Folks, I haven't seen anyone respond to Sven's message. But this is about the right sized thing for me to help with. So barring the advent of someone with more time, I am willing and able to take on the MMX code implementation for GIMP. My recommendation is that current development proceed without expecting the current MMX code to work. Sven, et alia, can either remove it or leave it in place as a warning to others. When I have something ready to be integrated, we can syncronise then. Hopefully, that will be before 1.4 in a reasonable amount of time. But if not, it will be just as fine post 1.4 as well as to use it with GEGL. Helvetix