On Saturday 20 December 2008 00:12:08 ext Siarhei Siamashka wrote:
[...]
> We had a talk with Jaska Uimonen here, and now I'm kind of delegated to
> finish the work on this filtering function for SBC encoder (including the
> final addition of ARM assembly optimizations).  He provided me with his
> last variant of code, which contains some more optimizations to reduce the
> number of operations and also loops unrolling. I will add his changes to
> the patch on next iteration.
>
> Now the question is how to best integrate a fixed filtering function to git
> repository? If I just continue adding changes to the patch in order to make
> it a faster, it will be also not so obvious to see how we got to these code
> transformations just from the commit log.

Next iteration done.  Added support for 4 subbands, number of arithmetic
operations reduced (but without loop unrolling for better code readability),
precision improved for both 16-bit and 32-bit fixed point, 'neginv' macro is
now more portable and faster. The rest is in the code comments.


Best regards,
Siarhei Siamashka