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 PetscInt *d_nnz,*o_nnz; 16 PetscInt i,j,k,nz; 17 PetscInt m,n,lm,ln; 18 PetscInt rstart,rend; 19 const PetscScalar *vwork; 20 const PetscInt *cwork; 21 22 PetscFunctionBegin; 23 ierr = MatGetSize(A,&m,&n);CHKERRQ(ierr); 24 ierr = MatGetLocalSize(A,&lm,&ln);CHKERRQ(ierr); 25 ierr = PetscMalloc2(lm*sizeof(PetscInt),PetscInt,&d_nnz,lm*sizeof(PetscInt),PetscInt,&o_nnz);CHKERRQ(ierr); 26 27 k = 0; 28 ierr = MatGetOwnershipRange(A,&rstart,&rend);CHKERRQ(ierr); 29 for(i=rstart;i<rend;i++){ 30 ierr = MatGetRow(A,i,&nz,&cwork,&vwork);CHKERRQ(ierr); 31 d_nnz[k] = o_nnz[k] = 0; 32 for(j=0;j<nz;j++){ 33 if(cwork[j] >= rstart && cwork[j] <= rend-1){ /* diagonal portion */ 34 if(cwork[j] >= i) d_nnz[k] += 1; 35 } else { 36 /* insert values only in upper triangular portion */ 37 if(cwork[j] >= rend) o_nnz[k] += 1; /* off-diagonal portion */ 38 } 39 } 40 ierr = MatRestoreRow(A,i,&nz,&cwork,&vwork);CHKERRQ(ierr); 41 k++; 42 } 43 44 ierr = MatCreate(((PetscObject)A)->comm,&M);CHKERRQ(ierr); 45 ierr = MatSetSizes(M,lm,ln,m,n);CHKERRQ(ierr); 46 ierr = MatSetType(M,newtype);CHKERRQ(ierr); 47 ierr = MatMPISBAIJSetPreallocation(M,1,0,d_nnz,0,o_nnz);CHKERRQ(ierr); 48 49 ierr = PetscFree2(d_nnz,o_nnz);CHKERRQ(ierr); 50 51 for(i=rstart;i<rend;i++){ 52 ierr = MatGetRow(A,i,&nz,&cwork,&vwork);CHKERRQ(ierr); 53 j = 0; 54 while (cwork[j] < i){ j++; nz--;} 55 ierr = MatSetValues(M,1,&i,nz,cwork+j,vwork+j,INSERT_VALUES);CHKERRQ(ierr); 56 ierr = MatRestoreRow(A,i,&nz,&cwork,&vwork);CHKERRQ(ierr); 57 k++; 58 } 59 ierr = MatAssemblyBegin(M,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 60 ierr = MatAssemblyEnd(M,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 61 62 if (A->hermitian){ 63 ierr = MatSetOption(M,MAT_HERMITIAN,PETSC_TRUE);CHKERRQ(ierr); 64 } 65 66 if (reuse == MAT_REUSE_MATRIX) { 67 ierr = MatHeaderReplace(A,M);CHKERRQ(ierr); 68 } else { 69 *newmat = M; 70 } 71 PetscFunctionReturn(0); 72 } 73 EXTERN_C_END 74