1 2 #include <../src/mat/impls/baij/seq/baij.h> 3 4 PETSC_INTERN PetscErrorCode MatConvert_SeqBAIJ_SeqAIJ(Mat A, MatType newtype,MatReuse reuse,Mat *newmat) 5 { 6 Mat B; 7 Mat_SeqAIJ *b; 8 PetscBool roworiented; 9 Mat_SeqBAIJ *a = (Mat_SeqBAIJ*)A->data; 10 PetscErrorCode ierr; 11 PetscInt bs = A->rmap->bs,*ai = a->i,*aj = a->j,n = A->rmap->N/bs,i,j,k; 12 PetscInt *rowlengths,*rows,*cols,maxlen = 0,ncols; 13 MatScalar *aa = a->a; 14 15 PetscFunctionBegin; 16 if (reuse == MAT_REUSE_MATRIX) { 17 B = *newmat; 18 for (i=0; i<n; i++) { 19 maxlen = PetscMax(maxlen,(ai[i+1] - ai[i])); 20 } 21 } else { 22 ierr = PetscMalloc1(n*bs,&rowlengths);CHKERRQ(ierr); 23 for (i=0; i<n; i++) { 24 maxlen = PetscMax(maxlen,(ai[i+1] - ai[i])); 25 for (j=0; j<bs; j++) { 26 rowlengths[i*bs+j] = bs*(ai[i+1] - ai[i]); 27 } 28 } 29 ierr = MatCreate(PetscObjectComm((PetscObject)A),&B);CHKERRQ(ierr); 30 ierr = MatSetType(B,MATSEQAIJ);CHKERRQ(ierr); 31 ierr = MatSetSizes(B,A->rmap->n,A->cmap->n,A->rmap->N,A->cmap->N);CHKERRQ(ierr); 32 ierr = MatSetBlockSizes(B,A->rmap->bs,A->cmap->bs);CHKERRQ(ierr); 33 ierr = MatSeqAIJSetPreallocation(B,0,rowlengths);CHKERRQ(ierr); 34 ierr = PetscFree(rowlengths);CHKERRQ(ierr); 35 } 36 b = (Mat_SeqAIJ*)B->data; 37 roworiented = b->roworiented; 38 39 ierr = MatSetOption(B,MAT_ROW_ORIENTED,PETSC_FALSE);CHKERRQ(ierr); 40 ierr = PetscMalloc1(bs,&rows);CHKERRQ(ierr); 41 ierr = PetscMalloc1(bs*maxlen,&cols);CHKERRQ(ierr); 42 for (i=0; i<n; i++) { 43 for (j=0; j<bs; j++) { 44 rows[j] = i*bs+j; 45 } 46 ncols = ai[i+1] - ai[i]; 47 for (k=0; k<ncols; k++) { 48 for (j=0; j<bs; j++) { 49 cols[k*bs+j] = bs*(*aj) + j; 50 } 51 aj++; 52 } 53 ierr = MatSetValues(B,bs,rows,bs*ncols,cols,aa,INSERT_VALUES);CHKERRQ(ierr); 54 aa += ncols*bs*bs; 55 } 56 ierr = PetscFree(cols);CHKERRQ(ierr); 57 ierr = PetscFree(rows);CHKERRQ(ierr); 58 ierr = MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 59 ierr = MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 60 ierr = MatSetOption(B,MAT_ROW_ORIENTED,roworiented);CHKERRQ(ierr); 61 62 if (reuse == MAT_INPLACE_MATRIX) { 63 ierr = MatHeaderReplace(A,&B);CHKERRQ(ierr); 64 } else { 65 *newmat = B; 66 } 67 PetscFunctionReturn(0); 68 } 69 70 #include <../src/mat/impls/aij/seq/aij.h> 71 72 PETSC_INTERN PetscErrorCode MatConvert_SeqAIJ_SeqBAIJ(Mat A,MatType newtype,MatReuse reuse,Mat *newmat) 73 { 74 Mat B; 75 Mat_SeqAIJ *a = (Mat_SeqAIJ*)A->data; 76 Mat_SeqBAIJ *b; 77 PetscErrorCode ierr; 78 PetscInt *ai=a->i,m=A->rmap->N,n=A->cmap->N,i,*rowlengths; 79 80 PetscFunctionBegin; 81 if (A->rmap->bs > 1) { 82 ierr = MatConvert_Basic(A,newtype,reuse,newmat);CHKERRQ(ierr); 83 PetscFunctionReturn(0); 84 } 85 if (reuse != MAT_REUSE_MATRIX) { 86 ierr = PetscMalloc1(m,&rowlengths);CHKERRQ(ierr); 87 for (i=0; i<m; i++) { 88 rowlengths[i] = ai[i+1] - ai[i]; 89 } 90 ierr = MatCreate(PetscObjectComm((PetscObject)A),&B);CHKERRQ(ierr); 91 ierr = MatSetSizes(B,m,n,m,n);CHKERRQ(ierr); 92 ierr = MatSetType(B,MATSEQBAIJ);CHKERRQ(ierr); 93 ierr = MatSeqBAIJSetPreallocation(B,1,0,rowlengths);CHKERRQ(ierr); 94 ierr = PetscFree(rowlengths);CHKERRQ(ierr); 95 } else B = *newmat; 96 97 ierr = MatSetOption(B,MAT_ROW_ORIENTED,PETSC_TRUE);CHKERRQ(ierr); 98 99 b = (Mat_SeqBAIJ*)(B->data); 100 101 ierr = PetscArraycpy(b->i,a->i,m+1);CHKERRQ(ierr); 102 ierr = PetscArraycpy(b->ilen,a->ilen,m);CHKERRQ(ierr); 103 ierr = PetscArraycpy(b->j,a->j,a->nz);CHKERRQ(ierr); 104 ierr = PetscArraycpy(b->a,a->a,a->nz);CHKERRQ(ierr); 105 106 ierr = MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 107 ierr = MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 108 109 if (reuse == MAT_INPLACE_MATRIX) { 110 ierr = MatHeaderReplace(A,&B);CHKERRQ(ierr); 111 } else { 112 *newmat = B; 113 } 114 PetscFunctionReturn(0); 115 } 116