arch::[−][src] x86_64:: _mm256_mask_lzcnt_epi64
🔬 This is a nightly-only experimental API. (
This is supported on x86-64 and target feature
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).