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From: bauman@shell.com (E. G. Bauman)
Newsgroups: comp.sys.sun
Subject: Bug in DOS Windows
Keywords: Software
Message-ID: <10050@brazos.Rice.edu>
Date: 17 Jul 90 21:41:48 GMT
Sender: root@rice.edu
Organization: Sun-Spots
Lines: 27
Approved: Sun-Spots@rice.edu
X-Sun-Spots-Digest: Volume 9, Issue 269, message 12

I found a serious bug in DOS Windows on a SPARCstation.  Compile the
following FORTRAN program with Microsoft FORTRAN version 5.0.

	do 10 i=-5,5
	   x = 10.0 ** i
	   write(6,*)i,x
10	continue
	end

Then run it under DOS Windows 1.0:

H:\>exp
         -5   1#NAN........
run-time error M6111: MATH
- floating-point error: stack underflow


H:\> 

This program runs just fine on a PS/2 model 80 without the need for
recompilation.  Moral of the story - beware when doing floating point math
under DOS Windows on a SPARCstation.

	Evan G. Bauman
	Shell Development Company - Westhollow Research Center
	PO Box 1380; Houston, TX 77251-1380
	bauman@shell.com   or for the uucp types: {sun,bcm}!shell!bauman