[opus] Bug fix in celt_lpc.c and some xcorr_kernel optimizations

[John Ridges]

Hi JM,

I have no doubt that Mr. Zanelli's NEON code is faster, since hand tuned 
assembly is bound to be faster than using intrinsics. However I notice 
that his code can also read past the y buffer.

Cheers,
--John


On 6/6/2013 9:22 PM, Jean-Marc Valin wrote:
> Hi John,
>
> Thanks for the two fixes. They're in git now. Your SSE version seems to
> also be slightly faster than mine -- probably due the the partial sums.
> As for the NEON code, it would be good to compare the performance with
> the code Aurélien Zanelli posted at
> http://darkosphere.fr/public/0002-Add-optimized-NEON-version-of-celt_fir-celt_iir-and-.patch
>
> Cheers,
>
> 	Jean-Marc
>
>