From: Pavel Machek <pavel@suse.cz>
To: Andi Kleen <ak@suse.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, linux-kernel@vger.kernel.org
Subject: Re: [Q] Looking for an emulation for CMOV* instructions.
Date: Sat, 12 Jan 2002 06:31:36 +0000 [thread overview]
Message-ID: <20020112063136.E511@toy.ucw.cz> (raw)
In-Reply-To: <m26669olcu.fsf@goliath.csn.tu-chemnitz.de.suse.lists.linux.kernel> <E16Oocq-0005tX-00@the-village.bc.nu.suse.lists.linux.kernel> <p737kqpp60w.fsf@oldwotan.suse.de>
In-Reply-To: <p737kqpp60w.fsf@oldwotan.suse.de>; from ak@suse.de on Fri, Jan 11, 2002 at 10:54:07AM +0100
Hi!
> > The kernel isnt there to fix up the fact authors can't read. Its also very
> > hard to get emulations right. I grant that this wasn't helped by the fact
> > the gcc x86 folks also couldnt read the pentium pro manual correctly.
>
> One corner case where emulation would IMHO make sense would be CMPXCHG8.
> It would allow to do efficient inline mutexes in pthreads, and hit the
> emulation only on 386/486. cpu feature flag checking is unfortunately
> not an option normally for inline code.
>
> -Andi (who would have already done it if he had an 486/386 to test)
Do you want one? I have elonex, which is 486sx, small and quiet (needs
NFS root). But I'd want it back eventually. Or I might be able to get
you some 386...
Pavel
--
Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.
next prev parent reply other threads:[~2002-01-18 16:47 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <m26669olcu.fsf@goliath.csn.tu-chemnitz.de.suse.lists.linux.kernel>
[not found] ` <E16Oocq-0005tX-00@the-village.bc.nu.suse.lists.linux.kernel>
2002-01-11 9:54 ` [Q] Looking for an emulation for CMOV* instructions Andi Kleen
2002-01-12 6:31 ` Pavel Machek [this message]
2002-01-12 7:52 ` H. Peter Anvin
2002-01-12 10:48 Adam J. Richter
2002-01-12 11:25 ` David Weinehall
2002-01-12 13:18 ` Brian Gerst
2002-01-12 20:43 ` H. Peter Anvin
[not found] <200201111845.g0BIjS2318104@saturn.cs.uml.edu>
2002-01-12 9:00 ` willy tarreau
2002-01-12 18:57 ` Alan Cox
-- strict thread matches above, loose matches on Subject: below --
2002-01-11 9:25 willy tarreau
2002-01-11 17:55 ` Ronald Wahl
[not found] <fa.eln67tv.a4io16@ifi.uio.no>
[not found] ` <fa.gp0gofv.1p4se16@ifi.uio.no>
2002-01-11 8:12 ` Giacomo Catenazzi
2002-01-10 23:08 Ronald Wahl
2002-01-10 23:28 ` Alan Cox
2002-01-11 0:08 ` Ronald Wahl
2002-01-11 0:26 ` Alan Cox
2002-01-11 0:39 ` Ronald Wahl
2002-01-11 0:54 ` Alan Cox
2002-01-11 1:09 ` Martin Eriksson
2002-01-11 1:42 ` Timothy Covell
2002-01-11 2:16 ` Alan Cox
2002-01-11 18:24 ` Ronald Wahl
2002-01-11 22:18 ` Richard Henderson
2002-01-11 23:07 ` Alan Cox
2002-01-11 23:26 ` Albert D. Cahalan
2002-01-11 23:40 ` Alan Cox
2002-01-16 15:18 ` Jamie Lokier
2002-01-16 16:16 ` Richard B. Johnson
2002-01-16 17:48 ` Ronald Wahl
2002-01-16 17:30 ` Dave Jones
2002-01-17 11:54 ` Maciej W. Rozycki
2002-01-11 19:59 ` Hans-Peter Jansen
2002-01-11 20:05 ` Ronald Wahl
2002-01-11 23:19 ` Alan Cox
2002-01-12 6:27 ` Pavel Machek
2002-04-12 20:48 ` H. Peter Anvin
2002-01-12 6:34 ` Pavel Machek
2002-01-18 17:38 ` David Woodhouse
2002-01-18 22:01 ` Pavel Machek
2002-01-11 23:25 ` Alistair Riddell
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20020112063136.E511@toy.ucw.cz \
--to=pavel@suse.cz \
--cc=ak@suse.de \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox