[vorbis-dev] Optimisations

[Timothy J. Wood]

> I don't think this will be too hard at all to set up.  Leave the function  
> names the same, no need for blah_mmx() or blah_3dnow(), rather have  
> directories for each CPU with the equivalent functions in them and have the  
> linker link the right *.o files. 
>  
> I think this might be easier than farting about with macros, or tables that  
> register the functions with pointers at runtime and so on. 

  This would work, obviously, and might be a very tiny bit faster, but it would make it harder to compare results between different versions.  It would also mean you would have to do a lot more binary releases.  If all the functions are present at link time and selectable manually or automatically, then you can ship ONE x86 binary instead of 5 or whatever.

-tim

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