GCC Code Coverage Report


Directory: ./
File: src/sys/classes/ds/interface/dspriv.c
Date: 2026-10-22 02:08:06
Exec Total Coverage
Lines: 333 357 93.3%
Functions: 13 14 92.9%
Branches: 966 1873 51.6%

Line Branch Exec Source
1 /*
2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3 SLEPc - Scalable Library for Eigenvalue Problem Computations
4 Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain
5
6 This file is part of SLEPc.
7 SLEPc is distributed under a 2-clause BSD license (see LICENSE).
8 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
9 */
10 /*
11 Private DS routines
12 */
13
14 #include <slepc/private/dsimpl.h> /*I "slepcds.h" I*/
15 #include <slepcblaslapack.h>
16
17 110048 PetscErrorCode DSAllocateMat_Private(DS ds,DSMatType m)
18 {
19 110048 PetscInt n,d,rows=0,cols;
20 110048 PetscBool ispep,isnep;
21
22
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110048 PetscFunctionBegin;
23 110048 n = ds->ld;
24
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110048 PetscCall(PetscObjectTypeCompare((PetscObject)ds,DSPEP,&ispep));
25
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110048 if (ispep) {
26
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13093 if (m==DS_MAT_A || m==DS_MAT_B || m==DS_MAT_W || m==DS_MAT_U || m==DS_MAT_X || m==DS_MAT_Y) {
27
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12458 PetscCall(DSPEPGetDegree(ds,&d));
28 12458 n = d*ds->ld;
29 }
30 } else {
31
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96955 PetscCall(PetscObjectTypeCompare((PetscObject)ds,DSNEP,&isnep));
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96955 if (isnep) {
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7033 if (m==DS_MAT_Q || m==DS_MAT_Z || m==DS_MAT_U || m==DS_MAT_V || m==DS_MAT_X || m==DS_MAT_Y) {
34
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849 PetscCall(DSNEPGetMinimality(ds,&d));
35 849 n = d*ds->ld;
36 }
37 }
38 }
39 110048 cols = n;
40
41
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110048 switch (m) {
42 case DS_MAT_T:
43 cols = PetscDefined(USE_COMPLEX)? 2: 3;
44 rows = n;
45 break;
46 1449 case DS_MAT_D:
47 1449 cols = 1;
48 1449 rows = n;
49 1449 break;
50 20332 case DS_MAT_X:
51 20332 rows = ds->ld;
52 20332 break;
53 912 case DS_MAT_Y:
54 912 rows = ds->ld;
55 912 break;
56 80804 default:
57 80804 rows = n;
58 }
59
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110048 if (ds->omat[m]) PetscCall(MatZeroEntries(ds->omat[m]));
60 else {
61
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48032 PetscCall(MatCreateSeqDense(PETSC_COMM_SELF,rows,cols,NULL,&ds->omat[m]));
62 }
63
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21699 PetscFunctionReturn(PETSC_SUCCESS);
64 }
65
66 401 PetscErrorCode DSReallocateMat_Private(DS ds,DSMatType mat,PetscInt ld)
67 {
68 401 Mat M;
69 401 PetscInt i,m,n,rows,cols;
70 401 PetscScalar *dst;
71 401 PetscReal *rdst;
72 401 const PetscScalar *src;
73 401 const PetscReal *rsrc;
74
75
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401 PetscFunctionBegin;
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401 PetscCall(MatGetSize(ds->omat[mat],&m,&n));
77 401 rows = ld;
78
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401 cols = m==n? ld: n;
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401 PetscCall(MatCreateSeqDense(PETSC_COMM_SELF,rows,cols,NULL,&M));
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401 PetscCall(MatDenseGetArrayRead(ds->omat[mat],&src));
81
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401 PetscCall(MatDenseGetArray(M,&dst));
82
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168 if (mat==DS_MAT_T && PetscDefined(USE_COMPLEX)) {
83 53 rsrc = (const PetscReal*)src;
84 53 rdst = (PetscReal*)dst;
85
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212 for (i=0;i<3;i++) PetscCall(PetscArraycpy(rdst+i*ld,rsrc+i*ds->ld,ds->ld));
86 } else {
87
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3603 for (i=0;i<n;i++) PetscCall(PetscArraycpy(dst+i*ld,src+i*ds->ld,ds->ld));
88 }
89
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401 PetscCall(MatDenseRestoreArrayRead(ds->omat[mat],&src));
90
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401 PetscCall(MatDenseRestoreArray(M,&dst));
91
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401 PetscCall(MatDestroy(&ds->omat[mat]));
92 401 ds->omat[mat] = M;
93
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401 PetscFunctionReturn(PETSC_SUCCESS);
94 }
95
96 832360 PetscErrorCode DSAllocateWork_Private(DS ds,PetscInt s,PetscInt r,PetscInt i)
97 {
98
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832360 PetscFunctionBegin;
99
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832360 if (s>ds->lwork) {
100
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16736 PetscCall(PetscFree(ds->work));
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16736 PetscCall(PetscMalloc1(s,&ds->work));
102 16736 ds->lwork = s;
103 }
104
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832360 if (r>ds->lrwork) {
105
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10820 PetscCall(PetscFree(ds->rwork));
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10820 PetscCall(PetscMalloc1(r,&ds->rwork));
107 10820 ds->lrwork = r;
108 }
109
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832360 if (i>ds->liwork) {
110
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6780 PetscCall(PetscFree(ds->iwork));
111
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6780 PetscCall(PetscMalloc1(i,&ds->iwork));
112 6780 ds->liwork = i;
113 }
114
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161276 PetscFunctionReturn(PETSC_SUCCESS);
115 }
116
117 /*@
118 DSViewMat - Prints one of the internal `DS` matrices.
119
120 Collective
121
122 Input Parameters:
123 + ds - the direct solver context
124 . viewer - visualization context
125 - m - matrix to display
126
127 Note:
128 Works only for `ascii` viewers. Set the viewer to Matlab format if
129 you want to paste the output into Matlab.
130
131 Level: developer
132
133 .seealso: [](sec:ds), `DSView()`
134 @*/
135 300 PetscErrorCode DSViewMat(DS ds,PetscViewer viewer,DSMatType m)
136 {
137 300 PetscInt i,j,rows,cols;
138 300 const PetscScalar *M=NULL,*v;
139 300 PetscViewerFormat format;
140 #if PetscDefined(USE_COMPLEX)
141 150 PetscBool allreal = PETSC_TRUE;
142 150 const PetscReal *vr;
143 #endif
144
145
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300 PetscFunctionBegin;
146
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300 PetscValidHeaderSpecific(ds,DS_CLASSID,1);
147
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300 PetscValidLogicalCollectiveEnum(ds,m,3);
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300 DSCheckValidMat(ds,m,3);
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300 if (!viewer) PetscCall(PetscViewerASCIIGetStdout(PetscObjectComm((PetscObject)ds),&viewer));
150
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300 PetscValidHeaderSpecific(viewer,PETSC_VIEWER_CLASSID,2);
151
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300 PetscCheckSameComm(ds,1,viewer,2);
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300 PetscCall(PetscViewerGetFormat(viewer,&format));
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300 if (format == PETSC_VIEWER_ASCII_INFO || format == PETSC_VIEWER_ASCII_INFO_DETAIL) PetscFunctionReturn(PETSC_SUCCESS);
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300 PetscCall(PetscViewerASCIIUseTabs(viewer,PETSC_FALSE));
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300 PetscCall(DSMatGetSize(ds,m,&rows,&cols));
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300 PetscCall(MatDenseGetArrayRead(ds->omat[m],&M));
157 #if PetscDefined(USE_COMPLEX)
158 /* determine if matrix has all real values */
159
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150 if (m!=DS_MAT_T && m!=DS_MAT_D) {
160 /* determine if matrix has all real values */
161 145 v = M;
162
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2020 for (i=0;i<rows;i++)
163
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20775 for (j=0;j<cols;j++)
164
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18900 if (PetscImaginaryPart(v[i+j*ds->ld])) { allreal = PETSC_FALSE; break; }
165 }
166
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150 if (m==DS_MAT_T) cols=3;
167 #endif
168
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300 if (format == PETSC_VIEWER_ASCII_MATLAB) {
169 ✗ PetscCall(PetscViewerASCIIPrintf(viewer,"%% Size = %" PetscInt_FMT " %" PetscInt_FMT "\n",rows,cols));
170 ✗ PetscCall(PetscViewerASCIIPrintf(viewer,"%s = [\n",DSMatName[m]));
171
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300 } else PetscCall(PetscViewerASCIIPrintf(viewer,"Matrix %s =\n",DSMatName[m]));
172
173
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4200 for (i=0;i<rows;i++) {
174 3900 v = M+i;
175 #if PetscDefined(USE_COMPLEX)
176 1950 vr = (const PetscReal*)M+i; /* handle compact storage, 2nd column is in imaginary part of 1st column */
177 #endif
178
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41850 for (j=0;j<cols;j++) {
179 #if PetscDefined(USE_COMPLEX)
180
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18975 if (m!=DS_MAT_T && m!=DS_MAT_D) {
181
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18900 if (allreal) PetscCall(PetscViewerASCIIPrintf(viewer,"%18.16e ",(double)PetscRealPart(*v)));
182 ✗ else PetscCall(PetscViewerASCIIPrintf(viewer,"%18.16e%+18.16ei ",(double)PetscRealPart(*v),(double)PetscImaginaryPart(*v)));
183
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75 } else PetscCall(PetscViewerASCIIPrintf(viewer,"%18.16e ",(double)*vr));
184 #else
185
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18975 PetscCall(PetscViewerASCIIPrintf(viewer,"%18.16e ",(double)*v));
186 #endif
187 37950 v += ds->ld;
188 #if PetscDefined(USE_COMPLEX)
189
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18975 if (m==DS_MAT_T) vr += ds->ld;
190 #endif
191 }
192
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3900 PetscCall(PetscViewerASCIIPrintf(viewer,"\n"));
193 }
194
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300 PetscCall(MatDenseRestoreArrayRead(ds->omat[m],&M));
195
196
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300 if (format == PETSC_VIEWER_ASCII_MATLAB) PetscCall(PetscViewerASCIIPrintf(viewer,"];\n"));
197
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300 PetscCall(PetscViewerASCIIUseTabs(viewer,PETSC_TRUE));
198
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300 PetscCall(PetscViewerFlush(viewer));
199
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60 PetscFunctionReturn(PETSC_SUCCESS);
200 }
201
202 190463 PetscErrorCode DSSortEigenvalues_Private(DS ds,PetscScalar *wr,PetscScalar *wi,PetscInt *perm,PetscBool isghiep)
203 {
204 190463 PetscScalar re,im,wi0;
205 190463 PetscInt n,i,j,result,tmp1,tmp2=0,d=1;
206
207
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190463 PetscFunctionBegin;
208 190463 n = ds->t; /* sort only first t pairs if truncated */
209 /* insertion sort */
210 190463 i=ds->l+1;
211 #if !PetscDefined(USE_COMPLEX)
212
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93918 if (wi && wi[perm[i-1]]!=0.0) i++; /* initial value is complex */
213 #else
214
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96545 if (isghiep && PetscImaginaryPart(wr[perm[i-1]])!=0.0) i++;
215 #endif
216
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2356358 for (;i<n;i+=d) {
217 2165895 re = wr[perm[i]];
218
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2165895 if (wi) im = wi[perm[i]];
219 else im = 0.0;
220 2165895 tmp1 = perm[i];
221 #if !PetscDefined(USE_COMPLEX)
222
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1133542 if (im!=0.0) { d = 2; tmp2 = perm[i+1]; }
223 else d = 1;
224 #else
225
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1032353 if (isghiep && PetscImaginaryPart(re)!=0.0) { d = 2; tmp2 = perm[i+1]; }
226 else d = 1;
227 #endif
228 2165895 j = i-1;
229
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2165895 if (wi) wi0 = wi[perm[j]];
230 else wi0 = 0.0;
231
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2165895 PetscCall(SlepcSCCompare(ds->sc,re,im,wr[perm[j]],wi0,&result));
232
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8353583 while (result<0 && j>=ds->l) {
233 7733528 perm[j+d] = perm[j];
234 7733528 j--;
235 #if !PetscDefined(USE_COMPLEX)
236
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4945137 if (wi && wi[perm[j+1]]!=0)
237 #else
238
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2788391 if (isghiep && PetscImaginaryPart(wr[perm[j+1]])!=0)
239 #endif
240 204285 { perm[j+d] = perm[j]; j--; }
241
242
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7733528 if (j>=ds->l) {
243
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7113473 if (wi) wi0 = wi[perm[j]];
244 else wi0 = 0.0;
245
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17012896 PetscCall(SlepcSCCompare(ds->sc,re,im,wr[perm[j]],wi0,&result));
246 }
247 }
248 2165895 perm[j+1] = tmp1;
249
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2165895 if (d==2) perm[j+2] = tmp2;
250 }
251
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37014 PetscFunctionReturn(PETSC_SUCCESS);
252 }
253
254 73339 PetscErrorCode DSSortEigenvaluesReal_Private(DS ds,PetscReal *eig,PetscInt *perm)
255 {
256 73339 PetscScalar re;
257 73339 PetscInt i,j,result,tmp,l,n;
258
259
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73339 PetscFunctionBegin;
260 73339 n = ds->t; /* sort only first t pairs if truncated */
261 73339 l = ds->l;
262 /* insertion sort */
263
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997323 for (i=l+1;i<n;i++) {
264 923984 re = eig[perm[i]];
265 923984 j = i-1;
266
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923984 PetscCall(SlepcSCCompare(ds->sc,re,0.0,eig[perm[j]],0.0,&result));
267
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5163693 while (result<0 && j>=l) {
268 4804978 tmp = perm[j]; perm[j] = perm[j+1]; perm[j+1] = tmp; j--;
269
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10533940 if (j>=l) PetscCall(SlepcSCCompare(ds->sc,re,0.0,eig[perm[j]],0.0,&result));
270 }
271 }
272
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13978 PetscFunctionReturn(PETSC_SUCCESS);
273 }
274
275 /*
276 Permute comumns [istart..iend-1] of [mat] according to perm. Columns have length n
277 */
278 220998 PetscErrorCode DSPermuteColumns_Private(DS ds,PetscInt istart,PetscInt iend,PetscInt n,DSMatType mat,PetscInt *perm)
279 {
280 220998 PetscInt i,j,k,p,ld;
281 220998 PetscScalar *Q,rtmp;
282
283
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220998 PetscFunctionBegin;
284 220998 ld = ds->ld;
285
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220998 PetscCall(MatDenseGetArray(ds->omat[mat],&Q));
286
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3031558 for (i=istart;i<iend;i++) {
287 2810560 p = perm[i];
288
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2810560 if (p != i) {
289 990433 j = i + 1;
290
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8066599 while (perm[j] != i) j++;
291 990433 perm[j] = p; perm[i] = i;
292 /* swap columns i and j */
293
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27104253 for (k=0;k<n;k++) {
294 26113820 rtmp = Q[k+p*ld]; Q[k+p*ld] = Q[k+i*ld]; Q[k+i*ld] = rtmp;
295 }
296 }
297 }
298
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220998 PetscCall(MatDenseRestoreArray(ds->omat[mat],&Q));
299
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42867 PetscFunctionReturn(PETSC_SUCCESS);
300 }
301
302 /*
303 The same as DSPermuteColumns_Private but for two matrices [mat1] and [mat2]
304 */
305 3022 PetscErrorCode DSPermuteColumnsTwo_Private(DS ds,PetscInt istart,PetscInt iend,PetscInt n,DSMatType mat1,DSMatType mat2,PetscInt *perm)
306 {
307 3022 PetscInt i,j,k,p,ld;
308 3022 PetscScalar *Q,*Z,rtmp,rtmp2;
309
310
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3022 PetscFunctionBegin;
311 3022 ld = ds->ld;
312
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3022 PetscCall(MatDenseGetArray(ds->omat[mat1],&Q));
313
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3022 PetscCall(MatDenseGetArray(ds->omat[mat2],&Z));
314
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72966 for (i=istart;i<iend;i++) {
315 69944 p = perm[i];
316
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69944 if (p != i) {
317 49427 j = i + 1;
318
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483019 while (perm[j] != i) j++;
319 49427 perm[j] = p; perm[i] = i;
320 /* swap columns i and j */
321
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804887 for (k=0;k<n;k++) {
322 755460 rtmp = Q[k+p*ld]; Q[k+p*ld] = Q[k+i*ld]; Q[k+i*ld] = rtmp;
323 755460 rtmp2 = Z[k+p*ld]; Z[k+p*ld] = Z[k+i*ld]; Z[k+i*ld] = rtmp2;
324 }
325 }
326 }
327
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3022 PetscCall(MatDenseRestoreArray(ds->omat[mat1],&Q));
328
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3022 PetscCall(MatDenseRestoreArray(ds->omat[mat2],&Z));
329
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618 PetscFunctionReturn(PETSC_SUCCESS);
330 }
331
332 /*
333 Permute rows [istart..iend-1] of [mat] according to perm. Rows have length m
334 */
335 ✗ PetscErrorCode DSPermuteRows_Private(DS ds,PetscInt istart,PetscInt iend,PetscInt m,DSMatType mat,PetscInt *perm)
336 {
337 ✗ PetscInt i,j,k,p,ld;
338 ✗ PetscScalar *Q,rtmp;
339
340 ✗ PetscFunctionBegin;
341 ✗ ld = ds->ld;
342 ✗ PetscCall(MatDenseGetArray(ds->omat[mat],&Q));
343 ✗ for (i=istart;i<iend;i++) {
344 ✗ p = perm[i];
345 ✗ if (p != i) {
346 ✗ j = i + 1;
347 ✗ while (perm[j] != i) j++;
348 ✗ perm[j] = p; perm[i] = i;
349 /* swap rows i and j */
350 ✗ for (k=0;k<m;k++) {
351 ✗ rtmp = Q[p+k*ld]; Q[p+k*ld] = Q[i+k*ld]; Q[i+k*ld] = rtmp;
352 }
353 }
354 }
355 ✗ PetscCall(MatDenseRestoreArray(ds->omat[mat],&Q));
356 ✗ PetscFunctionReturn(PETSC_SUCCESS);
357 }
358
359 /*
360 Permute columns [istart..iend-1] of [mat1] and [mat2] according to perm.
361 Columns of [mat1] have length n, columns of [mat2] have length m
362 */
363 27345 PetscErrorCode DSPermuteBoth_Private(DS ds,PetscInt istart,PetscInt iend,PetscInt n,PetscInt m,DSMatType mat1,DSMatType mat2,PetscInt *perm)
364 {
365 27345 PetscInt i,j,k,p,ld;
366 27345 PetscScalar *U,*V,rtmp;
367
368
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27345 PetscFunctionBegin;
369 27345 ld = ds->ld;
370
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27345 PetscCall(MatDenseGetArray(ds->omat[mat1],&U));
371
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27345 PetscCall(MatDenseGetArray(ds->omat[mat2],&V));
372
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336916 for (i=istart;i<iend;i++) {
373 309571 p = perm[i];
374
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309571 if (p != i) {
375 78924 j = i + 1;
376
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719617 while (perm[j] != i) j++;
377 78924 perm[j] = p; perm[i] = i;
378 /* swap columns i and j of U */
379
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3511116 for (k=0;k<n;k++) {
380 3432192 rtmp = U[k+p*ld]; U[k+p*ld] = U[k+i*ld]; U[k+i*ld] = rtmp;
381 }
382 /* swap columns i and j of V */
383
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2297190 for (k=0;k<m;k++) {
384 2218266 rtmp = V[k+p*ld]; V[k+p*ld] = V[k+i*ld]; V[k+i*ld] = rtmp;
385 }
386 }
387 }
388
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27345 PetscCall(MatDenseRestoreArray(ds->omat[mat1],&U));
389
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27345 PetscCall(MatDenseRestoreArray(ds->omat[mat2],&V));
390
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5042 PetscFunctionReturn(PETSC_SUCCESS);
391 }
392
393 /*@
394 DSSetIdentity - Copy the identity (a diagonal matrix with ones on the
395 diagonal) on the active part of a matrix.
396
397 Logically Collective
398
399 Input Parameters:
400 + ds - the direct solver context
401 - mat - the matrix to modify
402
403 Level: intermediate
404
405 .seealso: [](sec:ds), `DSGetMat()`
406 @*/
407 108738 PetscErrorCode DSSetIdentity(DS ds,DSMatType mat)
408 {
409 108738 PetscScalar *A;
410 108738 PetscInt i,ld,n,l;
411
412
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108738 PetscFunctionBegin;
413
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108738 PetscValidHeaderSpecific(ds,DS_CLASSID,1);
414
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108738 PetscValidLogicalCollectiveEnum(ds,mat,2);
415
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108738 DSCheckValidMat(ds,mat,2);
416
417
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108738 PetscCall(DSGetDimensions(ds,&n,&l,NULL,NULL));
418
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108738 PetscCall(DSGetLeadingDimension(ds,&ld));
419
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108738 PetscCall(PetscLogEventBegin(DS_Other,ds,0,0,0));
420
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108738 PetscCall(MatDenseGetArray(ds->omat[mat],&A));
421
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108738 PetscCall(PetscArrayzero(A+l*ld,ld*(n-l)));
422
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1503852 for (i=l;i<n;i++) A[i+i*ld] = 1.0;
423
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108738 PetscCall(MatDenseRestoreArray(ds->omat[mat],&A));
424
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108738 PetscCall(PetscLogEventEnd(DS_Other,ds,0,0,0));
425
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20979 PetscFunctionReturn(PETSC_SUCCESS);
426 }
427
428 /*@
429 DSOrthogonalize - Orthogonalize the columns of a matrix.
430
431 Logically Collective
432
433 Input Parameters:
434 + ds - the direct solver context
435 . mat - a matrix
436 - cols - number of columns to orthogonalize (starting from column zero)
437
438 Output Parameter:
439 . lindcols - (optional) number of linearly independent columns of the matrix
440
441 Level: developer
442
443 .seealso: [](sec:ds), `DSPseudoOrthogonalize()`
444 @*/
445 16807 PetscErrorCode DSOrthogonalize(DS ds,DSMatType mat,PetscInt cols,PetscInt *lindcols)
446 {
447 16807 PetscInt n,l,ld;
448 16807 PetscBLASInt ld_,rA,cA,ltau,lw;
449 16807 PetscScalar *A,*tau,*w,saux,dummy;
450
451
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16807 PetscFunctionBegin;
452
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16807 PetscValidHeaderSpecific(ds,DS_CLASSID,1);
453
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16807 DSCheckAlloc(ds,1);
454
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16807 PetscValidLogicalCollectiveEnum(ds,mat,2);
455
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16807 DSCheckValidMat(ds,mat,2);
456
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16807 PetscValidLogicalCollectiveInt(ds,cols,3);
457
458
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16807 PetscCall(DSGetDimensions(ds,&n,&l,NULL,NULL));
459
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16807 PetscCall(DSGetLeadingDimension(ds,&ld));
460 16807 n = n - l;
461
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16807 PetscCheck(cols<=n,PetscObjectComm((PetscObject)ds),PETSC_ERR_ARG_WRONG,"Invalid number of columns");
462
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16807 if (n == 0 || cols == 0) PetscFunctionReturn(PETSC_SUCCESS);
463
464
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16807 PetscCall(PetscLogEventBegin(DS_Other,ds,0,0,0));
465
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16807 PetscCall(PetscFPTrapPush(PETSC_FP_TRAP_OFF));
466
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16807 PetscCall(MatDenseGetArray(ds->omat[mat],&A));
467
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16807 PetscCall(PetscBLASIntCast(PetscMin(cols,n),&ltau));
468
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16807 PetscCall(PetscBLASIntCast(ld,&ld_));
469
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16807 PetscCall(PetscBLASIntCast(n,&rA));
470
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16807 PetscCall(PetscBLASIntCast(cols,&cA));
471 16807 lw = -1;
472
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16807 PetscCallLAPACKInfo("LAPACKgeqrf",LAPACKgeqrf_(&rA,&cA,A,&ld_,&dummy,&saux,&lw,&info));
473 16807 lw = (PetscBLASInt)PetscRealPart(saux);
474
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16807 PetscCall(DSAllocateWork_Private(ds,lw+ltau,0,0));
475 16807 tau = ds->work;
476 16807 w = &tau[ltau];
477
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16807 PetscCallLAPACKInfo("LAPACKgeqrf",LAPACKgeqrf_(&rA,&cA,&A[ld*l+l],&ld_,tau,w,&lw,&info));
478
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16807 PetscCallLAPACKInfo("LAPACKorgqr",LAPACKorgqr_(&rA,&ltau,&ltau,&A[ld*l+l],&ld_,tau,w,&lw,&info));
479
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16807 if (lindcols) *lindcols = ltau;
480
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16807 PetscCall(PetscFPTrapPop());
481
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16807 PetscCall(MatDenseRestoreArray(ds->omat[mat],&A));
482
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16807 PetscCall(PetscLogEventEnd(DS_Other,ds,0,0,0));
483
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16807 PetscCall(PetscObjectStateIncrease((PetscObject)ds));
484
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16807 PetscFunctionReturn(PETSC_SUCCESS);
485 }
486
487 /*
488 Compute C <- a*A*B + b*C, where
489 ldC, the leading dimension of C,
490 ldA, the leading dimension of A,
491 rA, cA, rows and columns of A,
492 At, if true use the transpose of A instead,
493 ldB, the leading dimension of B,
494 rB, cB, rows and columns of B,
495 Bt, if true use the transpose of B instead
496 */
497 550 static PetscErrorCode SlepcMatDenseMult(PetscScalar *C,PetscInt _ldC,PetscScalar b,PetscScalar a,const PetscScalar *A,PetscInt _ldA,PetscInt rA,PetscInt cA,PetscBool At,const PetscScalar *B,PetscInt _ldB,PetscInt rB,PetscInt cB,PetscBool Bt)
498 {
499 550 PetscInt tmp;
500 550 PetscBLASInt m, n, k, ldA, ldB, ldC;
501 550 const char *N = "N", *T = "C", *qA = N, *qB = N;
502
503
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550 PetscFunctionBegin;
504
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550 if ((rA == 0) || (cB == 0)) PetscFunctionReturn(PETSC_SUCCESS);
505
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550 PetscAssertPointer(C,1);
506
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550 PetscAssertPointer(A,5);
507
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550 PetscAssertPointer(B,10);
508
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550 PetscCall(PetscBLASIntCast(_ldA,&ldA));
509
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550 PetscCall(PetscBLASIntCast(_ldB,&ldB));
510
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550 PetscCall(PetscBLASIntCast(_ldC,&ldC));
511
512 /* Transpose if needed */
513
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550 if (At) tmp = rA, rA = cA, cA = tmp, qA = T;
514
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550 if (Bt) tmp = rB, rB = cB, cB = tmp, qB = T;
515
516 /* Check size */
517
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550 PetscCheck(cA==rB,PETSC_COMM_SELF,PETSC_ERR_PLIB,"Matrix dimensions do not match");
518
519 /* Do stub */
520
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550 if ((rA == 1) && (cA == 1) && (cB == 1)) {
521 ✗ if (!At && !Bt) *C = *A * *B;
522 ✗ else if (At && !Bt) *C = PetscConj(*A) * *B;
523 ✗ else if (!At && Bt) *C = *A * PetscConj(*B);
524 ✗ else *C = PetscConj(*A) * PetscConj(*B);
525 ✗ m = n = k = 1;
526 } else {
527
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550 PetscCall(PetscBLASIntCast(rA,&m));
528
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550 PetscCall(PetscBLASIntCast(cB,&n));
529
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550 PetscCall(PetscBLASIntCast(cA,&k));
530
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550 PetscCallBLAS("BLASgemm",BLASgemm_(qA,qB,&m,&n,&k,&a,(PetscScalar*)A,&ldA,(PetscScalar*)B,&ldB,&b,C,&ldC));
531 }
532
533
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550 PetscCall(PetscLogFlops(2.0*m*n*k));
534
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550 PetscFunctionReturn(PETSC_SUCCESS);
535 }
536
537 /*@
538 DSPseudoOrthogonalize - Orthogonalize the columns of a matrix with Modified
539 Gram-Schmidt in an indefinite inner product space defined by a signature.
540
541 Logically Collective
542
543 Input Parameters:
544 + ds - the direct solver context
545 . mat - the matrix
546 . cols - number of columns to orthogonalize (starting from column zero)
547 - s - the signature that defines the inner product
548
549 Output Parameters:
550 + lindcols - (optional) linearly independent columns of the matrix
551 - ns - (optional) the new signature of the vectors
552
553 Note:
554 After the call the matrix satisfies $A^*\Omega A = \tilde\Omega$, where
555 $\Omega$ is the input signature, represented as a list of $\pm 1$ values
556 in `s`, and the new signature $\tilde\Omega$ is stored similarly in `ns`.
557
558 Level: developer
559
560 .seealso: [](sec:ds), `DSOrthogonalize()`
561 @*/
562 10 PetscErrorCode DSPseudoOrthogonalize(DS ds,DSMatType mat,PetscInt cols,PetscReal s[],PetscInt *lindcols,PetscReal ns[])
563 {
564 10 PetscInt i,j,k,l,n,ld;
565 10 PetscBLASInt one=1,zero=0,rA_,ld_;
566 10 PetscScalar *A,*A_,*m,*h,nr0;
567 10 PetscReal nr_o,nr,nr_abs,*ns_,done=1.0;
568
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10 PetscFunctionBegin;
570
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10 PetscValidHeaderSpecific(ds,DS_CLASSID,1);
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10 DSCheckAlloc(ds,1);
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10 PetscValidLogicalCollectiveEnum(ds,mat,2);
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10 DSCheckValidMat(ds,mat,2);
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10 PetscValidLogicalCollectiveInt(ds,cols,3);
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10 PetscAssertPointer(s,4);
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10 PetscCall(DSGetDimensions(ds,&n,&l,NULL,NULL));
577
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10 PetscCall(DSGetLeadingDimension(ds,&ld));
578 10 n = n - l;
579
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10 PetscCheck(cols<=n,PetscObjectComm((PetscObject)ds),PETSC_ERR_ARG_WRONG,"Invalid number of columns");
580
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10 if (n == 0 || cols == 0) PetscFunctionReturn(PETSC_SUCCESS);
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10 PetscCall(PetscLogEventBegin(DS_Other,ds,0,0,0));
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10 PetscCall(PetscBLASIntCast(n,&rA_));
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10 PetscCall(PetscBLASIntCast(ld,&ld_));
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10 PetscCall(MatDenseGetArray(ds->omat[mat],&A_));
585 10 A = &A_[ld*l+l];
586
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20 PetscCall(DSAllocateWork_Private(ds,n+cols,ns?0:cols,0));
587 10 m = ds->work;
588 10 h = &m[n];
589
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10 ns_ = ns ? ns : ds->rwork;
590
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110 for (i=0; i<cols; i++) {
591 /* m <- diag(s)*A[i] */
592
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1100 for (k=0; k<n; k++) m[k] = s[k]*A[k+i*ld];
593 /* nr_o <- mynorm(A[i]'*m), mynorm(x) = sign(x)*sqrt(|x|) */
594
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100 PetscCall(SlepcMatDenseMult(&nr0,1,0.0,1.0,&A[ld*i],ld,n,1,PETSC_TRUE,m,n,n,1,PETSC_FALSE));
595
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100 nr = nr_o = PetscSign(PetscRealPart(nr0))*PetscSqrtReal(PetscAbsScalar(nr0));
596
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160 for (j=0; j<3 && i>0; j++) {
597 /* h <- A[0:i-1]'*m */
598
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150 PetscCall(SlepcMatDenseMult(h,i,0.0,1.0,A,ld,n,i,PETSC_TRUE,m,n,n,1,PETSC_FALSE));
599 /* h <- diag(ns)*h */
600
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990 for (k=0; k<i; k++) h[k] *= ns_[k];
601 /* A[i] <- A[i] - A[0:i-1]*h */
602
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150 PetscCall(SlepcMatDenseMult(&A[ld*i],ld,1.0,-1.0,A,ld,n,i,PETSC_FALSE,h,i,i,1,PETSC_FALSE));
603 /* m <- diag(s)*A[i] */
604
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1650 for (k=0; k<n; k++) m[k] = s[k]*A[k+i*ld];
605 /* nr_o <- mynorm(A[i]'*m) */
606
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150 PetscCall(SlepcMatDenseMult(&nr0,1,0.0,1.0,&A[ld*i],ld,n,1,PETSC_TRUE,m,n,n,1,PETSC_FALSE));
607
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150 nr = PetscSign(PetscRealPart(nr0))*PetscSqrtReal(PetscAbsScalar(nr0));
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150 PetscCheck(PetscAbs(nr)>PETSC_MACHINE_EPSILON,PETSC_COMM_SELF,PETSC_ERR_CONV_FAILED,"Linear dependency detected");
609
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150 if (PetscAbs(nr) > 0.7*PetscAbs(nr_o)) break;
610 60 nr_o = nr;
611 }
612
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100 ns_[i] = PetscSign(nr);
613 /* A[i] <- A[i]/|nr| */
614
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100 nr_abs = PetscAbs(nr);
615
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100 PetscCallLAPACKInfo("LAPACKlascl",LAPACKlascl_("G",&zero,&zero,&nr_abs,&done,&rA_,&one,A+i*ld,&ld_,&info));
616 }
617
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10 PetscCall(MatDenseRestoreArray(ds->omat[mat],&A_));
618
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10 PetscCall(PetscLogEventEnd(DS_Other,ds,0,0,0));
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10 PetscCall(PetscObjectStateIncrease((PetscObject)ds));
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10 if (lindcols) *lindcols = cols;
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2 PetscFunctionReturn(PETSC_SUCCESS);
622 }
623