Saving to 32 bits of GPRs in signal context

[Segher Boessenkool]

> But we can't do that any more since the architecture specifically
> allows for the 'upper bits' not to have valid data in them.

That's not PowerPC, that's BookE ;-P  If what you're
saying is true in the 2.03 POWER ISA, even for server
class implementations, that would be very unfortunate.

Or perhaps you misread, there are a few insns that
have undefined results in the high half word.  Could
you give a reference please?

If you mean Book I 1.5.2, that is for embedded class
(i.e., BookE) CPUs only.


Segher