commit 772f0fde1c6f5dbdd741b8c79e626a97304ebc7e
author George Steed <george.steed@arm.com> Tue Apr 23 19:28:02 2024
committer Frank Barchard <fbarchard@chromium.org> Mon Sep 16 04:35:47 2024
tree 4c7e7010de1e06f750ec6f3ebc42071ef39fb589
parent 2dfb84b311c064dd0d2872c2f94607cf8d0aaf9c

[AArch64] Use full Neon vectors in RGB565To{ARGB,UV,Y}Row_NEON

The existing code only makes use of half of the vector lanes in the
RGB565TOARGB macro. In the RGB565To{ARGB,Y} kernels we can load more
data to allow using full vectors, adjusting the "any" kernel macros to
match. For the RGB565ToUVRow kernel we already have plenty of data but
currently call the macro twice as much as needed, so refactor the code
to only call it once but operating with full vectors instead.

Reduction in runtimes observed for selected micro-architectures:

            | RGB565ToARGBRow | RGB565ToUVRow | RGB565ToYRow
 Cortex-A53 |          -35.2% |        -28.8% |       -31.1%
 Cortex-A55 |          -32.5% |        -34.4% |       -42.9%
Cortex-A510 |          -21.6% |        -27.7% |       -47.2%
 Cortex-A76 |           -0.9% |        -42.0% |       -21.4%
Cortex-A720 |          -28.6% |        -37.2% |       -26.1%
  Cortex-X1 |           -3.2% |        -42.3% |       -23.4%

Bug: b/42280945
Change-Id: Ib1f68e5b87cc05a1485bbe96cfef87e6ac119fc3
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/5790974
Reviewed-by: Justin Green <greenjustin@google.com>
Reviewed-by: Frank Barchard <fbarchard@chromium.org>