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From: tgl@a.sei.cmu.edu (Tom Lane)
Newsgroups: net.wanted,net.micro.68k
Subject: Re: Wanted: trig fcns in C or for 68k
Message-ID: <214@a.sei.cmu.edu>
Date: Wed, 15-Jan-86 11:41:52 EST
Article-I.D.: a.214
Posted: Wed Jan 15 11:41:52 1986
Date-Received: Fri, 17-Jan-86 07:17:03 EST
References: <181@imagen.UUCP>
Organization: Carnegie-Mellon University, CS/RI
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In <181@imagen.UUCP> geof writes:
> I am in need of an implementation of floating point routines for the 68000.
> Actually, the greatest need is for just the trig functions, following IEEE
> floating point (I have the rest, but the trig functions are implemented
> poorly).  They could be implemented in assembly language or C.

If you're willing to write the code yourself, there is a truly
outstanding book called "Software Manual for the Elementary Functions",
by Wm Cody & Wm Waite, Prentice-Hall, 1980.  It gives flowcharts,
coefficient values, and extensive discussion for implementation of
first-rate routines for the basic transcendental functions.
You can write code in assembly, C, or whatever given the info in
the book; you do need a pre-existing set of basic arithmetic routines
(+,-,*,/) which should be IEEE quality in order to get good results.

		tom lane (lane@a.cs.cmu.edu on ARPA)