/[escript]/trunk/paso/src/SparseMatrix_getSubmatrix.cpp
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Annotation of /trunk/paso/src/SparseMatrix_getSubmatrix.cpp

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Revision 3911 - (hide annotations)
Thu Jun 14 01:01:03 2012 UTC (7 years, 4 months ago) by jfenwick
Original Path: trunk/paso/src/SparseMatrix_getSubmatrix.c
File MIME type: text/plain
File size: 6101 byte(s)
Copyright changes
1 ksteube 1315
2     /*******************************************************
3 ksteube 1811 *
4 jfenwick 3911 * Copyright (c) 2003-2012 by University of Queensland
5 ksteube 1811 * 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 ksteube 1315
14 ksteube 1811
15 ksteube 1315 /**************************************************************/
16    
17     /* Paso: SparseMatrix */
18    
19     /**************************************************************/
20    
21     /* Copyrights by ACcESS Australia 2003, 2004,2005 */
22 jfenwick 2608 /* Author: Lutz Gross, l.gross@uq.edu.au */
23 ksteube 1315
24     /**************************************************************/
25    
26     #include "Paso.h"
27     #include "SparseMatrix.h"
28     #include "PasoUtil.h"
29    
30     /**************************************************************
31    
32 caltinay 3642 Returns the submatrix of A where rows are gathered by index row_list
33 ksteube 1315 and columns are selected by non-negative values of new_col_index.
34 caltinay 3642 If new_col_index[i]>-1 new_col_index[i] gives the column of i in
35     the returned submatrix.
36 ksteube 1315 */
37    
38    
39     Paso_SparseMatrix* Paso_SparseMatrix_getSubmatrix(Paso_SparseMatrix* A,int n_row_sub,int n_col_sub, index_t* row_list,index_t* new_col_index){
40     Paso_Pattern* sub_pattern=NULL;
41     Paso_SparseMatrix* out=NULL;
42     index_t index_offset=(A->type & MATRIX_FORMAT_OFFSET1 ? 1:0);
43     int i,k,tmp,m,subpattern_row;
44     int type=A->type;
45 jfenwick 3259 Esys_resetError();
46 ksteube 1315 if (A->type & MATRIX_FORMAT_CSC) {
47 caltinay 3642 Esys_setError(TYPE_ERROR, "Paso_SparseMatrix_getSubmatrix: gathering submatrices supports CSR matrix format only.");
48 ksteube 1315 } else {
49     sub_pattern=Paso_Pattern_getSubpattern(A->pattern,n_row_sub,n_col_sub,row_list,new_col_index);
50 jfenwick 3259 if (Esys_noError()) {
51 ksteube 1315 /* create the return object */
52 gross 2551 out=Paso_SparseMatrix_alloc(type,sub_pattern,A->row_block_size,A->col_block_size,TRUE);
53 jfenwick 3259 if (Esys_noError()) {
54 ksteube 1315 #pragma omp parallel for private(i,k,m,subpattern_row,tmp) schedule(static)
55     for (i=0;i<n_row_sub;++i) {
56     subpattern_row=row_list[i];
57     for (k=A->pattern->ptr[subpattern_row]-index_offset;k<A->pattern->ptr[subpattern_row+1]-index_offset;++k) {
58     tmp=new_col_index[A->pattern->index[k]-index_offset];
59     if (tmp>-1) {
60     #pragma ivdep
61     for (m=out->pattern->ptr[i]-index_offset;m<out->pattern->ptr[i+1]-index_offset;++m) {
62     if (out->pattern->index[m]==tmp+index_offset) {
63 gross 1639 Paso_copyShortDouble(A->block_size,&(A->val[k*A->block_size]),&(out->val[m*A->block_size]));
64 ksteube 1315 break;
65     }
66     }
67     }
68     }
69     }
70     }
71     }
72     Paso_Pattern_free(sub_pattern);
73     }
74     return out;
75     }
76 artak 2659
77     Paso_SparseMatrix* Paso_SparseMatrix_getBlock(Paso_SparseMatrix* A, int blockid){
78    
79     dim_t blocksize=A->row_block_size,i;
80     dim_t n=A->numRows;
81     index_t iptr;
82    
83     Paso_SparseMatrix* out=NULL;
84    
85     out=Paso_SparseMatrix_alloc(A->type,A->pattern, 1, 1, 0);
86    
87     if (blocksize==1) {
88     if (blockid==1) {
89 artak 2666 #pragma omp parallel for private(i,iptr) schedule(static)
90 artak 2659 for(i=0;i<n;++i) {
91     for (iptr=A->pattern->ptr[i];iptr<A->pattern->ptr[i+1]; ++iptr) {
92     out->val[iptr]=A->val[iptr];
93     }
94     }
95     }
96     else {
97 caltinay 3642 Esys_setError(VALUE_ERROR, "Paso_SparseMatrix_getBlock: Requested and actual block sizes do not match.");
98 artak 2659 }
99     }
100     else if (blocksize==2) {
101     if (blockid==1) {
102 artak 2666 #pragma omp parallel for private(i,iptr) schedule(static)
103 artak 2659 for(i=0;i<n;i++) {
104     for (iptr=A->pattern->ptr[i];iptr<A->pattern->ptr[i+1]; ++iptr) {
105     out->val[iptr]=A->val[4*iptr];
106     }
107     }
108     }
109     else if (blockid==2) {
110 artak 2666 #pragma omp parallel for private(i,iptr) schedule(static)
111 artak 2659 for(i=0;i<n;i++) {
112     for (iptr=A->pattern->ptr[i];iptr<A->pattern->ptr[i+1]; ++iptr) {
113     out->val[iptr]=A->val[4*iptr+3];
114     }
115     }
116     }
117     else {
118 caltinay 3642 Esys_setError(VALUE_ERROR,"Paso_SparseMatrix_getBlock: Requested and actual block sizes do not match.");
119 artak 2659 }
120     }
121     else if (blocksize==3) {
122     if (blockid==1) {
123 artak 2666 #pragma omp parallel for private(i,iptr) schedule(static)
124 artak 2659 for(i=0;i<n;i++) {
125     for (iptr=A->pattern->ptr[i];iptr<A->pattern->ptr[i+1]; ++iptr) {
126     out->val[iptr]=A->val[9*iptr];
127     }
128     }
129     }
130     else if (blockid==2) {
131 artak 2666 #pragma omp parallel for private(i,iptr) schedule(static)
132 artak 2659 for(i=0;i<n;i++) {
133     for (iptr=A->pattern->ptr[i];iptr<A->pattern->ptr[i+1]; ++iptr) {
134     out->val[iptr]=A->val[9*iptr+4];
135     }
136     }
137     }
138     else if (blockid==3) {
139 artak 2666 #pragma omp parallel for private(i,iptr) schedule(static)
140 artak 2659 for(i=0;i<n;i++) {
141     for (iptr=A->pattern->ptr[i];iptr<A->pattern->ptr[i+1]; ++iptr) {
142     out->val[iptr]=A->val[9*iptr+8];
143     }
144     }
145     }
146     else {
147 caltinay 3642 Esys_setError(VALUE_ERROR,"Paso_SparseMatrix_getBlock: Requested and actual block sizes do not match.");
148 artak 2659 }
149     }
150    
151 caltinay 3642 return out;
152 artak 2659 }

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