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IIUC, Intel uses the term "AVX-512" as an umbrella term, and different processors support different subsets of "AVX-512" instructions [0]. AFAIK this is a brea
by DoofusOfDeath 6y ago
IIUC, Intel uses the term "AVX-512" as an umbrella term, and different processors support different subsets of "AVX-512" instructions [0].
AFAIK this is a break from previous Intel nomenclature, where any processor supporting e.g. "SSE4.2" instructions was guaranteed to support all SSE4.2 instructions.
I'm concerned that sometimes this causes confusion when talking about processor -- software compatibility.
[0] https://en.wikipedia.org/wiki/AVX-512 https://en.wikipedia.org/wiki/AVX-512
- loeg 6y agoI think the consideration GP was trying to make is that Zen (at least 1 and 2 — and I haven't heard otherwise for 3) do not support 512-bit wide AVX registers at all.