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| author | Sergey Sharybin <sergey.vfx@gmail.com> | 2015-04-27 22:13:03 +0300 |
|---|---|---|
| committer | Sergey Sharybin <sergey.vfx@gmail.com> | 2015-04-27 22:38:32 +0300 |
| commit | ae7d84dbc1936ef7ddd00f9c22d074389f97f04f (patch) | |
| tree | 7103596bc78785ed769e90c1570d654cc14a839d /intern/cycles/blender/blender_curves.cpp | |
| parent | 278ff15c7f3c4a91ba049b7a13ecf8a4183ebf67 (diff) | |
Cycles: Use native saturate function for CUDA
This more a workaround for CUDA optimizer which can't optimize clamp(x, 0, 1)
into a single instruction and uses 4 instructions instead.
Original patch by @lockal with own modification:
Don't make changes outside of the kernel. They don't make any difference
anyway and term saturate() has a bit different meaning outside of kernel.
This gives around 2% of speedup in Barcelona file, but in more complex shader
setups with lots of math nodes with clamping speedup could be much nicer.
Subscribers: dingto
Projects: #cycles
Differential Revision: https://developer.blender.org/D1224
Diffstat (limited to 'intern/cycles/blender/blender_curves.cpp')
0 files changed, 0 insertions, 0 deletions