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add single precision, add aa-vec-sl-soa kernel, updated doc
[LbmBenchmarkKernelsPublic.git] / src / BenchKernelD3Q19Aa.c
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MW		 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 "BenchKernelD3Q19AaCommon.h"
28
29#include "Memory.h"
30#include "Vtk.h"
31#include "LikwidIf.h"
32
33#include <inttypes.h>
34#include <math.h>
35
36#ifdef _OPENMP
37 #include <omp.h>
38#endif
39
40void FNAME(D3Q19AaKernel)(LatticeDesc * ld, KernelData * kernelData, CaseData * cd)
41{
42 Assert(ld != NULL);
43 Assert(kernelData != NULL);
44 Assert(cd != NULL);
45
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MW		 46 Assert(cd->Omega > F(0.0));
47 Assert(cd->Omega < F(2.0));
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MW		 48
49 KernelData * kd = (KernelData *)kernelData;
50
51
52 int nX = ld->Dims[0];
53 int nY = ld->Dims[1];
54 int nZ = ld->Dims[2];
55
56 int * gDims = kd->GlobalDims;
57
58 int oX = kd->Offsets[0];
59 int oY = kd->Offsets[1];
60 int oZ = kd->Offsets[2];
61
62 KernelDataAa * kda = KDA(kd);
63
64 int blk[3];
65 blk[0] = kda->Blk[0];
66 blk[1] = kda->Blk[1];
67 blk[2] = kda->Blk[2];
68
69 PdfT omega = cd->Omega;
70 PdfT omegaEven = omega;
0fde6e45 71 PdfT magicParam = F(1.0) / F(12.0);
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MW		 72 // 1/4: best stability;
73 // 1/12: removes third-order advection error (best advection);
74 // 1/6: removes fourth-order diffusion error (best diffusion);
75 // 3/16: exact location of bounce back for poiseuille flow
76
0fde6e45 77 PdfT omegaOdd = F(1.0)/( F(0.5) + magicParam/(F(1.0)/omega - F(0.5)) );
e3f82424 78
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MW		 79 PdfT evenPart = F(0.0);
80 PdfT oddPart = F(0.0);
81 PdfT dir_indep_trm = F(0.0);
e3f82424 82
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MW		 83 PdfT w_0 = F(1.0) / F(3.0);
84 PdfT w_1 = F(1.0) / F(18.0);
85 PdfT w_2 = F(1.0) / F(36.0);
e3f82424 86
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MW		 87 PdfT w_1_x3 = w_1 * F(3.0); PdfT w_1_nine_half = w_1 * F(9.0)/F(2.0); PdfT w_1_indep = F(0.0);
88 PdfT w_2_x3 = w_2 * F(3.0); PdfT w_2_nine_half = w_2 * F(9.0)/F(2.0); PdfT w_2_indep = F(0.0);
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MW		 89
90 PdfT ux, uy, uz, ui;
91 PdfT dens;
92
93 // Declare pdf_N, pdf_E, pdf_S, pdf_W, ...
94 #define X(name, idx, idxinv, x, y, z) PdfT JOIN(pdf_,name);
95 D3Q19_LIST
96 #undef X
97
98 PdfT * src = kd->Pdfs[0];
99
100 int maxIterations = cd->MaxIterations;
101
102 #ifdef VTK_OUTPUT
103 if (cd->VtkOutput) {
104 kd->PdfsActive = src;
105 VtkWrite(ld, kd, cd, -1);
106 }
107 #endif
108
109 #ifdef STATISTICS
110 kd->PdfsActive = src;
111 KernelStatistics(kd, ld, cd, 0);
112 #endif
113
114
115 int nThreads = 1;
116
117 #ifdef _OPENMP
118 nThreads = omp_get_max_threads();
119 #endif
120
121 for (int iter = 0; iter < maxIterations; iter += 2) {
122
123 // --------------------------------------------------------------------
124 // even time step
125
126 X_LIKWID_START("aa-even");
127
128 // {{{
129
130 #ifdef _OPENMP
131 #pragma omp parallel for default(none) \
132 shared(gDims,src, w_0, w_1, w_2, omegaEven, omegaOdd, \
133 w_1_x3, w_2_x3, w_1_nine_half, w_2_nine_half, cd, \
134 oX, oY, oZ, nX, nY, nZ, blk, nThreads, ld) \
135 private(ux, uy, uz, ui, dens, dir_indep_trm, \
136 pdf_C, \
137 pdf_N, pdf_E, pdf_S, pdf_W, \
138 pdf_NE, pdf_SE, pdf_SW, pdf_NW, \
139 pdf_T, pdf_TN, pdf_TE, pdf_TS, pdf_TW, \
140 pdf_B, pdf_BN, pdf_BE, pdf_BS, pdf_BW, \
141 evenPart, oddPart, w_1_indep, w_2_indep)
142 #endif
143
144 for (int i = 0; i < nThreads; ++i) {
145
146 int threadStartX = nX / nThreads * i;
147 int threadEndX = nX / nThreads * (i + 1);
148
149 if (nX % nThreads > 0) {
150 if (nX % nThreads > i) {
151 threadStartX += i;
152 threadEndX += i + 1;
153 }
154 else {
155 threadStartX += nX % nThreads;
156 threadEndX += nX % nThreads;
157 }
158 }
159
160 for (int bX = oX + threadStartX; bX < threadEndX + oX; bX += blk[0]) {
161 for (int bY = oY; bY < nY + oY; bY += blk[1]) {
162 for (int bZ = oZ; bZ < nZ + oZ; bZ += blk[2]) {
163
164 int eX = MIN(bX + blk[0], threadEndX + oX);
165 int eY = MIN(bY + blk[1], nY + oY);
166 int eZ = MIN(bZ + blk[2], nZ + oZ);
167
168 // printf("%d: %d-%d %d-%d %d-%d %d - %d\n", omp_get_thread_num(), bZ, eZ, bY, eY, bX, eX, threadStartX, threadEndX);
169
170 for (int x = bX; x < eX; ++x) {
171 for (int y = bY; y < eY; ++y) {
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MW		 172 #ifdef INTEL_OPT_DIRECTIVES
173 #pragma ivdep
174 #pragma vector always
175 #pragma simd
176 #endif
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MW		 177 for (int z = bZ; z < eZ; ++z) {
178
179
180 if (ld->Lattice[L_INDEX_4(ld->Dims, x - oX, y - oY, z - oZ)] == LAT_CELL_OBSTACLE) {
181 continue;
182 }
183
184 #define I(x, y, z, dir) P_INDEX_5(gDims, (x), (y), (z), (dir))
185
186
187 // Load PDFs of local cell: pdf_N = src[I(x, y, z, D3Q19_N)]; ...
188 #define X(name, idx, idxinv, _x, _y, _z) JOIN(pdf_,name) = src[I(x, y, z, idx)];
189 D3Q19_LIST
190 #undef X
191
192// #define LID_DRIVEN_CAVITY
193
194#ifdef LID_DRIVEN_CAVITY
195
196 if (z == nZ - 4 + oZ && x > 3 + oX && x < (nX - 4 + oX) && y > 3 + oY && y < (nY - 4 + oY)) {
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MW		 197 ux = F(0.1) * F(0.5)77;
198 uy = F(0.0);
199 uz = F(0.0);
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MW		 200
201 } else {
202 #endif
203 ux = pdf_E + pdf_NE + pdf_SE + pdf_TE + pdf_BE -
204 pdf_W - pdf_NW - pdf_SW - pdf_TW - pdf_BW;
205 uy = pdf_N + pdf_NE + pdf_NW + pdf_TN + pdf_BN -
206 pdf_S - pdf_SE - pdf_SW - pdf_TS - pdf_BS;
207 uz = pdf_T + pdf_TE + pdf_TW + pdf_TN + pdf_TS -
208 pdf_B - pdf_BE - pdf_BW - pdf_BN - pdf_BS;
209 #ifdef LID_DRIVEN_CAVITY
210 }
211 #endif
212
213 dens = pdf_C +
214 pdf_N + pdf_E + pdf_S + pdf_W +
215 pdf_NE + pdf_SE + pdf_SW + pdf_NW +
216 pdf_T + pdf_TN + pdf_TE + pdf_TS + pdf_TW +
217 pdf_B + pdf_BN + pdf_BE + pdf_BS + pdf_BW;
218
0fde6e45 219 dir_indep_trm = dens - (ux * ux + uy * uy + uz * uz)*F(3.0)/F(2.0);
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MW		 220
221 // direction: w_0
222 src[I(x, y, z, D3Q19_C)] = pdf_C - omegaEven*(pdf_C - w_0*dir_indep_trm);
223
224 // direction: w_1
225 w_1_indep = w_1*dir_indep_trm;
226
227 ui = uy;
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MW		 228 evenPart = omegaEven*( F(0.5)*(pdf_N + pdf_S) - ui*ui*w_1_nine_half - w_1_indep );
229 oddPart = omegaOdd*(F(0.5)*(pdf_N - pdf_S) - ui*w_1_x3 );
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MW		 230 src[I(x, y, z, D3Q19_S)] = pdf_N - evenPart - oddPart;
231 src[I(x, y, z, D3Q19_N)] = pdf_S - evenPart + oddPart;
232
233 ui = ux;
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MW		 234 evenPart = omegaEven*( F(0.5)*(pdf_E + pdf_W) - ui*ui*w_1_nine_half - w_1_indep );
235 oddPart = omegaOdd*(F(0.5)*(pdf_E - pdf_W) - ui*w_1_x3 );
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MW		 236 src[I(x, y, z, D3Q19_W)] = pdf_E - evenPart - oddPart;
237 src[I(x, y, z, D3Q19_E)] = pdf_W - evenPart + oddPart;
238
239 ui = uz;
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MW		 240 evenPart = omegaEven*( F(0.5)*(pdf_T + pdf_B) - ui*ui*w_1_nine_half - w_1_indep );
241 oddPart = omegaOdd*(F(0.5)*(pdf_T - pdf_B) - ui*w_1_x3 );
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MW		 242 src[I(x, y, z, D3Q19_B)] = pdf_T - evenPart - oddPart;
243 src[I(x, y, z, D3Q19_T)] = pdf_B - evenPart + oddPart;
244
245 // direction: w_2
246 w_2_indep = w_2*dir_indep_trm;
247
248 ui = -ux + uy;
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MW		 249 evenPart = omegaEven*( F(0.5)*(pdf_NW + pdf_SE) - ui*ui*w_2_nine_half - w_2_indep );
250 oddPart = omegaOdd*(F(0.5)*(pdf_NW - pdf_SE) - ui*w_2_x3 );
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MW		 251 src[I(x, y, z, D3Q19_SE)] = pdf_NW - evenPart - oddPart;
252 src[I(x, y, z, D3Q19_NW)] = pdf_SE - evenPart + oddPart;
253
254 ui = ux + uy;
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MW		 255 evenPart = omegaEven*( F(0.5)*(pdf_NE + pdf_SW) - ui*ui*w_2_nine_half - w_2_indep );
256 oddPart = omegaOdd*(F(0.5)*(pdf_NE - pdf_SW) - ui*w_2_x3 );
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MW		 257 src[I(x, y, z, D3Q19_SW)] = pdf_NE - evenPart - oddPart;
258 src[I(x, y, z, D3Q19_NE)] = pdf_SW - evenPart + oddPart;
259
260 ui = -ux + uz;
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MW		 261 evenPart = omegaEven*( F(0.5)*(pdf_TW + pdf_BE) - ui*ui*w_2_nine_half - w_2_indep );
262 oddPart = omegaOdd*(F(0.5)*(pdf_TW - pdf_BE) - ui*w_2_x3 );
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MW		 263 src[I(x, y, z, D3Q19_BE)] = pdf_TW - evenPart - oddPart;
264 src[I(x, y, z, D3Q19_TW)] = pdf_BE - evenPart + oddPart;
265
266 ui = ux + uz;
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MW		 267 evenPart = omegaEven*( F(0.5)*(pdf_TE + pdf_BW) - ui*ui*w_2_nine_half - w_2_indep );
268 oddPart = omegaOdd*(F(0.5)*(pdf_TE - pdf_BW) - ui*w_2_x3 );
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MW		 269 src[I(x, y, z, D3Q19_BW)] = pdf_TE - evenPart - oddPart;
270 src[I(x, y, z, D3Q19_TE)] = pdf_BW - evenPart + oddPart;
271
272 ui = -uy + uz;
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MW		 273 evenPart = omegaEven*( F(0.5)*(pdf_TS + pdf_BN) - ui*ui*w_2_nine_half - w_2_indep );
274 oddPart = omegaOdd*(F(0.5)*(pdf_TS - pdf_BN) - ui*w_2_x3 );
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MW		 275 src[I(x, y, z, D3Q19_BN)] = pdf_TS - evenPart - oddPart;
276 src[I(x, y, z, D3Q19_TS)] = pdf_BN - evenPart + oddPart;
277
278 ui = uy + uz;
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MW		 279 evenPart = omegaEven*( F(0.5)*(pdf_TN + pdf_BS) - ui*ui*w_2_nine_half - w_2_indep );
280 oddPart = omegaOdd*(F(0.5)*(pdf_TN - pdf_BS) - ui*w_2_x3 );
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MW		 281 src[I(x, y, z, D3Q19_BS)] = pdf_TN - evenPart - oddPart;
282 src[I(x, y, z, D3Q19_TN)] = pdf_BS - evenPart + oddPart;
283
284 #undef I
285 } } } // z, y, x (from inner to outer)
286 } } } // z, y, x (from inner to outer)
287
288 } // loop over threads
289
290 // }}}
291
292 X_LIKWID_STOP("aa-even");
293
294 #ifdef STATISTICS
295 kd->PdfsActive = src;
296 KernelStatistics(kd, ld, cd, iter);
297 #endif
298
299 // Fixup bounce back PDFs.
300 #ifdef _OPENMP
301 #pragma omp parallel for default(none) \
302 shared(kd, src)
303 #endif
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MW		 304 #ifdef INTEL_OPT_DIRECTIVES
305 #pragma ivdep
306 #endif
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MW		 307 for (int i = 0; i < kd->nBounceBackPdfs; ++i) {
308 src[kd->BounceBackPdfsSrc[i]] = src[kd->BounceBackPdfsDst[i]];
309 }
310
311 // save current iteration
312 kda->Iteration = iter;
313
314 #ifdef VERIFICATION
315 kd->PdfsActive = src;
316 KernelAddBodyForce(kd, ld, cd);
317 #endif
318
319 #ifdef VTK_OUTPUT
320 if (cd->VtkOutput && (iter % cd->VtkModulus) == 0) {
321 kd->PdfsActive = src;
322 VtkWrite(ld, kd, cd, iter);
323 }
324 #endif
325
326 #ifdef STATISTICS
327 kd->PdfsActive = src;
328 KernelStatistics(kd, ld, cd, iter);
329 #endif
330
331 // --------------------------------------------------------------------
332 // odd time step
333
334
335 X_LIKWID_START("aa-odd");
336
337 // {{{
338
339 #ifdef _OPENMP
340 #pragma omp parallel for default(none) \
341 shared(gDims,src, w_0, w_1, w_2, omegaEven, omegaOdd, \
342 w_1_x3, w_2_x3, w_1_nine_half, w_2_nine_half, cd, \
343 oX, oY, oZ, nX, nY, nZ, blk, nThreads) \
344 private(ux, uy, uz, ui, dens, dir_indep_trm, \
345 pdf_C, \
346 pdf_N, pdf_E, pdf_S, pdf_W, \
347 pdf_NE, pdf_SE, pdf_SW, pdf_NW, \
348 pdf_T, pdf_TN, pdf_TE, pdf_TS, pdf_TW, \
349 pdf_B, pdf_BN, pdf_BE, pdf_BS, pdf_BW, \
350 evenPart, oddPart, w_1_indep, w_2_indep)
351 #endif
352
353 for (int i = 0; i < nThreads; ++i) {
354
355 int threadStartX = nX / nThreads * i;
356 int threadEndX = nX / nThreads * (i + 1);
357
358 if (nX % nThreads > 0) {
359 if (nX % nThreads > i) {
360 threadStartX += i;
361 threadEndX += i + 1;
362 }
363 else {
364 threadStartX += nX % nThreads;
365 threadEndX += nX % nThreads;
366 }
367 }
368
369 for (int bX = oX + threadStartX; bX < threadEndX + oX; bX += blk[0]) {
370 for (int bY = oY; bY < nY + oY; bY += blk[1]) {
371 for (int bZ = oZ; bZ < nZ + oZ; bZ += blk[2]) {
372
373 // Must do everything here, else it would break collapse.
374 int eZ = MIN(bZ + blk[2], nZ + oZ);
375 int eY = MIN(bY + blk[1], nY + oY);
376 int eX = MIN(bX + blk[0], threadEndX + oX);
377
378 for (int x = bX; x < eX; ++x) {
379 for (int y = bY; y < eY; ++y) {
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MW		 380 #ifdef INTEL_OPT_DIRECTIVES
381 #pragma ivdep
382 #pragma vector always
383 #pragma simd
384 #endif
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MW		 385 for (int z = bZ; z < eZ; ++z) {
386
387 #define I(x, y, z, dir) P_INDEX_5(gDims, (x), (y), (z), (dir))
388
389 // Load PDFs of local cell: pdf_N = src[I(x, y, z, D3Q19_N)]; ...
390 #define X(name, idx, idxinv, _x, _y, _z) JOIN(pdf_,name) = src[I(x - _x, y - _y, z - _z, idxinv)];
391 D3Q19_LIST
392 #undef X
393
394
395// #define LID_DRIVEN_CAVITY
396
397#ifdef LID_DRIVEN_CAVITY
398
399 if (z == nZ - 4 + oZ && x > 3 + oX && x < (nX - 4 + oX) && y > 3 + oY && y < (nY - 4 + oY)) {
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MW		 400 ux = F(0.1) * F(0.5)77;
401 uy = F(0.0);
402 uz = F(0.0);
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MW		 403
404 } else {
405#endif
406 ux = pdf_E + pdf_NE + pdf_SE + pdf_TE + pdf_BE -
407 pdf_W - pdf_NW - pdf_SW - pdf_TW - pdf_BW;
408 uy = pdf_N + pdf_NE + pdf_NW + pdf_TN + pdf_BN -
409 pdf_S - pdf_SE - pdf_SW - pdf_TS - pdf_BS;
410 uz = pdf_T + pdf_TE + pdf_TW + pdf_TN + pdf_TS -
411 pdf_B - pdf_BE - pdf_BW - pdf_BN - pdf_BS;
412#ifdef LID_DRIVEN_CAVITY
413 }
414#endif
415
416 dens = pdf_C +
417 pdf_N + pdf_E + pdf_S + pdf_W +
418 pdf_NE + pdf_SE + pdf_SW + pdf_NW +
419 pdf_T + pdf_TN + pdf_TE + pdf_TS + pdf_TW +
420 pdf_B + pdf_BN + pdf_BE + pdf_BS + pdf_BW;
421
0fde6e45 422 dir_indep_trm = dens - (ux * ux + uy * uy + uz * uz)*F(3.0)/F(2.0);
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MW		 423
424 // direction: w_0
425 src[I(x, y, z, D3Q19_C)] = pdf_C - omegaEven*(pdf_C - w_0*dir_indep_trm);
426
427 // direction: w_1
428 w_1_indep = w_1*dir_indep_trm;
429
430 ui = uy;
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MW		 431 evenPart = omegaEven*( F(0.5)*(pdf_N + pdf_S) - ui*ui*w_1_nine_half - w_1_indep );
432 oddPart = omegaOdd*(F(0.5)*(pdf_N - pdf_S) - ui*w_1_x3 );
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MW		 433 src[I(x, y + 1, z, D3Q19_N)] = pdf_N - evenPart - oddPart;
434 src[I(x, y - 1, z, D3Q19_S)] = pdf_S - evenPart + oddPart;
435
436 ui = ux;
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MW		 437 evenPart = omegaEven*( F(0.5)*(pdf_E + pdf_W) - ui*ui*w_1_nine_half - w_1_indep );
438 oddPart = omegaOdd*(F(0.5)*(pdf_E - pdf_W) - ui*w_1_x3 );
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MW		 439 src[I(x + 1, y, z, D3Q19_E)] = pdf_E - evenPart - oddPart;
440 src[I(x - 1, y, z, D3Q19_W)] = pdf_W - evenPart + oddPart;
441
442 ui = uz;
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MW		 443 evenPart = omegaEven*( F(0.5)*(pdf_T + pdf_B) - ui*ui*w_1_nine_half - w_1_indep );
444 oddPart = omegaOdd*(F(0.5)*(pdf_T - pdf_B) - ui*w_1_x3 );
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MW		 445 src[I(x, y, z + 1, D3Q19_T)] = pdf_T - evenPart - oddPart;
446 src[I(x, y, z - 1, D3Q19_B)] = pdf_B - evenPart + oddPart;
447
448 // direction: w_2
449 w_2_indep = w_2*dir_indep_trm;
450
451 ui = -ux + uy;
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MW		 452 evenPart = omegaEven*( F(0.5)*(pdf_NW + pdf_SE) - ui*ui*w_2_nine_half - w_2_indep );
453 oddPart = omegaOdd*(F(0.5)*(pdf_NW - pdf_SE) - ui*w_2_x3 );
e3f82424
MW		 454 src[I(x - 1, y + 1, z, D3Q19_NW)] = pdf_NW - evenPart - oddPart;
455 src[I(x + 1, y - 1, z, D3Q19_SE)] = pdf_SE - evenPart + oddPart;
456
457 ui = ux + uy;
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MW		 458 evenPart = omegaEven*( F(0.5)*(pdf_NE + pdf_SW) - ui*ui*w_2_nine_half - w_2_indep );
459 oddPart = omegaOdd*(F(0.5)*(pdf_NE - pdf_SW) - ui*w_2_x3 );
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MW		 460 src[I(x + 1, y + 1, z, D3Q19_NE)] = pdf_NE - evenPart - oddPart;
461 src[I(x - 1, y - 1, z, D3Q19_SW)] = pdf_SW - evenPart + oddPart;
462
463 ui = -ux + uz;
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MW		 464 evenPart = omegaEven*( F(0.5)*(pdf_TW + pdf_BE) - ui*ui*w_2_nine_half - w_2_indep );
465 oddPart = omegaOdd*(F(0.5)*(pdf_TW - pdf_BE) - ui*w_2_x3 );
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MW		 466 src[I(x - 1, y, z + 1, D3Q19_TW)] = pdf_TW - evenPart - oddPart;
467 src[I(x + 1, y, z - 1, D3Q19_BE)] = pdf_BE - evenPart + oddPart;
468
469 ui = ux + uz;
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MW		 470 evenPart = omegaEven*( F(0.5)*(pdf_TE + pdf_BW) - ui*ui*w_2_nine_half - w_2_indep );
471 oddPart = omegaOdd*(F(0.5)*(pdf_TE - pdf_BW) - ui*w_2_x3 );
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MW		 472 src[I(x + 1, y, z + 1, D3Q19_TE)] = pdf_TE - evenPart - oddPart;
473 src[I(x - 1, y, z - 1, D3Q19_BW)] = pdf_BW - evenPart + oddPart;
474
475 ui = -uy + uz;
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MW		 476 evenPart = omegaEven*( F(0.5)*(pdf_TS + pdf_BN) - ui*ui*w_2_nine_half - w_2_indep );
477 oddPart = omegaOdd*(F(0.5)*(pdf_TS - pdf_BN) - ui*w_2_x3 );
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MW		 478 src[I(x, y - 1, z + 1, D3Q19_TS)] = pdf_TS - evenPart - oddPart;
479 src[I(x, y + 1, z - 1, D3Q19_BN)] = pdf_BN - evenPart + oddPart;
480
481 ui = uy + uz;
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MW		 482 evenPart = omegaEven*( F(0.5)*(pdf_TN + pdf_BS) - ui*ui*w_2_nine_half - w_2_indep );
483 oddPart = omegaOdd*(F(0.5)*(pdf_TN - pdf_BS) - ui*w_2_x3 );
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MW		 484 src[I(x, y + 1, z + 1, D3Q19_TN)] = pdf_TN - evenPart - oddPart;
485 src[I(x, y - 1, z - 1, D3Q19_BS)] = pdf_BS - evenPart + oddPart;
486
487
488 #undef I
489 } } } // z, y, x (from inner to outer)
490 } } } // z, y, x (from inner to outer)
491 } // loop over threads
492
493 // }}}
494
495 // Stop counters before bounce back. Else computing loop balance will be incorrect.
496
497 X_LIKWID_STOP("aa-odd");
498
499 // Fixup bounce back PDFs.
500 #ifdef _OPENMP
501 #pragma omp parallel for default(none) \
502 shared(kd, src)
503 #endif
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MW		 504 #ifdef INTEL_OPT_DIRECTIVES
505 #pragma ivdep
506 #endif
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MW		 507 for (int i = 0; i < kd->nBounceBackPdfs; ++i) {
508 src[kd->BounceBackPdfsDst[i]] = src[kd->BounceBackPdfsSrc[i]];
509 }
510
511 // save current iteration
512 kda->Iteration = iter + 1;
513
514 #ifdef VERIFICATION
515 kd->PdfsActive = src;
516 KernelAddBodyForce(kd, ld, cd);
517 #endif
518
519 #ifdef VTK_OUTPUT
520 if (cd->VtkOutput && (iter + 1 % cd->VtkModulus) == 0) {
521 kd->PdfsActive = src;
522 VtkWrite(ld, kd, cd, iter + 1);
523 }
524 #endif
525
526 #ifdef STATISTICS
527 kd->PdfsActive = src;
528 KernelStatistics(kd, ld, cd, iter + 1);
529 #endif // }}}
530
531
532 } // for (int iter = 0; ...
533
534 #ifdef VTK_OUTPUT
535
536 if (cd->VtkOutput) {
537 kd->PdfsActive = src;
538 VtkWrite(ld, kd, cd, maxIterations);
539 }
540
541 #endif
542
543 return;
544}
545
LBM benchmark kernels
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