Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!snorkelwacker.mit.edu!bloom-beacon!eru!hagbard!sunic!news.funet.fi!cc.tut.fi!cc.tut.fi!n67786 From: n67786@cc.tut.fi (Tero Nieminen) Newsgroups: comp.sys.mac.misc Subject: Re: SGIL "Fast Math" - Just Say No? Message-ID: Date: 3 May 91 17:08:18 GMT References: Sender: n67786@cc.tut.fi (Tero Nieminen) Distribution: comp Organization: Tampere Univ. of Technology, Finland. Lines: 25 In-Reply-To: barvian@ece.cmu.edu's message of 2 May 91 22:50:34 GMT In article barvian@ece.cmu.edu (Scott Barvian) writes: Dammit, I *knew* it was too good to be true. I've gotten messages that the "Miracle Math Accelerator from Hell, er.. France" causes problems in the following applications: - HyperCard - Managing Your Money (isn't that conveeenient?) - DeltaGraph (my own personal finding- graphs come out unreadable, and the spreadsheet gives results that are completely out to lunch) Remember when your grandfather said "there's no free lunch"? Maybe the old guy was right after all. I'm putting SGIL in the init graveyard for now. Sorry to get everyone interested in this for nothing. I'm sending this file on to the umich archive guys to get this info stored with the file (unless they decide to pull it). Also worth remembering is that the other fast math inits exhibit same kind of behaviour as the ones discussed here lately. I ran into this with Radius FastMath init and ClarisCAD, where it caused abnormal rounding errors and incorrect mesurement. It was clearly visible even at drawing time when the picture was magnified enough. So beware.. :) -- Tero Nieminen Tampere University of Technology n67786@cc.tut.fi Tampere, Finland, Europe