Function _mm256_cmpeq_epu8_mask
#[target_feature(enable = "avx512bw", enable = "avx512vl")]
pub const fn _mm256_cmpeq_epu8_mask(a: __m256i, b: __m256i) -> __mmask32Compare packed unsigned 8-bit integers in a and b for equality, and store the results in mask vector k.