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 MatTransposeGetMat_Transpose(Mat A,Mat *M) 76 { 77 Mat_Transpose *Aa = (Mat_Transpose*)A->data; 78 79 PetscFunctionBegin; 80 *M = Aa->A; 81 PetscFunctionReturn(0); 82 } 83 84 /*@ 85 MatTransposeGetMat - Gets the Mat object stored inside a MATTRANSPOSEMAT' 86 87 Logically collective on Mat 88 89 Input Parameter: 90 . A - the MATTRANSPOSE matrix 91 92 Output Parameter: 93 . M - the matrix object stored inside A 94 95 Level: intermediate 96 97 .seealso: MatCreateTranspose() 98 99 @*/ 100 PetscErrorCode MatTransposeGetMat(Mat A,Mat *M) 101 { 102 PetscErrorCode ierr; 103 104 PetscFunctionBegin; 105 PetscValidHeaderSpecific(A,MAT_CLASSID,1); 106 PetscValidType(A,1); 107 PetscValidPointer(M,2); 108 ierr = PetscUseMethod(A,"MatTransposeGetMat_C",(Mat,Mat*),(A,M));CHKERRQ(ierr); 109 PetscFunctionReturn(0); 110 } 111 112 /*@ 113 MatCreateTranspose - Creates a new matrix object that behaves like A' 114 115 Collective on Mat 116 117 Input Parameter: 118 . A - the (possibly rectangular) matrix 119 120 Output Parameter: 121 . N - the matrix that represents A' 122 123 Level: intermediate 124 125 Notes: 126 The transpose A' is NOT actually formed! Rather the new matrix 127 object performs the matrix-vector product by using the MatMultTranspose() on 128 the original matrix 129 130 .seealso: MatCreateNormal(), MatMult(), MatMultTranspose(), MatCreate() 131 132 @*/ 133 PetscErrorCode MatCreateTranspose(Mat A,Mat *N) 134 { 135 PetscErrorCode ierr; 136 PetscInt m,n; 137 Mat_Transpose *Na; 138 139 PetscFunctionBegin; 140 ierr = MatGetLocalSize(A,&m,&n);CHKERRQ(ierr); 141 ierr = MatCreate(PetscObjectComm((PetscObject)A),N);CHKERRQ(ierr); 142 ierr = MatSetSizes(*N,n,m,PETSC_DECIDE,PETSC_DECIDE);CHKERRQ(ierr); 143 ierr = PetscLayoutSetUp((*N)->rmap);CHKERRQ(ierr); 144 ierr = PetscLayoutSetUp((*N)->cmap);CHKERRQ(ierr); 145 ierr = PetscObjectChangeTypeName((PetscObject)*N,MATTRANSPOSEMAT);CHKERRQ(ierr); 146 147 ierr = PetscNewLog(*N,&Na);CHKERRQ(ierr); 148 (*N)->data = (void*) Na; 149 ierr = PetscObjectReference((PetscObject)A);CHKERRQ(ierr); 150 Na->A = A; 151 152 (*N)->ops->destroy = MatDestroy_Transpose; 153 (*N)->ops->mult = MatMult_Transpose; 154 (*N)->ops->multadd = MatMultAdd_Transpose; 155 (*N)->ops->multtranspose = MatMultTranspose_Transpose; 156 (*N)->ops->multtransposeadd = MatMultTransposeAdd_Transpose; 157 (*N)->ops->duplicate = MatDuplicate_Transpose; 158 (*N)->assembled = PETSC_TRUE; 159 160 ierr = PetscObjectComposeFunction((PetscObject)(*N),"MatTransposeGetMat_C",MatTransposeGetMat_Transpose);CHKERRQ(ierr); 161 ierr = MatSetBlockSizes(*N,PetscAbs(A->cmap->bs),PetscAbs(A->rmap->bs));CHKERRQ(ierr); 162 ierr = MatSetUp(*N);CHKERRQ(ierr); 163 PetscFunctionReturn(0); 164 } 165 166