Date: Thu, 23 Sep 2004 07:26:33 GMT From: Patrick Pelissier <ppelissi@caramail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: alpha/72024: LONG_MIN / 1 sends a "Floating exception" Message-ID: <200409230726.i8N7QXTM099742@www.freebsd.org> Resent-Message-ID: <200409230730.i8N7USGv033340@freefall.freebsd.org>
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>Number: 72024
>Category: alpha
>Synopsis: LONG_MIN / 1 sends a "Floating exception"
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-alpha
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Sep 23 07:30:27 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator: Patrick Pelissier
>Release: 5.2.1
>Organization:
>Environment:
spe149.testdrive.hp.com> uname -a
FreeBSD spe149.testdrive.hp.com 5.2.1-RELEASE FreeBSD 5.2.1-RELEASE #0: Tue Feb 24 07:42:14 GMT 2004 root@mithlond.btc.adaptec.com:/usr/obj/usr/src/sys/GENERIC alpha
>Description:
The following program:
#include <limits.h>
int f(long a, long b);
int main()
{
return f(LONG_MIN, 1);
}
int f(long a, long b)
{
return a / b;
}
produces a "Floating exception (core dumped)" on alpha-unknown-freebsd5.2.1
(spe149.testdrive.hp.com) with:
gcc version 3.4.2 and gcc version 3.3.3 [FreeBSD] 20031106.
The test program was compiled without any flags:
spe149.testdrive.hp.com> /tmp/make/bin/gcc test3.c
spe149.testdrive.hp.com> ./a.out
Floating exception (core dumped)
spe149.testdrive.hp.com> /tmp/make/bin/gcc -v
Reading specs from /tmp/make/lib/gcc/alpha-unknown-freebsd5.2.1/3.4.2/specs
Configured with: ./configure --prefix=/tmp/gcc : (reconfigured) ./configure
--prefix=/tmp/gcc : (reconfigured) ./configure --prefix=/tmp/make
--enable-languages=c
Thread model: posix
gcc version 3.4.2
The problem seems to be in the internal function "__divq" which produces the exception.
(See also
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17613 )
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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