I recently asked the blender development team when will we get Smoke and Volumetrics for OpenCL; the reply I recevied was there are no plans in the future for this. I remembered AMD partnering with blender for 2.75 and and assumed there was someone working on converting CUDA code to OpenCL, but I was told from the development team they haven't heard from AMD since 2.75. I am wondering if there are any plans to occasionally convert new features implemented for CUDA to OpenCL, since the blender team does not plan on doing this anytime soon. It would be nice to be able to use my GPU's to save me a lot of time rendering smoke and volumetrics as it takes forever.
You could do this yourself using the new HIP compiler:
I'm not familiar with opencl programming and from what I've read it converts most code not all code. I've tried to run using the HIP converter by the blender team but no one is biting lol.