1 2 #include <petsc/private/matimpl.h> /*I "petscmat.h" I*/ 3 4 typedef struct { 5 Mat A; 6 } Mat_Transpose; 7 8 PetscErrorCode MatMult_Transpose(Mat N,Vec x,Vec y) 9 { 10 Mat_Transpose *Na = (Mat_Transpose*)N->data; 11 PetscErrorCode ierr; 12 13 PetscFunctionBegin; 14 ierr = MatMultTranspose(Na->A,x,y);CHKERRQ(ierr); 15 PetscFunctionReturn(0); 16 } 17 18 PetscErrorCode MatMultAdd_Transpose(Mat N,Vec v1,Vec v2,Vec v3) 19 { 20 Mat_Transpose *Na = (Mat_Transpose*)N->data; 21 PetscErrorCode ierr; 22 23 PetscFunctionBegin; 24 ierr = MatMultTransposeAdd(Na->A,v1,v2,v3);CHKERRQ(ierr); 25 PetscFunctionReturn(0); 26 } 27 28 PetscErrorCode MatMultTranspose_Transpose(Mat N,Vec x,Vec y) 29 { 30 Mat_Transpose *Na = (Mat_Transpose*)N->data; 31 PetscErrorCode ierr; 32 33 PetscFunctionBegin; 34 ierr = MatMult(Na->A,x,y);CHKERRQ(ierr); 35 PetscFunctionReturn(0); 36 } 37 38 PetscErrorCode MatMultTransposeAdd_Transpose(Mat N,Vec v1,Vec v2,Vec v3) 39 { 40 Mat_Transpose *Na = (Mat_Transpose*)N->data; 41 PetscErrorCode ierr; 42 43 PetscFunctionBegin; 44 ierr = MatMultAdd(Na->A,v1,v2,v3);CHKERRQ(ierr); 45 PetscFunctionReturn(0); 46 } 47 48 PetscErrorCode MatDestroy_Transpose(Mat N) 49 { 50 Mat_Transpose *Na = (Mat_Transpose*)N->data; 51 PetscErrorCode ierr; 52 53 PetscFunctionBegin; 54 ierr = MatDestroy(&Na->A);CHKERRQ(ierr); 55 ierr = PetscObjectComposeFunction((PetscObject)N,"MatTransposeGetMat_C",NULL);CHKERRQ(ierr); 56 ierr = PetscFree(N->data);CHKERRQ(ierr); 57 PetscFunctionReturn(0); 58 } 59 60 PetscErrorCode MatDuplicate_Transpose(Mat N, MatDuplicateOption op, Mat* m) 61 { 62 Mat_Transpose *Na = (Mat_Transpose*)N->data; 63 PetscErrorCode ierr; 64 65 PetscFunctionBegin; 66 if (op == MAT_COPY_VALUES) { 67 ierr = MatTranspose(Na->A,MAT_INITIAL_MATRIX,m);CHKERRQ(ierr); 68 } else if (op == MAT_DO_NOT_COPY_VALUES) { 69 ierr = MatDuplicate(Na->A,MAT_DO_NOT_COPY_VALUES,m);CHKERRQ(ierr); 70 ierr = MatTranspose(*m,MAT_INPLACE_MATRIX,m);CHKERRQ(ierr); 71 } else SETERRQ(PetscObjectComm((PetscObject)N),PETSC_ERR_SUP,"MAT_SHARE_NONZERO_PATTERN not supported for this matrix type"); 72 PetscFunctionReturn(0); 73 } 74 75 PetscErrorCode MatCreateVecs_Transpose(Mat A,Vec *r, Vec *l) 76 { 77 Mat_Transpose *Aa = (Mat_Transpose*)A->data; 78 PetscErrorCode ierr; 79 80 PetscFunctionBegin; 81 ierr = MatCreateVecs(Aa->A,l,r);CHKERRQ(ierr); 82 PetscFunctionReturn(0); 83 } 84 85 86 PetscErrorCode MatTransposeGetMat_Transpose(Mat A,Mat *M) 87 { 88 Mat_Transpose *Aa = (Mat_Transpose*)A->data; 89 90 PetscFunctionBegin; 91 *M = Aa->A; 92 PetscFunctionReturn(0); 93 } 94 95 /*@ 96 MatTransposeGetMat - Gets the Mat object stored inside a MATTRANSPOSEMAT' 97 98 Logically collective on Mat 99 100 Input Parameter: 101 . A - the MATTRANSPOSE matrix 102 103 Output Parameter: 104 . M - the matrix object stored inside A 105 106 Level: intermediate 107 108 .seealso: MatCreateTranspose() 109 110 @*/ 111 PetscErrorCode MatTransposeGetMat(Mat A,Mat *M) 112 { 113 PetscErrorCode ierr; 114 115 PetscFunctionBegin; 116 PetscValidHeaderSpecific(A,MAT_CLASSID,1); 117 PetscValidType(A,1); 118 PetscValidPointer(M,2); 119 ierr = PetscUseMethod(A,"MatTransposeGetMat_C",(Mat,Mat*),(A,M));CHKERRQ(ierr); 120 PetscFunctionReturn(0); 121 } 122 123 /*@ 124 MatCreateTranspose - Creates a new matrix object that behaves like A' 125 126 Collective on Mat 127 128 Input Parameter: 129 . A - the (possibly rectangular) matrix 130 131 Output Parameter: 132 . N - the matrix that represents A' 133 134 Level: intermediate 135 136 Notes: 137 The transpose A' is NOT actually formed! Rather the new matrix 138 object performs the matrix-vector product by using the MatMultTranspose() on 139 the original matrix 140 141 .seealso: MatCreateNormal(), MatMult(), MatMultTranspose(), MatCreate() 142 143 @*/ 144 PetscErrorCode MatCreateTranspose(Mat A,Mat *N) 145 { 146 PetscErrorCode ierr; 147 PetscInt m,n; 148 Mat_Transpose *Na; 149 150 PetscFunctionBegin; 151 ierr = MatGetLocalSize(A,&m,&n);CHKERRQ(ierr); 152 ierr = MatCreate(PetscObjectComm((PetscObject)A),N);CHKERRQ(ierr); 153 ierr = MatSetSizes(*N,n,m,PETSC_DECIDE,PETSC_DECIDE);CHKERRQ(ierr); 154 ierr = PetscLayoutSetUp((*N)->rmap);CHKERRQ(ierr); 155 ierr = PetscLayoutSetUp((*N)->cmap);CHKERRQ(ierr); 156 ierr = PetscObjectChangeTypeName((PetscObject)*N,MATTRANSPOSEMAT);CHKERRQ(ierr); 157 158 ierr = PetscNewLog(*N,&Na);CHKERRQ(ierr); 159 (*N)->data = (void*) Na; 160 ierr = PetscObjectReference((PetscObject)A);CHKERRQ(ierr); 161 Na->A = A; 162 163 (*N)->ops->destroy = MatDestroy_Transpose; 164 (*N)->ops->mult = MatMult_Transpose; 165 (*N)->ops->multadd = MatMultAdd_Transpose; 166 (*N)->ops->multtranspose = MatMultTranspose_Transpose; 167 (*N)->ops->multtransposeadd = MatMultTransposeAdd_Transpose; 168 (*N)->ops->duplicate = MatDuplicate_Transpose; 169 (*N)->ops->getvecs = MatCreateVecs_Transpose; 170 (*N)->assembled = PETSC_TRUE; 171 172 ierr = PetscObjectComposeFunction((PetscObject)(*N),"MatTransposeGetMat_C",MatTransposeGetMat_Transpose);CHKERRQ(ierr); 173 ierr = MatSetBlockSizes(*N,PetscAbs(A->cmap->bs),PetscAbs(A->rmap->bs));CHKERRQ(ierr); 174 ierr = MatSetUp(*N);CHKERRQ(ierr); 175 PetscFunctionReturn(0); 176 } 177 178