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Date:   Fri, 6 Oct 2000 02:43:37 +0200
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,
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Subject: Re: load_unaligned() and "uld" instruction
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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
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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.