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Is it a good idea to use GCN cross lane instruction for optimization? #359

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fancyIX opened this issue Oct 24, 2023 · 1 comment
Open

Is it a good idea to use GCN cross lane instruction for optimization? #359

fancyIX opened this issue Oct 24, 2023 · 1 comment

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@fancyIX
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fancyIX commented Oct 24, 2023

Many cuda optimization methods can be migrated to AMD opencl. Besides smaller LDS, one big barrier is that opencl doesn’t have cross lane function of shfl as cuda has. However, in-line assembly is well supported with rocm compiler on Navi cards. We can use dpp instructions to exchange registers between threads even faster. Anyone interested in this work?
@diabloxenon
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I'd be happy to.

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@diabloxenon @fancyIX