[RFA] ppc: include register numbers in gdbarch_tdep structure.

[Mark Kettenis]

Andrew Cagney <ac131313@cygnus.com> writes:

> Based on the pains I'm experiencing with going through trying to get 
> some MMX changes for x86 in a state where I can submit them, I suspect 
> it is the better of the alternatives.
> 
> The x86 has a mix and that is just confusing.  I don't know what can 
> change and what can't change and what secret relationships there are 
> between the constants and variables.

I'm working on that.  Unfortunately I have to improve the
documentation a bit.

Mark