Re-converging control flow on NVIDIA GPUs - What went wrong, and how we fixed it

Posted by mfilion on Apr 25, 2024 6:45 PM EDT
Collabora Blog; By Faith Ekstrand 		Mail this story
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In a recent update to NVK, Faith Ekstrand landed support in Mesa for the VK_KHR_shader_maximal_reconvergence and VK_KHR_shader_subgroup_uniform_control_flow extensions. Properly implementing these required a good bit of compiler engineering. This is the story of what went wrong and how it was fixed.

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