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Date: Wed, 15 Apr 1998 10:12:53 +1000
From: Craig Wilson <craig@natsoft.com.au>
Organization: National Software Pty Ltd
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To: Eivind Eklund <eivind@FreeBSD.ORG>
CC: ajhar@noao.edu, freebsd-bugs@FreeBSD.ORG
Subject: Re: i386/3895
References: <199804142326.QAA14665@freefall.freebsd.org>
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Eivind Eklund wrote:
> 
> Synopsis: False FPE (floating point exception) signaled
> 
> State-Changed-From-To: open-closed
> State-Changed-By: eivind
> State-Changed-When: Tue Apr 14 16:25:04 PDT 1998
> State-Changed-Why:
> We don't have any reproducable case, and we're not likely to get any.
> The submitter is no longer bothered by the problem.
> 
I have had this problem with the SCO Xenix C compiler.
It is reproducable with the C compiler in FreeBSD 2.2.2
It will happen when a routine which returns a float is not
properly defined in another source file that uses that routine.
Adding "double getdouble();" prototype in float.c fixes the problem.

float.c
main()
{
	int	i;
	double	iD;
	i=0;
lp:	iD=getdouble();
	i++;
	printf("i=%d\n\r",i);
	goto lp;
}

float1.c
double	getdouble()
{
	double	iD;
	iD=1;
	return iD;
}

cc float.c float1.c -ofloat

This program will perform 7 loops before crashing with a FPE.

I hope this info helps.

Craig Wilson
National Software Pty Ltd

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