pub unsafe fn _mm_mask_cmp_epi64_mask<const IMM3: i32>(
    k1: u8,
    a: __m128i,
    b: __m128i
) -> u8
🔬This is a nightly-only experimental API. (stdsimd)
Available on x86-64 only.
Expand description

Compare packed signed 64-bit integers in a and b based on the comparison operand specified by imm8, and store the results in mask vector k using zeromask k1 (elements are zeroed out when the corresponding mask bit is not set).

Intel’s documentation