D meets GPU: recommendations?

[Bruce Carneal]

On Friday, 29 January 2021 at 17:46:05 UTC, Guillaume Piolat 
wrote:
> On Friday, 29 January 2021 at 16:34:25 UTC, Bruce Carneal wrote:
>> The project I've been working on for the last few months has a 
>> compute backend that is currently written MT+SIMD.  I would 
>> like to bring up a GPU variant.
>
> What you could do is ressurect DerelictCL, port it to BindBC, 
> and write vanilla OpenCL 1.2 + OpenCL C.
> Not up to date on both, but CUDA is messier than OpenCL.
>
> I don't really know about the other possibilities, like OpenGL 
> + compute shaders or Vulkan + compute shaders.

Thanks for the pointer to Mike's bindings.  If I run in to 
trouble plugging in with both dcompute and C++/SycL I'll take a 
look before falling back to CUDA.

I've not looked in to OpenGL compute shaders seriously either but 
I did look at Vulkan compute shaders.  They looked very strong 
with respect to future deployability but were weak in other ways 
so I kept them off the list.  I don't think I can warp my code to 
fit in to glsl or similar, at least not easily. Custom 
neighborhood indexing, group/sub-group scheduling control and 
ability to manage group local memory efficiently were the main 
concerns, IIRC.