Felix Buenemann writes: > > - : : "r" (src), "r" (dst), "g" (threshold1), "rm" (4) //FIXME maybe more accurate then needed? > + : : "r" (src), "r" (dst), "g" (threshold1), "r" (4) //FIXME maybe more accurate then needed? Nit: If/when you commit this, also write "than" instead of "then". Diego