alt Hacker NewsAfaik, Quake does not do one divide per pixel, it is in steps of 8 pixels (see dscan.c in winquake). Yes, there is non divide but instead of taking hundreds of cycles, tables and other approximations could be used. Of course, div/vdiv which take only 14 cycles or less are a strong boost on CM4/33.
Oh, it divides only once every 8 pixels and interpolates in between and still looks so good? I stand corrected.
By the way, it's "d_scan.c" for anyone who's trying to web search for it.