From owner-freebsd-hackers  Mon Jan  7 11:33:30 2002
Delivered-To: freebsd-hackers@freebsd.org
Received: from femail7.sdc1.sfba.home.com (femail7.sdc1.sfba.home.com [24.0.95.87])
	by hub.freebsd.org (Postfix) with ESMTP
	id 4A9EE37B404; Mon,  7 Jan 2002 11:33:25 -0800 (PST)
Received: from math.missouri.edu ([24.12.197.197])
          by femail7.sdc1.sfba.home.com
          (InterMail vM.4.01.03.20 201-229-121-120-20010223) with ESMTP
          id <20020107193325.GDQE16463.femail7.sdc1.sfba.home.com@math.missouri.edu>;
          Mon, 7 Jan 2002 11:33:25 -0800
Message-ID: <3C39F804.43A242DD@math.missouri.edu>
Date: Mon, 07 Jan 2002 13:33:24 -0600
From: Stephen Montgomery-Smith <stephen@math.missouri.edu>
X-Mailer: Mozilla 4.79 [en] (X11; U; Linux 2.4.2 i386)
X-Accept-Language: en
MIME-Version: 1.0
To: John Baldwin <jhb@FreeBSD.org>
Cc: freebsd-hackers@FreeBSD.org,
	"Matthew D. Fuller" <fullermd@over-yonder.net>
Subject: Re: Tell gcc I have a i686
References: <XFMail.020107102642.jhb@FreeBSD.org>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-hackers.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-hackers>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-hackers>
X-Loop: FreeBSD.ORG

John Baldwin wrote:
> 
> > You know, I have no idea.  It is someone elses code.  These are the
> > instructions.  Can anyone tell me?
> >
> >                 "movl 32(%0),%1\n"
> >                 "adcl %1,32(%0)\n"
> >
> > Also, from this discussion, what I have decided to do is provide it as
> > an option for the user to add by editing the Makefile - not to do it
> > automatically.
> 
> These instructions are 386 instructions.  What we need to see are the
> contraints (the stuff after the actual instructions with colons in them) to see
> if it is somehow using Pentium Pro+ specific registers.  And actually, just for
> the record, a PPro is a 686. :)
> 

OK, this is it in context:

        register Word32 *_x = x;
        register int _a = 0;

        asm("xorl %1,%1\n"  /* clear C */
                "movl 124(%0),%1\n"
                "adcl %1,124(%0)\n"
                : : "r" (_x), "r" (_a)
        );   


-- 
Stephen Montgomery-Smith
stephen@math.missouri.edu
http://www.math.missouri.edu/~stephen

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