Apparently, Intel's next generation desktop processors do not have AVX-512 support. https://www.anandtech.com/show/16881/a-deep-dive-into-intels-alder-lake-microarchitectures/5 …
Mask registers and scatter instructions are different things. AVX2 supports masked scatter/gather, but not mask registers (you can mask using another 256-bit register). AVX-512 has mask _registers_, which are special 64-bit registers that only hold masks.
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I have only recently had the opportunity to deploy on AVX-2, so I don't have a strong opinion about scatter/gather on it. But glancing at the tables, I can't say I know why AVX-512 would be any better than AVX-2:pic.twitter.com/5VCGefUMis
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I would be interested to hear from someone who has used both.
End of conversation
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