/[escript]/trunk/paso/src/SystemMatrix_MatrixVector.c
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Contents of /trunk/paso/src/SystemMatrix_MatrixVector.c

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Revision 1388 - (show annotations)
Fri Jan 11 07:45:58 2008 UTC (11 years, 8 months ago) by trankine
File MIME type: text/plain
File size: 3446 byte(s)
And get the *(&(*&(* name right
1
2 /* $Id$ */
3
4 /*******************************************************
5 *
6 * Copyright 2003-2007 by ACceSS MNRF
7 * Copyright 2007 by University of Queensland
8 *
9 * http://esscc.uq.edu.au
10 * Primary Business: Queensland, Australia
11 * Licensed under the Open Software License version 3.0
12 * http://www.opensource.org/licenses/osl-3.0.php
13 *
14 *******************************************************/
15
16 /**************************************************************/
17
18 /* Paso: matrix vector product with sparse matrix */
19
20 /**************************************************************/
21
22 /* Copyrights by ACcESS Australia 2003,2004,2005 */
23 /* Author: gross@access.edu.au */
24
25 /**************************************************************/
26
27 #include "Paso.h"
28 #include "SystemMatrix.h"
29
30 /**************************************************************************/
31
32 /* raw scaled vector update operation: out = alpha * A * in + beta * out */
33
34 /* has to be called within a parallel region */
35 /* barrier synconization is performed to make sure that the input vector available */
36
37 void Paso_SystemMatrix_MatrixVector(double alpha,
38 Paso_SystemMatrix* A,
39 double* in,
40 double beta,
41 double* out) {
42
43 double *snd_buffer=NULL, *rcv_buffer=NULL;
44 dim_t N;
45 Paso_MPIInfo *mpi_info=A->mpi_info;
46
47 if (A->type & MATRIX_FORMAT_CSC) {
48 if ( mpi_info->size>1) {
49 Paso_setError(SYSTEM_ERROR,"Paso_SystemMatrix_MatrixVector: CSC is not supported by MPI.");
50 return;
51 } else {
52 if (A->type & MATRIX_FORMAT_OFFSET1) {
53 Paso_SparseMatrix_MatrixVector_CSC_OFFSET1(alpha,A->mainBlock,in,beta,out);
54 } else {
55 Paso_SparseMatrix_MatrixVector_CSC_OFFSET0(alpha,A->mainBlock,in,beta,out);
56 }
57 }
58 } else if (A->type & MATRIX_FORMAT_TRILINOS_CRS) {
59 Paso_setError(SYSTEM_ERROR,"Paso_SystemMatrix_MatrixVector: TRILINOS is not supported with MPI.");
60 return;
61 } else {
62 if (A->type & MATRIX_FORMAT_OFFSET1) {
63 if ( mpi_info->size>1) {
64 Paso_setError(SYSTEM_ERROR,"Paso_SystemMatrix_MatrixVector: CSR with index 1 is not supported by MPI.");
65 return;
66 } else {
67 Paso_SparseMatrix_MatrixVector_CSR_OFFSET1(alpha,A->mainBlock,in,beta,out);
68 }
69 } else {
70 Paso_SystemMatrix_allocBuffer(A);
71 if (Paso_noError()) {
72 Paso_SystemMatrix_MatrixVector_CSR_OFFSET0(alpha,A,in,beta,out);
73 }
74 Paso_SystemMatrix_freeBuffer(A);
75 }
76 }
77 }
78
79 void Paso_SystemMatrix_MatrixVector_CSR_OFFSET0(double alpha,
80 Paso_SystemMatrix* A,
81 double* in,
82 double beta,
83 double* out)
84 {
85 double *remote_values=NULL;
86 /* start exchange */
87 Paso_SystemMatrix_startCollect(A,in);
88 /* process main block */
89 Paso_SparseMatrix_MatrixVector_CSR_OFFSET0(alpha,A->mainBlock,in,beta,out);
90 /* finish exchange */
91 remote_values=Paso_SystemMatrix_finishCollect(A);
92 /* process couple block */
93 Paso_SparseMatrix_MatrixVector_CSR_OFFSET0(alpha,A->coupleBlock,remote_values,1.,out);
94 }

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