tree ef0a7c8f01fe30dea0366edcd093f13ee91653be
parent 8c4dc84b4c2fa613ec22e8ee8d17896a8dce435a
author Jonathan Wright <jonathan.wright@arm.com> 1682440727 +0100
committer James Zern <jzern@google.com> 1683228025 +0000

Refactor Neon compound convolution functions 1/7

Refactor and tidy up av1_dist_wtd_convolve_y_neon and its associated
helper functions for both 6-tap and 8-tap filters:

1) Use a rounding-right-shift-and-accumulate instruction instead of
   separately adding both 'vert_const' and 'round_offset' constants.
2) Return unsigned types from the convolution kernel inline functions
   - removing the need for a lot of bulky result vector type casting.

Change-Id: Ie2a66bd6cbd71441ccd2fea12728e1f9dd4a3d07