This Month in Linebender, September 2025 #125
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DJMcNab
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Oct 3, 2025
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| ## Fearless SIMD | ||
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| Fearless SIMD is our SIMD infrastructure library. | ||
| It provides a solid way for writing SIMD operations portably across WASM, Aarch64, x86, and x86_64. | ||
| The improvements we made in September include: | ||
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| - [fearless_simd##75][]: Introduce int-from-mask conversion. | ||
| - [fearless_simd#76][]: Add `SimdBase::witness`, allowing access to the `Simd` implementation from vector types. | ||
| - [fearless_simd#79][],[fearless_simd#86][]: Improved bitshifting support. | ||
| - [fearless_simd#80][]: Implement assignment operators (`+=`, etc.). | ||
| - [fearless_simd#88][]: Adopt FMA semantics to match `std`. | ||
| - [fearless_simd#91][]: Unary integer negation. | ||
| - [fearless_simd#96][]: Expression-oriented dispatch macro. | ||
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| We look forward to seeing ecosystem use cases develop. |
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cc @Ralith let me know if I've missed anything important (from https://github.com/linebender/fearless_simd/pulls?q=updated%3A%3E%3D2025-09-01+-created%3A%3E%3D2025-10-01+-merged%3A%3E%3D2025-10-01+sort%3Acreated-asc+)
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Introduce int-from-mask conversion
This was reverted in favor of more general bitcasting in linebender/fearless_simd#81.
Seems fine otherwise, unless we're trying to call out every little filled-in gap.
Added gradient screenshot, filled in Xilem sections.
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Currently only a stub. I plan to get the first pass of content today.
I've set a target date of the 6th, as I'm away after then (see #chatter > Graphite Community Meetup)