forked from bartvdbraak/blender
94c919349b
Some of the files were wrongly attributing code to some other organizations and in few places proper attribution was missing. This is mainly either a copy-paste error (when new file was created from an existing one and header wasn't updated) or due to some refactor which split non-original-BF code with purely BF code. Should solve some confusion around.
436 lines
17 KiB
C
436 lines
17 KiB
C
/*
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* Copyright 2011-2014, Blender Foundation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Aligned nodes intersection SSE code is adopted from Embree,
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*/
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struct QBVHStackItem {
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int addr;
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float dist;
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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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ccl_device_inline void qbvh_item_swap(QBVHStackItem *ccl_restrict a,
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QBVHStackItem *ccl_restrict b)
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{
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QBVHStackItem tmp = *a;
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*a = *b;
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*b = tmp;
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}
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ccl_device_inline void qbvh_stack_sort(QBVHStackItem *ccl_restrict s1,
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QBVHStackItem *ccl_restrict s2,
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QBVHStackItem *ccl_restrict s3)
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{
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if(s2->dist < s1->dist) { qbvh_item_swap(s2, s1); }
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if(s3->dist < s2->dist) { qbvh_item_swap(s3, s2); }
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if(s2->dist < s1->dist) { qbvh_item_swap(s2, s1); }
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}
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ccl_device_inline void qbvh_stack_sort(QBVHStackItem *ccl_restrict s1,
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QBVHStackItem *ccl_restrict s2,
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QBVHStackItem *ccl_restrict s3,
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QBVHStackItem *ccl_restrict s4)
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{
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if(s2->dist < s1->dist) { qbvh_item_swap(s2, s1); }
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if(s4->dist < s3->dist) { qbvh_item_swap(s4, s3); }
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if(s3->dist < s1->dist) { qbvh_item_swap(s3, s1); }
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if(s4->dist < s2->dist) { qbvh_item_swap(s4, s2); }
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if(s3->dist < s2->dist) { qbvh_item_swap(s3, s2); }
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}
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/* Axis-aligned nodes intersection */
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ccl_device_inline int qbvh_aligned_node_intersect(KernelGlobals *ccl_restrict kg,
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const ssef& isect_near,
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const ssef& isect_far,
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#ifdef __KERNEL_AVX2__
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const sse3f& org_idir,
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#else
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const sse3f& org,
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#endif
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const sse3f& idir,
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const int near_x,
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const int near_y,
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const int near_z,
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const int far_x,
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const int far_y,
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const int far_z,
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const int node_addr,
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ssef *ccl_restrict dist)
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{
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const int offset = node_addr + 1;
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#ifdef __KERNEL_AVX2__
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const ssef tnear_x = msub(kernel_tex_fetch_ssef(__bvh_nodes, offset+near_x), idir.x, org_idir.x);
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const ssef tnear_y = msub(kernel_tex_fetch_ssef(__bvh_nodes, offset+near_y), idir.y, org_idir.y);
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const ssef tnear_z = msub(kernel_tex_fetch_ssef(__bvh_nodes, offset+near_z), idir.z, org_idir.z);
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const ssef tfar_x = msub(kernel_tex_fetch_ssef(__bvh_nodes, offset+far_x), idir.x, org_idir.x);
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const ssef tfar_y = msub(kernel_tex_fetch_ssef(__bvh_nodes, offset+far_y), idir.y, org_idir.y);
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const ssef tfar_z = msub(kernel_tex_fetch_ssef(__bvh_nodes, offset+far_z), idir.z, org_idir.z);
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#else
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const ssef tnear_x = (kernel_tex_fetch_ssef(__bvh_nodes, offset+near_x) - org.x) * idir.x;
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const ssef tnear_y = (kernel_tex_fetch_ssef(__bvh_nodes, offset+near_y) - org.y) * idir.y;
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const ssef tnear_z = (kernel_tex_fetch_ssef(__bvh_nodes, offset+near_z) - org.z) * idir.z;
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const ssef tfar_x = (kernel_tex_fetch_ssef(__bvh_nodes, offset+far_x) - org.x) * idir.x;
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const ssef tfar_y = (kernel_tex_fetch_ssef(__bvh_nodes, offset+far_y) - org.y) * idir.y;
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const ssef tfar_z = (kernel_tex_fetch_ssef(__bvh_nodes, offset+far_z) - org.z) * idir.z;
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#endif
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#ifdef __KERNEL_SSE41__
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const ssef tnear = maxi(maxi(tnear_x, tnear_y), maxi(tnear_z, isect_near));
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const ssef tfar = mini(mini(tfar_x, tfar_y), mini(tfar_z, isect_far));
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const sseb vmask = cast(tnear) > cast(tfar);
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int mask = (int)movemask(vmask)^0xf;
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#else
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const ssef tnear = max4(tnear_x, tnear_y, tnear_z, isect_near);
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const ssef tfar = min4(tfar_x, tfar_y, tfar_z, isect_far);
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const sseb vmask = tnear <= tfar;
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int mask = (int)movemask(vmask);
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#endif
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*dist = tnear;
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return mask;
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}
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ccl_device_inline int qbvh_aligned_node_intersect_robust(
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KernelGlobals *ccl_restrict kg,
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const ssef& isect_near,
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const ssef& isect_far,
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#ifdef __KERNEL_AVX2__
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const sse3f& P_idir,
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#else
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const sse3f& P,
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#endif
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const sse3f& idir,
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const int near_x,
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const int near_y,
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const int near_z,
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const int far_x,
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const int far_y,
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const int far_z,
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const int node_addr,
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const float difl,
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ssef *ccl_restrict dist)
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{
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const int offset = node_addr + 1;
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#ifdef __KERNEL_AVX2__
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const ssef tnear_x = msub(kernel_tex_fetch_ssef(__bvh_nodes, offset+near_x), idir.x, P_idir.x);
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const ssef tnear_y = msub(kernel_tex_fetch_ssef(__bvh_nodes, offset+near_y), idir.y, P_idir.y);
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const ssef tnear_z = msub(kernel_tex_fetch_ssef(__bvh_nodes, offset+near_z), idir.z, P_idir.z);
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const ssef tfar_x = msub(kernel_tex_fetch_ssef(__bvh_nodes, offset+far_x), idir.x, P_idir.x);
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const ssef tfar_y = msub(kernel_tex_fetch_ssef(__bvh_nodes, offset+far_y), idir.y, P_idir.y);
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const ssef tfar_z = msub(kernel_tex_fetch_ssef(__bvh_nodes, offset+far_z), idir.z, P_idir.z);
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#else
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const ssef tnear_x = (kernel_tex_fetch_ssef(__bvh_nodes, offset+near_x) - P.x) * idir.x;
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const ssef tnear_y = (kernel_tex_fetch_ssef(__bvh_nodes, offset+near_y) - P.y) * idir.y;
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const ssef tnear_z = (kernel_tex_fetch_ssef(__bvh_nodes, offset+near_z) - P.z) * idir.z;
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const ssef tfar_x = (kernel_tex_fetch_ssef(__bvh_nodes, offset+far_x) - P.x) * idir.x;
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const ssef tfar_y = (kernel_tex_fetch_ssef(__bvh_nodes, offset+far_y) - P.y) * idir.y;
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const ssef tfar_z = (kernel_tex_fetch_ssef(__bvh_nodes, offset+far_z) - P.z) * idir.z;
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#endif
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const float round_down = 1.0f - difl;
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const float round_up = 1.0f + difl;
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const ssef tnear = max4(tnear_x, tnear_y, tnear_z, isect_near);
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const ssef tfar = min4(tfar_x, tfar_y, tfar_z, isect_far);
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const sseb vmask = round_down*tnear <= round_up*tfar;
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*dist = tnear;
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return (int)movemask(vmask);
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}
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/* Unaligned nodes intersection */
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ccl_device_inline int qbvh_unaligned_node_intersect(
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KernelGlobals *ccl_restrict kg,
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const ssef& isect_near,
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const ssef& isect_far,
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#ifdef __KERNEL_AVX2__
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const sse3f& org_idir,
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#endif
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const sse3f& org,
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const sse3f& dir,
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const sse3f& idir,
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const int near_x,
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const int near_y,
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const int near_z,
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const int far_x,
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const int far_y,
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const int far_z,
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const int node_addr,
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ssef *ccl_restrict dist)
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{
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const int offset = node_addr;
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const ssef tfm_x_x = kernel_tex_fetch_ssef(__bvh_nodes, offset+1);
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const ssef tfm_x_y = kernel_tex_fetch_ssef(__bvh_nodes, offset+2);
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const ssef tfm_x_z = kernel_tex_fetch_ssef(__bvh_nodes, offset+3);
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const ssef tfm_y_x = kernel_tex_fetch_ssef(__bvh_nodes, offset+4);
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const ssef tfm_y_y = kernel_tex_fetch_ssef(__bvh_nodes, offset+5);
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const ssef tfm_y_z = kernel_tex_fetch_ssef(__bvh_nodes, offset+6);
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const ssef tfm_z_x = kernel_tex_fetch_ssef(__bvh_nodes, offset+7);
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const ssef tfm_z_y = kernel_tex_fetch_ssef(__bvh_nodes, offset+8);
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const ssef tfm_z_z = kernel_tex_fetch_ssef(__bvh_nodes, offset+9);
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const ssef tfm_t_x = kernel_tex_fetch_ssef(__bvh_nodes, offset+10);
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const ssef tfm_t_y = kernel_tex_fetch_ssef(__bvh_nodes, offset+11);
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const ssef tfm_t_z = kernel_tex_fetch_ssef(__bvh_nodes, offset+12);
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const ssef aligned_dir_x = dir.x*tfm_x_x + dir.y*tfm_x_y + dir.z*tfm_x_z,
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aligned_dir_y = dir.x*tfm_y_x + dir.y*tfm_y_y + dir.z*tfm_y_z,
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aligned_dir_z = dir.x*tfm_z_x + dir.y*tfm_z_y + dir.z*tfm_z_z;
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const ssef aligned_P_x = org.x*tfm_x_x + org.y*tfm_x_y + org.z*tfm_x_z + tfm_t_x,
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aligned_P_y = org.x*tfm_y_x + org.y*tfm_y_y + org.z*tfm_y_z + tfm_t_y,
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aligned_P_z = org.x*tfm_z_x + org.y*tfm_z_y + org.z*tfm_z_z + tfm_t_z;
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const ssef neg_one(-1.0f, -1.0f, -1.0f, -1.0f);
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const ssef nrdir_x = neg_one / aligned_dir_x,
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nrdir_y = neg_one / aligned_dir_y,
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nrdir_z = neg_one / aligned_dir_z;
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const ssef tlower_x = aligned_P_x * nrdir_x,
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tlower_y = aligned_P_y * nrdir_y,
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tlower_z = aligned_P_z * nrdir_z;
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const ssef tupper_x = tlower_x - nrdir_x,
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tupper_y = tlower_y - nrdir_y,
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tupper_z = tlower_z - nrdir_z;
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#ifdef __KERNEL_SSE41__
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const ssef tnear_x = mini(tlower_x, tupper_x);
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const ssef tnear_y = mini(tlower_y, tupper_y);
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const ssef tnear_z = mini(tlower_z, tupper_z);
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const ssef tfar_x = maxi(tlower_x, tupper_x);
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const ssef tfar_y = maxi(tlower_y, tupper_y);
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const ssef tfar_z = maxi(tlower_z, tupper_z);
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const ssef tnear = max4(isect_near, tnear_x, tnear_y, tnear_z);
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const ssef tfar = min4(isect_far, tfar_x, tfar_y, tfar_z);
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const sseb vmask = tnear <= tfar;
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*dist = tnear;
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return movemask(vmask);
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#else
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const ssef tnear_x = min(tlower_x, tupper_x);
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const ssef tnear_y = min(tlower_y, tupper_y);
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const ssef tnear_z = min(tlower_z, tupper_z);
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const ssef tfar_x = max(tlower_x, tupper_x);
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const ssef tfar_y = max(tlower_y, tupper_y);
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const ssef tfar_z = max(tlower_z, tupper_z);
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const ssef tnear = max4(isect_near, tnear_x, tnear_y, tnear_z);
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const ssef tfar = min4(isect_far, tfar_x, tfar_y, tfar_z);
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const sseb vmask = tnear <= tfar;
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*dist = tnear;
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return movemask(vmask);
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#endif
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}
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ccl_device_inline int qbvh_unaligned_node_intersect_robust(
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KernelGlobals *ccl_restrict kg,
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const ssef& isect_near,
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const ssef& isect_far,
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#ifdef __KERNEL_AVX2__
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const sse3f& P_idir,
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#endif
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const sse3f& P,
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const sse3f& dir,
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const sse3f& idir,
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const int near_x,
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const int near_y,
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const int near_z,
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const int far_x,
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const int far_y,
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const int far_z,
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const int node_addr,
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const float difl,
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ssef *ccl_restrict dist)
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{
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const int offset = node_addr;
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const ssef tfm_x_x = kernel_tex_fetch_ssef(__bvh_nodes, offset+1);
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const ssef tfm_x_y = kernel_tex_fetch_ssef(__bvh_nodes, offset+2);
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const ssef tfm_x_z = kernel_tex_fetch_ssef(__bvh_nodes, offset+3);
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const ssef tfm_y_x = kernel_tex_fetch_ssef(__bvh_nodes, offset+4);
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const ssef tfm_y_y = kernel_tex_fetch_ssef(__bvh_nodes, offset+5);
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const ssef tfm_y_z = kernel_tex_fetch_ssef(__bvh_nodes, offset+6);
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const ssef tfm_z_x = kernel_tex_fetch_ssef(__bvh_nodes, offset+7);
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const ssef tfm_z_y = kernel_tex_fetch_ssef(__bvh_nodes, offset+8);
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const ssef tfm_z_z = kernel_tex_fetch_ssef(__bvh_nodes, offset+9);
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const ssef tfm_t_x = kernel_tex_fetch_ssef(__bvh_nodes, offset+10);
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const ssef tfm_t_y = kernel_tex_fetch_ssef(__bvh_nodes, offset+11);
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const ssef tfm_t_z = kernel_tex_fetch_ssef(__bvh_nodes, offset+12);
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const ssef aligned_dir_x = dir.x*tfm_x_x + dir.y*tfm_x_y + dir.z*tfm_x_z,
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aligned_dir_y = dir.x*tfm_y_x + dir.y*tfm_y_y + dir.z*tfm_y_z,
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aligned_dir_z = dir.x*tfm_z_x + dir.y*tfm_z_y + dir.z*tfm_z_z;
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const ssef aligned_P_x = P.x*tfm_x_x + P.y*tfm_x_y + P.z*tfm_x_z + tfm_t_x,
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aligned_P_y = P.x*tfm_y_x + P.y*tfm_y_y + P.z*tfm_y_z + tfm_t_y,
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aligned_P_z = P.x*tfm_z_x + P.y*tfm_z_y + P.z*tfm_z_z + tfm_t_z;
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const ssef neg_one(-1.0f, -1.0f, -1.0f, -1.0f);
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const ssef nrdir_x = neg_one / aligned_dir_x,
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nrdir_y = neg_one / aligned_dir_y,
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nrdir_z = neg_one / aligned_dir_z;
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const ssef tlower_x = aligned_P_x * nrdir_x,
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tlower_y = aligned_P_y * nrdir_y,
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tlower_z = aligned_P_z * nrdir_z;
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const ssef tupper_x = tlower_x - nrdir_x,
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tupper_y = tlower_y - nrdir_y,
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tupper_z = tlower_z - nrdir_z;
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const float round_down = 1.0f - difl;
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const float round_up = 1.0f + difl;
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#ifdef __KERNEL_SSE41__
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const ssef tnear_x = mini(tlower_x, tupper_x);
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const ssef tnear_y = mini(tlower_y, tupper_y);
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const ssef tnear_z = mini(tlower_z, tupper_z);
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const ssef tfar_x = maxi(tlower_x, tupper_x);
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const ssef tfar_y = maxi(tlower_y, tupper_y);
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const ssef tfar_z = maxi(tlower_z, tupper_z);
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#else
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const ssef tnear_x = min(tlower_x, tupper_x);
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const ssef tnear_y = min(tlower_y, tupper_y);
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const ssef tnear_z = min(tlower_z, tupper_z);
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const ssef tfar_x = max(tlower_x, tupper_x);
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const ssef tfar_y = max(tlower_y, tupper_y);
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const ssef tfar_z = max(tlower_z, tupper_z);
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#endif
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const ssef tnear = max4(isect_near, tnear_x, tnear_y, tnear_z);
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const ssef tfar = min4(isect_far, tfar_x, tfar_y, tfar_z);
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const sseb vmask = round_down*tnear <= round_up*tfar;
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*dist = tnear;
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return movemask(vmask);
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}
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/* Intersectors wrappers.
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*
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* They'll check node type and call appropriate intersection code.
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*/
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ccl_device_inline int qbvh_node_intersect(
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KernelGlobals *ccl_restrict kg,
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const ssef& isect_near,
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const ssef& isect_far,
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#ifdef __KERNEL_AVX2__
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const sse3f& org_idir,
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#endif
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const sse3f& org,
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const sse3f& dir,
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const sse3f& idir,
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const int near_x,
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const int near_y,
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const int near_z,
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const int far_x,
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const int far_y,
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const int far_z,
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const int node_addr,
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ssef *ccl_restrict dist)
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{
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const int offset = node_addr;
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const float4 node = kernel_tex_fetch(__bvh_nodes, offset);
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if(__float_as_uint(node.x) & PATH_RAY_NODE_UNALIGNED) {
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return qbvh_unaligned_node_intersect(kg,
|
|
isect_near,
|
|
isect_far,
|
|
#ifdef __KERNEL_AVX2__
|
|
org_idir,
|
|
#endif
|
|
org,
|
|
dir,
|
|
idir,
|
|
near_x, near_y, near_z,
|
|
far_x, far_y, far_z,
|
|
node_addr,
|
|
dist);
|
|
}
|
|
else {
|
|
return qbvh_aligned_node_intersect(kg,
|
|
isect_near,
|
|
isect_far,
|
|
#ifdef __KERNEL_AVX2__
|
|
org_idir,
|
|
#else
|
|
org,
|
|
#endif
|
|
idir,
|
|
near_x, near_y, near_z,
|
|
far_x, far_y, far_z,
|
|
node_addr,
|
|
dist);
|
|
}
|
|
}
|
|
|
|
ccl_device_inline int qbvh_node_intersect_robust(
|
|
KernelGlobals *ccl_restrict kg,
|
|
const ssef& isect_near,
|
|
const ssef& isect_far,
|
|
#ifdef __KERNEL_AVX2__
|
|
const sse3f& P_idir,
|
|
#endif
|
|
const sse3f& P,
|
|
const sse3f& dir,
|
|
const sse3f& idir,
|
|
const int near_x,
|
|
const int near_y,
|
|
const int near_z,
|
|
const int far_x,
|
|
const int far_y,
|
|
const int far_z,
|
|
const int node_addr,
|
|
const float difl,
|
|
ssef *ccl_restrict dist)
|
|
{
|
|
const int offset = node_addr;
|
|
const float4 node = kernel_tex_fetch(__bvh_nodes, offset);
|
|
if(__float_as_uint(node.x) & PATH_RAY_NODE_UNALIGNED) {
|
|
return qbvh_unaligned_node_intersect_robust(kg,
|
|
isect_near,
|
|
isect_far,
|
|
#ifdef __KERNEL_AVX2__
|
|
P_idir,
|
|
#endif
|
|
P,
|
|
dir,
|
|
idir,
|
|
near_x, near_y, near_z,
|
|
far_x, far_y, far_z,
|
|
node_addr,
|
|
difl,
|
|
dist);
|
|
}
|
|
else {
|
|
return qbvh_aligned_node_intersect_robust(kg,
|
|
isect_near,
|
|
isect_far,
|
|
#ifdef __KERNEL_AVX2__
|
|
P_idir,
|
|
#else
|
|
P,
|
|
#endif
|
|
idir,
|
|
near_x, near_y, near_z,
|
|
far_x, far_y, far_z,
|
|
node_addr,
|
|
difl,
|
|
dist);
|
|
}
|
|
}
|