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WASM relaxed SIMD support #389

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robertknight opened this issue Oct 18, 2024 · 1 comment

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robertknight commented Oct 18, 2024 •

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The WASM Relaxed SIMD instructions were stabilized in Rust v1.82.

This includes several instructions which should have a significant impact on performance if used in matrix multiplication kernels:

f32x4_relaxed_madd for f32 kernels.
i32x4_relaxed_dot_i8x16_i7x16_add for int8 kernels. In the best case scenario this gets compiled to AVX VNNI or Arm SDOT

Attempting to use these instructions currently causes wasm-bindgen to fail because the feature is not supported in walrus.

Owner Author

robertknight commented Nov 14, 2024

See also rustwasm/wasm-bindgen#4263.

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