From:	Carlo Nervi <nervi AT silver DOT ch DOT unito DOT it>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Optimize switch -O2 create FPU error
Date:	Mon, 16 Sep 1996 11:05:11 -0700
Organization:	Laboratory of Molecular Electrochemistry
Lines:	16
Message-ID:	<323D96D7.5DA0@lem.ch.unito.it>
NNTP-Posting-Host:	chpc110.ch.unito.it
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Dear all,
I'm new to this newsgroup and djgpp v2.00, but I had some
experiences on old djgpp v1.12maint5.
My problem is the following:
my program works fine under djgpp v1.12, but exit with SIGFPE
exception under djgpp v2.00. Using fsdb something strange happen:
sometimes it exit with a Underflow exception, but sometime else
running under fsdb the program runs, but with wrong numeric results.

Finally I was able to catch the problem: by using -O2 or -O3
optimization switches the problem persist, whereas by using -O
the problem disappear totally.
Anybody had similar experience or it is due to a bug already solved
which a don't know?

Thanks for help, Carlo Nervi

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