OGRE port to LoongArch64 with LSX SIMD optimizations (tested on Loongson 3B6000M)

[ycsqwan]

Hi everyone,I'm here to share a personal project: a fork of OGRE with added support for the LoongArch64 architecture, including automatic LSX SIMD optimizations for better performance on Loongson CPUs.Repository: https://github.com/ycsqwan/ogre-loongarch64-lsx (branch: loongarch64-lsx)Changes:CMake now detects LoongArch64 and enables -march=loongarch64 and -mlsx flags.

Focused on the OpenGL/GL3+/GLES2 render systems (Vulkan disabled due to current driver maturity on LoongArch).
Successfully built and tested on Loongnix GNU/Linux with a Loongson-3B6000M.The SampleBrowser runs at around 60 FPS in scenes (screenshot in README).

This is just a rough attempt using crude techniques to bring OGRE to an emerging architecture like LoongArch. Any feedback, suggestions for improvement, or testing on other LoongArch hardware would be very helpful!Thanks,
ycsqwan

[paroj]

if your goal was to get this into upstream ogre, it would be better to commit the individual changes on top of upstream master instead of having one "Initial commit: .." with everything.

[paroj]

as far as I can see the changes boil down to:

Code: Select all

cmake -DCMAKE_CXX_FLAGS="-march=loongarch64 -mlsx" ...

[ycsqwan]

if your goal was to get this into upstream ogre, it would be better to commit the individual changes on top of upstream master instead of having one "Initial commit: .." with everything.

Thank you very much for the quick feedback and suggestions!
I'll prepare a proper Pull Request soon and link it here for review.
Thanks again for your time!
ycsqwan

[ycsqwan]

if your goal was to get this into upstream ogre, it would be better to commit the individual changes on top of upstream master instead of having one "Initial commit: .." with everything.

Thanks again! I've opened the PR with clean commits:

https://github.com/OGRECave/ogre/pull/3520

Looking forward to any feedback!

ycsqwan