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) 2002-2013, Universitat Politecnica de Valencia, Spain
8: This file is part of SLEPc.
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 <slepc-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: #if defined(PETSC_USE_COMPLEX)
39: MatMultHermitianTranspose(svd->A,x,y);
40: #else
41: MatMultTranspose(svd->A,x,y);
42: #endif
43: }
44: } else {
45: if (svd->A) {
46: MatMult(svd->A,x,y);
47: } else {
48: #if defined(PETSC_USE_COMPLEX)
49: MatMultHermitianTranspose(svd->AT,x,y);
50: #else
51: MatMultTranspose(svd->AT,x,y);
52: #endif
53: }
54: }
55: return(0);
56: }
60: PetscErrorCode SVDMatGetVecs(SVD svd,Vec *x,Vec *y)
61: {
65: if (svd->A) {
66: MatGetVecs(svd->A,x,y);
67: } else {
68: MatGetVecs(svd->AT,y,x);
69: }
70: return(0);
71: }
75: PetscErrorCode SVDMatGetSize(SVD svd,PetscInt *m,PetscInt *n)
76: {
80: if (svd->A) {
81: MatGetSize(svd->A,m,n);
82: } else {
83: MatGetSize(svd->AT,n,m);
84: }
85: return(0);
86: }
90: PetscErrorCode SVDMatGetLocalSize(SVD svd,PetscInt *m,PetscInt *n)
91: {
95: if (svd->A) {
96: MatGetLocalSize(svd->A,m,n);
97: } else {
98: MatGetLocalSize(svd->AT,n,m);
99: }
100: return(0);
101: }