"FMA also only increases numerical accuracy, it doesn't decrease numerical accuracy". This strictly speaking isn't true. For example, xx-yy will sometimes be mo

"FMA also only increases numerical accuracy, it doesn't decrease numerical accuracy". This strictly speaking isn't true. For example, xx-yy will sometimes be more accurate than fma(x,x, -y*y) (e.g. if x==y). That said, I agree that fma is different from the rest in that it will on average, usually, increase accuracy.