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From: ark@alice.UucP (Andrew Koenig)
Newsgroups: net.arch
Subject: Re: Data General Eclipse Floating Point Format
Message-ID: <4746@alice.UUCP>
Date: Wed, 25-Dec-85 14:45:30 EST
Article-I.D.: alice.4746
Posted: Wed Dec 25 14:45:30 1985
Date-Received: Thu, 26-Dec-85 04:12:03 EST
References: <55@dg_rtp.UUCP>
Organization: Bell Labs, Murray Hill
Lines: 9

>     The following describes the Data General Eclipse floating point format.
> Note, that some of the submissions were wrong, in specifying that the DG format
> is exactly the same as the IBM format.  It is true we use the same number of
> bits, but the IBM format expresses the exponent as a power of 2, whereas in the
> DG format, the exponent is a power of 16.

In IBM format, the exponent is a power of 16 also.  Numbers may be
unnormalized, but the only floating-point instructions that produce
unnormalized results are "add unnormalized" and "subtract unnormalized."