1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
|
#include "Operators.h"
#include <assert.h>
#include <math.h>
#include <stddef.h>
#include <stdlib.h>
/* These are MoL's low-level operators. If they are overloaded as
aliased functions, these aliased functions are called; otherwise, a
default implementation is used. */
/* The aliased functions should never be called directly from MoL's
time integrators, because they may not exist. Instead, the
operators defined here (with the MoL_ prefix) should be used. */
static
void
error_no_storage(int const var, int const tl)
{
char *const fullname = CCTK_FullName(var);
CCTK_VWarn(CCTK_WARN_ABORT, __LINE__, __FILE__, CCTK_THORNSTRING,
"Variable %s, timelevel %d has no storage", fullname, tl);
free(fullname);
return;
}
/* Some common special cases to improve performance */
static
void
op_real_set_0(CCTK_REAL *restrict const varptr,
ptrdiff_t const npoints)
{
for (ptrdiff_t i=0; i<npoints; ++i) {
varptr[i] = 0.0;
}
}
static
void
op_real_set_1(CCTK_REAL *restrict const varptr,
CCTK_REAL const *restrict const srcptr0,
CCTK_REAL const fact0,
ptrdiff_t const npoints)
{
for (ptrdiff_t i=0; i<npoints; ++i) {
varptr[i] = fact0 * srcptr0[i];
}
}
static
void
op_real_set_2(CCTK_REAL *restrict const varptr,
CCTK_REAL const *restrict const srcptr0,
CCTK_REAL const fact0,
CCTK_REAL const *restrict const srcptr1,
CCTK_REAL const fact1,
ptrdiff_t const npoints)
{
for (ptrdiff_t i=0; i<npoints; ++i) {
varptr[i] = fact0 * srcptr0[i] + fact1 * srcptr1[i];
}
}
static
void
op_real_set_3(CCTK_REAL *restrict const varptr,
CCTK_REAL const *restrict const srcptr0,
CCTK_REAL const fact0,
CCTK_REAL const *restrict const srcptr1,
CCTK_REAL const fact1,
CCTK_REAL const *restrict const srcptr2,
CCTK_REAL const fact2,
ptrdiff_t const npoints)
{
for (ptrdiff_t i=0; i<npoints; ++i) {
varptr[i] = fact0 * srcptr0[i] + fact1 * srcptr1[i] + fact2 * srcptr2[i];
}
}
static
void
op_real_update_0(CCTK_REAL *restrict const varptr,
CCTK_REAL const scale,
ptrdiff_t const npoints)
{
for (ptrdiff_t i=0; i<npoints; ++i) {
varptr[i] = scale * varptr[i];
}
}
static
void
op_real_update_1(CCTK_REAL *restrict const varptr,
CCTK_REAL const scale,
CCTK_REAL const *restrict const srcptr0,
CCTK_REAL const fact0,
ptrdiff_t const npoints)
{
for (ptrdiff_t i=0; i<npoints; ++i) {
varptr[i] = scale * varptr[i] + fact0 * srcptr0[i];
}
}
static
void
op_real_update_2(CCTK_REAL *restrict const varptr,
CCTK_REAL const scale,
CCTK_REAL const *restrict const srcptr0,
CCTK_REAL const fact0,
CCTK_REAL const *restrict const srcptr1,
CCTK_REAL const fact1,
ptrdiff_t const npoints)
{
for (ptrdiff_t i=0; i<npoints; ++i) {
varptr[i] = scale * varptr[i] + fact0 * srcptr0[i] + fact1 * srcptr1[i];
}
}
static
void
op_real_update_3(CCTK_REAL *restrict const varptr,
CCTK_REAL const scale,
CCTK_REAL const *restrict const srcptr0,
CCTK_REAL const fact0,
CCTK_REAL const *restrict const srcptr1,
CCTK_REAL const fact1,
CCTK_REAL const *restrict const srcptr2,
CCTK_REAL const fact2,
ptrdiff_t const npoints)
{
for (ptrdiff_t i=0; i<npoints; ++i) {
varptr[i] =
scale * varptr[i] +
fact0 * srcptr0[i] + fact1 * srcptr1[i] + fact2 * srcptr2[i];
}
}
CCTK_INT
MoL_LinearCombination(cGH const *const cctkGH,
CCTK_INT const var,
CCTK_REAL const scale,
CCTK_INT const srcs[],
CCTK_INT const tls[],
CCTK_REAL const facts[],
CCTK_INT const nsrcs)
{
// Forward call to aliased function, if it is defined
static int is_aliased = -1;
if (is_aliased < 0) {
is_aliased = CCTK_IsFunctionAliased("LinearCombination");
}
if (is_aliased) {
return LinearCombination(cctkGH, var, scale, srcs, tls, facts, nsrcs);
}
// Determine grid variable size
double *y;
int y_idx = -1, i, j;
int const dim = CCTK_GroupDimFromVarI(var);
int ash[dim];
int const ierr = CCTK_GroupashVI(cctkGH, dim, ash, var);
assert(!ierr);
y = CCTK_VarDataPtr(cctkGH, 0, "grid::y");
assert(y);
for (i = 0; i < ash[1]; i++) {
if (fabs(y[CCTK_GFINDEX3D(cctkGH, 0, i, 0)]) < 1e-8) {
y_idx = i;
break;
}
}
if (y_idx < 0)
assert(0);
// TODO: check that all src variables have the same ash
ptrdiff_t npoints = 1;
for (int d=0; d<dim; ++d) {
npoints *= ash[d];
}
switch (CCTK_VarTypeI(var)) {
case CCTK_VARIABLE_REAL: {
// Obtain pointer to variable data
// TODO: check that all variable types are CCTK_REAL
CCTK_REAL *restrict const varptr = CCTK_VarDataPtrI(cctkGH, 0, var);
if (!varptr) error_no_storage(var, 0);
CCTK_REAL const *restrict srcptrs[nsrcs];
for (int n=0; n<nsrcs; ++n) {
srcptrs[n] = CCTK_VarDataPtrI(cctkGH, tls[n], srcs[n]);
if (!srcptrs[n]) error_no_storage(srcs[n], tls[n]);
}
if (scale == 0.0) {
// Set (overwrite) target variable
// Introduce special cases for some common cases to improve
// performance
switch (nsrcs) {
case 0:
for (i = 0; i < ash[2]; i++) {
int offset = CCTK_GFINDEX3D(cctkGH, 0, y_idx, i);
op_real_set_0(varptr + offset, ash[0]);
}
break;
case 1:
for (i = 0; i < ash[2]; i++) {
int offset = CCTK_GFINDEX3D(cctkGH, 0, y_idx, i);
op_real_set_1(varptr + offset, srcptrs[0] + offset, facts[0], ash[0]);
}
break;
case 2:
for (i = 0; i < ash[2]; i++) {
int offset = CCTK_GFINDEX3D(cctkGH, 0, y_idx, i);
op_real_set_2(varptr + offset, srcptrs[0] + offset, facts[0],
srcptrs[1] + offset, facts[1], ash[0]);
}
break;
case 3:
for (i = 0; i < ash[2]; i++) {
int offset = CCTK_GFINDEX3D(cctkGH, 0, y_idx, i);
op_real_set_3(varptr + offset,
srcptrs[0] + offset, facts[0], srcptrs[1] + offset, facts[1],
srcptrs[2] + offset, facts[2], ash[0]);
}
break;
default:
// Loop over all grid points
for (i = 0; i < ash[2]; i++) {
for (j = 0; j < ash[0]; j++) {
int idx = CCTK_GFINDEX3D(cctkGH, j, y_idx, i);
CCTK_REAL tmp = 0.0;
for (int n=0; n<nsrcs; ++n) {
tmp += facts[n] * srcptrs[n][idx];
}
varptr[idx] = tmp;
}
}
break;
}
} else {
// Update (add to) target variable
// Introduce special cases for some common cases to improve
// performance
switch (nsrcs) {
case 0:
for (i = 0; i < ash[2]; i++) {
int offset = CCTK_GFINDEX3D(cctkGH, 0, y_idx, i);
op_real_update_0(varptr + offset, scale, ash[0]);
}
break;
case 1:
for (i = 0; i < ash[2]; i++) {
int offset = CCTK_GFINDEX3D(cctkGH, 0, y_idx, i);
op_real_update_1(varptr + offset, scale, srcptrs[0] + offset, facts[0], ash[0]);
}
break;
case 2:
for (i = 0; i < ash[2]; i++) {
int offset = CCTK_GFINDEX3D(cctkGH, 0, y_idx, i);
op_real_update_2(varptr + offset, scale,
srcptrs[0] + offset, facts[0],
srcptrs[1] + offset, facts[1], ash[0]);
}
break;
case 3:
for (i = 0; i < ash[2]; i++) {
int offset = CCTK_GFINDEX3D(cctkGH, 0, y_idx, i);
op_real_update_3(varptr + offset, scale,
srcptrs[0] + offset, facts[0], srcptrs[1] + offset, facts[1],
srcptrs[2] + offset, facts[2], ash[0]);
}
break;
default:
// Loop over all grid points
for (i = 0; i < ash[2]; i++) {
for (j = 0; j < ash[0]; j++) {
int idx = CCTK_GFINDEX3D(cctkGH, j, y_idx, i);
CCTK_REAL tmp = scale * varptr[idx];
for (int n=0; n<nsrcs; ++n) {
tmp += facts[n] * srcptrs[n][idx];
}
varptr[idx] = tmp;
}
}
break;
}
}
break;
}
case CCTK_VARIABLE_COMPLEX: {
// Obtain pointer to variable data
// TODO: check that all variable types are CCTK_COMPLEX
CCTK_COMPLEX *restrict const varptr = CCTK_VarDataPtrI(cctkGH, 0, var);
if (!varptr) error_no_storage(var, 0);
CCTK_COMPLEX const *restrict srcptrs[nsrcs];
for (int n=0; n<nsrcs; ++n) {
srcptrs[n] = CCTK_VarDataPtrI(cctkGH, tls[n], srcs[n]);
if (!srcptrs[n]) error_no_storage(srcs[n], tls[n]);
}
if (scale == 0.0) {
// Set (overwrite) target variable
// Loop over all grid points
for (ptrdiff_t i=0; i<npoints; ++i) {
CCTK_COMPLEX tmp = CCTK_Cmplx(0.0, 0.0);
for (int n=0; n<nsrcs; ++n) {
tmp = CCTK_CmplxAdd(tmp, CCTK_CmplxMul(CCTK_Cmplx(facts[n], 0.0),
srcptrs[n][i]));
}
varptr[i] = tmp;
}
} else {
// Update (add to) target variable
for (ptrdiff_t i=0; i<npoints; ++i) {
CCTK_COMPLEX tmp = CCTK_CmplxMul(CCTK_Cmplx(scale, 0.0), varptr[i]);
for (int n=0; n<nsrcs; ++n) {
tmp = CCTK_CmplxAdd(tmp, CCTK_CmplxMul(CCTK_Cmplx(facts[n], 0.0),
srcptrs[n][i]));
}
varptr[i] = tmp;
}
}
break;
}
default:
// Other types (e.g. CCTK_REAL4) could be supported as well
CCTK_WARN(CCTK_WARN_ABORT, "Unsupported variable type");
}
if (CCTK_IsFunctionAliased("Accelerator_NotifyDataModified")) {
CCTK_INT const tl = 0;
Accelerator_NotifyDataModified(cctkGH, &var, &tl, 1, 0);
}
// Done
return 0;
}
|
