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This change adds 32 more bit to store kernel features. While for a short term it might be possible to make a space for one or two extra bits, it seems going 64bit is inevitable. Expanding the field to 64bit might introduce some slowdown due to less optimal cache, but so is consolidation of existing flags could also lead to performance drop in certain configurations. The main tricky part of the change is Metal where function constants are used to store kernel_features, and 64bit constants are only available on macOS 12. There is a runtime check for it. On older macOS versions the flags are stored as a pair of 32bit values. It is slower, but there are unlikely to be many Cycles users on macOS 11. Ref #159470 Pull Request: https://projects.blender.org/blender/blender/pulls/162737 |
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| device.h | ||