Function creusot_contracts::std::arch::x86_64::_mm256_mask_lzcnt_epi64

pub unsafe fn _mm256_mask_lzcnt_epi64(
    src: __m256i,
    k: u8,
    a: __m256i,
) -> __m256i

🔬This is a nightly-only experimental API. (stdarch_x86_avx512)

Available on x86-64 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