tree 77adfccd74a29d12fa3c632dcce495c2f1d59bcf
parent 5e9e548df897f3d191c3b41fd6b349f0dadc9a23
author Alex Peterson <petersonab@google.com> 1578082721 -0800
committer James Zern <jzern@google.com> 1579309734 -0800

Add 8-bit NEON impl of ComputeSuperRes.

The upscaling filters are converted to uint8_t type to support vmull_u8.
The range of tap-multiplied Pixels interferes with the sign bit for
int16.

Average 2.5x speedup

PiperOrigin-RevId: 288029963
PiperOrigin-RevId: 288929346
Change-Id: Iad054dbb10251212bef34de31b5a826caba3ac2b