Be aware though that Intel POPCNT instruction throughput is pretty low by today's standards. When you need to popcount a lot of bits, on Intel it might make sense to do it without the use of POPCNT. This oldie but goodie still holds, on Intel: https://danluu.com/assembly-intrinsics/

In contrast, AMD can retire 4 (!) popcounts per cycle per core, if your code is able to feed it.

There's vectorized popcount in some of the optional AVX512 instruction sets, but for those to make it into consumer CPUs AMD would really have to hurt Intel pretty bad, marketshare-wise. :-)