From: Grant Grundler <grundler@parisc-linux.org>
To: Joel Soete <soete.joel@tiscali.be>
Cc: parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] Re: pa_memcpy: 2 small question
Date: Mon, 10 Jan 2005 10:17:10 -0700 [thread overview]
Message-ID: <20050110171710.GC16091@colo.lackof.org> (raw)
In-Reply-To: <41DE941900000C83@mail-5-bnl.tiscali.it>
On Mon, Jan 10, 2005 at 06:12:24PM +0100, Joel Soete wrote:
> well any way if no trap occurs the results is put in %r0: I don't yet well
> understand this usage of %r0 as target reg (excepted for prefetching)?
writes to %r0 are simply discarded.
It's a handy target when we don't care about the result since
it will not cause any interlocks with previous or succesive instructions.
grant
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next prev parent reply other threads:[~2005-01-10 17:17 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20050105055412.68E06495698@palinux.hppa>
2005-01-05 6:16 ` [parisc-linux] more cpup.c results Grant Grundler
2005-01-05 8:20 ` Joel Soete
2005-01-05 8:40 ` Ryan Bradetich
2005-01-05 16:02 ` Grant Grundler
[not found] ` <20050107095143.GN18497@tausq.org>
2005-01-09 19:07 ` [parisc-linux] pa_memcpy: 2 small question Joel Soete
2005-01-10 0:13 ` [parisc-linux] " Randolph Chung
2005-01-10 8:44 ` Joel Soete
2005-01-10 8:54 ` Randolph Chung
2005-01-10 17:12 ` Joel Soete
2005-01-10 17:17 ` Grant Grundler [this message]
2005-01-10 20:02 ` Stuart Brady
2005-01-11 18:14 ` Joel Soete
2005-01-12 1:49 ` Randolph Chung
2005-02-20 23:44 ` [parisc-linux] revisit copy_user_page_asm microbenchmarks Grant Grundler
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