1 #define PETSCMAT_DLL 2 3 #include "mpisbaij.h" /*I "petscmat.h" I*/ 4 #include "../src/mat/impls/aij/mpi/mpiaij.h" 5 #include "private/matimpl.h" 6 #include "petscmat.h" 7 8 EXTERN_C_BEGIN 9 #undef __FUNCT__ 10 #define __FUNCT__ "MatConvert_MPIAIJ_MPISBAIJ" 11 PetscErrorCode PETSCMAT_DLLEXPORT MatConvert_MPIAIJ_MPISBAIJ(Mat A, MatType newtype,MatReuse reuse,Mat *newmat) 12 { 13 PetscErrorCode ierr; 14 Mat M; 15 Mat_MPIAIJ *mpimat = (Mat_MPIAIJ*)A->data; 16 Mat_SeqAIJ *Aa = (Mat_SeqAIJ*)mpimat->A->data,*Ba = (Mat_SeqAIJ*)mpimat->B->data; 17 PetscInt *d_nnz,*o_nnz; 18 PetscInt i,j,k,nz; 19 PetscInt m,n,lm,ln; 20 PetscInt rstart,rend; 21 const PetscScalar *vwork; 22 const PetscInt *cwork; 23 24 PetscFunctionBegin; 25 ierr = MatGetSize(A,&m,&n);CHKERRQ(ierr); 26 ierr = MatGetLocalSize(A,&lm,&ln);CHKERRQ(ierr); 27 ierr = PetscMalloc2(lm*sizeof(PetscInt),PetscInt,&d_nnz,lm*sizeof(PetscInt),PetscInt,&o_nnz);CHKERRQ(ierr); 28 29 k = 0; 30 ierr = MatGetOwnershipRange(A,&rstart,&rend);CHKERRQ(ierr); 31 for(i=rstart;i<rend;i++){ 32 d_nnz[k] = Aa->i[i+1-rstart] - Aa->diag[i-rstart]; 33 o_nnz[k] = Ba->i[i+1-rstart] - Ba->i[i-rstart]; 34 k++; 35 } 36 37 ierr = MatCreate(((PetscObject)A)->comm,&M);CHKERRQ(ierr); 38 ierr = MatSetSizes(M,lm,ln,m,n);CHKERRQ(ierr); 39 ierr = MatSetType(M,newtype);CHKERRQ(ierr); 40 ierr = MatMPISBAIJSetPreallocation(M,1,0,d_nnz,0,o_nnz);CHKERRQ(ierr); 41 42 ierr = PetscFree2(d_nnz,o_nnz);CHKERRQ(ierr); 43 44 for(i=rstart;i<rend;i++){ 45 ierr = MatGetRow(A,i,&nz,&cwork,&vwork);CHKERRQ(ierr); 46 j = 0; 47 while (cwork[j] < i){ j++; nz--;} 48 ierr = MatSetValues(M,1,&i,nz,cwork+j,vwork+j,INSERT_VALUES);CHKERRQ(ierr); 49 ierr = MatRestoreRow(A,i,&nz,&cwork,&vwork);CHKERRQ(ierr); 50 k++; 51 } 52 ierr = MatAssemblyBegin(M,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 53 ierr = MatAssemblyEnd(M,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 54 55 if (A->hermitian){ 56 ierr = MatSetOption(M,MAT_HERMITIAN,PETSC_TRUE);CHKERRQ(ierr); 57 } 58 59 if (reuse == MAT_REUSE_MATRIX) { 60 ierr = MatHeaderReplace(A,M);CHKERRQ(ierr); 61 } else { 62 *newmat = M; 63 } 64 PetscFunctionReturn(0); 65 } 66 EXTERN_C_END 67