diff options
Diffstat (limited to 'intern/cycles/bvh/bvh_build.cpp')
| -rw-r--r-- | intern/cycles/bvh/bvh_build.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/intern/cycles/bvh/bvh_build.cpp b/intern/cycles/bvh/bvh_build.cpp index 23c696ea6b2..da263c4945e 100644 --- a/intern/cycles/bvh/bvh_build.cpp +++ b/intern/cycles/bvh/bvh_build.cpp @@ -34,6 +34,21 @@ CCL_NAMESPACE_BEGIN +#if !defined(__KERNEL_SSE2__) +/* TODO(sergey): Move to some generic header so all code + * can use bitscan on non-SSE processors. + */ +ccl_device_inline int bitscan(int value) +{ + assert(value != 0); + int bit = 0; + while (value >>= 1) { + ++bit; + } + return bit; +} +#endif + /* BVH Build Task */ class BVHBuildTask : public Task { |