Contact [email protected]

ExplainerNone

Specification
https://gpuweb.github.io/gpuweb/wgsl/#:~:text=packed_4x8_integer_dot_product

Summary

Functionality added to the WebGPU/WGSL spec after its first shipment in a
browser. Adds support new WGSL builtins to work with 4 8-bit numbers packed
in a u32. The new dot product functionality is especially useful for
executing machine learning models that work on 8-bit weights.


Blink componentBlink>WebGPU
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EWebGPU>

TAG reviewNone

TAG review statusNot applicable

Risks


Interoperability and Compatibility

DP4 WGSL builtins have not yet been implemented in any browser, but have
been approved by the GPU for the Web Community Group, with representatives
from Chrome, Firefox, and Safari.


*Gecko*: No signal (
https://github.com/mozilla/standards-positions/issues/949)

*WebKit*: Positive (
https://github.com/WebKit/standards-positions/issues/294#issuecomment-1877411933)
Note that this is a blanket approval from Safari for addition to the v1
WebGPU/WGSL spec.

*Web developers*: Positive Multiple ML frameworks are looking to use this
(ONNX runtime, TF.js, etc)

*Other signals*:

WebView application risks

Does this intent deprecate or change behavior of existing APIs, such that
it has potentially high risk for Android WebView-based applications?

None at the moment, WebGPU currently does not ship on Android WebView.


Debuggability

None


Will this feature be supported on all six Blink platforms (Windows, Mac,
Linux, ChromeOS, Android, and Android WebView)?No

All platforms will eventually have support. Will immediately be available
on Android, ChromeOS, Mac, and Windows, since those platforms already
support WebGPU. Linux is planned to have WebGPU support in the future, so
this feature will become available when WebGPU does.


Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
?Yes

WebGPU/WGSL have a conformance test suite (https://github.com/gpuweb/cts)
that is regularly pulled into Chromium and part of the testing of Dawn/Tint
in Chromium. Note that tests are still being written, but the feature will
not be launched until it is fully tested.


Flag name on chrome://flagsNone

Finch feature nameNone

Non-finch justificationNone

Requires code in //chrome?False

Tracking bughttps://bugs.chromium.org/p/tint/issues/detail?id=1497

Availability expectationFeature is available only in Chromium browsers for
the near future, on the order of months. Other browsers intend to ship
WebGPU support, but don't have specified timelines.

Non-OSS dependencies

Does the feature depend on any code or APIs outside the Chromium open
source repository and its open-source dependencies to function?
No

Estimated milestones

No milestones specified


Anticipated spec changes

Open questions about a feature may be a source of future web compat or
interop issues. Please list open issues (e.g. links to known github issues
in the project for the feature specification) whose resolution may
introduce web compat/interop risk (e.g., changing to naming or structure of
the API in a non-backward-compatible way).
None

Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/6457584892772352

This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.

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