From: Ralf Baechle <ralf@linux-mips.org>
To: "Maciej W. Rozycki" <macro@linux-mips.org>
Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp>, linux-mips@linux-mips.org
Subject: Re: [PATCH] TX49 MFC0 bug workaround
Date: Thu, 2 Feb 2006 16:56:56 +0000 [thread overview]
Message-ID: <20060202165656.GC17352@linux-mips.org> (raw)
In-Reply-To: <Pine.LNX.4.64N.0602021636380.11727@blysk.ds.pg.gda.pl>
On Thu, Feb 02, 2006 at 04:38:37PM +0000, Maciej W. Rozycki wrote:
> Date: Thu, 2 Feb 2006 16:38:37 +0000 (GMT)
> From: "Maciej W. Rozycki" <macro@linux-mips.org>
> To: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
> Cc: linux-mips@linux-mips.org, ralf@linux-mips.org
> Subject: Re: [PATCH] TX49 MFC0 bug workaround
> Content-Type: TEXT/PLAIN; charset=US-ASCII
>
> On Fri, 3 Feb 2006, Atsushi Nemoto wrote:
>
> > Workaround: mask EXL bit of the result or place a nop before mfc0.
> [...]
> > @@ -55,8 +56,13 @@ __asm__ (
> > " di \n"
> > #else
> > " mfc0 $1,$12 \n"
> > +#if TX49XX_MFC0_WAR && defined(MODULE)
> > + " ori $1,3 \n"
> > + " xori $1,3 \n"
> > +#else
> > " ori $1,1 \n"
> > " xori $1,1 \n"
> > +#endif
> > " .set noreorder \n"
> > " mtc0 $1,$12 \n"
> > #endif
>
> Hmm, wouldn't that "nop" alternative be simpler?
Simpler maybe - but this variant has zero runtime overhead.
Ralf
next prev parent reply other threads:[~2006-02-02 16:51 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-02 16:34 [PATCH] TX49 MFC0 bug workaround Atsushi Nemoto
2006-02-02 16:38 ` Maciej W. Rozycki
2006-02-02 16:56 ` Ralf Baechle [this message]
2006-02-02 17:04 ` Atsushi Nemoto
2006-02-02 17:21 ` Atsushi Nemoto
2006-02-02 17:24 ` Ralf Baechle
2006-02-03 2:10 ` Atsushi Nemoto
2006-02-03 10:17 ` Maciej W. Rozycki
2006-02-03 14:44 ` Ralf Baechle
2006-02-06 9:36 ` Atsushi Nemoto
2006-02-06 23:22 ` Ralf Baechle
2006-02-03 2:26 ` Sergei Shtylylov
2006-02-03 2:50 ` Atsushi Nemoto
2006-02-02 16:46 ` Ralf Baechle
2006-02-02 18:46 ` Sergei Shtylylov
2006-02-02 22:11 ` Ralf Baechle
2006-02-03 1:17 ` Atsushi Nemoto
2006-02-03 2:12 ` Sergei Shtylylov
2006-02-03 2:22 ` Atsushi Nemoto
2006-02-07 15:32 ` Sergei Shtylylov
2006-02-07 15:32 ` Sergei Shtylylov
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=20060202165656.GC17352@linux-mips.org \
--to=ralf@linux-mips.org \
--cc=anemo@mba.ocn.ne.jp \
--cc=linux-mips@linux-mips.org \
--cc=macro@linux-mips.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.