Date: Fri, 27 Nov 1998 23:35:15 -0800 (PST) From: Julian Elischer <julian@whistle.com> To: "John S. Dyson" <dyson@iquest.net> Cc: Bruce Evans <bde@zeta.org.au>, current@FreeBSD.ORG Subject: Re: Fix for incorrect clobbers in asm's Message-ID: <Pine.BSF.3.95.981127233449.12108G-100000@current1.whistle.com> In-Reply-To: <199811280559.AAA04288@y.dyson.net>
next in thread | previous in thread | raw e-mail | index | archive | help
I guess bruce has volunteered to check in his fixes.....
On Sat, 28 Nov 1998, John S. Dyson wrote:
> Bruce Evans said:
> >
> > Rewritten using constraints:
> >
> > __asm __volatile("cld; rep; insb"
> > : "=D" (addr), "=c" (cnt)
> > : "0" (addr), "1" (cnt), "d" (port)
> > : "memory");
> >
> > This discards the output operands in the input variables to avoid extra
> > local variables. This is harmless because the input variables are dead,
> > and more natural because it is normal for pointers to be incremented and
> > counts to be decremented.
> >
> Yes, your specific approach is better. However, the incorrect clobbers
> do need to be fixed, or compiling kernels with egcs will be forever a pain...
>
> --
> John | Never try to teach a pig to sing,
> dyson@iquest.net | it makes one look stupid
> jdyson@nc.com | and it irritates the pig.
>
> To Unsubscribe: send mail to majordomo@FreeBSD.org
> with "unsubscribe freebsd-current" in the body of the message
>
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.3.95.981127233449.12108G-100000>