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A comment on A 94x speed improvement demonstrated using handwritten assembly. Parent comment

Re:A 94x speed improvement demonstrated using handwritten as... by mort96 on Monday November 04, 2024 @09:00AM (#42041580)
I mean currently, contributors who want to work on vectorized algorithms need to know C, amd64 assembly with SSE/AVX instructions, aarch64 assembly with NEON instructions and aarch64 assembly with SVE instructions (and presumably soon, or maybe already, risc-v assembly with the vector extension). I wouldn't say it's simpler than needing to know C, C with SSE/AVX instricsics, C with NEON intrinsics, C with SVE intrinsics and C with risc-v vector intrinsics.
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Re:A 94x speed improvement demonstrated using handwritten as... by astrange on Monday November 04, 2024 @03:48PM (#42045835)
You don't need to submit all of those, but generally these vectorized DSP functions are parts of decoding straight out of the spec, so there isn't a new way to do it.

Sometimes there is of course. In that case you can get someone else to help, or one platform just runs ahead of the others.

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Re:A 94x speed improvement demonstrated using handwritten as... by mort96 on Monday November 04, 2024 @04:07PM (#42045985)
Right, but you see my point, don't you? For every set of intrinsics you'd need to know as a contributor if the vectorized code was in C, there is an assembly language and a set of intrinsics you need to know as a contributor today. Moving to C wouldn't increase the set of things a contributor needs to know.
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