On Sat, 12 Feb 2005 12:04:48 -0500, Daniel Phillips <[EMAIL PROTECTED]> wrote: > Hi Timothy, > > Earlier, I made a big fat mistake in assuming that 8 x 8 = 8 multiplies > can be done by lookup. This would require 16 KByte tables, totally
64K bytes. > impractical. Almost all of the fragment multiplies will need to be > done in random logic unless we fall back to iterating and give up on > throughput. So this is a big worry, even without attempting 10 bit > accuracy. Can we estimate the portion of logic an 8x8 or 10x10 > multipier will eat? It's not as bad as you might think. Besides LUTs, Xilinx CLBs have a number of other elements which are designed specifically to make adds efficient. Multipliers are just a bunch of adds. There are also a number of different ways to make a multiplier that trade off different things. _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
