Function _mm_cmp_sd_mask
#[target_feature(enable = "avx512f")]
pub fn _mm_cmp_sd_mask(a: __m128d, b: __m128d, IMM8: i32) -> __mmask8Compare the lower double-precision (64-bit) floating-point element in a and b based on the comparison operand specified by imm8, and store the result in mask vector k.