Function _mm512_mask_cmpgt_epi64_mask
#[target_feature(enable = "avx512f")]
pub const fn _mm512_mask_cmpgt_epi64_mask(k1: __mmask8, a: __m512i, b: __m512i) -> __mmask8Compare packed signed 64-bit integers in a and b for greater-than, and store the results in mask vector k using zeromask k1 (elements are zeroed out when the corresponding mask bit is not set).