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dawn / dawn / 7753f63893e2b5e63ce1d9b5d15286dee31d230f
commit7753f63893e2b5e63ce1d9b5d15286dee31d230f[log] [tgz]
authorSunny Sachanandani <sunnyps@chromium.org>Wed Jun 19 07:22:03 2024 +0000
committerDawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed Jun 19 07:22:03 2024 +0000
tree49f74ef7a8e9822d60436154e07107606393cbf4
parent91e22a9fe425af2317e469a7b5d1d28b1a10febe [diff]
metal: Emit MSL powr for WGSL pow builtin

MSL pow() is different from WGSL/GLSL pow() in that it allows negative
base values and is presumably more expensive as a result. MSL `powr` is
closer to the WGSL/GLSL definition of `pow`. In WGSL spec, `pow` is
defined as `Inherited from exp2(y * log2(x))` and `log2(e)` is not
"mathematically meaningful" for `e < 0`. Further, this expectation of
disallowing `x < 0` via validation is in WebGPU CTS already in
`webgpu/shader/validation/expression/call/builtin/pow`

Bug: 347282475
Change-Id: I589255b3211db0e64cc333ca9f13639112d10847
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/194200
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Auto-Submit: Sunny Sachanandani <sunnyps@chromium.org>
Commit-Queue: Sunny Sachanandani <sunnyps@chromium.org>
22 files changed
tree: 49f74ef7a8e9822d60436154e07107606393cbf4
  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-tidy
  20. .gitattributes
  21. .gitignore
  22. .gitmodules
  23. .gn
  24. AUTHORS
  25. BUILD.bazel
  26. BUILD.gn
  27. CMakeLists.txt
  28. CMakeSettings.json
  29. CODE_OF_CONDUCT.md
  30. codereview.settings
  31. CONTRIBUTING.md
  32. CPPLINT.cfg
  33. DEPS
  34. DIR_METADATA
  35. go.mod
  36. go.sum
  37. go_presubmit_support.py
  38. LICENSE
  39. OWNERS
  40. PRESUBMIT.py
  41. README.chromium
  42. README.md
  43. 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.