1471cc821SHong Zhang 2c6db04a5SJed Brown #include <../src/mat/impls/sbaij/mpi/mpisbaij.h> /*I "petscmat.h" I*/ 3c6db04a5SJed Brown #include <../src/mat/impls/aij/mpi/mpiaij.h> 4c6db04a5SJed Brown #include <private/matimpl.h> 5c6db04a5SJed Brown #include <petscmat.h> 6471cc821SHong Zhang 7471cc821SHong Zhang EXTERN_C_BEGIN 8471cc821SHong Zhang #undef __FUNCT__ 9471cc821SHong Zhang #define __FUNCT__ "MatConvert_MPIAIJ_MPISBAIJ" 107087cfbeSBarry Smith PetscErrorCode MatConvert_MPIAIJ_MPISBAIJ(Mat A, MatType newtype,MatReuse reuse,Mat *newmat) 11471cc821SHong Zhang { 12471cc821SHong Zhang PetscErrorCode ierr; 13949f5904SShri Abhyankar Mat M; 14549719c3SShri Abhyankar Mat_MPIAIJ *mpimat = (Mat_MPIAIJ*)A->data; 15549719c3SShri Abhyankar Mat_SeqAIJ *Aa = (Mat_SeqAIJ*)mpimat->A->data,*Ba = (Mat_SeqAIJ*)mpimat->B->data; 16949f5904SShri Abhyankar PetscInt *d_nnz,*o_nnz; 17293d3d0aSHong Zhang PetscInt i,j,nz; 18949f5904SShri Abhyankar PetscInt m,n,lm,ln; 19949f5904SShri Abhyankar PetscInt rstart,rend; 20949f5904SShri Abhyankar const PetscScalar *vwork; 21949f5904SShri Abhyankar const PetscInt *cwork; 22471cc821SHong Zhang 23471cc821SHong Zhang PetscFunctionBegin; 24*701b2c3fSHong Zhang if (!A->symmetric) SETERRQ(((PetscObject)A)->comm,PETSC_ERR_USER,"Matrix must be symmetric. Call MatSetOption(mat,MAT_SYMMETRIC,PETSC_TRUE)"); 25949f5904SShri Abhyankar ierr = MatGetSize(A,&m,&n);CHKERRQ(ierr); 26c4688eafSJed Brown ierr = MatGetLocalSize(A,&lm,&ln);CHKERRQ(ierr); 271667e675SShri Abhyankar ierr = PetscMalloc2(lm*sizeof(PetscInt),PetscInt,&d_nnz,lm*sizeof(PetscInt),PetscInt,&o_nnz);CHKERRQ(ierr); 28949f5904SShri Abhyankar 29293d3d0aSHong Zhang for(i=0;i<lm;i++){ 30293d3d0aSHong Zhang d_nnz[i] = Aa->i[i+1] - Aa->diag[i]; 31293d3d0aSHong Zhang o_nnz[i] = Ba->i[i+1] - Ba->i[i]; 32949f5904SShri Abhyankar } 3387f3aed4SHong Zhang 34949f5904SShri Abhyankar ierr = MatCreate(((PetscObject)A)->comm,&M);CHKERRQ(ierr); 35949f5904SShri Abhyankar ierr = MatSetSizes(M,lm,ln,m,n);CHKERRQ(ierr); 36949f5904SShri Abhyankar ierr = MatSetType(M,newtype);CHKERRQ(ierr); 37949f5904SShri Abhyankar ierr = MatMPISBAIJSetPreallocation(M,1,0,d_nnz,0,o_nnz);CHKERRQ(ierr); 38949f5904SShri Abhyankar 391667e675SShri Abhyankar ierr = PetscFree2(d_nnz,o_nnz);CHKERRQ(ierr); 40949f5904SShri Abhyankar 41293d3d0aSHong Zhang ierr = MatGetOwnershipRange(A,&rstart,&rend);CHKERRQ(ierr); 42949f5904SShri Abhyankar for(i=rstart;i<rend;i++){ 43949f5904SShri Abhyankar ierr = MatGetRow(A,i,&nz,&cwork,&vwork);CHKERRQ(ierr); 4487f3aed4SHong Zhang j = 0; 4587f3aed4SHong Zhang while (cwork[j] < i){ j++; nz--;} 4687f3aed4SHong Zhang ierr = MatSetValues(M,1,&i,nz,cwork+j,vwork+j,INSERT_VALUES);CHKERRQ(ierr); 47949f5904SShri Abhyankar ierr = MatRestoreRow(A,i,&nz,&cwork,&vwork);CHKERRQ(ierr); 48949f5904SShri Abhyankar } 49949f5904SShri Abhyankar ierr = MatAssemblyBegin(M,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 50949f5904SShri Abhyankar ierr = MatAssemblyEnd(M,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 51949f5904SShri Abhyankar 52949f5904SShri Abhyankar if (A->hermitian){ 53949f5904SShri Abhyankar ierr = MatSetOption(M,MAT_HERMITIAN,PETSC_TRUE);CHKERRQ(ierr); 54949f5904SShri Abhyankar } 55949f5904SShri Abhyankar 56949f5904SShri Abhyankar if (reuse == MAT_REUSE_MATRIX) { 57949f5904SShri Abhyankar ierr = MatHeaderReplace(A,M);CHKERRQ(ierr); 5887f3aed4SHong Zhang } else { 59949f5904SShri Abhyankar *newmat = M; 6087f3aed4SHong Zhang } 61471cc821SHong Zhang PetscFunctionReturn(0); 62471cc821SHong Zhang } 63471cc821SHong Zhang EXTERN_C_END 64