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/* $Id$ */ |
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/**************************************************************/ |
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/* Paso: SystemMatrixPatternPattern */ |
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/**************************************************************/ |
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/* Copyrights by ACcESS Australia 2003, 2004, 2005 */ |
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/* Author: gross@access.edu.au */ |
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/**************************************************************/ |
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#include "Paso.h" |
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#include "PasoUtil.h" |
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#include "SystemMatrixPattern.h" |
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/**************************************************************/ |
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/* creates SystemMatrixPattern */ |
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Paso_SystemMatrixPattern* Paso_SystemMatrixPattern_getSubpattern(Paso_SystemMatrixPattern* pattern, \ |
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int new_n_rows, index_t* row_list,index_t* new_col_index) { |
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index_t index_offset=(pattern->type & PATTERN_FORMAT_OFFSET1 ? 1:0); |
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Paso_SystemMatrixPattern*out=NULL; |
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index_t *ptr=NULL,*index=NULL,k,j,subpattern_row,tmp; |
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dim_t i; |
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Paso_resetError(); |
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|
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ptr=MEMALLOC(new_n_rows+1,index_t); |
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if (! Paso_checkPtr(ptr)) { |
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#pragma omp parallel |
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{ |
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#pragma omp for private(i) schedule(static) |
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for (i=0;i<new_n_rows+1;++i) ptr[i]=0; |
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|
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/* find the number column entries in each row */ |
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#pragma omp for private(i,k,j,subpattern_row) schedule(static) |
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for (i=0;i<new_n_rows;++i) { |
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j=0; |
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subpattern_row=row_list[i]; |
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for (k=pattern->ptr[subpattern_row]-index_offset;k<pattern->ptr[subpattern_row+1]-index_offset;++k) |
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if (new_col_index[pattern->index[k]-index_offset]>-1) j++; |
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ptr[i]=j; |
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} |
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} |
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/* accummulate ptr */ |
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ptr[new_n_rows]=Paso_Util_cumsum(new_n_rows,ptr); |
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index=MEMALLOC(ptr[new_n_rows],index_t); |
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if (Paso_checkPtr(index)) { |
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MEMFREE(ptr); |
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} else { |
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/* find the number column entries in each row */ |
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#pragma omp parallel for private(i,k,j,subpattern_row,tmp) schedule(static) |
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for (i=0;i<new_n_rows;++i) { |
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j=ptr[i]; |
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subpattern_row=row_list[i]; |
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for (k=pattern->ptr[subpattern_row]-index_offset;k<pattern->ptr[subpattern_row+1]-index_offset;++k) { |
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tmp=new_col_index[pattern->index[k]-index_offset]; |
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if (tmp>-1) { |
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index[j]=tmp; |
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++j; |
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} |
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} |
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} |
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/* create return value */ |
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out=Paso_SystemMatrixPattern_alloc(pattern->type,new_n_rows,ptr,index); |
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if (! Paso_noError()) { |
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MEMFREE(index); |
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MEMFREE(ptr); |
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} |
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} |
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} |
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return out; |
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} |
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/* |
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* $Log$ |
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* Revision 1.2 2005/09/15 03:44:39 jgs |
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* Merge of development branch dev-02 back to main trunk on 2005-09-15 |
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* |
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* Revision 1.1.2.1 2005/09/05 06:29:47 gross |
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* These files have been extracted from finley to define a stand alone libray for iterative |
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* linear solvers on the ALTIX. main entry through Paso_solve. this version compiles but |
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* has not been tested yet. |
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* |
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* |
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*/ |
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