pub unsafe fn _mm512_maskz_gf2p8affine_epi64_epi8<const B: i32>(
    k: u64,
    x: __m512i,
    a: __m512i
) -> __m512i
🔬 This is a nightly-only experimental API. (stdsimd)
This is supported on x86-64 and target feature avx512gfni,avx512bw,avx512f only.
Expand description

Performs an affine transformation on the packed bytes in x. That is computes a*x+b over the Galois Field 2^8 for each packed byte with a being a 8x8 bit matrix and b being a constant 8-bit immediate value. Each pack of 8 bytes in x is paired with the 64-bit word at the same position in a.

Uses the writemask in k - elements are zeroed in the result if the corresponding mask bit is not set. Otherwise the computation result is written into the result.

Intel’s documentation