Actual source code: svdmat.c
1: /*
2: SVD routines for accessing the problem matrix.
4: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
5: SLEPc - Scalable Library for Eigenvalue Problem Computations
6: Copyright (c) 2002-2011, Universitat Politecnica de Valencia, Spain
8: This file is part of SLEPc.
9:
10: SLEPc is free software: you can redistribute it and/or modify it under the
11: terms of version 3 of the GNU Lesser General Public License as published by
12: the Free Software Foundation.
14: SLEPc is distributed in the hope that it will be useful, but WITHOUT ANY
15: WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
16: FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
17: more details.
19: You should have received a copy of the GNU Lesser General Public License
20: along with SLEPc. If not, see <http://www.gnu.org/licenses/>.
21: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
22: */
24: #include <private/svdimpl.h> /*I "slepcsvd.h" I*/
28: PetscErrorCode SVDMatMult(SVD svd,PetscBool trans,Vec x,Vec y)
29: {
33: svd->matvecs++;
34: if (trans) {
35: if (svd->AT) {
36: MatMult(svd->AT,x,y);
37: } else {
38: MatMultTranspose(svd->A,x,y);
39: }
40: } else {
41: if (svd->A) {
42: MatMult(svd->A,x,y);
43: } else {
44: MatMultTranspose(svd->AT,x,y);
45: }
46: }
47: return(0);
48: }
52: PetscErrorCode SVDMatGetVecs(SVD svd,Vec *x,Vec *y)
53: {
57: if (svd->A) {
58: MatGetVecs(svd->A,x,y);
59: } else {
60: MatGetVecs(svd->AT,y,x);
61: }
62: return(0);
63: }
67: PetscErrorCode SVDMatGetSize(SVD svd,PetscInt *m,PetscInt *n)
68: {
72: if (svd->A) {
73: MatGetSize(svd->A,m,n);
74: } else {
75: MatGetSize(svd->AT,n,m);
76: }
77: return(0);
78: }
82: PetscErrorCode SVDMatGetLocalSize(SVD svd,PetscInt *m,PetscInt *n)
83: {
87: if (svd->A) {
88: MatGetLocalSize(svd->A,m,n);
89: } else {
90: MatGetLocalSize(svd->AT,n,m);
91: }
92: return(0);
93: }