diff options
| author | Andre Susano Pinto <andresusanopinto@gmail.com> | 2009-08-07 00:20:40 +0400 |
|---|---|---|
| committer | Andre Susano Pinto <andresusanopinto@gmail.com> | 2009-08-07 00:20:40 +0400 |
| commit | 4bc9ebd61f6a05532c59741073d2565fc4d6a8c7 (patch) | |
| tree | c3c2695df386cd0e65483e9e68472d88508c5d84 /source/blender/render/intern/raytrace | |
| parent | f16df034c3ea2824b0fb3cd6a10ab1627089ec22 (diff) | |
usage of simd on bb tests
Diffstat (limited to 'source/blender/render/intern/raytrace')
| -rw-r--r-- | source/blender/render/intern/raytrace/bvh.h | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/source/blender/render/intern/raytrace/bvh.h b/source/blender/render/intern/raytrace/bvh.h index 0f40ab5a408..50cdca4193d 100644 --- a/source/blender/render/intern/raytrace/bvh.h +++ b/source/blender/render/intern/raytrace/bvh.h @@ -28,20 +28,20 @@ */ #include <xmmintrin.h> -inline int test_bb_group4(__m128 *bb_group, Isect *isec) +inline int test_bb_group4(__m128 *bb_group, __m128 *start, __m128 *idot_axis, Isect *isec) { -/* - const float *bb = _bb; - __m128 tmin={0}, tmax = {isec->labda}; + + __m128 tmin = _mm_setzero_ps(); + __m128 tmax = _mm_load1_ps(&isec->labda); - tmin = _mm_max_ps(tmin, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[0]], isec->sse_start[0] ), isec->sse_idot_axis[0]) ); - tmax = _mm_min_ps(tmax, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[1]], isec->sse_start[0] ), isec->sse_idot_axis[0]) ); - tmin = _mm_max_ps(tmin, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[2]], isec->sse_start[1] ), isec->sse_idot_axis[1]) ); - tmax = _mm_min_ps(tmax, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[3]], isec->sse_start[1] ), isec->sse_idot_axis[1]) ); - tmin = _mm_max_ps(tmin, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[4]], isec->sse_start[2] ), isec->sse_idot_axis[2]) ); - tmax = _mm_min_ps(tmax, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[5]], isec->sse_start[2] ), isec->sse_idot_axis[2]) ); - */ - return 4; //_mm_movemask_ps(_mm_cmpge_ps(tmax, tmin)); + tmin = _mm_max_ps(tmin, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[0]], start[0] ), idot_axis[0]) ); + tmax = _mm_min_ps(tmax, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[1]], start[0] ), idot_axis[0]) ); + tmin = _mm_max_ps(tmin, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[2]], start[1] ), idot_axis[1]) ); + tmax = _mm_min_ps(tmax, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[3]], start[1] ), idot_axis[1]) ); + tmin = _mm_max_ps(tmin, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[4]], start[2] ), idot_axis[2]) ); + tmax = _mm_min_ps(tmax, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[5]], start[2] ), idot_axis[2]) ); + + return _mm_movemask_ps(_mm_cmpge_ps(tmax, tmin)); } @@ -151,6 +151,9 @@ static int bvh_node_stack_raycast(Node *root, Isect *isec) template<class Node,int MAX_STACK_SIZE,bool TEST_ROOT> static int bvh_node_stack_raycast_simd(Node *root, Isect *isec) { + __m128 idot_axis[3] = { _mm_load1_ps(&isec->idot_axis[0]), _mm_load1_ps(&isec->idot_axis[1]), _mm_load1_ps(&isec->idot_axis[2]) }; + __m128 start[3] = { _mm_load1_ps(&isec->start[0]), _mm_load1_ps(&isec->start[1]), _mm_load1_ps(&isec->start[2]) }; + Node *stack[MAX_STACK_SIZE]; __m128 t_bb[6]; Node * t_node[4]; @@ -180,7 +183,7 @@ static int bvh_node_stack_raycast_simd(Node *root, Isect *isec) while(true) { //Use SIMD 4 - if(0 && stack_pos >= 4) + if(stack_pos >= 4) { stack_pos -= 4; for(int i=0; i<4; i++) @@ -197,7 +200,7 @@ static int bvh_node_stack_raycast_simd(Node *root, Isect *isec) bb[4*5] = t->bb[5]; t_node[i] = t->child; } - int res = test_bb_group4( t_bb, isec ); + int res = test_bb_group4( t_bb, start, idot_axis, isec ); for(int i=0; i<4; i++) if(res & (1<<i)) |