Re: Binary Compatibility of various flavors of PPC

But as Matt said (and later reminded me) the 405 has errata that is 405
specific, and the 8xx and 403 half smaller cacheline size.  So anything
statically linked may not operator correctly....  but yes, if you switch the
whole of userspace to soft-floating point then "in general" they should all be
compatable.

I don't know if gcc generates any code that tweaks with the cache, but
if you
only consider applications/libraries that use assembly routines to
control the
cache then it should be possible to convert the assembly code to assume
16-byte
cachelines for all processors. That should work for processors with
larger
cachelines, with a performance penalty. I use a patch for glibc-2.1.3
that does
exactly that. But I've only used it on 8xx-series, so correct me if I'm
wrong.

Btw - does someone know what the status is for recent glibc versions -
do they work for 8xx out of the box?

Thanks /

magnus

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