"ToadKing unveiled what he’s been working on lately: a libretro port of PPSSPP! Meanwhile, aliaspider and Squarepusher have been working on porting RetroArch to Sony’s PSP. Put these two works-in-progress together and you have the first instance of RetroArch-ception."
http://www.libretro.com/index.php/re...our-retroarch/