# Function core::arch::x86_64::_mm512_clmulepi64_epi128

source ·

    pub unsafe fn _mm512_clmulepi64_epi128(
        a: __m512i,
        b: __m512i,
        const IMM8: i32
    ) -> __m512i

🔬This is a nightly-only experimental API. (`stdsimd` #48556)
Available on (x86 or x86-64) and target feature `vpclmulqdq,avx512f` only.
Expand description

Performs a carry-less multiplication of two 64-bit polynomials over the finite field GF(2) - in each of the 4 128-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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