Google Git
Sign in
fuchsia / third_party / libyuv / f27b983f382be8d49b1d473562918820aa124ed1
commitf27b983f382be8d49b1d473562918820aa124ed1[log] [tgz]
authorGeorge Steed <george.steed@arm.com>Sun May 05 20:51:51 2024 +0100
committerFrank Barchard <fbarchard@chromium.org>Thu Nov 07 18:46:02 2024 +0000
tree1fa88f415d99483dfe7968fbe4361131b23babcd
parentaec4b4e22ef0782601affe488b4f596b0991b127 [diff]
[AArch64] Add SVE2 implementation of DivideRow_16

SVE contains the UMULH instruction which allows us to multiply and take
the high half of the result in a single instruction rather than needing
separate widening multiply and then narrowing shift steps.

Observed reduction in runtime compared to the existing Neon code:

Cortex-A510: -21.2%
Cortex-A520: -20.9%
Cortex-A715: -47.9%
Cortex-A720: -47.6%
  Cortex-X2:  -5.2%
  Cortex-X3:  -2.6%
  Cortex-X4: -32.4%
Cortex-X925:  -1.5%

Bug: b/42280942
Change-Id: I25154699b17772db1fb5cb84c049919181d86f4b
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/5975318
Reviewed-by: Justin Green <greenjustin@google.com>
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
3 files changed
tree: 1fa88f415d99483dfe7968fbe4361131b23babcd
  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/SVE2/SME 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.