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From: "kargl at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/33595] FAIL: gfortran.dg/nint_2.f90 -O0 execution test
Date: Sun, 28 Dec 2008 22:16:00 -0000 [thread overview]
Message-ID: <20081228221441.13087.qmail@sourceware.org> (raw)
In-Reply-To: <bug-33595-276@http.gcc.gnu.org/bugzilla/>
------- Comment #13 from kargl at gcc dot gnu dot org 2008-12-28 22:14 -------
(In reply to comment #12)
> Subject: Re: FAIL: gfortran.dg/nint_2.f90 -O0 execution test
>
> > See libm on FreeBSD.
> >
> > http://www.freebsd.org/cgi/cvsweb.cgi/src/lib/msun/src/s_roundf.c
>
> So, the ceilf implementation was changed to a floorf implementation
> to correct rounding issues about three years ago...
>
> I'll give it a try. The default rounding mode on hpux is nearest.
>
It also uses your idea or something very similar. Notice the
changes in the if-statements.
if (x >= 0.0) {
- t = ceilf(x);
- if (t - x > 0.5)
- t -= 1.0;
+ t = floorf(x);
+ if (t - x <= -0.5)
+ t += 1.0;
return (t);
} else {
- t = ceilf(-x);
- if (t + x > 0.5)
- t -= 1.0;
+ t = floorf(-x);
+ if (t + x <= -0.5)
+ t += 1.0;
return (-t);
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33595
next prev parent reply other threads:[~2008-12-28 22:16 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-29 21:27 [Bug fortran/33595] New: " danglin at gcc dot gnu dot org
2007-10-01 13:13 ` [Bug fortran/33595] " fxcoudert at gcc dot gnu dot org
2007-10-01 16:33 ` dave at hiauly1 dot hia dot nrc dot ca
2007-10-01 16:39 ` fxcoudert at gcc dot gnu dot org
2007-10-01 17:29 ` dave at hiauly1 dot hia dot nrc dot ca
2007-12-22 7:38 ` jvdelisle at gcc dot gnu dot org
2008-12-04 3:05 ` billingd at gcc dot gnu dot org
2008-12-04 5:13 ` billingd at gcc dot gnu dot org
2008-12-28 20:26 ` danglin at gcc dot gnu dot org
2008-12-28 20:41 ` dave at hiauly1 dot hia dot nrc dot ca
2008-12-28 20:47 ` danglin at gcc dot gnu dot org
2008-12-28 21:03 ` kargl at gcc dot gnu dot org
2008-12-28 21:50 ` dave at hiauly1 dot hia dot nrc dot ca
2008-12-28 22:16 ` kargl at gcc dot gnu dot org [this message]
2008-12-29 17:12 ` danglin at gcc dot gnu dot org
2009-03-28 9:41 ` fxcoudert at gcc dot gnu dot org
2009-03-28 21:16 ` danglin at gcc dot gnu dot org
2009-03-29 7:36 ` [Bug libfortran/33595] " fxcoudert at gcc dot gnu dot org
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