[FFmpeg-devel] libavutil: optimize twofish cipher

[supraja reddy]

Hello,

I have attached a patch with optimization for twofish. Please let me know
if any further changes required.

Following are the results for crypto_bench after optimization.

lavu       TWOFISH      size: 1048576  runs:   1024  time:   18.799 +- 0.132
gcrypt     TWOFISH      size: 1048576  runs:   1024  time:   25.643 +- 0.096
tomcrypt   TWOFISH      size: 1048576  runs:   1024  time:   18.372 +- 0.082

Thanks,
Supraja
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