Function _mm_fmsub_sd

pub unsafe fn _mm_fmsub_sd(a: __m128d, b: __m128d, c: __m128d) -> __m128d

Available on (x86 or x86-64) and target feature fma and x86 only.

Multiplies the lower double-precision (64-bit) floating-point elements in a and b, and subtract the lower element in c from the intermediate result. Store the result in the lower element of the returned value, and copy the upper element from a to the upper elements of the result.

Intel’s documentation