Add sse2-optimized update_cdf function.
This only works for length 4 cdfs.
Cannonlake benchmarks: msac_update_cdf_c: 84.5 msac_update_cdf_sse2: 41.6
Edited by Thomas Daede
This only works for length 4 cdfs.
Cannonlake benchmarks: msac_update_cdf_c: 84.5 msac_update_cdf_sse2: 41.6
VideoLAN code repository instance