Date: Sun, 13 Dec 1998 00:09:30 +0100 (CET) From: Joakim.Henriksson@ludd.luth.se To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: ports/9061: Problem with constant folding in jikes, with patch. Message-ID: <199812122309.AAA06477@rmstar.campus.luth.se>
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>Number: 9061
>Category: ports
>Synopsis: Problem with constant folding in jikes, with patch.
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-ports
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Dec 12 15:10:00 PST 1998
>Last-Modified:
>Originator: Joakim Henriksson
>Organization:
University of Luleå
>Release: FreeBSD 3.0-CURRENT i386
>Environment:
Current.
>Description:
Jikes on certain programs causes SIGFPE since jikes folds constants in a bad way. Folding divisions by zero should not be done or if you want to do it you should use a constant for it not calculate it. Patch also submited to shields@watson.ibm.com .
>How-To-Repeat:
public class foo{
foo(){
double a = 1.0/0.0;
}
}
>Fix:
*** double.cpp.orig Thu Dec 3 16:08:56 1998
--- double.cpp Sat Dec 12 23:54:12 1998
***************
*** 125,136 ****
IEEEdouble IEEEdouble::operator/ (IEEEdouble op)
{
! return IEEEdouble(DoubleValue() / op.DoubleValue());
}
IEEEdouble& IEEEdouble::operator/= (IEEEdouble op)
{
! *this = *this / op;
return *this;
}
--- 125,142 ----
IEEEdouble IEEEdouble::operator/ (IEEEdouble op)
{
! if (op.DoubleValue() == 0.0)
! return HUGE_VAL;
! else
! return IEEEdouble(DoubleValue() / op.DoubleValue());
}
IEEEdouble& IEEEdouble::operator/= (IEEEdouble op)
{
! if (op.DoubleValue() == 0.0)
! *this = HUGE_VAL;
! else
! *this = *this / op;
return *this;
}
>Audit-Trail:
>Unformatted:
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