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diff --git a/intern/cycles/bvh/bvh8.h b/intern/cycles/bvh/bvh8.h
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+++ b/intern/cycles/bvh/bvh8.h
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+/*
+Copyright (c) 2017, Intel Corporation
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+* Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+* Neither the name of Intel Corporation nor the names of its contributors
+may be used to endorse or promote products derived from this software
+without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef __BVH8_H__
+#define __BVH8_H__
+
+#include "bvh/bvh.h"
+#include "bvh/bvh_params.h"
+
+#include "util/util_types.h"
+#include "util/util_vector.h"
+
+CCL_NAMESPACE_BEGIN
+
+class BVHNode;
+struct BVHStackEntry;
+class BVHParams;
+class BoundBox;
+class LeafNode;
+class Object;
+class Progress;
+
+#define BVH_ONODE_SIZE           16
+#define BVH_ONODE_LEAF_SIZE      1
+#define BVH_UNALIGNED_ONODE_SIZE 28
+
+/* BVH8
+*
+* Octo BVH, with each node having eight children, to use with SIMD instructions.
+*/
+class BVH8 : public BVH {
+protected:
+	/* constructor */
+	friend class BVH;
+	BVH8(const BVHParams& params, const vector<Object*>& objects);
+
+	/* pack */
+	void pack_nodes(const BVHNode *root);
+
+	void pack_leaf(const BVHStackEntry& e, const LeafNode *leaf);
+	void pack_inner(const BVHStackEntry& e, const BVHStackEntry *en, int num);
+
+	void pack_aligned_inner(const BVHStackEntry& e,
+	                        const BVHStackEntry *en,
+	                        int num);
+	void pack_aligned_node(int idx,
+	                       const BoundBox *bounds,
+	                       const int *child,
+	                       const uint visibility,
+	                       const float time_from,
+	                       const float time_to,
+	                       const int num);
+
+	void pack_unaligned_inner(const BVHStackEntry& e,
+	                          const BVHStackEntry *en,
+	                          int num);
+	void pack_unaligned_node(int idx,
+	                         const Transform *aligned_space,
+	                         const BoundBox *bounds,
+	                         const int *child,
+	                         const uint visibility,
+	                         const float time_from,
+	                         const float time_to,
+	                         const int num);
+
+	/* refit */
+	void refit_nodes();
+	void refit_node(int idx, bool leaf, BoundBox& bbox, uint& visibility);
+};
+
+CCL_NAMESPACE_END
+
+#endif /* __BVH8_H__ */