There's a "fused multiply-add" numerical operation defined in IEEE FP provides the implementation a shortcut compared to the two separate instructions. It doesn

There's a "fused multiply-add" numerical operation defined in IEEE FP provides the implementation a shortcut compared to the two separate instructions. It doesn't have the extra roundings applied in the intermediate results. The resulting extra accuracy can be a good or bad thing depending on whether you prefer reproducible results (vs other expressions of the algorithm) or more accuracy.