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| Date: | Wed, 3 Nov 1999 02:28:58 +0100 |
| From: | Marc Lehmann <pcg AT opengroup DOT org> |
| To: | pgcc AT delorie DOT com |
| Subject: | Re: pgcc-2.95.2: strange nbench results |
| Message-ID: | <19991103022858.I9319@cerebro.laendle> |
| Mail-Followup-To: | pgcc AT delorie DOT com |
| References: | <Pine DOT LNX DOT 4 DOT 10 DOT 9911020245200 DOT 14261-100000 AT goliath DOT csn DOT tu-chemnitz DOT de> |
| Mime-Version: | 1.0 |
| In-Reply-To: | <Pine.LNX.4.10.9911020245200.14261-100000@goliath.csn.tu-chemnitz.de>; from Ronald Wahl on Tue, Nov 02, 1999 at 02:49:05AM +0100 |
| X-Operating-System: | Linux version 2.2.13 (root AT cerebro) (gcc version 2.95.1 19990816 (release)) |
| Sender: | Marc Lehmann <pcg AT goof DOT com> |
| Reply-To: | pgcc AT delorie DOT com |
| X-Mailing-List: | pgcc AT delorie DOT com |
| X-Unsubscribes-To: | listserv AT delorie DOT com |
On Tue, Nov 02, 1999 at 02:49:05AM +0100, Ronald Wahl <rwahl AT gmx DOT net> wrote:
Iiiih, 'n gmx-er.
> moin,
Iiih, 'n Norddeutscher ;->
> just run nbench-byte-2.1 compiled with pgcc-2.95.2 (-mk6 -O6 -ffast-math
> -funroll-all-loops). Look especially at the neural net bench:
I think this is a large improvement.. IIRC, nbench always segfaulted on the
neural net test, now it only gives a wrong result ;->
Seriously, this is probably a bug in pgcc, although (having inspected the
test some times) it's not clear to me wether the compiler isn't allowed to
just optimize it away...
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