From owner-freebsd-bugs  Fri Jan 10  6:50: 5 2003
Delivered-To: freebsd-bugs@hub.freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id C763E37B401
	for <freebsd-bugs@hub.freebsd.org>; Fri, 10 Jan 2003 06:50:03 -0800 (PST)
Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 7D50643ED8
	for <freebsd-bugs@hub.freebsd.org>; Fri, 10 Jan 2003 06:50:03 -0800 (PST)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1])
	by freefall.freebsd.org (8.12.6/8.12.6) with ESMTP id h0AEo3NS002467
	for <freebsd-bugs@freefall.freebsd.org>; Fri, 10 Jan 2003 06:50:03 -0800 (PST)
	(envelope-from gnats@freefall.freebsd.org)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.12.6/8.12.6/Submit) id h0AEo3hA002466;
	Fri, 10 Jan 2003 06:50:03 -0800 (PST)
Date: Fri, 10 Jan 2003 06:50:03 -0800 (PST)
Message-Id: <200301101450.h0AEo3hA002466@freefall.freebsd.org>
To: freebsd-bugs@FreeBSD.org
Cc: 
From: Andrew Gallatin <gallatin@cs.duke.edu>
Subject: Re: bin/43299: march=pentium4 miscompiles msun/src/e_pow.c
Reply-To: Andrew Gallatin <gallatin@cs.duke.edu>
Sender: owner-freebsd-bugs@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-bugs.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-bugs>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-bugs>
X-Loop: FreeBSD.org

The following reply was made to PR bin/43299; it has been noted by GNATS.

From: Andrew Gallatin <gallatin@cs.duke.edu>
To: freebsd-gnats-submit@FreeBSD.org
Cc: mi@aldan.algebra.com
Subject: Re: bin/43299: march=pentium4 miscompiles msun/src/e_pow.c
Date: Fri, 10 Jan 2003 09:47:17 -0500 (EST)

 The problem seems to have re-appeared with more recent kernel and
 world.  With a kernel and world dated January 8th (noon EST),
 I see the following behaviour:
 
 
 % cc -O -march=pentium4 /home/gallatin/hacks/t.c ../i387/s_scalbn.S ../i387/e_sqrt.S e_pow.c
 % ./a.out
 2^2.1 is 0.5
 11^-2.1 is 0.0909091
 
 Leaving off the -O allows the binary to be built correctly:
 
 % cc  -march=pentium4 /home/gallatin/hacks/t.c ../i387/s_scalbn.S ../i387/e_sqrt.S e_pow.c
 % /a.out
 
 
 The problem seems to be gcc specific, as binaries built with icc seem
 to work correctly regardless of optimization level or use of sse2.
 
 Drew

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message