[ia64-abi] Issue reminder

[Matt Austern]

Ulrich Drepper writes:
 > dehnert at baalbek.engr.sgi.com (Jim Dehnert) writes:
 > 
 > > So again, I propose that we treat:
 > > [...]
 > > 	__float80 as a synonym for long double
 > 
 > If you want to the ABI be universally usable this is bad.  On SPARC,
 > PPC, and many other archs __float128 would be long double.  There is
 > no consistency.

Parts of the ABI are universally usable, other parts are very specific 
to IA64.  So far we haven't tried to separate out those parts, since
our explicit purpose has been defining an IA64 ABI.

I agree, though, once we're done it would be very interesting to
isolate the platform-dependent stuff and turn the IA64 ABI into a
family of ABIs.