| 1 | // -------------------------------------------------------------------------- |
| 2 | // |
| 3 | // Copyright |
| 4 | // Markus Wittmann, 2016-2017 |
| 5 | // RRZE, University of Erlangen-Nuremberg, Germany |
| 6 | // markus.wittmann -at- fau.de or hpc -at- rrze.fau.de |
| 7 | // |
| 8 | // Viktor Haag, 2016 |
| 9 | // LSS, University of Erlangen-Nuremberg, Germany |
| 10 | // |
| 11 | // This file is part of the Lattice Boltzmann Benchmark Kernels (LbmBenchKernels). |
| 12 | // |
| 13 | // LbmBenchKernels is free software: you can redistribute it and/or modify |
| 14 | // it under the terms of the GNU General Public License as published by |
| 15 | // the Free Software Foundation, either version 3 of the License, or |
| 16 | // (at your option) any later version. |
| 17 | // |
| 18 | // LbmBenchKernels is distributed in the hope that it will be useful, |
| 19 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | // GNU General Public License for more details. |
| 22 | // |
| 23 | // You should have received a copy of the GNU General Public License |
| 24 | // along with LbmBenchKernels. If not, see <http://www.gnu.org/licenses/>. |
| 25 | // |
| 26 | // -------------------------------------------------------------------------- |
| 27 | #include "BenchKernelD3Q19ListAaCommon.h" |
| 28 | |
| 29 | #include "Memory.h" |
| 30 | #include "Vtk.h" |
| 31 | |
| 32 | #include <math.h> |
| 33 | |
| 34 | |
| 35 | // Forward definition. |
| 36 | void FNAME(D3Q19ListAaKernel)(LatticeDesc * ld, struct KernelData_ * kd, CaseData * cd); |
| 37 | |
| 38 | |
| 39 | |
| 40 | |
| 41 | // ----------------------------------------------------------------------- |
| 42 | // Functions which are used as callback by the kernel to read or write |
| 43 | // PDFs and nodes. |
| 44 | |
| 45 | static void FNAME(BCGetPdf)(KernelData * kd, int x, int y, int z, int dir, PdfT * pdf) |
| 46 | { |
| 47 | Assert(kd != NULL); |
| 48 | Assert(kd->PdfsActive != NULL); |
| 49 | Assert(kd->PdfsActive == kd->Pdfs[0] || kd->PdfsActive == kd->Pdfs[1]); |
| 50 | Assert(pdf != NULL); |
| 51 | |
| 52 | Assert(x >= 0); Assert(y >= 0); Assert(z >= 0); |
| 53 | Assert(x < kd->Dims[0]); Assert(y < kd->Dims[1]); Assert(z < kd->Dims[2]); |
| 54 | Assert(dir >= 0); Assert(dir < N_D3Q19); |
| 55 | |
| 56 | KernelDataList * kdl = (KernelDataList *)kd; |
| 57 | |
| 58 | if (kdl->Iteration % 2 == 0) { |
| 59 | // Pdfs are stored inverse, local PDFs are located in remote nodes |
| 60 | |
| 61 | uint32_t nodeIndex = KDL(kd)->Grid[L_INDEX_4(kd->Dims, x, y, z)]; |
| 62 | |
| 63 | if (dir != D3Q19_C) { |
| 64 | uint32_t adjListIndex = nodeIndex * N_D3Q19_IDX; |
| 65 | |
| 66 | *pdf = kd->PdfsActive[KDL(kd)->AdjList[adjListIndex + D3Q19_INV[dir]]]; |
| 67 | } |
| 68 | else { |
| 69 | *pdf = kd->PdfsActive[P_INDEX_3(KDL(kd)->nCells, nodeIndex, dir)]; |
| 70 | } |
| 71 | |
| 72 | } |
| 73 | else { |
| 74 | *pdf = kd->PdfsActive[P_INDEX_5(KDL(kd), x, y, z, dir)]; |
| 75 | } |
| 76 | |
| 77 | |
| 78 | return; |
| 79 | } |
| 80 | |
| 81 | static void FNAME(BCSetPdf)(KernelData * kd, int x, int y, int z, int dir, PdfT pdf) |
| 82 | { |
| 83 | Assert(kd != NULL); |
| 84 | Assert(kd->PdfsActive != NULL); |
| 85 | Assert(kd->PdfsActive == kd->Pdfs[0] || kd->PdfsActive == kd->Pdfs[1]); |
| 86 | Assert(x >= 0); Assert(y >= 0); Assert(z >= 0); |
| 87 | Assert(x < kd->Dims[0]); Assert(y < kd->Dims[1]); Assert(z < kd->Dims[2]); |
| 88 | Assert(dir >= 0); Assert(dir < N_D3Q19); |
| 89 | |
| 90 | if (isnan(pdf)) { |
| 91 | printf("ERROR: setting nan %d %d %d %d %s\n", x, y, z, dir, D3Q19_NAMES[dir]); |
| 92 | DEBUG_BREAK_POINT(); |
| 93 | exit(1); |
| 94 | } |
| 95 | |
| 96 | KernelDataList * kdl = (KernelDataList *)kd; |
| 97 | |
| 98 | if (kdl->Iteration % 2 == 0) { |
| 99 | // Pdfs are stored inverse, local PDFs are located in remote nodes |
| 100 | |
| 101 | uint32_t nodeIndex = KDL(kd)->Grid[L_INDEX_4(kd->Dims, x, y, z)]; |
| 102 | |
| 103 | if (dir != D3Q19_C) { |
| 104 | uint32_t adjListIndex = nodeIndex * N_D3Q19_IDX; |
| 105 | |
| 106 | kd->PdfsActive[KDL(kd)->AdjList[adjListIndex + D3Q19_INV[dir]]] = pdf; |
| 107 | } |
| 108 | else { |
| 109 | kd->PdfsActive[P_INDEX_3(KDL(kd)->nCells, nodeIndex, dir)] = pdf; |
| 110 | } |
| 111 | |
| 112 | } |
| 113 | else { |
| 114 | kd->PdfsActive[P_INDEX_5(KDL(kd), x, y, z, dir)] = pdf; |
| 115 | } |
| 116 | |
| 117 | return; |
| 118 | } |
| 119 | |
| 120 | |
| 121 | static void GetNode(KernelData * kd, int x, int y, int z, PdfT * pdfs) |
| 122 | { |
| 123 | Assert(kd != NULL); |
| 124 | Assert(kd->PdfsActive != NULL); |
| 125 | Assert(kd->PdfsActive == kd->Pdfs[0] || kd->PdfsActive == kd->Pdfs[1]); |
| 126 | Assert(pdfs != NULL); |
| 127 | Assert(x >= 0); Assert(y >= 0); Assert(z >= 0); |
| 128 | Assert(x < kd->Dims[0]); Assert(y < kd->Dims[1]); Assert(z < kd->Dims[2]); |
| 129 | |
| 130 | KernelDataList * kdl = (KernelDataList *)kd; |
| 131 | |
| 132 | if(kdl->Iteration % 2 == 0){ |
| 133 | |
| 134 | uint32_t nodeIndex = kdl->Grid[L_INDEX_4(kdl->kd.Dims, x, y, z)]; |
| 135 | uint32_t adjListIndex = nodeIndex * N_D3Q19_IDX; |
| 136 | |
| 137 | // Load PDFs of local cell: pdf_N = src[adjList[adjListIndex + D3Q19_S]]; ... |
| 138 | pdfs[D3Q19_C] = kd->PdfsActive[P_INDEX_3(kdl->nCells, nodeIndex, D3Q19_C)]; |
| 139 | |
| 140 | #define X(name, idx, idxinv, _x, _y, _z) pdfs[idx] = kd->PdfsActive[kdl->AdjList[adjListIndex + idxinv]]; |
| 141 | D3Q19_LIST_WO_C |
| 142 | #undef X |
| 143 | |
| 144 | } else { |
| 145 | |
| 146 | #define I(x, y, z, dir) P_INDEX_5(KDL(kd), (x), (y), (z), (dir)) |
| 147 | #define X(name, idx, idxinv, _x, _y, _z) pdfs[idx] = kd->PdfsActive[I(x, y, z, idx)]; |
| 148 | D3Q19_LIST |
| 149 | #undef X |
| 150 | #undef I |
| 151 | |
| 152 | } |
| 153 | |
| 154 | #if 0 |
| 155 | // Detect NaNs |
| 156 | for (int d = 0; d < 19; ++d) { |
| 157 | if(isnan(pdfs[d]) || isinf(pdfs[d])) { |
| 158 | printf("%d %d %d %d nan! get node\n", x, y, z, d); |
| 159 | for (int d2 = 0; d2 < 19; ++d2) { |
| 160 | printf("%d: %e\n", d2, pdfs[d2]); |
| 161 | } |
| 162 | exit(1); |
| 163 | } |
| 164 | } |
| 165 | #endif |
| 166 | |
| 167 | return; |
| 168 | } |
| 169 | |
| 170 | |
| 171 | static void SetNode(KernelData * kd, int x, int y, int z, PdfT * pdfs) |
| 172 | { |
| 173 | Assert(kd != NULL); |
| 174 | Assert(kd->PdfsActive != NULL); |
| 175 | Assert(kd->PdfsActive == kd->Pdfs[0] || kd->PdfsActive == kd->Pdfs[1]); |
| 176 | Assert(pdfs != NULL); |
| 177 | |
| 178 | Assert(x >= 0); Assert(y >= 0); Assert(z >= 0); |
| 179 | Assert(x < kd->Dims[0]); Assert(y < kd->Dims[1]); Assert(z < kd->Dims[2]); |
| 180 | |
| 181 | #if 0 |
| 182 | // Detect NaNs |
| 183 | for (int d = 0; d < 19; ++d) { |
| 184 | if(isnan(pdfs[d])) { |
| 185 | printf("%d %d %d %d nan! get node\n", x, y, z, d); |
| 186 | for (int d2 = 0; d2 < 19; ++d2) { |
| 187 | printf("%d: %e\n", d2, pdfs[d2]); |
| 188 | } |
| 189 | exit(1); |
| 190 | } |
| 191 | } |
| 192 | #endif |
| 193 | |
| 194 | KernelDataList * kdl = (KernelDataList *)kd; |
| 195 | |
| 196 | if(kdl->Iteration % 2 == 0){ |
| 197 | |
| 198 | uint32_t nodeIndex = kdl->Grid[L_INDEX_4(kdl->kd.Dims, x, y, z)]; |
| 199 | uint32_t adjListIndex = nodeIndex * N_D3Q19_IDX; |
| 200 | |
| 201 | // Load PDFs of local cell: pdf_N = src[adjList[adjListIndex + D3Q19_S]]; ... |
| 202 | kd->PdfsActive[P_INDEX_3(kdl->nCells, nodeIndex, D3Q19_C)] = pdfs[D3Q19_C]; |
| 203 | |
| 204 | #define X(name, idx, idxinv, _x, _y, _z) kd->PdfsActive[kdl->AdjList[adjListIndex + idxinv]] = pdfs[idx]; |
| 205 | D3Q19_LIST_WO_C |
| 206 | #undef X |
| 207 | |
| 208 | } else { |
| 209 | |
| 210 | #define I(x, y, z, dir) P_INDEX_5(KDL(kd), (x), (y), (z), (dir)) |
| 211 | #define X(name, idx, idxinv, _x, _y, _z) kd->PdfsActive[I(x, y, z, idx)] = pdfs[idx]; |
| 212 | D3Q19_LIST |
| 213 | #undef X |
| 214 | #undef I |
| 215 | |
| 216 | } |
| 217 | |
| 218 | return; |
| 219 | } |
| 220 | |
| 221 | static void ParameterUsage() |
| 222 | { |
| 223 | printf("Kernel parameters:\n"); |
| 224 | printf(" [-blk <n>] [-blk-[xyz] <n>]\n"); |
| 225 | |
| 226 | return; |
| 227 | } |
| 228 | |
| 229 | static void ParseParameters(Parameters * params, int * blk) |
| 230 | { |
| 231 | Assert(blk != NULL); |
| 232 | |
| 233 | blk[0] = 0; blk[1] = 0; blk[2] = 0; |
| 234 | |
| 235 | #define ARG_IS(param) (!strcmp(params->KernelArgs[i], param)) |
| 236 | #define NEXT_ARG_PRESENT() \ |
| 237 | do { \ |
| 238 | if (i + 1 >= params->nKernelArgs) { \ |
| 239 | printf("ERROR: argument %s requires a parameter.\n", params->KernelArgs[i]); \ |
| 240 | exit(1); \ |
| 241 | } \ |
| 242 | } while (0) |
| 243 | |
| 244 | |
| 245 | for (int i = 0; i < params->nKernelArgs; ++i) { |
| 246 | if (ARG_IS("-blk") || ARG_IS("--blk")) { |
| 247 | NEXT_ARG_PRESENT(); |
| 248 | |
| 249 | int tmp = strtol(params->KernelArgs[++i], NULL, 0); |
| 250 | |
| 251 | if (tmp <= 0) { |
| 252 | printf("ERROR: blocking parameter must be > 0.\n"); |
| 253 | exit(1); |
| 254 | } |
| 255 | |
| 256 | blk[0] = blk[1] = blk[2] = tmp; |
| 257 | } |
| 258 | else if (ARG_IS("-blk-x") || ARG_IS("--blk-x")) { |
| 259 | NEXT_ARG_PRESENT(); |
| 260 | |
| 261 | int tmp = strtol(params->KernelArgs[++i], NULL, 0); |
| 262 | |
| 263 | if (tmp <= 0) { |
| 264 | printf("ERROR: blocking parameter must be > 0.\n"); |
| 265 | exit(1); |
| 266 | } |
| 267 | |
| 268 | blk[0] = tmp; |
| 269 | } |
| 270 | else if (ARG_IS("-blk-y") || ARG_IS("--blk-y")) { |
| 271 | NEXT_ARG_PRESENT(); |
| 272 | |
| 273 | int tmp = strtol(params->KernelArgs[++i], NULL, 0); |
| 274 | |
| 275 | if (tmp <= 0) { |
| 276 | printf("ERROR: blocking parameter must be > 0.\n"); |
| 277 | exit(1); |
| 278 | } |
| 279 | |
| 280 | blk[1] = tmp; |
| 281 | } |
| 282 | else if (ARG_IS("-blk-z") || ARG_IS("--blk-z")) { |
| 283 | NEXT_ARG_PRESENT(); |
| 284 | |
| 285 | int tmp = strtol(params->KernelArgs[++i], NULL, 0); |
| 286 | |
| 287 | if (tmp <= 0) { |
| 288 | printf("ERROR: blocking parameter must be > 0.\n"); |
| 289 | exit(1); |
| 290 | } |
| 291 | |
| 292 | blk[2] = tmp; |
| 293 | } |
| 294 | else if (ARG_IS("-h") || ARG_IS("-help") || ARG_IS("--help")) { |
| 295 | ParameterUsage(); |
| 296 | exit(1); |
| 297 | } |
| 298 | else { |
| 299 | printf("ERROR: unknown kernel parameter.\n"); |
| 300 | ParameterUsage(); |
| 301 | exit(1); |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | #undef ARG_IS |
| 306 | #undef NEXT_ARG_PRESENT |
| 307 | |
| 308 | return; |
| 309 | } |
| 310 | |
| 311 | void FNAME(D3Q19ListAaInit)(LatticeDesc * ld, KernelData ** kernelData, Parameters * params) |
| 312 | { |
| 313 | KernelData * kd; |
| 314 | KernelDataList * kdl; |
| 315 | MemAlloc((void **)&kdl, sizeof(KernelDataList)); |
| 316 | |
| 317 | kd = (KernelData *)kdl; |
| 318 | *kernelData = kd; |
| 319 | |
| 320 | #ifdef DEBUG |
| 321 | kd->Pdfs[0] = NULL; |
| 322 | kd->Pdfs[1] = NULL; |
| 323 | kd->PdfsActive = NULL; |
| 324 | kd->DstPdfs = NULL; |
| 325 | kd->SrcPdfs = NULL; |
| 326 | kd->Dims[0] = -1; |
| 327 | kd->Dims[1] = -1; |
| 328 | kd->Dims[2] = -1; |
| 329 | kd->GlobalDims[0] = -1; |
| 330 | kd->GlobalDims[1] = -1; |
| 331 | kd->GlobalDims[2] = -1; |
| 332 | kd->Offsets[0] = -1; |
| 333 | kd->Offsets[1] = -1; |
| 334 | kd->Offsets[2] = -1; |
| 335 | |
| 336 | kd->ObstIndices = NULL; |
| 337 | kd->nObstIndices = -1; |
| 338 | kd->BounceBackPdfsSrc = NULL; |
| 339 | kd->BounceBackPdfsDst = NULL; |
| 340 | kd->nBounceBackPdfs = -1; |
| 341 | |
| 342 | kdl->AdjList = NULL; |
| 343 | kdl->Coords = NULL; |
| 344 | kdl->Grid = NULL; |
| 345 | kdl->nCells = -1; |
| 346 | kdl->nFluid = -1; |
| 347 | #endif |
| 348 | |
| 349 | // Ajust the dimensions according to padding, if used. |
| 350 | kd->Dims[0] = kd->GlobalDims[0] = ld->Dims[0]; |
| 351 | kd->Dims[1] = kd->GlobalDims[1] = ld->Dims[1]; |
| 352 | kd->Dims[2] = kd->GlobalDims[2] = ld->Dims[2]; |
| 353 | |
| 354 | int * lDims = ld->Dims; |
| 355 | |
| 356 | int lX = lDims[0]; |
| 357 | int lY = lDims[1]; |
| 358 | int lZ = lDims[2]; |
| 359 | |
| 360 | int nTotalCells = lX * lY * lZ; |
| 361 | int nCells = ld->nFluid; // TODO: + padding |
| 362 | int nFluid = ld->nFluid; |
| 363 | |
| 364 | kdl->nCells = nCells; |
| 365 | kdl->nFluid = nFluid; |
| 366 | |
| 367 | PdfT * pdfs[2]; |
| 368 | |
| 369 | int blk[3] = { 0 }; |
| 370 | |
| 371 | ParseParameters(params, blk); |
| 372 | |
| 373 | if (blk[0] == 0) blk[0] = lX; |
| 374 | if (blk[1] == 0) blk[1] = lY; |
| 375 | if (blk[2] == 0) blk[2] = lZ; |
| 376 | |
| 377 | printf("# blocking x: %3d y: %3d z: %3d\n", blk[0], blk[1], blk[2]); |
| 378 | |
| 379 | printf("# allocating data for %d fluid LB nodes with padding (%lu bytes = %f MiB for both lattices)\n", |
| 380 | nCells, 2 * sizeof(PdfT) * nCells * N_D3Q19, |
| 381 | 2 * sizeof(PdfT) * nCells * N_D3Q19 / 1024.0 / 1024.0); |
| 382 | |
| 383 | MemAlloc((void **)&pdfs[0], sizeof(PdfT) * nCells * N_D3Q19); |
| 384 | |
| 385 | kd->Pdfs[0] = pdfs[0]; |
| 386 | |
| 387 | // Initialize PDFs with some (arbitrary) data for correct NUMA placement. |
| 388 | // Here we touch only the fluid nodes as this loop is OpenMP parallel and |
| 389 | // we want the same scheduling as in the kernel. |
| 390 | #ifdef _OPENMP |
| 391 | #pragma omp parallel for |
| 392 | #endif |
| 393 | for (int i = 0; i < nFluid; ++i) { for(int d = 0; d < N_D3Q19; ++d) { |
| 394 | pdfs[0][P_INDEX_3(nCells, i, d)] = 1.0; |
| 395 | } } |
| 396 | |
| 397 | // Initialize all PDFs to some standard value. |
| 398 | for (int i = 0; i < nFluid; ++i) { for(int d = 0; d < N_D3Q19; ++d) { |
| 399 | pdfs[0][P_INDEX_3(nCells, i, d)] = 0.0; |
| 400 | } } |
| 401 | |
| 402 | // ---------------------------------------------------------------------- |
| 403 | // create grid which will hold the index numbers of the fluid nodes |
| 404 | |
| 405 | uint32_t * grid; |
| 406 | |
| 407 | if (MemAlloc((void **)&grid, nTotalCells * sizeof(uint32_t))) { |
| 408 | printf("ERROR: allocating grid for numbering failed: %lu bytes.\n", nTotalCells * sizeof(uint32_t)); |
| 409 | exit(1); |
| 410 | } |
| 411 | kdl->Grid = grid; |
| 412 | |
| 413 | int latticeIndex; |
| 414 | |
| 415 | #ifdef DEBUG |
| 416 | for(int z = 0; z < lZ; ++z) { |
| 417 | for(int y = 0; y < lY; ++y) { |
| 418 | for(int x = 0; x < lX; ++x) { |
| 419 | |
| 420 | latticeIndex = L_INDEX_4(ld->Dims, x, y, z); |
| 421 | |
| 422 | grid[latticeIndex] = ~0; |
| 423 | } |
| 424 | } |
| 425 | } |
| 426 | #endif |
| 427 | |
| 428 | // ---------------------------------------------------------------------- |
| 429 | // generate numbering over grid |
| 430 | |
| 431 | uint32_t * coords; |
| 432 | |
| 433 | if (MemAlloc((void **)&coords, nFluid * sizeof(uint32_t) * 3)) { |
| 434 | printf("ERROR: allocating coords array failed: %lu bytes.\n", nFluid * sizeof(uint32_t) * 3); |
| 435 | exit(1); |
| 436 | } |
| 437 | |
| 438 | kdl->Coords = coords; |
| 439 | |
| 440 | // Index for the PDF nodes can start at 0 as we distinguish solid and fluid nodes |
| 441 | // through the ld->Lattice array. |
| 442 | int counter = 0; |
| 443 | |
| 444 | // Blocking is implemented via setup of the adjacency list. The kernel later will |
| 445 | // walk through the lattice blocked automatically. |
| 446 | for (int bZ = 0; bZ < lZ; bZ += blk[2]) { |
| 447 | for (int bY = 0; bY < lY; bY += blk[1]) { |
| 448 | for (int bX = 0; bX < lX; bX += blk[0]) { |
| 449 | |
| 450 | int eX = MIN(bX + blk[0], lX); |
| 451 | int eY = MIN(bY + blk[1], lY); |
| 452 | int eZ = MIN(bZ + blk[2], lZ); |
| 453 | |
| 454 | |
| 455 | for (int z = bZ; z < eZ; ++z) { |
| 456 | for (int y = bY; y < eY; ++y) { |
| 457 | for (int x = bX; x < eX; ++x) { |
| 458 | |
| 459 | latticeIndex = L_INDEX_4(lDims, x, y, z); |
| 460 | |
| 461 | if (ld->Lattice[latticeIndex] != LAT_CELL_OBSTACLE) { |
| 462 | grid[latticeIndex] = counter; |
| 463 | |
| 464 | coords[C_INDEX_X(counter)] = x; |
| 465 | coords[C_INDEX_Y(counter)] = y; |
| 466 | coords[C_INDEX_Z(counter)] = z; |
| 467 | |
| 468 | ++counter; |
| 469 | } |
| 470 | } } } |
| 471 | } } } |
| 472 | |
| 473 | Verify(counter == nFluid); |
| 474 | |
| 475 | uint32_t * adjList; |
| 476 | |
| 477 | // AdjList only requires 18 instead of 19 entries per node, as |
| 478 | // the center PDF needs no addressing. |
| 479 | if (MemAlloc((void **)&adjList, nFluid * sizeof(uint32_t) * N_D3Q19_IDX)) { |
| 480 | printf("ERROR: allocating adjList array failed: %lu bytes.\n", nFluid * sizeof(uint32_t) * N_D3Q19_IDX); |
| 481 | exit(1); |
| 482 | } |
| 483 | |
| 484 | kdl->AdjList = adjList; |
| 485 | |
| 486 | int x, y, z; |
| 487 | |
| 488 | uint32_t neighborIndex; |
| 489 | uint32_t dstIndex; |
| 490 | |
| 491 | int nx, ny, nz, px, py, pz; |
| 492 | |
| 493 | // Loop over all fluid nodes and compute the indices to the neighboring |
| 494 | // PDFs for configure data layout (AoS/SoA). |
| 495 | // TODO: Parallelized loop to ensure correct NUMA placement. |
| 496 | // #ifdef _OPENMP --> add line continuation |
| 497 | // #pragma omp parallel for default(none) |
| 498 | // shared(nFluid, nCells, coords, D3Q19_INV, D3Q19_X, D3Q19_Y, D3Q19_Z, |
| 499 | // stderr, |
| 500 | // lDims, grid, ld, lX, lY, lZ, adjList) |
| 501 | // private(x, y, z, nx, ny, nz, neighborIndex, dstIndex) |
| 502 | // #endif |
| 503 | for (int index = 0; index < nFluid; ++index) { |
| 504 | x = coords[C_INDEX_X(index)]; |
| 505 | y = coords[C_INDEX_Y(index)]; |
| 506 | z = coords[C_INDEX_Z(index)]; |
| 507 | |
| 508 | Assert(x >= 0 && x < lX); |
| 509 | Assert(y >= 0 && y < lY); |
| 510 | Assert(z >= 0 && z < lZ); |
| 511 | |
| 512 | Assert(ld->Lattice[L_INDEX_4(lDims, x, y, z)] != LAT_CELL_OBSTACLE); |
| 513 | |
| 514 | // Loop over all directions except the center one. |
| 515 | for(int d = 0; d < N_D3Q19 - 1; ++d) { |
| 516 | Assert(d != D3Q19_C); |
| 517 | |
| 518 | #ifdef PROP_MODEL_PUSH |
| 519 | nx = x + D3Q19_X[d]; |
| 520 | ny = y + D3Q19_Y[d]; |
| 521 | nz = z + D3Q19_Z[d]; |
| 522 | |
| 523 | #elif PROP_MODEL_PULL |
| 524 | nx = x - D3Q19_X[d]; |
| 525 | ny = y - D3Q19_Y[d]; |
| 526 | nz = z - D3Q19_Z[d]; |
| 527 | #else |
| 528 | #error No implementation for this PROP_MODEL_NAME. |
| 529 | #endif |
| 530 | // If the neighbor is outside the latcie in X direction and we have a |
| 531 | // periodic boundary then we need to wrap around. |
| 532 | if ( ((nx < 0 || nx >= lX) && ld->PeriodicX) || |
| 533 | ((ny < 0 || ny >= lY) && ld->PeriodicY) || |
| 534 | ((nz < 0 || nz >= lZ) && ld->PeriodicZ) |
| 535 | ){ |
| 536 | // x periodic |
| 537 | |
| 538 | if (nx < 0) { |
| 539 | px = lX - 1; |
| 540 | } |
| 541 | else if (nx >= lX) { |
| 542 | px = 0; |
| 543 | } else { |
| 544 | px = nx; |
| 545 | } |
| 546 | // y periodic |
| 547 | if (ny < 0) { |
| 548 | py = lY - 1; |
| 549 | } |
| 550 | else if (ny >= lY) { |
| 551 | py = 0; |
| 552 | } else { |
| 553 | py = ny; |
| 554 | } |
| 555 | |
| 556 | // z periodic |
| 557 | if (nz < 0) { |
| 558 | pz = lZ - 1; |
| 559 | } |
| 560 | else if (nz >= lZ) { |
| 561 | pz = 0; |
| 562 | } else { |
| 563 | pz = nz; |
| 564 | } |
| 565 | |
| 566 | if (ld->Lattice[L_INDEX_4(lDims, px, py, pz)] == LAT_CELL_OBSTACLE) { |
| 567 | dstIndex = P_INDEX_3(nCells, index, D3Q19_INV[d]); |
| 568 | } |
| 569 | else { |
| 570 | neighborIndex = grid[L_INDEX_4(lDims, px, py, pz)]; |
| 571 | |
| 572 | AssertMsg(neighborIndex != ~0, "Neighbor has no Index. (%d %d %d) direction %s (%d)\n", px, py, pz, D3Q19_NAMES[d], d); |
| 573 | |
| 574 | dstIndex = P_INDEX_3(nCells, neighborIndex, d); |
| 575 | } |
| 576 | } |
| 577 | else if (nx < 0 || ny < 0 || nz < 0 || nx >= lX || ny >= lY || nz >= lZ) { |
| 578 | dstIndex = P_INDEX_3(nCells, index, D3Q19_INV[d]); |
| 579 | } |
| 580 | else if (ld->Lattice[L_INDEX_4(lDims, nx, ny, nz)] == LAT_CELL_OBSTACLE) { |
| 581 | dstIndex = P_INDEX_3(nCells, index, D3Q19_INV[d]); |
| 582 | } |
| 583 | else { |
| 584 | neighborIndex = grid[L_INDEX_4(lDims, nx, ny, nz)]; |
| 585 | |
| 586 | Assert(neighborIndex != ~0); |
| 587 | |
| 588 | dstIndex = P_INDEX_3(nCells, neighborIndex, d); |
| 589 | } |
| 590 | |
| 591 | Assert(dstIndex >= 0); |
| 592 | Assert(dstIndex < nCells * N_D3Q19); |
| 593 | |
| 594 | adjList[index * N_D3Q19_IDX + d] = dstIndex; |
| 595 | } |
| 596 | } |
| 597 | |
| 598 | |
| 599 | // Fill remaining KernelData structures |
| 600 | kd->GetNode = GetNode; |
| 601 | kd->SetNode = SetNode; |
| 602 | |
| 603 | kd->BoundaryConditionsGetPdf = FNAME(BCGetPdf); |
| 604 | kd->BoundaryConditionsSetPdf = FNAME(BCSetPdf); |
| 605 | |
| 606 | kd->Kernel = FNAME(D3Q19ListAaKernel); |
| 607 | |
| 608 | kd->DstPdfs = NULL; |
| 609 | kd->PdfsActive = kd->Pdfs[0]; |
| 610 | |
| 611 | return; |
| 612 | } |
| 613 | |
| 614 | void FNAME(D3Q19ListAaDeinit)(LatticeDesc * ld, KernelData ** kernelData) |
| 615 | { |
| 616 | KernelDataList ** kdl = (KernelDataList **)kernelData; |
| 617 | |
| 618 | MemFree((void **)&((*kernelData)->Pdfs[0])); |
| 619 | |
| 620 | MemFree((void **)&((*kdl)->AdjList)); |
| 621 | MemFree((void **)&((*kdl)->Coords)); |
| 622 | MemFree((void **)&((*kdl)->Grid)); |
| 623 | |
| 624 | MemFree((void **)kernelData); |
| 625 | |
| 626 | return; |
| 627 | } |
| 628 | |