On Tue, Nov 08, 2016 at 11:00:29AM +0100, Goswin von Brederlow wrote:
> What I don't get is why this ihappens only on ppc64le. For it to
> consistently return 0 there has to be some check in there for negative
> values. But that check is only present in some specialized ppc64le
> code? Seems like something the generic code for all archs should
> already have.
> 
> Just out of interest: So what's so special about ppc64le that checking
> for negatives is present just there?

Undefined behaviour means anything could happen.  Attached are the
ppc64 & ppc64le disassemblies for this function if you want to have a
look.

Rich.