Function core::arch::x86::_mm256_mask_lzcnt_epi64

pub unsafe fn _mm256_mask_lzcnt_epi64(
    src: __m256i, 
    k: __mmask8, 
    a: __m256i
) -> __m256i

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

This is supported on x86 and target feature avx512cd,avx512vl only.

Counts the number of leading zero bits in each packed 64-bit integer in a, and store the results in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).

Intel’s documentation