[PATCH] powerpc: provide __bswapdi2

[Alan Modra]

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 at infradead.org> wrote:
> 
> > From: David Woodhouse <David.Woodhouse at 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