pub fn _mm_mask_testn_epi64_mask(
    k: __mmask8,
    a: __m128i,
    b: __m128i,
) -> __mmask8Available on x86 and target feature 
avx512f and target feature avx512vl only.Expand description
Compute the bitwise NAND of packed 64-bit integers in a and b, producing intermediate 64-bit values, and set the corresponding bit in result mask k (subject to writemask k) if the intermediate value is zero.