With the resizable BAR support getting more adaptation. Standard swizzle is becoming more important too:
docs.microsoft.com/en-us/windows/…
With standard swizzle, you can do the swizzle on CPU side (even store swizzled textures on disk) and write to GPU memory directly without a copy.
docs.microsoft.com/en-us/windows/…
With standard swizzle, you can do the swizzle on CPU side (even store swizzled textures on disk) and write to GPU memory directly without a copy.
I am just wondering how good the standard swizzle support is nowadays. AFAIK only Intel supported this feature in the beginning. What's the current situation? Is it supported on Nvidia and AMD? If yes, is it fast?
If the optimal tiling layout is 5%+ faster than standard swizzled, then there's no point in using it. Just pay the GPU copy cost for better runtime performance. But if the cost is tiny, then simply use RBAR memory for everything :)
And Zen 3 has full rate _pdep_u32 similar to Intel now. Seems to be 250x throughput :)
Here's an example how you do standard swizzle with _pdep_u32:
docs.microsoft.com/en-us/windows/…
Here's an example how you do standard swizzle with _pdep_u32:
docs.microsoft.com/en-us/windows/…
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