AMD equivalent of the CUDA Driver API?

Question

CUDA has both runtime API and driver API. What is equivalent to this in AMD?. Can I get more control if I somehow modify the IL in llvm?

Answer 1

The analog of the CUDA driver API on the AMD platform is OpenCL. I am aware of no analog of the CUDA runtime API on the AMD platform at this time.

Answer 2

I believe the closest match to the NVIDIA CUDA driver API would be AMD CAL which ships with the AMD APP SDK. AMD CAL does not only offer a more low-level host API than OpenCL, but also a more low-level compute kernel language called AMD IL, which also is the intermediate language OpenCL compiles to.