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From: ram@jane.Jpl.Nasa.Gov (Bob Mortensen)
Newsgroups: comp.graphics
Subject: Fixed Point Arithmetic
Message-ID: <RAM.89Dec19170118@jane.Jpl.Nasa.Gov>
Date: 20 Dec 89 01:01:55 GMT
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Reply-To: bob@zest.jpl.nasa.gov
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Organization: Image Analysis Systems Grp, JPL
Lines: 13

Does anyone have some good fixed point arithmetic routines (or macros) for C?
Or is there at least any good references on this subject.  Specifically, I
have an application that is written in floating point but could just as well
use fixed, and I'm sure that it would be sped up dramatically.  I would like
to use 32-bit integers with 16-bits of integer and 16-bits of fraction.

I hate to reinvent the wheel.  8-)

Thanks in advance,
Bob Mortensen			Visualization and Earth Science Applications
						   Jet Propulsion Laboratory
ram@jane.jpl.nasa.gov					4800 Oak Grove Drive
bob@zest.jpl.nasa.gov					 Pasadena, CA  91109