From: Thiemo Seufer <ths@networkno.de>
To: "Maciej W. Rozycki" <macro@linux-mips.org>
Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp>,
u1@terran.org, linux-mips@linux-mips.org
Subject: Re: MIPS checksum bug
Date: Fri, 19 Sep 2008 18:35:38 +0200 [thread overview]
Message-ID: <20080919163538.GA22497@networkno.de> (raw)
In-Reply-To: <Pine.LNX.4.55.0809191656030.29711@cliff.in.clinika.pl>
Maciej W. Rozycki wrote:
> On Sat, 20 Sep 2008, Atsushi Nemoto wrote:
>
> > @@ -229,6 +239,9 @@ LEAF(csum_partial)
> >
> > /* Still a full word to go */
> > ulw t1, (src)
> > +#ifdef USE_DOUBLE
> > + add t1, zero /* clear upper 32bit */
> > +#endif
> > PTR_ADDIU src, 4
> > ADDC(sum, t1)
> >
>
> Unfortunately you can't zero-extend with a single instruction (you can
> use a single sll(v) to sign-extend), unless the R2 ISA provides some
> suitable oddity (which I haven't checked).
AFAIR dext can do this for MIPS64 R2.
Thiemo
next prev parent reply other threads:[~2008-09-19 16:35 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <072748C6-07A9-4167-A8A5-80D0F7D9C784@darkforest.org>
2008-09-17 5:15 ` MIPS checksum bug Bryan Phillippe
2008-09-17 10:40 ` Maciej W. Rozycki
2008-09-17 13:23 ` Atsushi Nemoto
2008-09-17 14:46 ` Maciej W. Rozycki
2008-09-17 15:27 ` Atsushi Nemoto
2008-09-17 18:21 ` Maciej W. Rozycki
2008-09-18 22:07 ` Ralf Baechle
2008-09-19 10:12 ` Maciej W. Rozycki
2008-09-19 11:23 ` Ralf Baechle
2008-09-19 11:47 ` [PATCH] MIPS checksum fix Ralf Baechle
2008-09-19 12:07 ` Ralf Baechle
2008-09-19 12:15 ` Maciej W. Rozycki
2008-09-19 14:09 ` Atsushi Nemoto
2008-09-19 15:02 ` Maciej W. Rozycki
2008-09-20 15:09 ` Ralf Baechle
2008-09-23 21:52 ` Bryan Phillippe
2008-09-23 22:06 ` Ralf Baechle
2008-09-29 15:28 ` Atsushi Nemoto
2008-09-19 12:26 ` MIPS checksum bug Maciej W. Rozycki
2008-09-19 16:04 ` Bryan Phillippe
2008-09-17 22:52 ` Bryan Phillippe
2008-09-18 16:17 ` Atsushi Nemoto
2008-09-19 1:14 ` Ralf Baechle
2008-09-19 15:43 ` Atsushi Nemoto
2008-09-19 16:09 ` Maciej W. Rozycki
2008-09-19 16:35 ` Thiemo Seufer [this message]
2008-09-19 23:18 ` Maciej W. Rozycki
2008-09-20 0:13 ` Ralf Baechle
2008-09-20 13:45 ` Atsushi Nemoto
2008-09-18 4:43 ` Bryan Phillippe
2008-09-18 10:06 ` Maciej W. Rozycki
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=20080919163538.GA22497@networkno.de \
--to=ths@networkno.de \
--cc=anemo@mba.ocn.ne.jp \
--cc=linux-mips@linux-mips.org \
--cc=macro@linux-mips.org \
--cc=u1@terran.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.