Function _mm_fmaddsub_pd
#[target_feature(enable = "fma")]
pub const fn _mm_fmaddsub_pd(a: __m128d, b: __m128d, c: __m128d) -> __m128dMultiplies packed double-precision (64-bit) floating-point elements in a
and b, and alternatively add and subtract packed elements in c to/from
the intermediate result.