[PATCH 10/15] powerpc: fixes for instructions not using correct register naming

[Benjamin Herrenschmidt]

On Sat, 2012-06-09 at 08:53 +0200, Andreas Schwab wrote:
> 
> > The macro system we use cannot do that (it will prefix with REG_),
> since
> > both arguments are registers we must use R0 in this case.
> 
> So define a ___PPC_RA0 macro that doesn't do that.

But then we lose the checking for other instructions :-) Unless we start
being nasty and defining a different macro form for RA which can be 0...

I'd rather not go there unless we absolutely have to...

What would be nice also would be if we had a gas option to enforce the
use of % for register names. We'd probably have to struggle a little bit
with gcc inline asm in a case or two though.

Cheers,
Ben.