pub unsafe fn _mm256_popcnt_epi64(a: __m256i) -> __m256i
🔬This is a nightly-only experimental API. (stdsimd #48556)
Available on (x86 or x86-64) and target feature avx512vpopcntdq,avx512vl and x86-64 only.
Expand description

For each packed 64-bit integer maps the value to the number of logical 1 bits.

Intel’s documentation