From owner-freebsd-current  Sun Mar 23  9: 3:22 2003
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id F22C837B404; Sun, 23 Mar 2003 09:03:20 -0800 (PST)
Received: from mailgate.rz.uni-karlsruhe.de (mailgate.rz.uni-karlsruhe.de [129.13.64.97])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id B2C4143F75; Sun, 23 Mar 2003 09:03:19 -0800 (PST)
	(envelope-from till@f111.hadiko.de)
Received: from f111.hadiko.de (hadif111.hadiko.uni-karlsruhe.de [172.20.42.141])
	by mailgate.rz.uni-karlsruhe.de with esmtp (Exim 3.36 #1)
	id 18x8sP-0003eL-00; Sun, 23 Mar 2003 18:03:17 +0100
Received: from f111.hadiko.de (localhost [127.0.0.1])
	by f111.hadiko.de (8.12.7/8.12.8) with ESMTP id h2NH2kYQ001952;
	Sun, 23 Mar 2003 17:02:46 GMT
	(envelope-from till@f111.hadiko.de)
Received: (from till@localhost)
	by f111.hadiko.de (8.12.7/8.12.8/Submit) id h2NH2jNt001951;
	Sun, 23 Mar 2003 18:02:45 +0100 (CET)
Date: Sun, 23 Mar 2003 18:02:45 +0100
From: Till Riedel <till@f111.hadiko.de>
To: Anti <fearow@attbi.com>
Cc: David Schultz <das@FreeBSD.org>,
	sgk@troutmask.apl.washington.edu, freebsd-current@FreeBSD.org
Subject: Re: libm problem
Message-ID: <20030323170244.GA1911@f111.hadiko.de>
References: <20030318173051.GA2322@f111.hadiko.de> <20030319131317.GA670@HAL9000.homeunix.com> <20030321235237.GA8097@f111.hadiko.de> <20030322111233.F4471@gamplex.bde.org> <20030322005435.GA8393@f111.hadiko.de> <20030322051443.GA13854@HAL9000.homeunix.com> <20030322182846.GA81615@troutmask.apl.washington.edu> <20030322123951.67271b29.fearow@attbi.com> <20030323074114.GA80906@HAL9000.homeunix.com> <20030323070808.0d3f63c0.fearow@attbi.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20030323070808.0d3f63c0.fearow@attbi.com>
User-Agent: Mutt/1.5.1i
Sender: owner-freebsd-current@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-current.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-current>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-current>
X-Loop: FreeBSD.ORG

On Sun, Mar 23, 2003 at 07:08:08AM -0600, Anti wrote:
> On Sat, 22 Mar 2003 23:41:14 -0800
> David Schultz <das@FreeBSD.org> wrote:
> 
> > Thus spake Anti <fearow@attbi.com>:
> > > On Sat, 22 Mar 2003 10:28:46 -0800
> > > Steve Kargl <sgk@troutmask.apl.washington.edu> wrote:
> > > 
> > > > Pentium 4 is definitely broken on 5.x.  Perhaps, we should remove
> > > > the footshooting.
> > > > 
> > > > --- bsd.cpu.mk.orig     Sat Mar 22 10:23:42 2003
> > > > +++ bsd.cpu.mk  Sat Mar 22 10:27:11 2003
> > > > @@ -62,7 +62,9 @@
> > > >  .  elif ${CPUTYPE} == "k5"
> > > >  _CPUCFLAGS = -march=pentium
> > > >  .  elif ${CPUTYPE} == "p4"
> > > > -_CPUCFLAGS = -march=pentium4
> > > > +# XXX gcc 3.2.2 appears to generate bad code on FreeBSD 5.x
> > > > +#_CPUCFLAGS = -march=pentium4
why not
+_CPUCFLAGS = -march=pentium4 -mno-sse2
> choose, and in the case of pentium4 producing broken code the
> obvious fallback would be pentium3... 
above would be in fact the same because only the SSE2 code differs from
march=pentium3 which in turn only defines SSE additionally (which
probably generates the slower code compared to pentiumpro) as i see it. 
code generation for all x86 uses the same rules (i386.md) 
except that some rules only apply if TARGET_SSE2 is defined. 

till

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