> > uninlining the code is too high a cost.
>
> I question that. Athlon does branch prediction on call targets, function
> calls are cheap. 3dnow saves 25%-50% of cycles on a copy. How many function
> calls can be paid for with 1000 cycles or so?
>
> My patch still inlines the standard string const_memcpy for the case of
> small known length.
We have a very large number of memcpy's of unknown short length (often in
interrupts) that are close to branches. A lot of
if(foo==NULL)
return
memcpy(..
stuff for example.
Im more than happy for someone to do the benches and prove me wrong
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This archive was generated by hypermail 2b29 : Wed Feb 07 2001 - 21:00:12 EST