You can look at C++ AMP too, it runs with all GPUs that support DX11 on Windows, and is a part of the Windows SDK. It's implemented by AMD ROCm on Linux, which

You can look at C++ AMP too, it runs with all GPUs that support DX11 on Windows, and is a part of the Windows SDK. It's implemented by AMD ROCm on Linux, which also implements HIP/CUDA. Normal C/C++ can run fine on modern GPU architectures.