tree c6a42fe28f52e26e13f33f5a1321adb562d8e49b
parent 341adedfb04c3e3f8544c1fb6f36a027c2fd50e6
author Jonathan Wright <jonathan.wright@arm.com> 1680737928 +0100
committer James Zern <jzern@google.com> 1680805388 +0000

Optimize 4D Neon reduction for 4xh and 8xh SAD4D blocks

Add a 4D reduction function operating on uint16x8_t vectors and use
it to optimize the final reduction in standard bitdepth 4xh and 8xh
SAD4D computations. Similar 4D reduction optimizations have already
been implemented for all other standard bitdepth block sizes.[1]

[1] https://aomedia-review.googlesource.com/c/aom/+/170281

Change-Id: I33ff7b8c6a232e748972937da3c15ea25f255a1e