From: Segher Boessenkool <segher@kernel•crashing.org>
To: Gabriel Paubert <paubert@iram•es>
Cc: olof@lixom•net, linuxppc-dev@ozlabs•org,
Paul Mackerras <paulus@samba•org>
Subject: Re: [PATCH] atomic_dec_if_positive sign extension fix
Date: Mon, 15 Jan 2007 17:01:12 +0100 [thread overview]
Message-ID: <4391e3fc8335446ddeedecb5670d4a00@kernel.crashing.org> (raw)
In-Reply-To: <20070115085557.GA4943@iram.es>
> It also avoids clobbering the carry, you don't know whether a future
> version of GCC will require explicit clobbers for the carry. For now
> they are useless: you can specify "xer" in the clobber list AFAIR but
> no pattern can be split between setters and users of the carry in the
> machine description.
You can specify "cc" in the clobber list already, don't use
"xer" unless you're clobbering something else in the XER.
Segher
next prev parent reply other threads:[~2007-01-15 16:00 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-14 22:55 [PATCH] atomic_dec_if_positive sign extension fix Robert Jennings
2007-01-14 23:09 ` Paul Mackerras
2007-01-14 23:20 ` Olof Johansson
2007-01-14 23:32 ` Segher Boessenkool
2007-01-14 23:43 ` Segher Boessenkool
2007-01-15 8:55 ` Gabriel Paubert
2007-01-15 16:01 ` Segher Boessenkool [this message]
2007-01-16 4:28 ` Gabriel Paubert
2007-01-16 8:36 ` Segher Boessenkool
2007-01-16 18:16 ` [PATCH][v2] " Robert Jennings
2007-01-16 20:08 ` Gabriel Paubert
2007-01-17 16:50 ` [PATCH][v3] " Robert Jennings
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