Re: 0.3-0.2=0.999999999998?

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#16292

From: Roedy Green
Date: Fri, 05 Mar 1999 00:00

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On Fri, 5 Mar 1999 10:37:51 -0500, "Harry Rowe" <hrowe@erinet.com>
wrote:

>However, I was thinking that if Java allowed
>the 10 byte double extended, gave the
>programmer access to different IEEE
>rounding modes, and did some sub-expression
>handling differently, then perhaps the program
>below would evaluate to true?

You would have to ask someone more familiar with the details.  My
experience is I wrote ORGASM years ago, a postfix assembler for the
8087 floating point chip.  If I recall correctly, all that would
happen with the guard mode bits is you would compute your 0.1 a few
more places, but the binary compare would still come up unequal.
Floating point equality is for all practical purposes a meaningless
operation.

For the JAVA GLOSSARY and the CMP Utilities: <http://mindprod.com>
--
Roedy Green,  Canadian Mind Products 
-30-

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From: roedy@mindprod.com (Roedy Green)
Subject: Re: 0.3-0.2=0.999999999998?
Date: 1999/03/05
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