Add framework for implementation of support for AVX512VNNI

[stweil]

Using AVX512VNNI instructions is still missing.

[amitdo]

Ready for testing.

I suggest to backup the home directory and any other important stuff, in case this patch will trigger a hard crash (reboot).

[stweil]

I suggest to backup the home directory and any other important stuff, in case this patch will trigger a hard crash (reboot).

Will it? I cannot test it before August 21 because I currently don't have access to the required hardware.

[amitdo]

Will it?

I don't think so...

[amitdo]

Stefan, will you able to test the code today or in the upcoming days?

[stweil]

I just finished a first run of intsimdmatrix_test with the new code. It works, but I was surprised because the performance is identical to the AVX2 implementation.

[stweil]

Support for sw build is still missing. Therefore CI currently fails.

[amitdo]

I was surprised because the performance is identical to the AVX2 implementation.

This is disappointing.

We can also remove the 'ones' vector. The vnni version does not need it.

[amitdo]

Did you fetch and merge my commit locally?

git switch avx512-vnni
git log -1

Do you see my commit?

[stweil]

We can also remove the 'ones' vector. The vnni version does not need it.

I removed it locally. But that did not change the generated code. Obviously the compiler also removed it.