From: Ralf Baechle <ralf@oss.sgi.com>
To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Cc: Jun Sun <jsun@mvista.com>, "Kevin D. Kissell" <kevink@mips.com>,
Dominic Sweetman <dom@algor.co.uk>,
linux-mips@oss.sgi.com, linux-mips@fnet.fr
Subject: Re: load_unaligned() and "uld" instruction
Date: Fri, 6 Oct 2000 02:43:37 +0200 [thread overview]
Message-ID: <20001006024337.A3429@bacchus.dhis.org> (raw)
In-Reply-To: <Pine.GSO.3.96.1000927112232.25150A-100000@delta.ds2.pg.gda.pl>; from macro@ds2.pg.gda.pl on Wed, Sep 27, 2000 at 12:06:31PM +0200
On Wed, Sep 27, 2000 at 12:06:31PM +0200, Maciej W. Rozycki wrote:
> Please don't. Gcc already has means to generate proper unaligned
> accesses. See include/asm-alpha/unaligned.h for how to achieve them in a
> portable way (i.e. using packed structs) without the problematic inline
> asm.
That's all very nice and guess what - I tried it when I originally wrote
ualigned.h for Linux. Try building the mentioed Alpha code with and older
compiler like egcs 1.0.3a and take a look at it [1]. 23 instructions for
loading a double world - that's just mindboggling.
Ralf
[1] free barf bag on request.
next prev parent reply other threads:[~2000-10-06 0:44 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-09-25 18:48 load_unaligned() and "uld" instruction Jun Sun
2000-09-25 21:16 ` Dominic Sweetman
2000-09-25 21:36 ` Jun Sun
2000-09-25 23:29 ` Ralf Baechle
2000-09-26 6:22 ` Kevin D. Kissell
2000-09-26 6:22 ` Kevin D. Kissell
2000-09-26 9:08 ` Dominic Sweetman
2000-09-26 9:08 ` Dominic Sweetman
2000-09-29 17:22 ` Ralf Baechle
2000-10-09 14:49 ` Dominic Sweetman
2000-09-26 18:04 ` Jun Sun
2000-09-27 10:06 ` Maciej W. Rozycki
2000-10-06 0:43 ` Ralf Baechle [this message]
2000-10-06 9:54 ` Maciej W. Rozycki
2000-10-06 16:21 ` Ralf Baechle
2000-10-05 12:13 ` Ralf Baechle
2000-10-06 1:11 ` Jun Sun
2000-10-05 19:41 ` Kevin D. Kissell
2000-10-05 19:41 ` Kevin D. Kissell
2000-10-06 4:32 ` Jun Sun
2000-10-05 22:10 ` Kevin D. Kissell
2000-10-05 22:10 ` Kevin D. Kissell
2000-10-06 5:53 ` Jun Sun
2000-10-05 23:14 ` Kevin D. Kissell
2000-10-05 23:14 ` Kevin D. Kissell
2000-10-06 16:32 ` Ralf Baechle
2000-10-07 1:35 ` Jun Sun
2000-10-06 22:26 ` Ralf Baechle
2000-10-06 16:28 ` Ralf Baechle
2000-10-07 1:24 ` Jun Sun
2000-10-06 20:46 ` Kevin D. Kissell
2000-10-06 20:46 ` Kevin D. Kissell
2000-10-07 7:16 ` Jun Sun
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