[vorbis-dev] vorbis on playstation 2

David Etherton etherton at rockstarsandiego.com
Thu Feb 6 17:29:53 PST 2003

> Interesting.  I turned on _LOW_ACCURACY_ and rebuilt the library and the
> total cycle count for my test case went from 950M cycles to 723M cycles.
> The two sincos lookup tables are 4K each in "full" mode which are likely
> going to thrash the cache.

Tried moving the LUT as-is to scratchpad memory.

Full accuracy: 950->910M
Low accuracy: 723->711M

The low accuracy method is starting to look promising -- seems to me that I
could get away with a 16x16->32 eight-wide MMX multiply to really speed
things up, particularly since there's a muladd unit there too.


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