1 2 #include <petsc-private/matimpl.h> /*I "petscmat.h" I*/ 3 4 typedef struct { 5 Mat A; 6 } Mat_Transpose; 7 8 #undef __FUNCT__ 9 #define __FUNCT__ "MatMult_Transpose" 10 PetscErrorCode MatMult_Transpose(Mat N,Vec x,Vec y) 11 { 12 Mat_Transpose *Na = (Mat_Transpose*)N->data; 13 PetscErrorCode ierr; 14 15 PetscFunctionBegin; 16 ierr = MatMultTranspose(Na->A,x,y);CHKERRQ(ierr); 17 PetscFunctionReturn(0); 18 } 19 20 #undef __FUNCT__ 21 #define __FUNCT__ "MatMultAdd_Transpose" 22 PetscErrorCode MatMultAdd_Transpose(Mat N,Vec v1,Vec v2,Vec v3) 23 { 24 Mat_Transpose *Na = (Mat_Transpose*)N->data; 25 PetscErrorCode ierr; 26 27 PetscFunctionBegin; 28 ierr = MatMultTransposeAdd(Na->A,v1,v2,v3);CHKERRQ(ierr); 29 PetscFunctionReturn(0); 30 } 31 32 #undef __FUNCT__ 33 #define __FUNCT__ "MatMultTranspose_Transpose" 34 PetscErrorCode MatMultTranspose_Transpose(Mat N,Vec x,Vec y) 35 { 36 Mat_Transpose *Na = (Mat_Transpose*)N->data; 37 PetscErrorCode ierr; 38 39 PetscFunctionBegin; 40 ierr = MatMult(Na->A,x,y);CHKERRQ(ierr); 41 PetscFunctionReturn(0); 42 } 43 44 #undef __FUNCT__ 45 #define __FUNCT__ "MatMultTransposeAdd_Transpose" 46 PetscErrorCode MatMultTransposeAdd_Transpose(Mat N,Vec v1,Vec v2,Vec v3) 47 { 48 Mat_Transpose *Na = (Mat_Transpose*)N->data; 49 PetscErrorCode ierr; 50 51 PetscFunctionBegin; 52 ierr = MatMultAdd(Na->A,v1,v2,v3);CHKERRQ(ierr); 53 PetscFunctionReturn(0); 54 } 55 56 #undef __FUNCT__ 57 #define __FUNCT__ "MatDestroy_Transpose" 58 PetscErrorCode MatDestroy_Transpose(Mat N) 59 { 60 Mat_Transpose *Na = (Mat_Transpose*)N->data; 61 PetscErrorCode ierr; 62 63 PetscFunctionBegin; 64 ierr = MatDestroy(&Na->A);CHKERRQ(ierr); 65 ierr = PetscFree(N->data);CHKERRQ(ierr); 66 PetscFunctionReturn(0); 67 } 68 69 #undef __FUNCT__ 70 #define __FUNCT__ "MatCreateTranspose" 71 /*@ 72 MatCreateTranspose - Creates a new matrix object that behaves like A' 73 74 Collective on Mat 75 76 Input Parameter: 77 . A - the (possibly rectangular) matrix 78 79 Output Parameter: 80 . N - the matrix that represents A' 81 82 Level: intermediate 83 84 Notes: The transpose A' is NOT actually formed! Rather the new matrix 85 object performs the matrix-vector product by using the MatMultTranspose() on 86 the original matrix 87 88 .seealso: MatCreateNormal(), MatMult(), MatMultTranspose(), MatCreate() 89 90 @*/ 91 PetscErrorCode MatCreateTranspose(Mat A,Mat *N) 92 { 93 PetscErrorCode ierr; 94 PetscInt m,n; 95 Mat_Transpose *Na; 96 97 PetscFunctionBegin; 98 ierr = MatGetLocalSize(A,&m,&n);CHKERRQ(ierr); 99 ierr = MatCreate(PetscObjectComm((PetscObject)A),N);CHKERRQ(ierr); 100 ierr = MatSetSizes(*N,n,m,PETSC_DECIDE,PETSC_DECIDE);CHKERRQ(ierr); 101 ierr = PetscLayoutSetUp((*N)->rmap);CHKERRQ(ierr); 102 ierr = PetscLayoutSetUp((*N)->cmap);CHKERRQ(ierr); 103 ierr = PetscObjectChangeTypeName((PetscObject)*N,MATTRANSPOSEMAT);CHKERRQ(ierr); 104 105 ierr = PetscNewLog(*N,&Na);CHKERRQ(ierr); 106 (*N)->data = (void*) Na; 107 ierr = PetscObjectReference((PetscObject)A);CHKERRQ(ierr); 108 Na->A = A; 109 110 (*N)->ops->destroy = MatDestroy_Transpose; 111 (*N)->ops->mult = MatMult_Transpose; 112 (*N)->ops->multadd = MatMultAdd_Transpose; 113 (*N)->ops->multtranspose = MatMultTranspose_Transpose; 114 (*N)->ops->multtransposeadd = MatMultTransposeAdd_Transpose; 115 (*N)->assembled = PETSC_TRUE; 116 117 ierr = MatSetBlockSizes(*N,PetscAbs(A->cmap->bs),PetscAbs(A->rmap->bs));CHKERRQ(ierr); 118 ierr = MatSetUp(*N);CHKERRQ(ierr); 119 PetscFunctionReturn(0); 120 } 121 122