As said above the GPU in this thing apparently has hardware to do bicubic filtering or whatever you wish to officially call it, but since it supports it, you guys should add some sort of wrapper function or something similar to make it easier for emulators to take advantage of it, and also obviously homebrew for tv-out/hdmi output. B/c I see no reason to _not_ use it if you have the ability to use the thing in hardware, I was worried about it due to performance taken away(espcieally for more modern things), but since it's got hardware already there I see no reason to use it.
Btw, i got this information in the datasheet for the jz4770 it's on page 6 of the datasheet. It says it's supported, I hope that means that the secondary procssor has that feature built in, as I know bicubic is very slow to do, but the gcw should be able to handle it just fine. I just thought I'd say there here, b/c it seems like a great thing to use especially for when it's done via hdmi-out.