Function core::source ·
arch:: x86_64:: _mm256_gf2p8affineinv_epi64_epi8
pub unsafe fn _mm256_gf2p8affineinv_epi64_epi8( x: __m256i, a: __m256i, const B: i32 ) -> __m256i
🔬This is a nightly-only experimental API. (
Available on (x86 or x86-64) and target feature
gfni,avxand x86-64 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.