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by CuriousCosmic 1038 days ago
In terms of being broadly available, most of AVX-512 (ER, PF, 4FMAPS, and 4VNNIW haven't been available on any new hardware since 2017) is available on basically any Intel cpu manufactured since 2020 as well as on all AMD Zen4 (2022 and on) cpus.

https://en.wikipedia.org/wiki/AVX-512#CPUs_with_AVX-512

I can't speak to being error free or other issues but it should at the very least be present on any modern desktop, laptop, or server x86 CPU you could buy today.

Edit: I forgot to mention but Intel's Alder lake CPUs only have partial support presumably due to some issue with E cores. I'd guess Intel will get their shit together eventually wrt this now that AMD is shipping all their hardware with this instruction set.
2 comments
unnah 1038 days ago
Intel seems to be going for market segmentation, with AVX-512 only available on their server CPUs. The option to enable AVX-512 has been removed from Alder Lake CPUs since 2022, and there is no AVX-512 on Raptor Lake.

AMD also keeps making and selling Zen 3 and Zen 2 chips as lower-cost products, and those do not have AVX-512.

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the8472 1038 days ago
With AVX10 intel will make the instructions available again on all segments. SIMD register width will vary between cores but the instructions will be there.
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wtallis 1038 days ago
I don't think it was intentional market segmentation, just poor planning: the whole heterogenous cores strategy seems to have been thrown together in a hurry and they didn't have time to add AVX-512 to their Atom cores in an area-efficient way (so as not to negate the point of having E-cores).
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nullifidian 1038 days ago
>most of AVX-512 is available on basically any Intel cpu manufactured since 2020

That's incorrect. On the consumer cpu side Intel introduced AVX-512 for one generation in 2021 (Rocket lake), but than removed AVX-512 from the subsequent Alder Lake using bios updates, and fused it off in later revisions. It's also absent from the current Raptor Lake. So actually it's only available on Intel's server grade cpus.

>Edit: I forgot to mention but Intel's Alder lake CPUs only have partial support presumably due to some issue with E cores.

No, this wiki page is outdated.

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