[libre-riscv-dev] [Bug 365] ROCM/Libre-SOC GPU Opcode interoperability

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Sun Jun 7 21:29:52 BST 2020


--- Comment #10 from Cole Poirier <colepoirier at gmail.com> ---
(In reply to Jacob Lifshay from comment #7)
> From what I understand, ROCm is only for OpenCL/CUDA-style compute, it
> doesn't implement the Vulkan or OpenGL APIs:
> https://github.com/RadeonOpenCompute/ROCm/issues/706
> https://github.com/RadeonOpenCompute/ROCm/issues/131

(In reply to Luke Kenneth Casson Leighton from comment #8)
> https://gpuopen.com/gpuperfapi/
> that's interesting. Version 3.5 (dec 2019):
> "Remove ROCm/HSA support."

Can you clarify the purpose of the present investigation for me? 

Are we trying to find out if we can use the many man-years of development put
into the Radeon Open Compute Stack by making minimal modifications to our
external graphics api to make it compatible with HSA/ROCM?

Is HSA general across all radeon gpus? I remember reading that HSA was an
abstraction specific to only two of AMD's APUs

Are we looking not so much for OpenCL support, but instead the graphics stack
for OpenGL, Vulkan, DirectX, etc?

Or are we looking for both Compute and Graphics?

Would we take the route of making a fork of clang/llvm specific to Libre-SOC,
and trying to have these changes upstreamed to clang/llvm trunk?

All of these questions are asked in near total ignorance.

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