1
2 #include <../src/mat/impls/baij/mpi/mpibaij.h> /*I "petscmat.h" I*/
3 #include <../src/mat/impls/aij/mpi/mpiaij.h>
4 #include <petsc/private/matimpl.h>
5 #include <petscmat.h>
6
MatConvert_MPIAIJ_MPIBAIJ(Mat A,MatType newtype,MatReuse reuse,Mat * newmat)7 PETSC_INTERN PetscErrorCode MatConvert_MPIAIJ_MPIBAIJ(Mat A, MatType newtype,MatReuse reuse,Mat *newmat)
8 {
9 PetscErrorCode ierr;
10 Mat M;
11 Mat_MPIAIJ *mpimat = (Mat_MPIAIJ*)A->data;
12 Mat_SeqAIJ *Aa = (Mat_SeqAIJ*)mpimat->A->data,*Ba = (Mat_SeqAIJ*)mpimat->B->data;
13 PetscInt *d_nnz,*o_nnz;
14 PetscInt i,m,n,lm,ln,bs=PetscAbs(A->rmap->bs);
15
16 PetscFunctionBegin;
17 if (reuse != MAT_REUSE_MATRIX) {
18 ierr = MatGetSize(A,&m,&n);CHKERRQ(ierr);
19 ierr = MatGetLocalSize(A,&lm,&ln);CHKERRQ(ierr);
20 ierr = PetscMalloc2(lm/bs,&d_nnz,lm/bs,&o_nnz);CHKERRQ(ierr);
21
22 for (i=0; i<lm/bs; i++) {
23 d_nnz[i] = (Aa->i[i*bs+1] - Aa->i[i*bs])/bs;
24 o_nnz[i] = (Ba->i[i*bs+1] - Ba->i[i*bs])/bs;
25 }
26
27 ierr = MatCreate(PetscObjectComm((PetscObject)A),&M);CHKERRQ(ierr);
28 ierr = MatSetSizes(M,lm,ln,m,n);CHKERRQ(ierr);
29 ierr = MatSetType(M,MATMPIBAIJ);CHKERRQ(ierr);
30 ierr = MatSeqBAIJSetPreallocation(M,bs,0,d_nnz);CHKERRQ(ierr);
31 ierr = MatMPIBAIJSetPreallocation(M,bs,0,d_nnz,0,o_nnz);CHKERRQ(ierr);
32 ierr = PetscFree2(d_nnz,o_nnz);CHKERRQ(ierr);
33 } else M = *newmat;
34
35 /* reuse may not be equal to MAT_REUSE_MATRIX, but the basic converter will reallocate or replace newmat if this value is not used */
36 /* if reuse is equal to MAT_INITIAL_MATRIX, it has been appropriately preallocated before */
37 /* MAT_INPLACE_MATRIX, it will be replaced with MatHeaderReplace below */
38 ierr = MatConvert_Basic(A,newtype,MAT_REUSE_MATRIX,&M);CHKERRQ(ierr);
39
40 if (reuse == MAT_INPLACE_MATRIX) {
41 ierr = MatHeaderReplace(A,&M);CHKERRQ(ierr);
42 } else *newmat = M;
43 PetscFunctionReturn(0);
44 }
45