quoted

We already have SMT, ICACHE_SNOOP and ALTIVEC feature bits, so it  
probably
makes sense to stay in the ARCH_2_05 direction. Unfortunately it  
might
be tricky to rename the old defines now due to userland exposure.

I guess Cell breaks all this logic though. Which PPC base version  
does
it implement?

The Cell Broadband Engine Architecture in theory is 2.03 and also  
mandates

The docs (for example, "CBE_Architecture_v10.pdf") say 2.02.  One  
more reason
to not use those arch version numbers.


Segher