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