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Loko Kung <lokokung@google.com>
4 files changed
tree: a00a20b9c8e23539ac7d315e57b93108f6246e00
  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.