It is recommended to try the package rocm-amd-opencl first.

If it does not work, this package provides the AMD OpenCL proprietary driver
for graphic cards prior Vega generation.
Not being able to list all compatible models, a GPU architecture more recent
than GCN 2nd generation might be required, with at least OpenCL 2.0 support.
Arctic Islands/Polaris series have worked, so far.

This package does not contain the AMD OpenCL library itself.
The software is automatically downloaded from AMD official website
during package installation.

Installing this package indicates acceptance of the AMD License Agreement,
available at https://www.amd.com/en/support/linux-eula and at
/usr/share/licenses/amdgpupro-opencl-orca/AMDGPUPROEULA after installation.