libffi PowerPC64 ELFv1 fp arg fixes

[Alan Modra]

On Fri, May 04, 2018 at 06:02:27AM -0500, Segher Boessenkool wrote:
> On Fri, May 04, 2018 at 07:40:20PM +0930, Alan Modra wrote:
> > The attached patch has been accepted into upstream libffi.  It fixes
> > powerpc64-linux problems shown up by Bruno Haible's new libffi
> > testsuite tests.  Bootstrapped and regression tested powerpc64-linux
> > and powerpc64le-linux.  OK mainline and active branches?
> 
> That looks fine, and since it is in upstream it counts as obvious I
> think?
> 
> Is there a test for this, btw?

https://github.com/libffi/libffi/tree/master/testsuite/libffi.bhaible
I'm guessing this could be imported but I'm not sure of the politics.

powerpc64 failed test-call.c DGTEST=12, DGTEST=13, DGTEST=55,
DGTEST=56, DGTEST=57 and DGTEST=68, and corresponding tests in
test-callback.c.

-- 
Alan Modra
Australia Development Lab, IBM