RE: Popcount optimization using AVX512

> -----Original Message-----
> From: Nathan Bossart <nathandbossart@gmail.com>
> Sent: Monday, March 18, 2024 2:08 PM
> To: David Rowley <dgrowleyml@gmail.com>
> Cc: Amonson, Paul D <paul.d.amonson@intel.com>; Andres Freund
>...
>
> The only reason I left it out was because I couldn't convince myself that it
> wasn't dead code, given we assume that popcntq is available in
> pg_popcount64_fast() today.  But I don't see any harm in adding that just in
> case.

I am not sure how to read this. Does this mean that for popcount32_fast and popcount64_fast I can assume that the
x86(_64)instructions exists and stop doing the runtime checks for instruction availability? 

Thanks,
Paul