1. 09 Dec, 2015 1 commit
    • Ganesh Ajjanagadde's avatar
      avcodec/aacsbr_tablegen: always initialize tables at runtime · cb93df0d
      Ganesh Ajjanagadde authored
      This gets rid of virtually useless hardcoded tables hackery. The reason
      it is useless is that a 320 element lut is anyway placed regardless of
      --enable-hardcoded-tables, from which all necessary tables are trivially
      derived at runtime at very low cost:
      
      sample benchmark (x86-64, Haswell, GNU/Linux, single run is really
      what is relevant here since looping drastically changes the bench). Fluctuations
      are on the order of 10% for the single run test:
      39400 decicycles in aacsbr_tableinit,       1 runs,      0 skips
      25325 decicycles in aacsbr_tableinit,       2 runs,      0 skips
      18475 decicycles in aacsbr_tableinit,       4 runs,      0 skips
      15008 decicycles in aacsbr_tableinit,       8 runs,      0 skips
      13016 decicycles in aacsbr_tableinit,      16 runs,      0 skips
      12005 decicycles in aacsbr_tableinit,      32 runs,      0 skips
      11546 decicycles in aacsbr_tableinit,      64 runs,      0 skips
      11506 decicycles in aacsbr_tableinit,     128 runs,      0 skips
      11500 decicycles in aacsbr_tableinit,     256 runs,      0 skips
      11183 decicycles in aacsbr_tableinit,     509 runs,      3 skips
      
      Tested with FATE with/without --enable-hardcoded-tables.
      Reviewed-by: 's avatarRostislav Pehlivanov <atomnuker@gmail.com>
      Signed-off-by: 's avatarGanesh Ajjanagadde <gajjanagadde@gmail.com>
      cb93df0d
  2. 20 Jul, 2015 1 commit
  3. 06 Sep, 2014 1 commit