Function core::arch::x86_64::_mm_fnmsub_ss

pub unsafe fn _mm_fnmsub_ss(a: __m128, b: __m128, c: __m128) -> __m128

This is supported on x86-64 and target feature fma only.

Multiplies the lower single-precision (32-bit) floating-point elements in a and b, and subtract packed elements in c from the negated intermediate result. Store the result in the lower element of the returned value, and copy the 3 upper elements from a to the upper elements of the result.

Intel's documentation