forked from bartvdbraak/blender
Cycles: Move QBVH near/far offset calculation to an utility function
Just preparing for new optimization to be used in all traversal implementation. Should be no measurable difference.
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@ -21,6 +21,36 @@ struct QBVHStackItem {
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float dist;
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};
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ccl_device_inline void qbvh_near_far_idx_calc(const float3& idir,
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int *ccl_restrict near_x,
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int *ccl_restrict near_y,
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int *ccl_restrict near_z,
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int *ccl_restrict far_x,
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int *ccl_restrict far_y,
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int *ccl_restrict far_z)
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{
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#ifdef __KERNEL_SSE__
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*near_x = 0; *far_x = 1;
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*near_y = 2; *far_y = 3;
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*near_z = 4; *far_z = 5;
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const size_t mask = movemask(ssef(idir.m128));
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const int mask_x = mask & 1;
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const int mask_y = (mask & 2) >> 1;
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const int mask_z = (mask & 4) >> 2;
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*near_x += mask_x; *far_x -= mask_x;
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*near_y += mask_y; *far_y -= mask_y;
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*near_z += mask_z; *far_z -= mask_z;
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#else
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if(idir.x >= 0.0f) { *near_x = 0; *far_x = 1; } else { *near_x = 1; *far_x = 0; }
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if(idir.y >= 0.0f) { *near_y = 2; *far_y = 3; } else { *near_y = 3; *far_y = 2; }
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if(idir.z >= 0.0f) { *near_z = 4; *far_z = 5; } else { *near_z = 5; *far_z = 4; }
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#endif
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}
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/* TOOD(sergey): Investigate if using intrinsics helps for both
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* stack item swap and float comparison.
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*/
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@ -100,27 +100,11 @@ ccl_device bool BVH_FUNCTION_FULL_NAME(QBVH)(KernelGlobals *kg,
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#endif
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/* Offsets to select the side that becomes the lower or upper bound. */
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#ifdef __KERNEL_SSE__
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int near_x = 0, near_y = 2, near_z = 4;
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int far_x = 1, far_y = 3, far_z = 5;
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const size_t mask = movemask(ssef(idir.m128));
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const int mask_x = mask & 1;
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const int mask_y = (mask & 2) >> 1;
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const int mask_z = (mask & 4) >> 2;
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near_x += mask_x; far_x -= mask_x;
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near_y += mask_y; far_y -= mask_y;
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near_z += mask_z; far_z -= mask_z;
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#else
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int near_x, near_y, near_z;
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int far_x, far_y, far_z;
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if(idir.x >= 0.0f) { near_x = 0; far_x = 1; } else { near_x = 1; far_x = 0; }
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if(idir.y >= 0.0f) { near_y = 2; far_y = 3; } else { near_y = 3; far_y = 2; }
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if(idir.z >= 0.0f) { near_z = 4; far_z = 5; } else { near_z = 5; far_z = 4; }
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#endif
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qbvh_near_far_idx_calc(idir,
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&near_x, &near_y, &near_z,
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&far_x, &far_y, &far_z);
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IsectPrecalc isect_precalc;
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triangle_intersect_precalc(dir, &isect_precalc);
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@ -442,24 +426,9 @@ ccl_device bool BVH_FUNCTION_FULL_NAME(QBVH)(KernelGlobals *kg,
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qbvh_instance_push(kg, object, ray, &P, &dir, &idir, &isect->t, &node_dist);
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# endif
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#ifdef __KERNEL_SSE__
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near_x = 0; near_y = 2; near_z = 4;
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far_x = 1; far_y = 3; far_z = 5;
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const size_t mask = movemask(ssef(idir.m128));
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const int mask_x = mask & 1;
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const int mask_y = (mask & 2) >> 1;
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const int mask_z = (mask & 4) >> 2;
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near_x += mask_x; far_x -= mask_x;
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near_y += mask_y; far_y -= mask_y;
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near_z += mask_z; far_z -= mask_z;
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#else
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if(idir.x >= 0.0f) { near_x = 0; far_x = 1; } else { near_x = 1; far_x = 0; }
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if(idir.y >= 0.0f) { near_y = 2; far_y = 3; } else { near_y = 3; far_y = 2; }
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if(idir.z >= 0.0f) { near_z = 4; far_z = 5; } else { near_z = 5; far_z = 4; }
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#endif
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qbvh_near_far_idx_calc(idir,
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&near_x, &near_y, &near_z,
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&far_x, &far_y, &far_z);
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tfar = ssef(isect->t);
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# if BVH_FEATURE(BVH_HAIR)
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dir4 = sse3f(ssef(dir.x), ssef(dir.y), ssef(dir.z));
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@ -499,25 +468,9 @@ ccl_device bool BVH_FUNCTION_FULL_NAME(QBVH)(KernelGlobals *kg,
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bvh_instance_pop(kg, object, ray, &P, &dir, &idir, &isect->t);
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# endif
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#ifdef __KERNEL_SSE__
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near_x = 0; near_y = 2; near_z = 4;
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far_x = 1; far_y = 3; far_z = 5;
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const size_t mask = movemask(ssef(idir.m128));
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const int mask_x = mask & 1;
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const int mask_y = (mask & 2) >> 1;
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const int mask_z = (mask & 4) >> 2;
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near_x += mask_x; far_x -= mask_x;
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near_y += mask_y; far_y -= mask_y;
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near_z += mask_z; far_z -= mask_z;
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#else
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if(idir.x >= 0.0f) { near_x = 0; far_x = 1; } else { near_x = 1; far_x = 0; }
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if(idir.y >= 0.0f) { near_y = 2; far_y = 3; } else { near_y = 3; far_y = 2; }
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if(idir.z >= 0.0f) { near_z = 4; far_z = 5; } else { near_z = 5; far_z = 4; }
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#endif
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qbvh_near_far_idx_calc(idir,
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&near_x, &near_y, &near_z,
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&far_x, &far_y, &far_z);
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tfar = ssef(isect->t);
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# if BVH_FEATURE(BVH_HAIR)
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dir4 = sse3f(ssef(dir.x), ssef(dir.y), ssef(dir.z));
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