• Johann's avatar
    vpx_comp_avg_pred: sse2 optimization · 28a86221
    Johann authored
    Provides over 15x speedup for width > 8.
    
    Due to smaller loads and shifting for width == 8 it gets about 8x
    speedup.
    
    For width == 4 it's only about 4x speedup because there is a lot of
    shuffling and shifting to get the data properly situated.
    
    BUG=webm:1390
    
    Change-Id: Ice0b3dbbf007be3d9509786a61e7f35e94bdffa8
    28a86221
variance.c 26.3 KB