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From: conners@cs.fau.edu (Sean Conner)
Newsgroups: rec.games.programmer,comp.os.msdos.programmer,comp.graphics
Subject: Re: Need hard core help doing some 3d optimizations
Message-ID: <1991Apr17.235954.2334@cs.fau.edu>
Date: 17 Apr 91 23:59:54 GMT
References: <1991Apr13.154112.11345@dircon.co.uk> <1991Apr16.210819.17873@cs.fau.edu> <1991Apr17.133142.24149@maytag.waterloo.edu>
Organization: Florida Atlantic University, Boca Raton
Lines: 22

In article <1991Apr17.133142.24149@maytag.waterloo.edu> dmurdoch@watstat.waterloo.edu (Duncan Murdoch) writes:
>
>Just in case you're interested:  the times for the 486 are
>
>  IDIV    19-44
>  FDIV    73
>  IMUL    13-42
>  FMUL    11-16
>
>So it looks as though floating point math would be a contender, even without
>a MIPS, as long as you avoided the divides.  I don't know the algorithms
>you want to use, but very often the denominator in a series of divides stays the
>same for a long time, so you can replace it with a series of 
>multiplies by the reciprocal.
>
>Duncan Murdoch
>dmurdoch@watstat.waterloo.edu

  So, we have the 386/387 covered.  What about the 68020/68881(2)?  I have
an Amiga at home :-)

 -spc (Why do I program in Assembly?  Speed.  Pure and simple.)