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From: meissner@dg_rtp.UUCP (Michael Meissner)
Newsgroups: net.arch
Subject: Re: Data General Eclipse Floating Point
Message-ID: <64@dg_rtp.UUCP>
Date: Mon, 30-Dec-85 13:17:06 EST
Article-I.D.: dg_rtp.64
Posted: Mon Dec 30 13:17:06 1985
Date-Received: Wed, 1-Jan-86 00:53:23 EST
References: <55@dg_rtp.UUCP> <4746@alice> <3000001@convexs>
Reply-To: meissner@dg_rtp.UUCP (Michael Meissner)
Organization: Data General (Languages @ Westborough, MA.)
Lines: 16
Summary: Mea Culpa

In article <3000001@convexs> wallach@convexs.UUCP writes:
>
>the data general and ibm formats and interpretation are IDENTICAL.
>
>there is one difference.  on the data general machine this is an optional
>floating point round mode, UNBIASED ROUNDING with two guard digits (hex)
>and a sticky bit.  this is equivalent to the ieee rounding mode extended to
>hex exponent machines.  thus on the dg machine, using the unbiased round
>mode, more accurate answers will be obtained as contrasted to the equivalent
>program executed on a ibm machine.

What can I say, except that I stand corrected.  I orignally thought they were
the same too, but a knowlable DG system's engineer steered me wrong.  In any
case, since Steve Wallach was the architect for the MV/8000, he should know.

	Michael Meissner