Cycles: Cleanup, comments and dead code
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@ -103,10 +103,6 @@ ccl_device_inline int ray_triangle_intersect8(
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const __m256 dirz256 = _mm256_set1_ps(ray_dir.z);
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/* Calculate vertices relative to ray origin. */
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/* const float3 v0 = tri_c - P;
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const float3 v1 = tri_a - P;
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const float3 v2 = tri_b - P; */
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__m256 v0_x_256 = _mm256_sub_ps(triC[0], Px256);
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__m256 v0_y_256 = _mm256_sub_ps(triC[1], Py256);
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__m256 v0_z_256 = _mm256_sub_ps(triC[2], Pz256);
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@ -131,11 +127,7 @@ ccl_device_inline int ray_triangle_intersect8(
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__m256 v1_v2_y_256 = _mm256_add_ps(v1_y_256, v2_y_256);
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__m256 v1_v2_z_256 = _mm256_add_ps(v1_z_256, v2_z_256);
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/* Calculate triangle edges.
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const float3 e0 = v2 - v0;
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const float3 e1 = v0 - v1;
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const float3 e2 = v1 - v2;*/
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/* Calculate triangle edges. */
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__m256 e0_x_256 = _mm256_sub_ps(v2_x_256, v0_x_256);
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__m256 e0_y_256 = _mm256_sub_ps(v2_y_256, v0_y_256);
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__m256 e0_z_256 = _mm256_sub_ps(v2_z_256, v0_z_256);
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@ -148,48 +140,32 @@ ccl_device_inline int ray_triangle_intersect8(
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__m256 e2_y_256 = _mm256_sub_ps(v1_y_256, v2_y_256);
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__m256 e2_z_256 = _mm256_sub_ps(v1_z_256, v2_z_256);
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/* Perform edge tests.
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const float U = dot(cross(v2 + v0, e0), ray_dir);
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const float V = dot(cross(v0 + v1, e1), ray_dir);
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const float W = dot(cross(v1 + v2, e2), ray_dir);*/
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//cross (AyBz - AzBy, AzBx -AxBz, AxBy - AyBx)
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/* Perform edge tests. */
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/* cross (AyBz - AzBy, AzBx -AxBz, AxBy - AyBx) */
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__m256 U_x_256 = cross256(v0_v2_y_256, e0_z_256, v0_v2_z_256, e0_y_256);
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__m256 U_y_256 = cross256(v0_v2_z_256, e0_x_256, v0_v2_x_256, e0_z_256);
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__m256 U_z_256 = cross256(v0_v2_x_256, e0_y_256, v0_v2_y_256, e0_x_256);
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//vertical dot
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/* vertical dot */
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__m256 U_256 = _mm256_mul_ps(U_x_256, dirx256);
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U_256 = _mm256_fmadd_ps(U_y_256, diry256, U_256); //_mm256_add_ps(U_256, _mm256_mul_ps(U_y_256, diry256));
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U_256 = _mm256_fmadd_ps(U_z_256, dirz256, U_256); //_mm256_add_ps(U_256, _mm256_mul_ps(U_z_256, dirz256));
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U_256 = _mm256_fmadd_ps(U_y_256, diry256, U_256);
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U_256 = _mm256_fmadd_ps(U_z_256, dirz256, U_256);
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__m256 V_x_256 = cross256(v0_v1_y_256, e1_z_256, v0_v1_z_256, e1_y_256);
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__m256 V_y_256 = cross256(v0_v1_z_256, e1_x_256, v0_v1_x_256, e1_z_256);
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__m256 V_z_256 = cross256(v0_v1_x_256, e1_y_256, v0_v1_y_256, e1_x_256);
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//vertical dot
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/* vertical dot */
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__m256 V_256 = _mm256_mul_ps(V_x_256, dirx256);
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V_256 = _mm256_fmadd_ps(V_y_256, diry256, V_256);// _mm256_add_ps(V_256, _mm256_mul_ps(V_y_256, diry256));
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V_256 = _mm256_fmadd_ps(V_z_256, dirz256, V_256);// _mm256_add_ps(V_256, _mm256_mul_ps(V_z_256, dirz256));
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V_256 = _mm256_fmadd_ps(V_y_256, diry256, V_256);
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V_256 = _mm256_fmadd_ps(V_z_256, dirz256, V_256);
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__m256 W_x_256 = cross256(v1_v2_y_256, e2_z_256, v1_v2_z_256, e2_y_256);
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__m256 W_y_256 = cross256(v1_v2_z_256, e2_x_256, v1_v2_x_256, e2_z_256);
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__m256 W_z_256 = cross256(v1_v2_x_256, e2_y_256, v1_v2_y_256, e2_x_256);
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//vertical dot
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/* vertical dot */
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__m256 W_256 = _mm256_mul_ps(W_x_256, dirx256);
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W_256 = _mm256_fmadd_ps(W_y_256, diry256,W_256);//_mm256_add_ps(W_256, _mm256_mul_ps(W_y_256, diry256));
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W_256 = _mm256_fmadd_ps(W_z_256, dirz256,W_256);//_mm256_add_ps(W_256, _mm256_mul_ps(W_z_256, dirz256));
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W_256 = _mm256_fmadd_ps(W_y_256, diry256,W_256);
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W_256 = _mm256_fmadd_ps(W_z_256, dirz256,W_256);
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//const float minUVW = min(U, min(V, W));
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//const float maxUVW = max(U, max(V, W));
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#if 0
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__m256 minUVW_256 = _mm256_min_ps(U_256, _mm256_min_ps(V_256, W_256));
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__m256 maxUVW_256 = _mm256_max_ps(U_256, _mm256_max_ps(V_256, W_256));
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//if(minUVW < 0.0f && maxUVW > 0.0f)
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__m256i mask_minmaxUVW_256 = _mm256_and_si256(
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_mm256_cmpgt_epi32(zero256, _mm256_castps_si256(minUVW_256)),
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//_mm256_castps_si256(minUVW_256),
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_mm256_cmpgt_epi32(_mm256_castps_si256(maxUVW_256), zero256));
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#else
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__m256i U_256_1 = _mm256_srli_epi32(_mm256_castps_si256(U_256), 31);
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__m256i V_256_1 = _mm256_srli_epi32(_mm256_castps_si256(V_256), 31);
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__m256i W_256_1 = _mm256_srli_epi32(_mm256_castps_si256(W_256), 31);
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@ -199,9 +175,8 @@ ccl_device_inline int ray_triangle_intersect8(
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const __m256i two256 = _mm256_set1_epi32(2);
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__m256i mask_minmaxUVW_256 = _mm256_or_si256(
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_mm256_cmpeq_epi32(one256, UVW_256_1),
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_mm256_cmpeq_epi32(two256, UVW_256_1) );
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#endif
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_mm256_cmpeq_epi32(one256, UVW_256_1),
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_mm256_cmpeq_epi32(two256, UVW_256_1));
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unsigned char mask_minmaxUVW_pos = _mm256_movemask_ps(_mm256_castsi256_ps(mask_minmaxUVW_256));
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if((mask_minmaxUVW_pos & prim_num_mask) == prim_num_mask) { //all bits set
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@ -209,81 +184,56 @@ ccl_device_inline int ray_triangle_intersect8(
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}
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/* Calculate geometry normal and denominator. */
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// const float3 Ng1 = cross(e1, e0);
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//const Vec3vfM Ng1 = stable_triangle_normal(e2,e1,e0);
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__m256 Ng1_x_256 = cross256(e1_y_256, e0_z_256, e1_z_256, e0_y_256);
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__m256 Ng1_y_256 = cross256(e1_z_256, e0_x_256, e1_x_256, e0_z_256);
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__m256 Ng1_z_256 = cross256(e1_x_256, e0_y_256, e1_y_256, e0_x_256);
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//const float3 Ng = Ng1 + Ng1;
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Ng1_x_256 = _mm256_add_ps(Ng1_x_256, Ng1_x_256);
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Ng1_y_256 = _mm256_add_ps(Ng1_y_256, Ng1_y_256);
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Ng1_z_256 = _mm256_add_ps(Ng1_z_256, Ng1_z_256);
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//const float den = dot3(Ng, dir);
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//vertical dot
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/* vertical dot */
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__m256 den_256 = _mm256_mul_ps(Ng1_x_256, dirx256);
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den_256 = _mm256_fmadd_ps(Ng1_y_256, diry256,den_256);//_mm256_add_ps(den_256, _mm256_mul_ps(Ng1_y_256, diry256));
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den_256 = _mm256_fmadd_ps(Ng1_z_256, dirz256,den_256);//_mm256_add_ps(den_256, _mm256_mul_ps(Ng1_z_256, dirz256));
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// __m256i maskden256 = _mm256_cmpeq_epi32(_mm256_castps_si256(den_256), zero256);
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den_256 = _mm256_fmadd_ps(Ng1_y_256, diry256,den_256);
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den_256 = _mm256_fmadd_ps(Ng1_z_256, dirz256,den_256);
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/* Perform depth test. */
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//const float T = dot3(v0, Ng);
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__m256 T_256 = _mm256_mul_ps(Ng1_x_256, v0_x_256);
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T_256 = _mm256_fmadd_ps(Ng1_y_256, v0_y_256,T_256);//_mm256_add_ps(T_256, _mm256_mul_ps(Ng1_y_256, v0_y_256));
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T_256 = _mm256_fmadd_ps(Ng1_z_256, v0_z_256,T_256);//_mm256_add_ps(T_256, _mm256_mul_ps(Ng1_z_256, v0_z_256));
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T_256 = _mm256_fmadd_ps(Ng1_y_256, v0_y_256,T_256);
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T_256 = _mm256_fmadd_ps(Ng1_z_256, v0_z_256,T_256);
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//const int sign_den = (__float_as_int(den) & 0x80000000);
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const __m256i c0x80000000 = _mm256_set1_epi32(0x80000000);
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__m256i sign_den_256 = _mm256_and_si256(_mm256_castps_si256(den_256), c0x80000000);
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//const float sign_T = xor_signmask(T, sign_den);
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__m256 sign_T_256 = _mm256_castsi256_ps(_mm256_xor_si256(_mm256_castps_si256(T_256), sign_den_256));
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/*if((sign_T < 0.0f) || mask_minmaxUVW_pos { return false;} */
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unsigned char mask_sign_T = _mm256_movemask_ps(sign_T_256);
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if(((mask_minmaxUVW_pos | mask_sign_T) & prim_num_mask) == prim_num_mask) {
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return false;
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} /**/
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}
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__m256 xor_signmask_256 = _mm256_castsi256_ps(_mm256_xor_si256(_mm256_castps_si256(den_256), sign_den_256));
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ccl_align(32) float den8[8], U8[8], V8[8], T8[8], sign_T8[8], xor_signmask8[8];
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ccl_align(32) unsigned int mask_minmaxUVW8[8];
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if(visibility == PATH_RAY_SHADOW_OPAQUE){
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__m256i mask_final_256 = _mm256_cmpeq_epi32(mask_minmaxUVW_256, zero256);//~mask_minmaxUVW_256
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__m256i mask_final_256 = _mm256_cmpeq_epi32(mask_minmaxUVW_256, zero256);
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__m256i maskden256 = _mm256_cmpeq_epi32(_mm256_castps_si256(den_256), zero256);
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__m256i mask0 = _mm256_cmpgt_epi32(zero256, _mm256_castps_si256(sign_T_256));
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__m256 rayt_256 = _mm256_set1_ps((*isect)->t);
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__m256i mask1 = _mm256_cmpgt_epi32(_mm256_castps_si256(sign_T_256),
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_mm256_castps_si256(
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_mm256_mul_ps(_mm256_castsi256_ps(_mm256_xor_si256(_mm256_castps_si256(den_256), sign_den_256)), rayt_256)
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)
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);
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/* __m256i mask1 = _mm256_castps_si256(_mm256_cmp_ps(sign_T_256,
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_mm256_mul_ps(_mm256_castsi256_ps(_mm256_xor_si256(_mm256_castps_si256(den_256), sign_den_256)), rayt_256),
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_CMP_GT_OS
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) );*/
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mask0 = _mm256_or_si256(mask1, mask0);
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//unsigned char mask = _mm256_movemask_ps(_mm256_castsi256_ps(mask0));
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//unsigned char maskden = _mm256_movemask_ps(_mm256_castsi256_ps(maskden256));
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//unsigned char mask_final = ((~mask) & (~maskden) & (~mask_minmaxUVW_pos));
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mask_final_256 = _mm256_andnot_si256(mask0, mask_final_256); //(~mask_minmaxUVW_pos) &(~mask)
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mask_final_256 = _mm256_andnot_si256(maskden256, mask_final_256); //(~mask_minmaxUVW_pos) &(~mask) & (~maskden)
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unsigned char mask_final = _mm256_movemask_ps(_mm256_castsi256_ps(mask_final_256));
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if((mask_final & prim_num_mask) == 0) { //all bits NOT set
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if((mask_final & prim_num_mask) == 0) {
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return false;
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} /**/
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}
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unsigned long i = 0;
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#if defined(_MSC_VER)
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unsigned char res = _BitScanForward(&i, (unsigned long)mask_final);
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@ -291,17 +241,17 @@ ccl_device_inline int ray_triangle_intersect8(
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i = __builtin_ffs(mask_final)-1;
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#endif
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den_256 = _mm256_rcp_ps(den_256); //inv_den
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U_256 = _mm256_mul_ps(U_256, den_256); //*inv_den
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V_256 = _mm256_mul_ps(V_256, den_256); //*inv_den
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T_256 = _mm256_mul_ps(T_256, den_256); //*inv_den
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__m256 inv_den_256 = _mm256_rcp_ps(den_256);
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U_256 = _mm256_mul_ps(U_256, inv_den_256);
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V_256 = _mm256_mul_ps(V_256, inv_den_256);
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T_256 = _mm256_mul_ps(T_256, inv_den_256);
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_mm256_store_ps(U8, U_256);
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_mm256_store_ps(V8, V_256);
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_mm256_store_ps(T8, T_256);
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//here we assume (kernel_tex_fetch(__prim_visibility, (prim_addr +i)) & visibility) is always true
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/* NOTE: Here we assume visibility for all triangles in the node is
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* the same. */
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(*isect)->u = U8[i];
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(*isect)->v = V8[i];
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@ -363,11 +313,11 @@ ccl_device_inline int ray_triangle_intersect8(
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#endif
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int flag = kernel_tex_fetch(__shaders, (shader & SHADER_MASK)).flags;
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/* if no transparent shadows, all light is blocked */
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/* if no transparent shadows, all light is blocked. */
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if(!(flag & SD_HAS_TRANSPARENT_SHADOW)) {
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return 2;
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}
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/* if maximum number of hits reached, block all light */
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/* if maximum number of hits reached, block all light. */
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else if(*num_hits == max_hits) {
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return 2;
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}
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@ -415,9 +365,8 @@ ccl_device_inline int ray_triangle_intersect8(
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}//if mask
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} //for
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} //default
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return ret;
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}// else PATH_RAY_SHADOW_OPAQUE
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return ret;
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}// else PATH_RAY_SHADOW_OPAQUE
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}
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ccl_device_inline int triangle_intersect8(
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