numpy CI failed on loongarch qemu test

[jinboson]

Hi, @jan-wassenberg .
Numpy CI failed on loongarch qemu test, here is the PR link :　numpy/numpy#27856.
The error link is : https://github.com/numpy/numpy/actions/runs/12312221518/job/34363842899?pr=27856.
I haven't figured out the problem. Is that because we haven't added instrinsics support into highway after we added LSX/LASX targets?

[jan-wassenberg]

Yes, those errors are because generic_ops-inl.h expects the intrinsics file to define many things such as VFromD, but because it's an empty header, that does not happen.
We cannot actually compile the HWY_LSX target until it is actually implemented. However, you could define HWY_COMPILE_ONLY_SCALAR and then it should at least build, though it would only use scalar (non-SIMD) code.

[jinboson]

Sorry for the delay reply. @jan-wassenberg Thank you so much, that works. Sorry, it will take some time to add intrinsics into highway for LSX/LASX targets, so we think we can make a minor change on Numpy CI test for loongarch to ensure the build completes successfully. The change is that adding CXXFALGS="-DHWY_COMPILE_ONLY_SCALAR" in the front of the build cmd, like below:

CXXFALGS="-DHWY_COMPILE_ONLY_SCALAR" spin build [OPTINS] [MESON_ARGS] ...

In this way the numpy would build. The CXXFALGS can be removed as long as the actual intrinsics for LSX/LASX targets are added. If there is any better idea or different opinions please feel free to let me know. Thanks. :D

[jan-wassenberg]

Sure, no worries.
I'm adding it to Highway for starters and we might also want to add this to numpy - @Mousius , what do you think?