[PATCH v2.1] Use saturated arithmetic for overflow detection.

[Ondřej Bílka]

On Tue, Dec 03, 2013 at 12:29:50PM -0800, Paul Eggert wrote:
> On 12/03/2013 09:53 AM, Joseph S. Myers wrote:
> > Even for the normal case where one argument is constant?
> 
> I suppose you're right, it may be better to do that case inline.
> Something like this, say:
> 
> #define HAVE___INT128 1  /* This should be configured.  */
>
Richard, a quick googling found your patch for qemu. Ok to adapt that?

http://lists.nongnu.org/archive/html/qemu-devel/2013-01/msg05387.html