Actual source code: cdiagonal.c
1: #include <petsc/private/matimpl.h>
3: typedef struct {
4: PetscScalar diag;
5: } Mat_ConstantDiagonal;
7: static PetscErrorCode MatAXPY_ConstantDiagonal(Mat Y, PetscScalar a, Mat X, MatStructure str)
8: {
9: Mat_ConstantDiagonal *yctx = (Mat_ConstantDiagonal *)Y->data;
10: Mat_ConstantDiagonal *xctx = (Mat_ConstantDiagonal *)X->data;
12: PetscFunctionBegin;
13: yctx->diag += a * xctx->diag;
14: PetscFunctionReturn(PETSC_SUCCESS);
15: }
17: static PetscErrorCode MatEqual_ConstantDiagonal(Mat Y, Mat X, PetscBool *equal)
18: {
19: Mat_ConstantDiagonal *yctx = (Mat_ConstantDiagonal *)Y->data;
20: Mat_ConstantDiagonal *xctx = (Mat_ConstantDiagonal *)X->data;
22: PetscFunctionBegin;
23: *equal = (yctx->diag == xctx->diag) ? PETSC_TRUE : PETSC_FALSE;
24: PetscFunctionReturn(PETSC_SUCCESS);
25: }
27: static PetscErrorCode MatGetRow_ConstantDiagonal(Mat A, PetscInt row, PetscInt *ncols, PetscInt *cols[], PetscScalar *vals[])
28: {
29: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)A->data;
31: PetscFunctionBegin;
32: if (ncols) *ncols = 1;
33: if (cols) {
34: PetscCall(PetscMalloc1(1, cols));
35: (*cols)[0] = row;
36: }
37: if (vals) {
38: PetscCall(PetscMalloc1(1, vals));
39: (*vals)[0] = ctx->diag;
40: }
41: PetscFunctionReturn(PETSC_SUCCESS);
42: }
44: static PetscErrorCode MatRestoreRow_ConstantDiagonal(Mat A, PetscInt row, PetscInt *ncols, PetscInt *cols[], PetscScalar *vals[])
45: {
46: PetscFunctionBegin;
47: if (cols) PetscCall(PetscFree(*cols));
48: if (vals) PetscCall(PetscFree(*vals));
49: PetscFunctionReturn(PETSC_SUCCESS);
50: }
52: static PetscErrorCode MatMultAdd_ConstantDiagonal(Mat mat, Vec v1, Vec v2, Vec v3)
53: {
54: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)mat->data;
56: PetscFunctionBegin;
57: if (v2 == v3) PetscCall(VecAXPBY(v3, ctx->diag, 1.0, v1));
58: else PetscCall(VecAXPBYPCZ(v3, ctx->diag, 1.0, 0.0, v1, v2));
59: PetscFunctionReturn(PETSC_SUCCESS);
60: }
62: static PetscErrorCode MatMultHermitianTransposeAdd_ConstantDiagonal(Mat mat, Vec v1, Vec v2, Vec v3)
63: {
64: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)mat->data;
66: PetscFunctionBegin;
67: if (v2 == v3) PetscCall(VecAXPBY(v3, PetscConj(ctx->diag), 1.0, v1));
68: else PetscCall(VecAXPBYPCZ(v3, PetscConj(ctx->diag), 1.0, 0.0, v1, v2));
69: PetscFunctionReturn(PETSC_SUCCESS);
70: }
72: static PetscErrorCode MatNorm_ConstantDiagonal(Mat A, NormType type, PetscReal *nrm)
73: {
74: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)A->data;
76: PetscFunctionBegin;
77: PetscCheck(type == NORM_FROBENIUS || type == NORM_2 || type == NORM_1 || type == NORM_INFINITY, PetscObjectComm((PetscObject)A), PETSC_ERR_SUP, "Unsupported norm");
78: *nrm = PetscAbsScalar(ctx->diag);
79: PetscFunctionReturn(PETSC_SUCCESS);
80: }
82: static PetscErrorCode MatCreateSubMatrices_ConstantDiagonal(Mat A, PetscInt n, const IS irow[], const IS icol[], MatReuse scall, Mat *submat[])
83: {
84: Mat B;
86: PetscFunctionBegin;
87: PetscCall(MatConvert(A, MATAIJ, MAT_INITIAL_MATRIX, &B));
88: PetscCall(MatCreateSubMatrices(B, n, irow, icol, scall, submat));
89: PetscCall(MatDestroy(&B));
90: PetscFunctionReturn(PETSC_SUCCESS);
91: }
93: static PetscErrorCode MatDuplicate_ConstantDiagonal(Mat A, MatDuplicateOption op, Mat *B)
94: {
95: Mat_ConstantDiagonal *actx = (Mat_ConstantDiagonal *)A->data;
97: PetscFunctionBegin;
98: PetscCall(MatCreate(PetscObjectComm((PetscObject)A), B));
99: PetscCall(MatSetSizes(*B, A->rmap->n, A->cmap->n, A->rmap->N, A->cmap->N));
100: PetscCall(MatSetBlockSizesFromMats(*B, A, A));
101: PetscCall(MatSetType(*B, MATCONSTANTDIAGONAL));
102: PetscCall(PetscLayoutReference(A->rmap, &(*B)->rmap));
103: PetscCall(PetscLayoutReference(A->cmap, &(*B)->cmap));
104: if (op == MAT_COPY_VALUES) {
105: Mat_ConstantDiagonal *bctx = (Mat_ConstantDiagonal *)(*B)->data;
106: bctx->diag = actx->diag;
107: }
108: PetscFunctionReturn(PETSC_SUCCESS);
109: }
111: static PetscErrorCode MatDestroy_ConstantDiagonal(Mat mat)
112: {
113: PetscFunctionBegin;
114: PetscCall(PetscFree(mat->data));
115: PetscCall(PetscObjectComposeFunction((PetscObject)mat, "MatConstantDiagonalGetConstant_C", NULL));
116: PetscCall(PetscObjectComposeFunction((PetscObject)mat, "MatProductSetFromOptions_constantdiagonal_constantdiagonal_C", NULL));
117: PetscCall(PetscObjectComposeFunction((PetscObject)mat, "MatProductSetFromOptions_constantdiagonal_diagonal_C", NULL));
118: PetscCall(PetscObjectComposeFunction((PetscObject)mat, "MatProductSetFromOptions_diagonal_constantdiagonal_C", NULL));
119: PetscCall(PetscObjectComposeFunction((PetscObject)mat, "MatProductSetFromOptions_constantdiagonal_seqdense_C", NULL));
120: PetscCall(PetscObjectComposeFunction((PetscObject)mat, "MatProductSetFromOptions_constantdiagonal_mpidense_C", NULL));
121: #if PetscDefined(HAVE_CUDA)
122: PetscCall(PetscObjectComposeFunction((PetscObject)mat, "MatProductSetFromOptions_constantdiagonal_seqdensecuda_C", NULL));
123: PetscCall(PetscObjectComposeFunction((PetscObject)mat, "MatProductSetFromOptions_constantdiagonal_mpidensecuda_C", NULL));
124: #endif
125: #if PetscDefined(HAVE_HIP)
126: PetscCall(PetscObjectComposeFunction((PetscObject)mat, "MatProductSetFromOptions_constantdiagonal_seqdensehip_C", NULL));
127: PetscCall(PetscObjectComposeFunction((PetscObject)mat, "MatProductSetFromOptions_constantdiagonal_mpidensehip_C", NULL));
128: #endif
129: PetscCall(PetscObjectComposeFunction((PetscObject)mat, "MatProductSetFromOptions_anytype_C", NULL));
130: PetscFunctionReturn(PETSC_SUCCESS);
131: }
133: static PetscErrorCode MatView_ConstantDiagonal(Mat J, PetscViewer viewer)
134: {
135: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)J->data;
136: PetscBool isascii;
138: PetscFunctionBegin;
139: PetscCall(PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERASCII, &isascii));
140: if (isascii) {
141: PetscViewerFormat format;
143: PetscCall(PetscViewerGetFormat(viewer, &format));
144: if (format == PETSC_VIEWER_ASCII_FACTOR_INFO || format == PETSC_VIEWER_ASCII_INFO) PetscFunctionReturn(PETSC_SUCCESS);
145: if (PetscImaginaryPart(ctx->diag) == 0) {
146: PetscCall(PetscViewerASCIIPrintf(viewer, "Diagonal value: %g\n", (double)PetscRealPart(ctx->diag)));
147: } else {
148: PetscCall(PetscViewerASCIIPrintf(viewer, "Diagonal value: %g + i %g\n", (double)PetscRealPart(ctx->diag), (double)PetscImaginaryPart(ctx->diag)));
149: }
150: }
151: PetscFunctionReturn(PETSC_SUCCESS);
152: }
154: static PetscErrorCode MatMult_ConstantDiagonal(Mat J, Vec x, Vec y)
155: {
156: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)J->data;
158: PetscFunctionBegin;
159: PetscCall(VecAXPBY(y, ctx->diag, 0.0, x));
160: PetscFunctionReturn(PETSC_SUCCESS);
161: }
163: static PetscErrorCode MatMultHermitianTranspose_ConstantDiagonal(Mat J, Vec x, Vec y)
164: {
165: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)J->data;
167: PetscFunctionBegin;
168: PetscCall(VecAXPBY(y, PetscConj(ctx->diag), 0.0, x));
169: PetscFunctionReturn(PETSC_SUCCESS);
170: }
172: static PetscErrorCode MatGetDiagonal_ConstantDiagonal(Mat J, Vec x)
173: {
174: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)J->data;
176: PetscFunctionBegin;
177: PetscCall(VecSet(x, ctx->diag));
178: PetscFunctionReturn(PETSC_SUCCESS);
179: }
181: static PetscErrorCode MatShift_ConstantDiagonal(Mat Y, PetscScalar a)
182: {
183: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)Y->data;
185: PetscFunctionBegin;
186: ctx->diag += a;
187: PetscFunctionReturn(PETSC_SUCCESS);
188: }
190: static PetscErrorCode MatScale_ConstantDiagonal(Mat Y, PetscScalar a)
191: {
192: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)Y->data;
194: PetscFunctionBegin;
195: ctx->diag *= a;
196: PetscFunctionReturn(PETSC_SUCCESS);
197: }
199: static PetscErrorCode MatZeroEntries_ConstantDiagonal(Mat Y)
200: {
201: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)Y->data;
203: PetscFunctionBegin;
204: ctx->diag = 0.0;
205: PetscFunctionReturn(PETSC_SUCCESS);
206: }
208: static PetscErrorCode MatConjugate_ConstantDiagonal(Mat Y)
209: {
210: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)Y->data;
212: PetscFunctionBegin;
213: ctx->diag = PetscConj(ctx->diag);
214: PetscFunctionReturn(PETSC_SUCCESS);
215: }
217: static PetscErrorCode MatTranspose_ConstantDiagonal(Mat A, MatReuse reuse, Mat *matout)
218: {
219: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)A->data;
221: PetscFunctionBegin;
222: if (reuse == MAT_INPLACE_MATRIX) {
223: PetscLayout tmplayout = A->rmap;
225: A->rmap = A->cmap;
226: A->cmap = tmplayout;
227: } else {
228: if (reuse == MAT_INITIAL_MATRIX) {
229: PetscCall(MatCreateConstantDiagonal(PetscObjectComm((PetscObject)A), A->cmap->n, A->rmap->n, A->cmap->N, A->rmap->N, ctx->diag, matout));
230: } else {
231: PetscCall(MatZeroEntries(*matout));
232: PetscCall(MatShift(*matout, ctx->diag));
233: }
234: }
235: PetscFunctionReturn(PETSC_SUCCESS);
236: }
238: static PetscErrorCode MatSetRandom_ConstantDiagonal(Mat A, PetscRandom rand)
239: {
240: PetscMPIInt rank;
241: MPI_Comm comm;
242: PetscScalar v = 0.0;
243: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)A->data;
245: PetscFunctionBegin;
246: PetscCall(PetscObjectGetComm((PetscObject)A, &comm));
247: PetscCallMPI(MPI_Comm_rank(comm, &rank));
248: if (!rank) PetscCall(PetscRandomGetValue(rand, &v));
249: PetscCallMPI(MPI_Bcast(&v, 1, MPIU_SCALAR, 0, comm));
250: ctx->diag = v;
251: PetscFunctionReturn(PETSC_SUCCESS);
252: }
254: static PetscErrorCode MatSolve_ConstantDiagonal(Mat matin, Vec b, Vec x)
255: {
256: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)matin->data;
258: PetscFunctionBegin;
259: if (ctx->diag == 0.0) matin->factorerrortype = MAT_FACTOR_NUMERIC_ZEROPIVOT;
260: else matin->factorerrortype = MAT_FACTOR_NOERROR;
261: PetscCall(VecAXPBY(x, 1.0 / ctx->diag, 0.0, b));
262: PetscFunctionReturn(PETSC_SUCCESS);
263: }
265: static PetscErrorCode MatSOR_ConstantDiagonal(Mat matin, Vec x, PetscReal omega, MatSORType flag, PetscReal fshift, PetscInt its, PetscInt lits, Vec y)
266: {
267: PetscFunctionBegin;
268: PetscCall(MatSolve_ConstantDiagonal(matin, x, y));
269: PetscFunctionReturn(PETSC_SUCCESS);
270: }
272: static PetscErrorCode MatGetInfo_ConstantDiagonal(Mat A, MatInfoType flag, MatInfo *info)
273: {
274: PetscFunctionBegin;
275: info->block_size = 1.0;
276: info->nz_allocated = 1.0;
277: info->nz_used = 1.0;
278: info->nz_unneeded = 0.0;
279: info->assemblies = A->num_ass;
280: info->mallocs = 0.0;
281: info->memory = 0; /* REVIEW ME */
282: if (A->factortype) {
283: info->fill_ratio_given = 1.0;
284: info->fill_ratio_needed = 1.0;
285: info->factor_mallocs = 0.0;
286: } else {
287: info->fill_ratio_given = 0;
288: info->fill_ratio_needed = 0;
289: info->factor_mallocs = 0;
290: }
291: PetscFunctionReturn(PETSC_SUCCESS);
292: }
294: /*@
295: MatCreateConstantDiagonal - Creates a matrix with a uniform value along the diagonal
297: Collective
299: Input Parameters:
300: + comm - MPI communicator
301: . m - number of local rows (or `PETSC_DECIDE` to have calculated if `M` is given)
302: This value should be the same as the local size used in creating the
303: y vector for the matrix-vector product y = Ax.
304: . n - This value should be the same as the local size used in creating the
305: x vector for the matrix-vector product y = Ax. (or `PETSC_DECIDE` to have
306: calculated if `N` is given) For square matrices n is almost always `m`.
307: . M - number of global rows (or `PETSC_DETERMINE` to have calculated if m is given)
308: . N - number of global columns (or `PETSC_DETERMINE` to have calculated if n is given)
309: - diag - the diagonal value
311: Output Parameter:
312: . J - the diagonal matrix
314: Level: advanced
316: Notes:
317: Only supports square matrices with the same number of local rows and columns
319: .seealso: [](ch_matrices), `Mat`, `MatDestroy()`, `MATCONSTANTDIAGONAL`, `MatScale()`, `MatShift()`, `MatMult()`, `MatGetDiagonal()`, `MatGetFactor()`, `MatSolve()`
320: @*/
321: PetscErrorCode MatCreateConstantDiagonal(MPI_Comm comm, PetscInt m, PetscInt n, PetscInt M, PetscInt N, PetscScalar diag, Mat *J)
322: {
323: PetscFunctionBegin;
324: PetscCall(MatCreate(comm, J));
325: PetscCall(MatSetSizes(*J, m, n, M, N));
326: PetscCall(MatSetType(*J, MATCONSTANTDIAGONAL));
327: PetscCall(MatShift(*J, diag));
328: PetscCall(MatSetUp(*J));
329: PetscFunctionReturn(PETSC_SUCCESS);
330: }
332: /*@
333: MatConstantDiagonalGetConstant - Get the scalar constant of a constant diagonal matrix
335: Not collective
337: Input Parameter:
338: . mat - a `MATCONSTANTDIAGONAL`
340: Output Parameter:
341: . value - the scalar value
343: Level: developer
345: .seealso: [](ch_matrices), `Mat`, `MatDestroy()`, `MATCONSTANTDIAGONAL`
346: @*/
347: PetscErrorCode MatConstantDiagonalGetConstant(Mat mat, PetscScalar *value)
348: {
349: PetscFunctionBegin;
350: PetscUseMethod(mat, "MatConstantDiagonalGetConstant_C", (Mat, PetscScalar *), (mat, value));
351: PetscFunctionReturn(PETSC_SUCCESS);
352: }
354: static PetscErrorCode MatConstantDiagonalGetConstant_ConstantDiagonal(Mat mat, PetscScalar *value)
355: {
356: Mat_ConstantDiagonal *ctx = (Mat_ConstantDiagonal *)mat->data;
358: PetscFunctionBegin;
359: *value = ctx->diag;
360: PetscFunctionReturn(PETSC_SUCCESS);
361: }
363: static PetscErrorCode MatProductNumeric_ConstDiag_Dense(Mat C)
364: {
365: Mat_ConstantDiagonal *p = (Mat_ConstantDiagonal *)C->product->A->data;
367: PetscFunctionBegin;
368: MatCheckProduct(C, 1);
369: PetscCall(MatCopy(C->product->B, C, SAME_NONZERO_PATTERN));
370: PetscCall(MatScale(C, p->diag));
371: PetscFunctionReturn(PETSC_SUCCESS);
372: }
374: static PetscErrorCode MatProductSymbolic_ConstDiag_Dense(Mat C)
375: {
376: Mat A, B;
377: PetscInt n, N, m, M;
379: PetscFunctionBegin;
380: MatCheckProduct(C, 1);
381: PetscCheck(!C->product->data, PetscObjectComm((PetscObject)C), PETSC_ERR_PLIB, "Product data not empty");
382: A = C->product->A;
383: B = C->product->B;
384: PetscCall(MatGetLocalSize(B, NULL, &n));
385: PetscCall(MatGetSize(B, NULL, &N));
386: PetscCall(MatGetLocalSize(A, &m, NULL));
387: PetscCall(MatGetSize(A, &M, NULL));
388: PetscCall(MatSetSizes(C, m, n, M, N));
389: PetscCall(MatSetType(C, ((PetscObject)B)->type_name));
390: PetscCall(MatSetUp(C));
391: C->ops->productnumeric = MatProductNumeric_ConstDiag_Dense;
392: PetscFunctionReturn(PETSC_SUCCESS);
393: }
395: /* PtAP for constantdiagonal * constantdiagonal: C = alpha * beta^2 * I */
396: static PetscErrorCode MatProductNumeric_PtAP_ConstDiag_ConstDiag(Mat C)
397: {
398: Mat A = C->product->A, P = C->product->B;
399: Mat_ConstantDiagonal *a = (Mat_ConstantDiagonal *)A->data, *p = (Mat_ConstantDiagonal *)P->data, *c = (Mat_ConstantDiagonal *)C->data;
401: PetscFunctionBegin;
402: MatCheckProduct(C, 1);
403: c->diag = a->diag * p->diag * p->diag;
404: PetscFunctionReturn(PETSC_SUCCESS);
405: }
407: static PetscErrorCode MatProductSymbolic_PtAP_ConstDiag_ConstDiag(Mat C)
408: {
409: Mat P = C->product->B;
411: PetscFunctionBegin;
412: MatCheckProduct(C, 1);
413: PetscCheck(!C->product->data, PetscObjectComm((PetscObject)C), PETSC_ERR_PLIB, "Product data not empty");
414: PetscCall(MatSetSizes(C, P->cmap->n, P->cmap->n, P->cmap->N, P->cmap->N));
415: PetscCall(MatSetType(C, MATCONSTANTDIAGONAL));
416: C->assembled = PETSC_TRUE;
417: C->ops->productnumeric = MatProductNumeric_PtAP_ConstDiag_ConstDiag;
418: PetscFunctionReturn(PETSC_SUCCESS);
419: }
421: /* PtAP for constantdiagonal A and diagonal P: C_i = alpha * p_i^2 */
422: static PetscErrorCode MatProductNumeric_PtAP_ConstDiag_Diagonal(Mat C)
423: {
424: Mat A = C->product->A, P = C->product->B;
425: Mat_ConstantDiagonal *a = (Mat_ConstantDiagonal *)A->data;
426: Vec pdiag, cdiag;
428: PetscFunctionBegin;
429: MatCheckProduct(C, 1);
430: PetscCall(MatDiagonalGetDiagonal(P, &pdiag));
431: PetscCall(MatDiagonalGetDiagonal(C, &cdiag));
432: PetscCall(VecPointwiseMult(cdiag, pdiag, pdiag));
433: PetscCall(VecScale(cdiag, a->diag));
434: PetscCall(MatDiagonalRestoreDiagonal(C, &cdiag));
435: PetscCall(MatDiagonalRestoreDiagonal(P, &pdiag));
436: PetscFunctionReturn(PETSC_SUCCESS);
437: }
439: static PetscErrorCode MatProductSymbolic_PtAP_ConstDiag_Diagonal(Mat C)
440: {
441: Mat P = C->product->B;
442: Vec pdiag, cdiag;
444: PetscFunctionBegin;
445: MatCheckProduct(C, 1);
446: PetscCheck(!C->product->data, PetscObjectComm((PetscObject)C), PETSC_ERR_PLIB, "Product data not empty");
447: PetscCall(MatSetSizes(C, P->cmap->n, P->cmap->n, P->cmap->N, P->cmap->N));
448: PetscCall(MatSetType(C, MATDIAGONAL));
449: PetscCall(MatDiagonalGetDiagonal(P, &pdiag));
450: PetscCall(VecDuplicate(pdiag, &cdiag));
451: PetscCall(MatDiagonalSetDiagonal(C, cdiag));
452: PetscCall(VecDestroy(&cdiag));
453: PetscCall(MatDiagonalRestoreDiagonal(P, &pdiag));
454: C->assembled = PETSC_TRUE;
455: C->ops->productnumeric = MatProductNumeric_PtAP_ConstDiag_Diagonal;
456: PetscFunctionReturn(PETSC_SUCCESS);
457: }
459: /* PtAP for diagonal A and constantdiagonal P: C_i = beta^2 * a_i */
460: static PetscErrorCode MatProductNumeric_PtAP_Diagonal_ConstDiag(Mat C)
461: {
462: Mat A = C->product->A, P = C->product->B;
463: Mat_ConstantDiagonal *p = (Mat_ConstantDiagonal *)P->data;
464: Vec adiag, cdiag;
466: PetscFunctionBegin;
467: MatCheckProduct(C, 1);
468: PetscCall(MatDiagonalGetDiagonal(A, &adiag));
469: PetscCall(MatDiagonalGetDiagonal(C, &cdiag));
470: PetscCall(VecCopy(adiag, cdiag));
471: PetscCall(VecScale(cdiag, p->diag * p->diag));
472: PetscCall(MatDiagonalRestoreDiagonal(C, &cdiag));
473: PetscCall(MatDiagonalRestoreDiagonal(A, &adiag));
474: PetscFunctionReturn(PETSC_SUCCESS);
475: }
477: static PetscErrorCode MatProductSymbolic_PtAP_Diagonal_ConstDiag(Mat C)
478: {
479: Mat A = C->product->A, P = C->product->B;
480: Vec adiag, cdiag;
482: PetscFunctionBegin;
483: MatCheckProduct(C, 1);
484: PetscCheck(!C->product->data, PetscObjectComm((PetscObject)C), PETSC_ERR_PLIB, "Product data not empty");
485: PetscCall(MatSetSizes(C, P->cmap->n, P->cmap->n, P->cmap->N, P->cmap->N));
486: PetscCall(MatSetType(C, MATDIAGONAL));
487: /* Duplicate A's diagonal Vec so C inherits the correct VecType (e.g., Kokkos, CUDA, HIP) */
488: PetscCall(MatDiagonalGetDiagonal(A, &adiag));
489: PetscCall(VecDuplicate(adiag, &cdiag));
490: PetscCall(MatDiagonalSetDiagonal(C, cdiag));
491: PetscCall(VecDestroy(&cdiag));
492: PetscCall(MatDiagonalRestoreDiagonal(A, &adiag));
493: C->assembled = PETSC_TRUE;
494: C->ops->productnumeric = MatProductNumeric_PtAP_Diagonal_ConstDiag;
495: PetscFunctionReturn(PETSC_SUCCESS);
496: }
498: /* PtAP for any (non-diagonal) A and constantdiagonal P: C = beta^2 * A */
499: static PetscErrorCode MatProductNumeric_PtAP_Anytype_ConstDiag(Mat C)
500: {
501: Mat A = C->product->A, P = C->product->B;
502: Mat_ConstantDiagonal *p = (Mat_ConstantDiagonal *)P->data;
504: PetscFunctionBegin;
505: MatCheckProduct(C, 1);
506: PetscCall(MatCopy(A, C, SAME_NONZERO_PATTERN));
507: PetscCall(MatScale(C, p->diag * p->diag));
508: PetscFunctionReturn(PETSC_SUCCESS);
509: }
511: static PetscErrorCode MatProductSymbolic_PtAP_Anytype_ConstDiag(Mat C)
512: {
513: Mat A = C->product->A;
514: Mat_Product *product = C->product;
515: Mat Cwork;
517: PetscFunctionBegin;
518: MatCheckProduct(C, 1);
519: PetscCheck(!C->product->data, PetscObjectComm((PetscObject)C), PETSC_ERR_PLIB, "Product data not empty");
520: PetscCall(MatDuplicate(A, MAT_DO_NOT_COPY_VALUES, &Cwork));
521: C->product = NULL;
522: PetscCall(MatHeaderReplace(C, &Cwork));
523: C->product = product;
524: C->ops->productnumeric = MatProductNumeric_PtAP_Anytype_ConstDiag;
525: PetscFunctionReturn(PETSC_SUCCESS);
526: }
528: /* PtAP for constantdiagonal A and any non-diagonal P: C = alpha * P^T * P */
529: typedef struct {
530: Mat PtP; /* P^T * P result via MatProduct AtB */
531: PetscObjectState pnnzstate; /* P's nonzero state when inner symbolic was last built */
532: } MatProductCtx_PtAP_ConstDiag_Anytype;
534: static PetscErrorCode MatProductCtxDestroy_PtAP_ConstDiag_Anytype(PetscCtxRt data)
535: {
536: MatProductCtx_PtAP_ConstDiag_Anytype *ctx = *(MatProductCtx_PtAP_ConstDiag_Anytype **)data;
538: PetscFunctionBegin;
539: PetscCall(MatDestroy(&ctx->PtP));
540: PetscCall(PetscFree(ctx));
541: PetscFunctionReturn(PETSC_SUCCESS);
542: }
544: static PetscErrorCode MatProductNumeric_PtAP_ConstDiag_Anytype(Mat C)
545: {
546: Mat_Product *product = C->product;
547: Mat A = product->A, P = product->B;
548: MatProductCtx_PtAP_ConstDiag_Anytype *ctx = (MatProductCtx_PtAP_ConstDiag_Anytype *)product->data;
549: Mat_ConstantDiagonal *a = (Mat_ConstantDiagonal *)A->data;
550: PetscObjectState pnnzstate;
552: PetscFunctionBegin;
553: MatCheckProduct(C, 1);
554: /* Rebuild inner symbolic if P's nonzero structure has changed */
555: PetscCall(MatGetNonzeroState(P, &pnnzstate));
556: if (pnnzstate != ctx->pnnzstate) {
557: PetscCall(MatDestroy(&ctx->PtP));
558: PetscCall(MatProductCreate(P, P, NULL, &ctx->PtP));
559: PetscCall(MatProductSetType(ctx->PtP, MATPRODUCT_AtB));
560: PetscCall(MatProductSetFill(ctx->PtP, product->fill));
561: PetscCall(MatProductSetFromOptions(ctx->PtP));
562: PetscCall(MatProductSymbolic(ctx->PtP));
563: ctx->pnnzstate = pnnzstate;
564: }
565: /* Compute P^T * P */
566: PetscCall(MatProductNumeric(ctx->PtP));
567: PetscCall(MatCopy(ctx->PtP, C, SAME_NONZERO_PATTERN));
568: PetscCall(MatScale(C, a->diag));
569: PetscFunctionReturn(PETSC_SUCCESS);
570: }
572: static PetscErrorCode MatProductSymbolic_PtAP_ConstDiag_Anytype(Mat C)
573: {
574: Mat_Product *product = C->product;
575: Mat P = product->B;
576: MatProductCtx_PtAP_ConstDiag_Anytype *ctx;
577: Mat Cwork;
579: PetscFunctionBegin;
580: MatCheckProduct(C, 1);
581: PetscCheck(!C->product->data, PetscObjectComm((PetscObject)C), PETSC_ERR_PLIB, "Product data not empty");
582: PetscCall(PetscNew(&ctx));
584: /* PtP = P^T * P (symbolic) */
585: PetscCall(MatProductCreate(P, P, NULL, &ctx->PtP));
586: PetscCall(MatProductSetType(ctx->PtP, MATPRODUCT_AtB));
587: PetscCall(MatProductSetFill(ctx->PtP, product->fill));
588: PetscCall(MatProductSetFromOptions(ctx->PtP));
589: PetscCall(MatProductSymbolic(ctx->PtP));
591: /* Record P's nonzero state so numeric phase can detect structural changes */
592: PetscCall(MatGetNonzeroState(P, &ctx->pnnzstate));
594: /* Set up C with the same structure as PtP */
595: PetscCall(MatDuplicate(ctx->PtP, MAT_DO_NOT_COPY_VALUES, &Cwork));
596: C->product = NULL;
597: PetscCall(MatHeaderReplace(C, &Cwork));
598: C->product = product;
599: PetscCall(MatSetOption(C, MAT_NO_OFF_PROC_ENTRIES, PETSC_TRUE));
600: PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY));
601: PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY));
602: product->data = ctx;
603: product->destroy = MatProductCtxDestroy_PtAP_ConstDiag_Anytype;
604: C->ops->productnumeric = MatProductNumeric_PtAP_ConstDiag_Anytype;
605: PetscFunctionReturn(PETSC_SUCCESS);
606: }
608: /* AB for MATCONSTANTDIAGONAL A and any non-diagonal B: C = alpha * B */
609: static PetscErrorCode MatProductNumeric_AB_ConstDiag_Anytype(Mat C)
610: {
611: Mat A = C->product->A, B = C->product->B;
612: Mat_ConstantDiagonal *a = (Mat_ConstantDiagonal *)A->data;
614: PetscFunctionBegin;
615: MatCheckProduct(C, 1);
616: PetscCall(MatCopy(B, C, SAME_NONZERO_PATTERN));
617: PetscCall(MatScale(C, a->diag));
618: PetscFunctionReturn(PETSC_SUCCESS);
619: }
621: static PetscErrorCode MatProductSymbolic_AB_ConstDiag_Anytype(Mat C)
622: {
623: Mat B = C->product->B;
624: Mat_Product *product = C->product;
625: Mat Cwork;
627: PetscFunctionBegin;
628: MatCheckProduct(C, 1);
629: PetscCheck(!C->product->data, PetscObjectComm((PetscObject)C), PETSC_ERR_PLIB, "Product data not empty");
630: PetscCall(MatDuplicate(B, MAT_DO_NOT_COPY_VALUES, &Cwork));
631: C->product = NULL;
632: PetscCall(MatHeaderReplace(C, &Cwork));
633: C->product = product;
634: C->ops->productnumeric = MatProductNumeric_AB_ConstDiag_Anytype;
635: PetscFunctionReturn(PETSC_SUCCESS);
636: }
638: /* AB for any non-diagonal A and MATCONSTANTDIAGONAL B: C = beta * A */
639: static PetscErrorCode MatProductNumeric_AB_Anytype_ConstDiag(Mat C)
640: {
641: Mat A = C->product->A, B = C->product->B;
642: Mat_ConstantDiagonal *b = (Mat_ConstantDiagonal *)B->data;
644: PetscFunctionBegin;
645: MatCheckProduct(C, 1);
646: PetscCall(MatCopy(A, C, SAME_NONZERO_PATTERN));
647: PetscCall(MatScale(C, b->diag));
648: PetscFunctionReturn(PETSC_SUCCESS);
649: }
651: static PetscErrorCode MatProductSymbolic_AB_Anytype_ConstDiag(Mat C)
652: {
653: Mat A = C->product->A;
654: Mat_Product *product = C->product;
655: Mat Cwork;
657: PetscFunctionBegin;
658: MatCheckProduct(C, 1);
659: PetscCheck(!C->product->data, PetscObjectComm((PetscObject)C), PETSC_ERR_PLIB, "Product data not empty");
660: PetscCall(MatDuplicate(A, MAT_DO_NOT_COPY_VALUES, &Cwork));
661: C->product = NULL;
662: PetscCall(MatHeaderReplace(C, &Cwork));
663: C->product = product;
664: C->ops->productnumeric = MatProductNumeric_AB_Anytype_ConstDiag;
665: PetscFunctionReturn(PETSC_SUCCESS);
666: }
668: /* AB for MATCONSTANTDIAGONAL * MATCONSTANTDIAGONAL: C = alpha * beta * I */
669: static PetscErrorCode MatProductNumeric_AB_ConstDiag_ConstDiag(Mat C)
670: {
671: Mat A = C->product->A, B = C->product->B;
672: Mat_ConstantDiagonal *a = (Mat_ConstantDiagonal *)A->data, *b = (Mat_ConstantDiagonal *)B->data, *c = (Mat_ConstantDiagonal *)C->data;
674: PetscFunctionBegin;
675: MatCheckProduct(C, 1);
676: c->diag = a->diag * b->diag;
677: PetscFunctionReturn(PETSC_SUCCESS);
678: }
680: static PetscErrorCode MatProductSymbolic_AB_ConstDiag_ConstDiag(Mat C)
681: {
682: Mat A = C->product->A, B = C->product->B;
684: PetscFunctionBegin;
685: MatCheckProduct(C, 1);
686: PetscCheck(!C->product->data, PetscObjectComm((PetscObject)C), PETSC_ERR_PLIB, "Product data not empty");
687: PetscCall(MatSetSizes(C, A->rmap->n, B->cmap->n, A->rmap->N, B->cmap->N));
688: PetscCall(MatSetType(C, MATCONSTANTDIAGONAL));
689: C->assembled = PETSC_TRUE;
690: C->ops->productnumeric = MatProductNumeric_AB_ConstDiag_ConstDiag;
691: PetscFunctionReturn(PETSC_SUCCESS);
692: }
694: /* AB for MATCONSTANTDIAGONAL A and MATDIAGONAL B: C_i = alpha * b_i */
695: static PetscErrorCode MatProductNumeric_AB_ConstDiag_Diagonal(Mat C)
696: {
697: Mat A = C->product->A, B = C->product->B;
698: Mat_ConstantDiagonal *a = (Mat_ConstantDiagonal *)A->data;
699: Vec bdiag, cdiag;
701: PetscFunctionBegin;
702: MatCheckProduct(C, 1);
703: PetscCall(MatDiagonalGetDiagonal(B, &bdiag));
704: PetscCall(MatDiagonalGetDiagonal(C, &cdiag));
705: PetscCall(VecCopy(bdiag, cdiag));
706: PetscCall(VecScale(cdiag, a->diag));
707: PetscCall(MatDiagonalRestoreDiagonal(C, &cdiag));
708: PetscCall(MatDiagonalRestoreDiagonal(B, &bdiag));
709: PetscFunctionReturn(PETSC_SUCCESS);
710: }
712: static PetscErrorCode MatProductSymbolic_AB_ConstDiag_Diagonal(Mat C)
713: {
714: Mat A = C->product->A, B = C->product->B;
715: Vec bdiag, cdiag;
717: PetscFunctionBegin;
718: MatCheckProduct(C, 1);
719: PetscCheck(!C->product->data, PetscObjectComm((PetscObject)C), PETSC_ERR_PLIB, "Product data not empty");
720: PetscCall(MatSetSizes(C, A->rmap->n, B->cmap->n, A->rmap->N, B->cmap->N));
721: PetscCall(MatSetType(C, MATDIAGONAL));
722: /* Duplicate B's diagonal Vec so C inherits the correct VecType (e.g., Kokkos, CUDA, HIP) */
723: PetscCall(MatDiagonalGetDiagonal(B, &bdiag));
724: PetscCall(VecDuplicate(bdiag, &cdiag));
725: PetscCall(MatDiagonalSetDiagonal(C, cdiag));
726: PetscCall(VecDestroy(&cdiag));
727: PetscCall(MatDiagonalRestoreDiagonal(B, &bdiag));
728: C->assembled = PETSC_TRUE;
729: C->ops->productnumeric = MatProductNumeric_AB_ConstDiag_Diagonal;
730: PetscFunctionReturn(PETSC_SUCCESS);
731: }
733: /* AB for MATDIAGONAL A and MATCONSTANTDIAGONAL B: C_i = beta * a_i */
734: static PetscErrorCode MatProductNumeric_AB_Diagonal_ConstDiag(Mat C)
735: {
736: Mat A = C->product->A, B = C->product->B;
737: Mat_ConstantDiagonal *b = (Mat_ConstantDiagonal *)B->data;
738: Vec adiag, cdiag;
740: PetscFunctionBegin;
741: MatCheckProduct(C, 1);
742: PetscCall(MatDiagonalGetDiagonal(A, &adiag));
743: PetscCall(MatDiagonalGetDiagonal(C, &cdiag));
744: PetscCall(VecCopy(adiag, cdiag));
745: PetscCall(VecScale(cdiag, b->diag));
746: PetscCall(MatDiagonalRestoreDiagonal(C, &cdiag));
747: PetscCall(MatDiagonalRestoreDiagonal(A, &adiag));
748: PetscFunctionReturn(PETSC_SUCCESS);
749: }
751: static PetscErrorCode MatProductSymbolic_AB_Diagonal_ConstDiag(Mat C)
752: {
753: Mat A = C->product->A, B = C->product->B;
754: Vec adiag, cdiag;
756: PetscFunctionBegin;
757: MatCheckProduct(C, 1);
758: PetscCheck(!C->product->data, PetscObjectComm((PetscObject)C), PETSC_ERR_PLIB, "Product data not empty");
759: PetscCall(MatSetSizes(C, A->rmap->n, B->cmap->n, A->rmap->N, B->cmap->N));
760: PetscCall(MatSetType(C, MATDIAGONAL));
761: /* Duplicate A's diagonal Vec so C inherits the correct VecType (e.g., Kokkos, CUDA, HIP) */
762: PetscCall(MatDiagonalGetDiagonal(A, &adiag));
763: PetscCall(VecDuplicate(adiag, &cdiag));
764: PetscCall(MatDiagonalSetDiagonal(C, cdiag));
765: PetscCall(VecDestroy(&cdiag));
766: PetscCall(MatDiagonalRestoreDiagonal(A, &adiag));
767: C->assembled = PETSC_TRUE;
768: C->ops->productnumeric = MatProductNumeric_AB_Diagonal_ConstDiag;
769: PetscFunctionReturn(PETSC_SUCCESS);
770: }
772: static PetscErrorCode MatProductSetFromOptions_ConstDiag_ConstDiag(Mat C)
773: {
774: Mat_Product *product = C->product;
776: PetscFunctionBegin;
777: if (product->type == MATPRODUCT_PtAP) C->ops->productsymbolic = MatProductSymbolic_PtAP_ConstDiag_ConstDiag;
778: else if (product->type == MATPRODUCT_AB) C->ops->productsymbolic = MatProductSymbolic_AB_ConstDiag_ConstDiag;
779: PetscFunctionReturn(PETSC_SUCCESS);
780: }
782: static PetscErrorCode MatProductSetFromOptions_ConstDiag_Diagonal(Mat C)
783: {
784: Mat_Product *product = C->product;
786: PetscFunctionBegin;
787: if (product->type == MATPRODUCT_PtAP) C->ops->productsymbolic = MatProductSymbolic_PtAP_ConstDiag_Diagonal;
788: else if (product->type == MATPRODUCT_AB) C->ops->productsymbolic = MatProductSymbolic_AB_ConstDiag_Diagonal;
789: PetscFunctionReturn(PETSC_SUCCESS);
790: }
792: static PetscErrorCode MatProductSetFromOptions_Diagonal_ConstDiag(Mat C)
793: {
794: Mat_Product *product = C->product;
796: PetscFunctionBegin;
797: if (product->type == MATPRODUCT_PtAP) C->ops->productsymbolic = MatProductSymbolic_PtAP_Diagonal_ConstDiag;
798: else if (product->type == MATPRODUCT_AB) C->ops->productsymbolic = MatProductSymbolic_AB_Diagonal_ConstDiag;
799: PetscFunctionReturn(PETSC_SUCCESS);
800: }
802: static PetscErrorCode MatProductSetFromOptions_ConstDiag_Dense_AB(Mat C)
803: {
804: PetscFunctionBegin;
805: C->ops->productsymbolic = MatProductSymbolic_ConstDiag_Dense;
806: PetscFunctionReturn(PETSC_SUCCESS);
807: }
809: static PetscErrorCode MatProductSetFromOptions_ConstDiag_Dense(Mat C)
810: {
811: Mat_Product *product = C->product;
813: PetscFunctionBegin;
814: if (product->type == MATPRODUCT_AB || product->type == MATPRODUCT_AtB) PetscCall(MatProductSetFromOptions_ConstDiag_Dense_AB(C));
815: else if (product->type == MATPRODUCT_PtAP) C->ops->productsymbolic = MatProductSymbolic_PtAP_ConstDiag_Anytype;
816: PetscFunctionReturn(PETSC_SUCCESS);
817: }
819: static PetscErrorCode MatProductSetFromOptions_ConstDiag_Anytype(Mat C)
820: {
821: Mat_Product *product = C->product;
822: PetscBool Acdiag, Bcdiag;
824: PetscFunctionBegin;
825: PetscCall(PetscObjectTypeCompare((PetscObject)product->A, MATCONSTANTDIAGONAL, &Acdiag));
826: PetscCall(PetscObjectTypeCompare((PetscObject)product->B, MATCONSTANTDIAGONAL, &Bcdiag));
827: if (Acdiag && !Bcdiag && (product->type == MATPRODUCT_PtAP)) C->ops->productsymbolic = MatProductSymbolic_PtAP_ConstDiag_Anytype;
828: else if (Bcdiag && !Acdiag && (product->type == MATPRODUCT_PtAP)) C->ops->productsymbolic = MatProductSymbolic_PtAP_Anytype_ConstDiag;
829: else if (Acdiag && !Bcdiag && (product->type == MATPRODUCT_AB)) C->ops->productsymbolic = MatProductSymbolic_AB_ConstDiag_Anytype;
830: else if (Bcdiag && !Acdiag && (product->type == MATPRODUCT_AB)) C->ops->productsymbolic = MatProductSymbolic_AB_Anytype_ConstDiag;
831: PetscFunctionReturn(PETSC_SUCCESS);
832: }
834: /*MC
835: MATCONSTANTDIAGONAL - "constant-diagonal" - A diagonal matrix type with a uniform value
836: along the diagonal.
838: Level: advanced
840: .seealso: [](ch_matrices), `Mat`, `MatCreateConstantDiagonal()`
841: M*/
842: PETSC_EXTERN PetscErrorCode MatCreate_ConstantDiagonal(Mat A)
843: {
844: Mat_ConstantDiagonal *ctx;
846: PetscFunctionBegin;
847: PetscCall(PetscNew(&ctx));
848: ctx->diag = 0.0;
849: A->data = (void *)ctx;
851: A->assembled = PETSC_TRUE;
852: A->preallocated = PETSC_TRUE;
853: A->structurally_symmetric = PETSC_BOOL3_TRUE;
854: A->structural_symmetry_eternal = PETSC_TRUE;
855: A->symmetric = PETSC_BOOL3_TRUE;
856: if (!PetscDefined(USE_COMPLEX)) A->hermitian = PETSC_BOOL3_TRUE;
857: A->symmetry_eternal = PETSC_TRUE;
859: A->ops->mult = MatMult_ConstantDiagonal;
860: A->ops->multadd = MatMultAdd_ConstantDiagonal;
861: A->ops->multtranspose = MatMult_ConstantDiagonal;
862: A->ops->multtransposeadd = MatMultAdd_ConstantDiagonal;
863: A->ops->multhermitiantranspose = MatMultHermitianTranspose_ConstantDiagonal;
864: A->ops->multhermitiantransposeadd = MatMultHermitianTransposeAdd_ConstantDiagonal;
865: A->ops->solve = MatSolve_ConstantDiagonal;
866: A->ops->solvetranspose = MatSolve_ConstantDiagonal;
867: A->ops->norm = MatNorm_ConstantDiagonal;
868: A->ops->createsubmatrices = MatCreateSubMatrices_ConstantDiagonal;
869: A->ops->duplicate = MatDuplicate_ConstantDiagonal;
870: A->ops->getrow = MatGetRow_ConstantDiagonal;
871: A->ops->restorerow = MatRestoreRow_ConstantDiagonal;
872: A->ops->sor = MatSOR_ConstantDiagonal;
873: A->ops->shift = MatShift_ConstantDiagonal;
874: A->ops->scale = MatScale_ConstantDiagonal;
875: A->ops->getdiagonal = MatGetDiagonal_ConstantDiagonal;
876: A->ops->view = MatView_ConstantDiagonal;
877: A->ops->zeroentries = MatZeroEntries_ConstantDiagonal;
878: A->ops->destroy = MatDestroy_ConstantDiagonal;
879: A->ops->getinfo = MatGetInfo_ConstantDiagonal;
880: A->ops->equal = MatEqual_ConstantDiagonal;
881: A->ops->axpy = MatAXPY_ConstantDiagonal;
882: A->ops->setrandom = MatSetRandom_ConstantDiagonal;
883: A->ops->conjugate = MatConjugate_ConstantDiagonal;
884: A->ops->transpose = MatTranspose_ConstantDiagonal;
886: PetscCall(PetscObjectChangeTypeName((PetscObject)A, MATCONSTANTDIAGONAL));
887: PetscCall(PetscObjectComposeFunction((PetscObject)A, "MatConstantDiagonalGetConstant_C", MatConstantDiagonalGetConstant_ConstantDiagonal));
888: PetscCall(PetscObjectComposeFunction((PetscObject)A, "MatProductSetFromOptions_constantdiagonal_constantdiagonal_C", MatProductSetFromOptions_ConstDiag_ConstDiag));
889: PetscCall(PetscObjectComposeFunction((PetscObject)A, "MatProductSetFromOptions_constantdiagonal_diagonal_C", MatProductSetFromOptions_ConstDiag_Diagonal));
890: PetscCall(PetscObjectComposeFunction((PetscObject)A, "MatProductSetFromOptions_diagonal_constantdiagonal_C", MatProductSetFromOptions_Diagonal_ConstDiag));
891: PetscCall(PetscObjectComposeFunction((PetscObject)A, "MatProductSetFromOptions_constantdiagonal_seqdense_C", MatProductSetFromOptions_ConstDiag_Dense));
892: PetscCall(PetscObjectComposeFunction((PetscObject)A, "MatProductSetFromOptions_constantdiagonal_mpidense_C", MatProductSetFromOptions_ConstDiag_Dense));
893: #if PetscDefined(HAVE_CUDA)
894: PetscCall(PetscObjectComposeFunction((PetscObject)A, "MatProductSetFromOptions_constantdiagonal_seqdensecuda_C", MatProductSetFromOptions_ConstDiag_Dense));
895: PetscCall(PetscObjectComposeFunction((PetscObject)A, "MatProductSetFromOptions_constantdiagonal_mpidensecuda_C", MatProductSetFromOptions_ConstDiag_Dense));
896: #endif
897: #if PetscDefined(HAVE_HIP)
898: PetscCall(PetscObjectComposeFunction((PetscObject)A, "MatProductSetFromOptions_constantdiagonal_seqdensehip_C", MatProductSetFromOptions_ConstDiag_Dense));
899: PetscCall(PetscObjectComposeFunction((PetscObject)A, "MatProductSetFromOptions_constantdiagonal_mpidensehip_C", MatProductSetFromOptions_ConstDiag_Dense));
900: #endif
901: PetscCall(PetscObjectComposeFunction((PetscObject)A, "MatProductSetFromOptions_anytype_C", MatProductSetFromOptions_ConstDiag_Anytype));
902: PetscFunctionReturn(PETSC_SUCCESS);
903: }
905: static PetscErrorCode MatFactorNumeric_ConstantDiagonal(Mat fact, Mat A, const MatFactorInfo *info)
906: {
907: Mat_ConstantDiagonal *actx = (Mat_ConstantDiagonal *)A->data, *fctx = (Mat_ConstantDiagonal *)fact->data;
909: PetscFunctionBegin;
910: if (actx->diag == 0.0) fact->factorerrortype = MAT_FACTOR_NUMERIC_ZEROPIVOT;
911: else fact->factorerrortype = MAT_FACTOR_NOERROR;
912: fctx->diag = 1.0 / actx->diag;
913: fact->ops->solve = MatMult_ConstantDiagonal;
914: PetscFunctionReturn(PETSC_SUCCESS);
915: }
917: static PetscErrorCode MatFactorSymbolic_LU_ConstantDiagonal(Mat fact, Mat A, IS isrow, IS iscol, const MatFactorInfo *info)
918: {
919: PetscFunctionBegin;
920: fact->ops->lufactornumeric = MatFactorNumeric_ConstantDiagonal;
921: PetscFunctionReturn(PETSC_SUCCESS);
922: }
924: static PetscErrorCode MatFactorSymbolic_Cholesky_ConstantDiagonal(Mat fact, Mat A, IS isrow, const MatFactorInfo *info)
925: {
926: PetscFunctionBegin;
927: fact->ops->choleskyfactornumeric = MatFactorNumeric_ConstantDiagonal;
928: PetscFunctionReturn(PETSC_SUCCESS);
929: }
931: PETSC_INTERN PetscErrorCode MatGetFactor_constantdiagonal_petsc(Mat A, MatFactorType ftype, Mat *B)
932: {
933: PetscInt n = A->rmap->n, N = A->rmap->N;
935: PetscFunctionBegin;
936: PetscCall(MatCreateConstantDiagonal(PetscObjectComm((PetscObject)A), n, n, N, N, 0, B));
938: (*B)->factortype = ftype;
939: (*B)->ops->ilufactorsymbolic = MatFactorSymbolic_LU_ConstantDiagonal;
940: (*B)->ops->lufactorsymbolic = MatFactorSymbolic_LU_ConstantDiagonal;
941: (*B)->ops->iccfactorsymbolic = MatFactorSymbolic_Cholesky_ConstantDiagonal;
942: (*B)->ops->choleskyfactorsymbolic = MatFactorSymbolic_Cholesky_ConstantDiagonal;
944: (*B)->ops->shift = NULL;
945: (*B)->ops->scale = NULL;
946: (*B)->ops->mult = NULL;
947: (*B)->ops->sor = NULL;
948: (*B)->ops->zeroentries = NULL;
950: PetscCall(PetscFree((*B)->solvertype));
951: PetscCall(PetscStrallocpy(MATSOLVERPETSC, &(*B)->solvertype));
952: PetscFunctionReturn(PETSC_SUCCESS);
953: }