pub unsafe fn _mm256_mask_cmp_ps_mask<const IMM8: i32>(
    k1: u8,
    a: __m256,
    b: __m256
) -> u8
🔬 This is a nightly-only experimental API. (stdsimd)
This is supported on x86-64 and target feature avx512f,avx512vl only.
Expand description

Compare packed single-precision (32-bit) floating-point elements 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