# Function core::arch::x86::_mm512_clmulepi64_epi128[−][src]

    pub unsafe fn _mm512_clmulepi64_epi128(
        a: __m512i,
        b: __m512i,
        imm8: i32
    ) -> __m512i

🔬 This is a nightly-only experimental API. (`stdsimd` #48556)
This is supported on x86 and target feature `avx512vpclmulqdq,avx512f` only.

Performs a carry-less multiplication of two 64-bit polynomials over the finite field GF(2^k) - 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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