From: Alan Modra <amodra@gmail.com>
To: Anton Blanchard <anton@samba.org>
Cc: linuxppc-dev@ozlabs.org, David Woodhouse <dwmw2@infradead.org>,
viro@zeniv.linux.org.uk
Subject: Re: [PATCH] powerpc: provide __bswapdi2
Date: Mon, 13 May 2013 16:50:13 +0930 [thread overview]
Message-ID: <20130513072013.GD5221@bubble.grove.modra.org> (raw)
In-Reply-To: <20130513164819.1c9331b9@kryten>
On Mon, May 13, 2013 at 04:48:19PM +1000, Anton Blanchard wrote:
> On Fri, 10 May 2013 22:18:27 +0100
> David Woodhouse <dwmw2@infradead.org> wrote:
>
> > From: David Woodhouse <David.Woodhouse@intel.com>
> >
> > Some versions of GCC apparently expect this to be provided by libgcc.
>
> Thanks Dave. We were discussing this with Alan Modra and he doesn't
> think the 64bit target should ever emit a call to __bswapdi2. Did you
> only see it on 32bit, or 64bit as well?
>
> Alan: I notice Dave is adding calls to __builtin_bswap, perhaps some
> versions of the 64bit compiler did emit __bswapdi2 calls for that.
I did a little digging, and it looks like gcc-4.4 will emit __bswapdi2
calls. Support in rs6000.md appeared 2009-06-25.
--
Alan Modra
Australia Development Lab, IBM
next prev parent reply other threads:[~2013-05-13 7:20 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-10 21:18 [PATCH] powerpc: provide __bswapdi2 David Woodhouse
2013-05-13 6:48 ` Anton Blanchard
2013-05-13 7:20 ` Alan Modra [this message]
2013-05-13 10:27 ` David Woodhouse
2013-05-13 16:47 ` Segher Boessenkool
2013-05-13 7:09 ` Michael Neuling
2013-05-13 7:20 ` [PATCH v2] " Michael Neuling
2013-05-13 7:33 ` [PATCH] " Gabriel Paubert
2013-05-13 10:23 ` [PATCH v3] " Michael Neuling
2013-05-13 10:33 ` [PATCH] " David Woodhouse
2013-05-13 10:38 ` David Woodhouse
2013-05-13 10:51 ` Joakim Tjernlund
2013-05-13 11:12 ` Joakim Tjernlund
2013-05-13 13:12 ` Gabriel Paubert
2013-05-13 16:55 ` Segher Boessenkool
2013-05-14 1:09 ` Stephen Rothwell
2013-05-14 1:25 ` Michael Neuling
2013-05-14 6:59 ` David Woodhouse
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