Function core::arch::x86::_mm_mask_popcnt_epi64

pub unsafe fn _mm_mask_popcnt_epi64(
    src: __m128i, 
    k: __mmask8, 
    a: __m128i
) -> __m128i

🔬 This is a nightly-only experimental API. (stdsimd #48556)

This is supported on x86 and target feature avx512vpopcntdq,avx512vl only.

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

Uses the writemask in k - elements are copied from src if the corresponding mask bit is not set. Otherwise the computation result is written into the result.

Intel’s documentation