/[escript]/branches/doubleplusgood/paso/src/SparseMatrix_invMain.cpp
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Contents of /branches/doubleplusgood/paso/src/SparseMatrix_invMain.cpp

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Revision 3402 - (show annotations)
Tue Dec 7 07:36:12 2010 UTC (8 years, 3 months ago) by gross
Original Path: trunk/paso/src/SparseMatrix_invMain.c
File MIME type: text/plain
File size: 3082 byte(s)
AMG support now block size > 3 (requires clapack or MKL).

additional diagnostics for AMG 


1
2 /*******************************************************
3 *
4 * Copyright (c) 2003-2010 by University of Queensland
5 * Earth Systems Science Computational Center (ESSCC)
6 * http://www.uq.edu.au/esscc
7 *
8 * Primary Business: Queensland, Australia
9 * Licensed under the Open Software License version 3.0
10 * http://www.opensource.org/licenses/osl-3.0.php
11 *
12 *******************************************************/
13
14
15 /**************************************************************/
16
17 /* Paso: inverts the main diagonal of a SparseMatrix: */
18
19 /**************************************************************/
20
21 /* Copyrights by ACcESS Australia 2010 */
22 /* Author: Lutz Gross, l.gross@uq.edu.au */
23
24 /**************************************************************/
25
26 #include "Paso.h"
27 #include "SparseMatrix.h"
28 #include "Solver.h"
29 #include "BlockOps.h"
30 #include "PasoUtil.h"
31
32 void Paso_SparseMatrix_invMain(Paso_SparseMatrix * A_p, double* inv_diag, int* pivot) {
33 index_t failed=0;
34 register double A11;
35 const dim_t n=A_p->numRows;
36 const dim_t n_block=A_p->row_block_size;
37 const dim_t m_block=A_p->col_block_size;
38 const dim_t block_size=A_p->block_size;
39 dim_t i;
40 register index_t iPtr;
41 index_t* main_ptr=Paso_Pattern_borrowMainDiagonalPointer(A_p->pattern);
42 /* check matrix is square */
43 if (m_block != n_block) {
44 Esys_setError(TYPE_ERROR, "Paso_SparseMatrix_invMain: square block size expected.");
45 }
46 if (Esys_noError()) {
47
48 if (n_block==1) {
49 #pragma omp parallel for private(i, iPtr, A11) schedule(static)
50 for (i = 0; i < n; i++) {
51 iPtr= main_ptr[i];
52 A11=A_p->val[iPtr];
53 if ( ABS(A11) > 0.) {
54 inv_diag[i]=1./A11;
55 } else {
56 failed=1;
57 }
58 }
59 } else if (n_block==2) {
60 #pragma omp parallel for private(i, iPtr) schedule(static)
61 for (i = 0; i < n; i++) {
62 iPtr= main_ptr[i];
63 Paso_BlockOps_invM_2(&inv_diag[i*4], &A_p->val[iPtr*4], &failed);
64 }
65 } else if (n_block==3) {
66 #pragma omp parallel for private(i, iPtr) schedule(static)
67 for (i = 0; i < n; i++) {
68 iPtr= main_ptr[i];
69 Paso_BlockOps_invM_3(&inv_diag[i*9], &A_p->val[iPtr*9], &failed);
70 }
71 } else {
72 #pragma omp parallel for private(i, iPtr) schedule(static)
73 for (i = 0; i < n; i++) {
74 iPtr= main_ptr[i];
75 Paso_BlockOps_Cpy_N(block_size, &inv_diag[i*block_size], &A_p->val[iPtr*block_size]);
76 Paso_BlockOps_invM_N(n_block, &inv_diag[i*block_size], &pivot[i*n_block], &failed);
77 }
78 }
79 }
80 if (failed > 0) {
81 Esys_setError(ZERO_DIVISION_ERROR, "Paso_SparseMatrix_invMain: non-regular main diagonal block.");
82 }
83 }
84 void Paso_SparseMatrix_applyBlockMatrix(Paso_SparseMatrix * A_p, double* block_diag, int* pivot, double*x, double *b) {
85
86 /* inv_diag=MEMALLOC( A->numRows * A_p-> block_size,double);
87 pivot=MEMALLOC( A->numRows * A->row_block_size */
88 dim_t n=A_p->numRows;
89 dim_t n_block=A_p->row_block_size;
90 Paso_Copy(n_block*n, x,b);
91 Paso_BlockOps_solveAll(n_block,n,block_diag,pivot,x);
92 }
93

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