Commit Graph

6 Commits

Author SHA1 Message Date
Brecht Van Lommel
f811e6e3ae Cycles: optimized SSE BVH traversal now also works with SSE2 CPUs, so all the
way back to Pentium 4, using a slightly less efficient instruction.

Also ensure /Ox is used for Visual Studio for RelWithDebInfo builds.
2013-06-19 17:54:26 +00:00
Brecht Van Lommel
649dd6f648 Fix cycles crash on some processors. We actually need S-SSE3 support for this
new BVH traversal code, not just SSE3.
2013-06-18 16:52:02 +00:00
Brecht Van Lommel
d57c6748c4 Cycles: optimization for BVH traveral on CPU's with SSE3, using code from Embree.
On the BMW scene, this gives roughly a 10% speedup overall with clang/gcc, and 30%
speedup with visual studio (2008). It turns out visual studio was optimizing the
existing code quite poorly compared to pretty good autovectorization by clang/gcc,
but hand written SSE code also gives a smaller speed boost there.

This code isn't enabled when using the hair minimum width feature yet, need to
make that work with the SSE code still.
2013-06-18 09:36:06 +00:00
Brecht Van Lommel
168bcfb46b Cycles OpenCL: fix other build issues when enabling more features. 2013-05-09 15:28:38 +00:00
Antony Riakiotakis
a34acd0de4 Beware of SUBSURAFACES (sounds latin) 2013-04-18 12:40:04 +00:00
Brecht Van Lommel
ed1a08382f Cycles: code refactoring to deduplicate the various BVH traversal variations.
Now there is a single BVH traversal code with #ifdefs for various features.
At runtime it will then select the appropriate variation to use depending if
instancing, hair or motion blur is in use.

This makes scenes without hair render a bit faster, especially after the
minimum width feature was added. It's not the most beautiful code, but we can't
use c++ templates and there were already 4 copies, adding 4 more to handle the
hair case separately would be too much.
2013-04-17 20:07:22 +00:00