popcount64
#ifndef popcount64 // might be defined to use a __builtin
__strong_alias(popcountl, popcount64)
__strong_alias(popcountll, popcount64)
unsigned int popcount64(__uint64_t) __constfunc;
res = popcount64(val);
const int cores = popcount64(fuse);
aprint_naive(": %u core%s\n", popcount64(fuse), fuse == 1 ? "" : "s");
aprint_normal(": %u core%s", popcount64(fuse), fuse == 1 ? "" : "s");
const int numcores = popcount64(fuse);
unsigned int popcount64(uint64_t) __constfunc;