Function core::source ·
arch:: x86:: _mm512_mask_gf2p8affineinv_epi64_epi8
pub unsafe fn _mm512_mask_gf2p8affineinv_epi64_epi8( src: __m512i, k: __mmask64, x: __m512i, a: __m512i, const B: i32 ) -> __m512i
🔬This is a nightly-only experimental API. (
Available on (x86 or x86-64) and target feature
gfni,avx512bw,avx512fand x86 only.
Performs an affine transformation on the inverted packed bytes in x. That is computes a*inv(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. The inverse of a byte is defined with respect to the reduction polynomial x^8+x^4+x^3+x+1. The inverse of 0 is 0. 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 copied from src if the corresponding mask bit is not set. Otherwise the computation result is written into the result.