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Rockbox mail archiveSubject: Re: iRiver Codec - RT encoding and Fixed point libraryRe: iRiver Codec - RT encoding and Fixed point library
From: Robin V. <robinsp_at_gmail.com>
Date: Thu, 14 Jul 2005 12:15:48 +0200 This was my 2 cents suggestion. In a world far far away, I remember the performance reached by demomakers using fixed point instead of floating point this was quite amazing, but maybe it's not such a good idea. Maybe this trick was good for matrix and three dimensions game at the age where no FPU was available, not for today. Robin On 7/13/05, dave_at_beermex.com <dave_at_beermex.com> wrote: > There may well be some sort of fixed point instructions in certain > versions of the coldfire. However, not on the CF5249 that H1xx/H3xx use, > (other than the more simple fractional mode of the EMAC unit, which we are > already using in all of our codecs). > > If there is a fixed-point version of Shine MP3 encoder already optimised > for ARM then that is probably a good starting point. I'm not sure of the > merits of 'emulating' floating point using a fixed-point CPU, however (it > will either require major rewrites of the code or would just run > suboptimally - in either case, rewriting to use fixed-point data would > probably be a necessity) > > d _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockbox Received on 2005-07-14 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |