Function _mm512_gf2p8mul_epi8 

pub fn _mm512_gf2p8mul_epi8(a: __m512i, b: __m512i) -> __m512i

Available on x86-64 and target feature gfni and target feature avx512f only.

Performs 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.

Intel’s documentation