Re: [PATCH] atomic_dec_if_positive sign extension fix

It also avoids clobbering the carry, you don't know whether a future
version of GCC will require explicit clobbers for the carry. For now
they are useless: you can specify "xer" in the clobber list AFAIR but
no pattern can be split between setters and users of the carry in the
machine description.

You can specify "cc" in the clobber list already, don't use
"xer" unless you're clobbering something else in the XER.


Segher