The GPU version of libNC is available as a free binary, and you can find MIT-licensed source code implementing (training and inference of) transformers using libNC at https://bellard.org/nncp. (nncp was meant to be a submission to the Hutter Prize, which would have required open-sourcing libNC too, but it didn't qualify due to using AVX2 and too much RAM. At least the CPU version binary is MIT licensed since ts_server is.) I think it wouldn't be that big a project to support LLaMa starting from that code, although it is dense code.

Edit: licensing