Function _mm_mask_reduce_max_epi8

#[target_feature(enable = "avx512bw", enable = "avx512vl")]
pub const fn _mm_mask_reduce_max_epi8(k: __mmask16, a: __m128i) -> i8

Reduce the packed 8-bit integers in a by maximum using mask k. Returns the maximum of all active elements in a.

Intel's documentation