*BSD News Article 39931


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From: richard@cogsci.ed.ac.uk (Richard Tobin)
Subject: Re: Interested in PowerPC for Linux / FreeBSD / NetBSD?
Message-ID: <D16ony.K5z@cogsci.ed.ac.uk>
Organization: HCRC, University of Edinburgh
References: <3cphs0$l6e@ddi2.digital.net> <stephenkD0vyyn.1GG@netcom.com> <D12MGt.1L9@tyrell.net>
Date: Wed, 21 Dec 1994 23:16:45 GMT
Lines: 17

In article <D12MGt.1L9@tyrell.net> john@tyrell.net (John A. Matzen) writes:
>If a bank is using the FPU to do numerical calculations, they could be loosing
>hundreds of pennies every day due to rounding errors.  It doesn't matter
>how many digits of precision the FPU is using.

Sorry to be rude, but this is just drivel.  IEEE floating point is
guaranteed (when correctly implemented!) to be exact for operations
such as addition on integers up to 53 (?) bits.  Floating point isn't
just any old approximation; it's a well-defined approximation that
can be safely used by people who understand it (except on Pentiums).

-- Richard
-- 
Satan himself, in a sermon preached from the pulpit of North Berwick
church, comforted his many servants by assuring them that no harm could
befall them "sa lang as their hair wes on, an sould newir latt ane teir
fall fra thair ene".                    - J G Frazer, The Golden Bough