Re: Looking for a fast exp(x) where -10.0<=x<=10.0

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Article #1040

#1040

From: Dave Mc Mahan
Date: Fri, 02 Nov 1990 03:19

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 In a previous article, scott@walt.disney.com (Scott Watson) writes:
>Hi y'all -
>
>I have a need for an fast exp(x) function...
>
>x is a float and can range inside +-10.0.
>
>Some sort of low granularity (read: *big array*) lookup table w/
>interpolation, or something... 

How much accuracy do you need, and how fast does it have to be?  Also, what
kind of CPU are you using and how much memory can you dedicate to a lookup
table?

>Scott Watson / Walt Disney Imagineering                   scott@walt.disney.com

   -dave

-- 
Dave McMahan                            mcmahan@netcom.uucp
					{apple,amdahl,claris}!netcom!mcmahan

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!usc!apple!netcom!mcmahan
From: mcmahan@netcom.UUCP (Dave Mc Mahan)
Newsgroups: comp.dsp,sci.math.num-analysis
Subject: Re: Looking for a fast exp(x) where -10.0<=x<=10.0
Keywords: exp fast functions lookup tables
Message-ID: <16021@netcom.UUCP>
Date: 2 Nov 90 03:19:26 GMT
References: <1990Nov1.184820.5796@walt.disney.com>
Organization: Dave McMahan @ NetCom Services
Lines: 22

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