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 PetscErrorCode MatAXPY_Transpose(Mat Y,PetscScalar a,Mat X,MatStructure str) 86 { 87 Mat_Transpose *Ya = (Mat_Transpose*)Y->data; 88 Mat_Transpose *Xa = (Mat_Transpose*)X->data; 89 Mat M = Ya->A; 90 Mat N = Xa->A; 91 PetscErrorCode ierr; 92 93 PetscFunctionBegin; 94 ierr = MatAXPY(M,a,N,str);CHKERRQ(ierr); 95 PetscFunctionReturn(0); 96 } 97 98 PetscErrorCode MatTransposeGetMat_Transpose(Mat A,Mat *M) 99 { 100 Mat_Transpose *Aa = (Mat_Transpose*)A->data; 101 102 PetscFunctionBegin; 103 *M = Aa->A; 104 PetscFunctionReturn(0); 105 } 106 107 /*@ 108 MatTransposeGetMat - Gets the Mat object stored inside a MATTRANSPOSEMAT 109 110 Logically collective on Mat 111 112 Input Parameter: 113 . A - the MATTRANSPOSE matrix 114 115 Output Parameter: 116 . M - the matrix object stored inside A 117 118 Level: intermediate 119 120 .seealso: MatCreateTranspose() 121 122 @*/ 123 PetscErrorCode MatTransposeGetMat(Mat A,Mat *M) 124 { 125 PetscErrorCode ierr; 126 127 PetscFunctionBegin; 128 PetscValidHeaderSpecific(A,MAT_CLASSID,1); 129 PetscValidType(A,1); 130 PetscValidPointer(M,2); 131 ierr = PetscUseMethod(A,"MatTransposeGetMat_C",(Mat,Mat*),(A,M));CHKERRQ(ierr); 132 PetscFunctionReturn(0); 133 } 134 135 /*@ 136 MatCreateTranspose - Creates a new matrix object that behaves like A' 137 138 Collective on Mat 139 140 Input Parameter: 141 . A - the (possibly rectangular) matrix 142 143 Output Parameter: 144 . N - the matrix that represents A' 145 146 Level: intermediate 147 148 Notes: 149 The transpose A' is NOT actually formed! Rather the new matrix 150 object performs the matrix-vector product by using the MatMultTranspose() on 151 the original matrix 152 153 .seealso: MatCreateNormal(), MatMult(), MatMultTranspose(), MatCreate() 154 155 @*/ 156 PetscErrorCode MatCreateTranspose(Mat A,Mat *N) 157 { 158 PetscErrorCode ierr; 159 PetscInt m,n; 160 Mat_Transpose *Na; 161 162 PetscFunctionBegin; 163 ierr = MatGetLocalSize(A,&m,&n);CHKERRQ(ierr); 164 ierr = MatCreate(PetscObjectComm((PetscObject)A),N);CHKERRQ(ierr); 165 ierr = MatSetSizes(*N,n,m,PETSC_DECIDE,PETSC_DECIDE);CHKERRQ(ierr); 166 ierr = PetscLayoutSetUp((*N)->rmap);CHKERRQ(ierr); 167 ierr = PetscLayoutSetUp((*N)->cmap);CHKERRQ(ierr); 168 ierr = PetscObjectChangeTypeName((PetscObject)*N,MATTRANSPOSEMAT);CHKERRQ(ierr); 169 170 ierr = PetscNewLog(*N,&Na);CHKERRQ(ierr); 171 (*N)->data = (void*) Na; 172 ierr = PetscObjectReference((PetscObject)A);CHKERRQ(ierr); 173 Na->A = A; 174 175 (*N)->ops->destroy = MatDestroy_Transpose; 176 (*N)->ops->mult = MatMult_Transpose; 177 (*N)->ops->multadd = MatMultAdd_Transpose; 178 (*N)->ops->multtranspose = MatMultTranspose_Transpose; 179 (*N)->ops->multtransposeadd = MatMultTransposeAdd_Transpose; 180 (*N)->ops->duplicate = MatDuplicate_Transpose; 181 (*N)->ops->getvecs = MatCreateVecs_Transpose; 182 (*N)->ops->axpy = MatAXPY_Transpose; 183 (*N)->assembled = PETSC_TRUE; 184 185 ierr = PetscObjectComposeFunction((PetscObject)(*N),"MatTransposeGetMat_C",MatTransposeGetMat_Transpose);CHKERRQ(ierr); 186 ierr = MatSetBlockSizes(*N,PetscAbs(A->cmap->bs),PetscAbs(A->rmap->bs));CHKERRQ(ierr); 187 ierr = MatSetUp(*N);CHKERRQ(ierr); 188 PetscFunctionReturn(0); 189 } 190 191