From owner-freebsd-standards@FreeBSD.ORG  Mon Dec 10 05:29:50 2007
Return-Path: <owner-freebsd-standards@FreeBSD.ORG>
Delivered-To: freebsd-standards@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 7340516A41A;
	Mon, 10 Dec 2007 05:29:50 +0000 (UTC)
	(envelope-from brde@optusnet.com.au)
Received: from mail05.syd.optusnet.com.au (mail05.syd.optusnet.com.au
	[211.29.132.186])
	by mx1.freebsd.org (Postfix) with ESMTP id E9A1213C447;
	Mon, 10 Dec 2007 05:29:49 +0000 (UTC)
	(envelope-from brde@optusnet.com.au)
Received: from c211-30-219-213.carlnfd3.nsw.optusnet.com.au
	(c211-30-219-213.carlnfd3.nsw.optusnet.com.au [211.30.219.213])
	by mail05.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id
	lBA5TjlP011340
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
	Mon, 10 Dec 2007 16:29:47 +1100
Date: Mon, 10 Dec 2007 16:29:45 +1100 (EST)
From: Bruce Evans <brde@optusnet.com.au>
X-X-Sender: bde@delplex.bde.org
To: David Schultz <das@FreeBSD.org>
In-Reply-To: <20071209214927.GB9698@VARK.MIT.EDU>
Message-ID: <20071210162247.O3964@delplex.bde.org>
References: <20071012180959.GA36345@troutmask.apl.washington.edu>
	<20071206090833.GA95428@VARK.MIT.EDU>
	<20071206231143.GA63969@troutmask.apl.washington.edu>
	<20071207173222.D702@delplex.bde.org>
	<20071209214927.GB9698@VARK.MIT.EDU>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Cc: freebsd-standards@FreeBSD.org,
	Steve Kargl <sgk@troutmask.apl.washington.edu>
Subject: Re: [PATCH] hypotl, cabsl, and code removal in cabs
X-BeenThere: freebsd-standards@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Standards compliance <freebsd-standards.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-standards>, 
	<mailto:freebsd-standards-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-standards>
List-Post: <mailto:freebsd-standards@freebsd.org>
List-Help: <mailto:freebsd-standards-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-standards>, 
	<mailto:freebsd-standards-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 10 Dec 2007 05:29:50 -0000

On Sun, 9 Dec 2007, David Schultz wrote:

> On Fri, Dec 07, 2007, Bruce Evans wrote:
> [...]
>> Anyway, the software version of sqrtl is irrelevant on
>> athlon-xp, since athlon-xp has sqrtl in hardware (takes 35 cycles).
>> Similarly for amd64, ia64 and possibly sparc64 (sparc64 has sqrt in
>> hardware so it hopefully has sqrtl in hardware).  arm and powerpc
>> apparently have long double == double, so the software version of sqrtl
>> is apparently only needed on ia64.
>
> In general, even if we don't use it on any architectures that
> FreeBSD currently supports, I'd like to have a working MI
> implementation checked in before we add a bunch of MD
> versions. Otherwise we risk overburdening people trying to port
> FreeBSD to new architectures. Having an MI version makes
> cross-testing easier, too.

I agree.  I could write amd64 and i386 versions in asm the most important
functions in about 5 minutes each, but have refrained from doing so since 
I think this would get in the way of general support.

> For ia64, we can use Intel's BSD-licensed math lib.

Sure.  I use it a hacked up version of the glibc version of it locally
as a gold standard, but don't want to maintain it.  Is is fully
BSD-licensed?

Bruce