tree c162ca0e96cde53a9e1f1e297e86004072584472
parent 2ffbeae715926e1cc7774e523b3b116d5284d7a9
author Yunqing Wang <yunqingwang@google.com> 1564766732 -0700
committer Yunqing Wang <yunqingwang@google.com> 1564788290 +0000

Remove unnecessary sigmoid calculation

The sigmoid operation isn't necessary in tx_size split score
calculation, and is removed. The minor quality change was caused
by approximation of ml_tx_split_thresh.

midres set borg test result:
         avg_psnr: ovr_psnr: ssim:
speed 1:  -0.001   -0.008   -0.024
speed 3:   0.010    0.009   -0.009

Average speed 1 speedup over midres set is 0.4%(instruction count
result).

STATS_CHANGED

Change-Id: Ib77e3211319ead957b4b47e7775c47350d7f5537