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From: ramani@jhunix.hcf.jhu.edu (Ramani Duraiswami)
Newsgroups: comp.sys.mips
Subject: NaN feature(?)/bug in Mips fortran
Message-ID: <7794@jhunix.HCF.JHU.EDU>
Date: 18 Mar 91 04:34:35 GMT
Sender: ramani@jhunix.HCF.JHU.EDU
Organization: The Johns Hopkins University - HCF
Lines: 20

MIPS fortran query.

Programming/Debugging in MIPS (and SUN) fortran, after years of
programming on a Vax, is a pain in the butt because of the
NaN/Infinity "feature." 

It is very smart of the code to realize that sqrt(-1) is Not a Number,
or that 1/0 is infinity, but debugging huge codes becomes impossible,
especially as no information as to which line the mistake first
occurred is available.

I guess my questions then are...
1) Is there a compiler option to turn this ``feature'' off?
2) If not, Why Not?
3) Is there a smart way in dbx to make the program stop at the first
  occurrence of a NaN/Infinity event?


Thanks in anticipation

ramani