Function core::arch::x86_64::_mm256_clmulepi64_epi128

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

🔬 This is a nightly-only experimental API. (stdsimd #48556)

This is supported on x86-64 and target feature avx512vpclmulqdq,avx512vl only.

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

Intel’s documentation