[x264-devel] PATCH: frame_init_lowres_core_altivec

David Wolstencroft wolstencroft at alum.rpi.edu
Sun May 31 00:41:40 CEST 2009


Hello,

Please find the attached patch for frame_init_lowres_core_altivec

I would appreciate any review you guys can give, as well as anyone who  
can test the compile on a linux distribution.

Speed gains as follows:

ticks:
lowres_init_c: 8374
lowres_init_altivec: 375

Below with a patched checkasm with CHUD for cycle accurate counts:
lowres_init_c: 286981
lowres_init_altivec: 12822

Using the cycle accurate counts, the altivec version shows a 22.38x  
speed increase over plain C

- David

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