## _mm256_clmulepi64_epi128

# Function _mm256_clmulepi64_epi128

1.89.0 · Source

    pub fn _mm256_clmulepi64_epi128(
        a: __m256i,
        b: __m256i,
        const IMM8: i32,
    ) -> __m256i

Available on x86 and target feature `vpclmulqdq` only.
Expand description

Performs a carry-less multiplication of two 64-bit polynomials over the finite field GF(2) - in each of the 2 128-bit lanes.

The immediate byte is used for determining which halves of each lane `a` and `b` should be used. Immediate bits other than 0 and 4 are ignored. All lanes share immediate byte.

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