Function _mm256_mask_gf2p8mul_epi8
#[target_feature(enable = "gfni", enable = "avx512bw", enable = "avx512vl")]
pub fn _mm256_mask_gf2p8mul_epi8(src: __m256i, k: __mmask32, a: __m256i, b: __m256i) -> __m256iPerforms a multiplication in GF(2^8) on the packed bytes. The field is in polynomial representation with the reduction polynomial x^8 + x^4 + x^3 + x + 1.
Uses the writemask in k - elements are copied from src if the corresponding mask bit is not set. Otherwise the computation result is written into the result.