Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.csd.uwm.edu!cs.utexas.edu!sun-barr!sun!puffin!mrm
From: mrm%puffin@Sun.COM (Marianne Mueller)
Newsgroups: gnu.gcc
Subject: isinf() & other IEEE functions
Message-ID: <121831@sun.Eng.Sun.COM>
Date: 16 Aug 89 16:17:52 GMT
Sender: news@sun.Eng.Sun.COM
Reply-To: mrm@sun.UUCP (Marianne Mueller)
Organization: Sun Microsystems, Mountain View
Lines: 10

isinf() and the other functions recommended by the IEEE standard for
floating point arithmetic are implemented on Suns in inline templates
for the math library.  (/usr/lib/libm.il, etc.)   You can get the 
hex patterns for IEEE values from these text files.   A good reference
for the IEEE standard is the special issue of IEEE Computer,
Vol 13, No 1, Jan 1980, which has a number of interesting & helpful
articles, as well as the text of an early draft of the standard.  

I suppose any further discussion of IEEE & libm functions shouldn't
take place in gnu.gcc!