Function core_arch::x86::_mm_cmp_pd

pub unsafe fn _mm_cmp_pd(a: __m128d, b: __m128d, imm8: i32) -> __m128d

This is supported on x86 and target feature avx,sse2 only.

Compares packed double-precision (64-bit) floating-point elements in a and b based on the comparison operand specified by imm8.

Intel's documentation