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fuchsia / third_party / libyuv / 00886670bbed1e939c09e22e0b9ec067cf93c609
commit00886670bbed1e939c09e22e0b9ec067cf93c609[log] [tgz]
authorGeorge Steed <george.steed@arm.com>Thu May 16 17:12:28 2024 +0100
committerFrank Barchard <fbarchard@chromium.org>Mon Sep 16 04:27:39 2024 +0000
tree0b92db3832b6128caf1de9795786d0c85a951af6
parent4620f1705822fd6ab99939f43ce63099bd3d9ae0 [diff]
[AArch64] Avoid LD4/ST2 in ScaleARGBRowDown2_NEON

Use separate permute instructions to avoid using LD4/ST2 as these
instructions are known to be slow on some micro-architectures.

Observed reduction in runtimes compared to the existing Neon code:

 Cortex-A55: -12.4%
Cortex-A510: -44.8%
Cortex-A520: -31.1%
 Cortex-A76: -55.3%
Cortex-A715: -63.7%
Cortex-A720: -62.3%
  Cortex-X1: -79.0%
  Cortex-X2: -78.9%
  Cortex-X3: -79.6%
  Cortex-X4: -59.8%

Co-authored-by: Cosmina Dunca <cosmina.dunca@arm.com>
Bug: libyuv:976
Change-Id: I33cf27ae5e16c1ce62f1f343043e6bd9fca92558
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/5790971
Reviewed-by: Justin Green <greenjustin@google.com>
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
1 file changed
tree: 0b92db3832b6128caf1de9795786d0c85a951af6
  1. build_overrides/
  2. docs/
  3. include/
  4. infra/
  5. riscv_script/
  6. source/
  7. tools_libyuv/
  8. unit_test/
  9. util/
  10. .clang-format
  11. .gitignore
  12. .gn
  13. .vpython
  14. .vpython3
  15. Android.bp
  16. Android.mk
  17. AUTHORS
  18. BUILD.gn
  19. CM_linux_packages.cmake
  20. CMakeLists.txt
  21. codereview.settings
  22. DEPS
  23. DIR_METADATA
  24. download_vs_toolchain.py
  25. libyuv.gni
  26. libyuv.gyp
  27. libyuv.gypi
  28. LICENSE
  29. linux.mk
  30. OWNERS
  31. PATENTS
  32. PRESUBMIT.py
  33. public.mk
  34. pylintrc
  35. README.chromium
  36. README.md
  37. winarm.mk
README.md

libyuv is an open source project that includes YUV scaling and conversion functionality.

  • Scale YUV to prepare content for compression, with point, bilinear or box filter.
  • Convert to YUV from webcam formats for compression.
  • Convert to RGB formats for rendering/effects.
  • Rotate by 90/180/270 degrees to adjust for mobile devices in portrait mode.
  • Optimized for SSSE3/AVX2 on x86/x64.
  • Optimized for Neon on Arm.
  • Optimized for MSA on Mips.
  • Optimized for RVV on RISC-V.

Development

See Getting started for instructions on how to get started developing.

You can also browse the docs directory for more documentation.