U.S. and South Korean RISC-V researchers managed to make Nvidia's CUDA code compatible with non-Nvidia hardware. It is quite the achievement considering AMD and Intel have not yet pursued such a solution. The RISC-V-based Vortex GPGPU essentially translates CUDA code into OpenCL instructions through the RISC-V library.
https://www.notebookcheck.net/Researchers-enable-Nvidia-CUDA-app-support-on-RISC-V-GPGPU.559386.0.html