Function _mm256_mask_testn_epi16_mask

#[target_feature(enable = "avx512bw", enable = "avx512vl")]
pub const fn _mm256_mask_testn_epi16_mask(k: __mmask16, a: __m256i, b: __m256i) -> __mmask16

Compute the bitwise NAND of packed 16-bit integers in a and b, producing intermediate 16-bit values, and set the corresponding bit in result mask k (subject to writemask k) if the intermediate value is zero.

Intel's documentation