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 x86-64 and target feature avx512vpclmulqdq,avx512f only.
Expand description

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.

Intel’s documentation