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From: john@newave.UUCP (John A. Weeks III)
Newsgroups: comp.lang.c,comp.sys.ibm.pc.programmer
Subject: Not A Number in IEEE Math
Keywords: IEEE floating point
Message-ID: <44@newave.UUCP>
Date: 16 Feb 90 05:13:29 GMT
Reply-To: john@newave.UUCP (John A. Weeks III)
Followup-To: comp.lang.c
Organization: NeWave Communications Ltd, Eden Prairie, MN
Lines: 23


My understanding of the NaN (not a number) value in IEEE math is
that once you get NaN, the operators +, -, /, *, and = are supposed
to propagate the NaN value.  Is my understanding correct?

Well, while using MetaWare's HIGH-C compiler for the 80386 chip, I
have discovered that:

			NaN / NaN = 1.0

			      and

			0.0 * NaN = 0.0.

Is this correct behavior?  I think HIGH-C is broken...

-john-

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John A. Weeks III               (612) 942-6969               john@newave.mn.org
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