On Thu, Apr 18, 2024 at 10:11:08PM +0000, Devulapalli, Raghuveer wrote:
>> On that note, is it necessary to also check for avx512f? At the moment,
>> we are assuming that's supported if the other AVX-512 instructions are
>> available.
>
> No, it's not needed. There are no CPU's with avx512bw/avx512popcnt
> without avx512f. Unfortunately though, avx512popcnt does not mean
> avx512bw (I think the deprecated Xeon Phi processors falls in this
> category) which is why we need both.
Makes sense, thanks. I'm planning to commit this fix sometime early next
week.
--
Nathan Bossart
Amazon Web Services: https://aws.amazon.com
