On Sun, Sep 3, 2017 at 3:20 PM, David Niklas <do...@mail.com> wrote: > Hello, > I'm interested in knowing why there are two different OpenCL > implementations of OpenCL drivers for AMD cards. > Is it because they support different ASICs? > One is older and going to be replaced?
As near as I can tell, ROCm requires PCIe 3.0 Atomic operations for both the CPU and GPU. As such, ROCm will never support the VLIW radeons (5000-6000 series) or the earlier generations of GCN (SI, CI, possibly VI?). According to the ROCm page, it requires Fiji/Polaris/Vega. It also requires either a Haswell or Ryzen CPU (or newer), so anyone with an older CPU will be left out of ROCm support. External GPUs via Thunderbolt 1/2 enclosures are also unsupported. There is a bit of overlap between the two projects, in that Clover/libclc supports Polaris cards on various CPUs, but it's safe to say that for the moment, if your system is supported by ROCm, it is the more complete/well-tested option. Clover/Libclc are both still works in progress that work for some use cases, but they are not complete, and have never passed a run of the CL 1.2 conformance test suite in any configuration, and it's definitely a use at your own risk type of thing for now. --Aaron > > > Thanks, > David > _______________________________________________ > mesa-dev mailing list > mesa-dev@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/mesa-dev _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
