Function _mm_test_epi64_mask

pub fn _mm_test_epi64_mask(a: __m128i, b: __m128i) -> __mmask8

Available on (x86 or x86-64) and target feature avx512f and target feature avx512vl and x86 only.

Compute the bitwise AND of packed 64-bit integers in a and b, producing intermediate 64-bit values, and set the corresponding bit in result mask k if the intermediate value is non-zero.

Intel’s documentation