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WGSL: packed 4x8 integer dot product (DP4)

Category

Graphics

Type

Chromium catches up

Status

Enabled by default (Chrome 123)

Intent stage

None

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.

Standards & signals

• Specification: https://gpuweb.github.io/gpuweb/wgsl/#:~:text=packed_4x8_integer_dot_product
• Firefox: No signal
• Safari: Closed Without a Position — 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)
• Tracking bug: https://bugs.chromium.org/p/tint/issues/detail?id=1497

View on chromestatus.com