From owner-freebsd-java  Sat Feb 15 11:10:54 2003
Delivered-To: freebsd-java@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 3FA0437B405
	for <java@FreeBSD.ORG>; Sat, 15 Feb 2003 11:10:53 -0800 (PST)
Received: from ms-smtp-01.texas.rr.com (ms-smtp-01.texas.rr.com [24.93.36.229])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 7953F43F3F
	for <java@FreeBSD.ORG>; Sat, 15 Feb 2003 11:10:52 -0800 (PST)
	(envelope-from wbooth@austin.rr.com)
Received: from wdbnb.boothscientific.com (cs24243209-38.austin.rr.com [24.243.209.38])
	by ms-smtp-01.texas.rr.com (8.12.5/8.12.2) with ESMTP id h1FJ5Nbm014157
	for <java@FreeBSD.ORG>; Sat, 15 Feb 2003 14:05:23 -0500 (EST)
From: David Booth <wbooth@austin.rr.com>
To: java@FreeBSD.ORG
Subject: Re: Math.pow bug for jdk1.3.1-p8 ?
Date: Sat, 15 Feb 2003 13:10:50 -0600
User-Agent: KMail/1.5
References: <3E4C9DDD.4040204@gddsn.org.cn> <20030216.005020.894433699.shudo@localhost> <20030215174554.GA97285@moo.holy.cow>
In-Reply-To: <20030215174554.GA97285@moo.holy.cow>
MIME-Version: 1.0
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-Id: <200302151310.51070.wbooth@austin.rr.com>
Sender: owner-freebsd-java@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-java.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-java>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-java>
X-Loop: FreeBSD.org

On Saturday 15 February 2003 11:45 am, parv wrote:
> in message <20030216.005020.894433699.shudo@localhost>, wrote
> shudo@computer.org thusly...
>
> > From: Greg Lewis <glewis@eyesbeyond.com>
> >
> > > On Sat, Feb 15, 2003 at 05:54:21PM +0900, shudo@computer.org
> > > wrote:
>
> ...
>
> > > > It is certain that there is a problem around fdlibm, FreeBSD's
> > > > gcc 2.95.4 or how the fdlibm compiled (compiler flags?).
> > >
> > > Sounds like its quite possibly due to problems with
> > > optimisation.  Obviously, java_g uses no optimisation when
> > > compiling,
>
> ...
>
> > Next thing we can do to track the cause down is to compile
> > e_pow.c, w_sqrt.c, e_sqrt.c, s_fabs.c, s_scalbn.c and s_copysign.c
> > with different compiler options (-O0, -O2 and so on) and see the
> > result of the ieee754_pow() function.
>
> I have only -O option set.  I would love to test all the variations,
> but my computer is too slow for me to wait the two-three iterations
> to test.
>
A few of more data points:

1.3.1p7 built on 5.0 release gcc3.2.1 -O2 TestPow works (i=512);
1.3.1p8 built on 5.0 release gcc3.2.1 -O2 TestPow fails (i=17);
1.3.1p7 built on 4.7 stable gcc3.2.2 -O2 TestPow works (i=512);
1.3.1p8 built on 4.7 stable gcc3.2.1 -O2 TestPow fails (i=17);
1.3.1p8 built on 4.7 stable gcc3.2.2 -O2 TestPow fials (i=17);
>
>   - Parv


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