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 MatHasOperation_Transpose(Mat mat,MatOperation op,PetscBool *has) 99 { 100 Mat_Transpose *X = (Mat_Transpose*)mat->data; 101 PetscErrorCode ierr; 102 PetscFunctionBegin; 103 104 *has = PETSC_FALSE; 105 if (op == MATOP_MAT_MULT || op == MATOP_TRANSPOSE_MAT_MULT) { 106 ierr = MatHasOperation(X->A,op == MATOP_MAT_MULT ? MATOP_TRANSPOSE_MAT_MULT : MATOP_MAT_MULT,has);CHKERRQ(ierr); 107 } 108 else if (((void**)mat->ops)[op]) *has = PETSC_TRUE; 109 PetscFunctionReturn(0); 110 } 111 112 PetscErrorCode MatTransposeGetMat_Transpose(Mat A,Mat *M) 113 { 114 Mat_Transpose *Aa = (Mat_Transpose*)A->data; 115 116 PetscFunctionBegin; 117 *M = Aa->A; 118 PetscFunctionReturn(0); 119 } 120 121 /*@ 122 MatTransposeGetMat - Gets the Mat object stored inside a MATTRANSPOSEMAT 123 124 Logically collective on Mat 125 126 Input Parameter: 127 . A - the MATTRANSPOSE matrix 128 129 Output Parameter: 130 . M - the matrix object stored inside A 131 132 Level: intermediate 133 134 .seealso: MatCreateTranspose() 135 136 @*/ 137 PetscErrorCode MatTransposeGetMat(Mat A,Mat *M) 138 { 139 PetscErrorCode ierr; 140 141 PetscFunctionBegin; 142 PetscValidHeaderSpecific(A,MAT_CLASSID,1); 143 PetscValidType(A,1); 144 PetscValidPointer(M,2); 145 ierr = PetscUseMethod(A,"MatTransposeGetMat_C",(Mat,Mat*),(A,M));CHKERRQ(ierr); 146 PetscFunctionReturn(0); 147 } 148 149 /*@ 150 MatCreateTranspose - Creates a new matrix object that behaves like A' 151 152 Collective on Mat 153 154 Input Parameter: 155 . A - the (possibly rectangular) matrix 156 157 Output Parameter: 158 . N - the matrix that represents A' 159 160 Level: intermediate 161 162 Notes: 163 The transpose A' is NOT actually formed! Rather the new matrix 164 object performs the matrix-vector product by using the MatMultTranspose() on 165 the original matrix 166 167 .seealso: MatCreateNormal(), MatMult(), MatMultTranspose(), MatCreate() 168 169 @*/ 170 PetscErrorCode MatCreateTranspose(Mat A,Mat *N) 171 { 172 PetscErrorCode ierr; 173 PetscInt m,n; 174 Mat_Transpose *Na; 175 176 PetscFunctionBegin; 177 ierr = MatGetLocalSize(A,&m,&n);CHKERRQ(ierr); 178 ierr = MatCreate(PetscObjectComm((PetscObject)A),N);CHKERRQ(ierr); 179 ierr = MatSetSizes(*N,n,m,PETSC_DECIDE,PETSC_DECIDE);CHKERRQ(ierr); 180 ierr = PetscLayoutSetUp((*N)->rmap);CHKERRQ(ierr); 181 ierr = PetscLayoutSetUp((*N)->cmap);CHKERRQ(ierr); 182 ierr = PetscObjectChangeTypeName((PetscObject)*N,MATTRANSPOSEMAT);CHKERRQ(ierr); 183 184 ierr = PetscNewLog(*N,&Na);CHKERRQ(ierr); 185 (*N)->data = (void*) Na; 186 ierr = PetscObjectReference((PetscObject)A);CHKERRQ(ierr); 187 Na->A = A; 188 189 (*N)->ops->destroy = MatDestroy_Transpose; 190 (*N)->ops->mult = MatMult_Transpose; 191 (*N)->ops->multadd = MatMultAdd_Transpose; 192 (*N)->ops->multtranspose = MatMultTranspose_Transpose; 193 (*N)->ops->multtransposeadd = MatMultTransposeAdd_Transpose; 194 (*N)->ops->duplicate = MatDuplicate_Transpose; 195 (*N)->ops->getvecs = MatCreateVecs_Transpose; 196 (*N)->ops->axpy = MatAXPY_Transpose; 197 (*N)->ops->hasoperation = MatHasOperation_Transpose; 198 (*N)->assembled = PETSC_TRUE; 199 200 ierr = PetscObjectComposeFunction((PetscObject)(*N),"MatTransposeGetMat_C",MatTransposeGetMat_Transpose);CHKERRQ(ierr); 201 ierr = MatSetBlockSizes(*N,PetscAbs(A->cmap->bs),PetscAbs(A->rmap->bs));CHKERRQ(ierr); 202 ierr = MatSetUp(*N);CHKERRQ(ierr); 203 PetscFunctionReturn(0); 204 } 205 206