Date: 20 Dec 2002 21:24:39 -0500 From: Joe Marcus Clarke <marcus@marcuscom.com> To: current@freebsd.org Subject: WEIRD! div() broken on -CURRENT? Message-ID: <1040437478.29101.23.camel@shumai.marcuscom.com>
next in thread | raw e-mail | index | archive | help
--=-3yZhQdDsV/2so3ycgHnv
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable
Okay, I must be losing my mind. Does anyone know why the following
program compiled with stock gcc-3.2.1, stock CFLAGS, and no CPUTYPE
produces:
ddy.quot =3D 1
ddy.rem =3D -1077937744
on -CURRENT, and:
ddy.quot =3D 8
ddy.rem =3D 0
On -stable?
#include <stdlib.h>
#include <stdio.h>
main(void) {
div_t ddy;
int dy, dy_frac;
ddy =3D div (768, 96);
dy =3D ddy.quot;
dy_frac =3D ddy.rem;
printf("ddy.quot =3D %d\n", dy);
printf("ddy.rem =3D %d\n", dy_frac);
return 0;
}
> cc -O -pipe -o xxx xxx.c
I'm doing something wrong, right? I mean, this can't be right. I've
verified this now on a P4 running:
FreeBSD jclarke-pc.cisco.com 5.0-RC FreeBSD 5.0-RC #0: Mon Dec 16
02:54:55 EST 2002 =20
marcus@jclarke-pc.cisco.com:/usr/obj/usr/src/sys/JCLARKE-PC i386
And a PIII running:
FreeBSD sysinfo.mezzweb.com 5.0-CURRENT FreeBSD 5.0-CURRENT #0: Mon Dec
16 09:44:28 CST 2002 =20
root@sysinfo.mezzweb.com:/usr/src/sys/i386/compile/BSDROCKS i386
Both machines produce the same result, while my -stable machines produce
the correct result. Both machines have fresh -CURRENT headers. Oh, and
if I move the xxx binary from my -stable machine to my -CURRENT machine,
it produces the correct result. Both machines have WITNESS and
INVARIANTS disabled. The PIII has MATH_EMULATE compiled in, but the P4
does not. Any help would be most appreciated as I think this is causing
Nautilus crashes on -CURRENT. Thanks.
Joe
--=20
PGP Key : http://www.marcuscom.com/pgp.asc
--=-3yZhQdDsV/2so3ycgHnv
Content-Type: application/pgp-signature; name=signature.asc
Content-Description: This is a digitally signed message part
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.1 (FreeBSD)
iD8DBQA+A9Dmb2iPiv4Uz4cRAnhbAKCMNuyAM9FhZGQsyMaZjNMiDEn2PgCfSlZn
wAjQe/YSguti6SEFcFMfiNE=
=O6Ak
-----END PGP SIGNATURE-----
--=-3yZhQdDsV/2so3ycgHnv--
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1040437478.29101.23.camel>