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## _mm_maskz_gf2p8mul_epi8

# Function _mm_maskz_gf2p8mul_epi8

1.89.0 · Source

    pub fn _mm_maskz_gf2p8mul_epi8(k: __mmask16, a: __m128i, b: __m128i) -> __m128i

Available on x86-64 and target feature `gfni` and target feature `avx512bw` and target feature `avx512vl` only.
Expand description

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.

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.

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