From: Dave Jones <davej@suse.de>
To: Jamie Lokier <lk@tantalophile.demon.co.uk>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Richard Henderson <rth@twiddle.net>,
Ronald Wahl <Ronald.Wahl@informatik.tu-chemnitz.de>,
linux-kernel@vger.kernel.org
Subject: Re: [Q] Looking for an emulation for CMOV* instructions.
Date: Wed, 16 Jan 2002 18:30:20 +0100 [thread overview]
Message-ID: <20020116183020.A12977@suse.de> (raw)
In-Reply-To: <20020111141850.A9873@twiddle.net> <E16PAld-0000c9-00@the-village.bc.nu> <20020116151852.B31993@kushida.apsleyroad.org>
In-Reply-To: <20020116151852.B31993@kushida.apsleyroad.org>; from lk@tantalophile.demon.co.uk on Wed, Jan 16, 2002 at 03:18:52PM +0000
On Wed, Jan 16, 2002 at 03:18:52PM +0000, Jamie Lokier wrote:
> > > What's the point of optimizing an IF to a cmov if I have
> > > to insert another IF to see if I can use cmov?
> > I've always wondered. Intel made the instruction optional yet there isnt
> > an obvious way to do runtime fixups on it
> Yes there is -- emulation! :-)
Too much overhead to be of practical use..
--
| Dave Jones. http://www.codemonkey.org.uk
| SuSE Labs
next prev parent reply other threads:[~2002-01-16 17:32 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-10 23:08 [Q] Looking for an emulation for CMOV* instructions 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 [this message]
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
[not found] <fa.eln67tv.a4io16@ifi.uio.no>
[not found] ` <fa.gp0gofv.1p4se16@ifi.uio.no>
2002-01-11 8:12 ` Giacomo Catenazzi
-- 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] <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 ` Andi Kleen
2002-01-12 6:31 ` Pavel Machek
2002-01-12 7:52 ` 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
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
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