[PATCH] include: introduce byte counting macros.

[Matthias Hopf]

On Jun 16, 09 13:43:55 -0400, Adam Jackson wrote:
> > To my experience they are not as efficient. Even with today's compilers
> > :-(
> I'd love to see an existence proof for this.

Because we all disliked the use of macros in the radeon driver in the
acceleration routines, we had all acceleration macros for radeonhd first
coded up as static inline functions, but switched over to macros because
of something like a 30% performance impact (AFAIR, it definitely was not
negligible).

Later I discussed this with Richard Guenther (one of the major gcc
developers, who happens to work here at SuSE), and he basically agreed
that gcc is by far not optimal with respect to optimizing static inline
functions yet.

That's as far as a proof as I can come by. Luc probably remembers the
git commits (if there were any, and we didn't only commit the optimized
version), because he coded that stuff. gcc version was 4.2 AFAIR.

Matthias

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