1 2 /* 3 Defines matrix-matrix product routines for pairs of MPIAIJ matrices 4 C = A^T * B 5 The routines are slightly modified from MatTransposeMatMultxxx_SeqAIJ_SeqDense(). 6 */ 7 #include <../src/mat/impls/aij/seq/aij.h> /*I "petscmat.h" I*/ 8 #include <../src/mat/impls/aij/mpi/mpiaij.h> 9 #include <../src/mat/impls/dense/mpi/mpidense.h> 10 11 PetscErrorCode MatDestroy_MPIDense_MatTransMatMult(void *data) 12 { 13 PetscErrorCode ierr; 14 Mat_MatTransMatMult *atb = (Mat_MatTransMatMult*)data; 15 16 PetscFunctionBegin; 17 ierr = MatDestroy(&atb->mA);CHKERRQ(ierr); 18 ierr = VecDestroy(&atb->bt);CHKERRQ(ierr); 19 ierr = VecDestroy(&atb->ct);CHKERRQ(ierr); 20 ierr = PetscFree(atb);CHKERRQ(ierr); 21 PetscFunctionReturn(0); 22 } 23 24 static PetscErrorCode MatTransposeMatMultNumeric_MPIAIJ_MPIDense(Mat,Mat,Mat); 25 26 PETSC_INTERN PetscErrorCode MatTransposeMatMultSymbolic_MPIAIJ_MPIDense(Mat A,Mat B,PetscReal fill,Mat C) 27 { 28 PetscErrorCode ierr; 29 Mat_MatTransMatMult *atb; 30 PetscBool cisdense; 31 32 PetscFunctionBegin; 33 MatCheckProduct(C,4); 34 if (C->product->data) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Extra product struct not empty"); 35 36 /* create output dense matrix C = A^T*B */ 37 ierr = MatSetSizes(C,A->cmap->n,B->cmap->n,A->cmap->N,B->cmap->N);CHKERRQ(ierr); 38 ierr = PetscObjectTypeCompareAny((PetscObject)C,&cisdense,MATMPIDENSE,MATMPIDENSECUDA,"");CHKERRQ(ierr); 39 if (!cisdense) { 40 ierr = MatSetType(C,((PetscObject)B)->type_name);CHKERRQ(ierr); 41 } 42 ierr = MatSetUp(C);CHKERRQ(ierr); 43 44 /* create additional data structure for the product */ 45 ierr = PetscNew(&atb);CHKERRQ(ierr); 46 if (B->cmap->N) { 47 ierr = MatCreateMAIJ(A,B->cmap->N,&atb->mA);CHKERRQ(ierr); 48 ierr = MatCreateVecs(atb->mA,&atb->ct,&atb->bt);CHKERRQ(ierr); 49 } 50 C->product->data = atb; 51 C->product->destroy = MatDestroy_MPIDense_MatTransMatMult; 52 53 C->ops->transposematmultnumeric = MatTransposeMatMultNumeric_MPIAIJ_MPIDense; 54 PetscFunctionReturn(0); 55 } 56 57 static PetscErrorCode MatTransposeMatMultNumeric_MPIAIJ_MPIDense(Mat A,Mat B,Mat C) 58 { 59 PetscErrorCode ierr; 60 const PetscScalar *Barray,*ctarray; 61 PetscScalar *Carray,*btarray; 62 Mat_MPIDense *b=(Mat_MPIDense*)B->data,*c=(Mat_MPIDense*)C->data; 63 Mat_SeqDense *bseq=(Mat_SeqDense*)(b->A)->data,*cseq=(Mat_SeqDense*)(c->A)->data; 64 PetscInt i,j,m=A->rmap->n,n=A->cmap->n,ldb=bseq->lda,BN=B->cmap->N,ldc=cseq->lda; 65 Mat_MatTransMatMult *atb; 66 Vec bt,ct; 67 68 PetscFunctionBegin; 69 MatCheckProduct(C,3); 70 atb=(Mat_MatTransMatMult *)C->product->data; 71 if (!atb) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Missing product struct"); 72 if (!BN) { 73 ierr = MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 74 ierr = MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 75 PetscFunctionReturn(0); 76 } 77 bt = atb->bt; 78 ct = atb->ct; 79 /* transpose local arry of B, then copy it to vector bt */ 80 ierr = MatDenseGetArrayRead(B,&Barray);CHKERRQ(ierr); 81 ierr = VecGetArray(bt,&btarray);CHKERRQ(ierr); 82 83 for (j=0; j<BN; j++) { 84 for (i=0; i<m; i++) btarray[i*BN + j] = Barray[j*ldb + i]; 85 } 86 ierr = VecRestoreArray(bt,&btarray);CHKERRQ(ierr); 87 ierr = MatDenseRestoreArrayRead(B,&Barray);CHKERRQ(ierr); 88 89 /* compute ct = mA^T * cb */ 90 ierr = MatMultTranspose(atb->mA,bt,ct);CHKERRQ(ierr); 91 92 /* transpose local array of ct to matrix C */ 93 ierr = MatDenseGetArray(C,&Carray);CHKERRQ(ierr); 94 ierr = VecGetArrayRead(ct,&ctarray);CHKERRQ(ierr); 95 96 for (j=0; j<BN; j++) { 97 for (i=0; i<n; i++) Carray[j*ldc + i] = ctarray[i*BN + j]; 98 } 99 ierr = VecRestoreArrayRead(ct,&ctarray);CHKERRQ(ierr); 100 ierr = MatDenseRestoreArray(C,&Carray);CHKERRQ(ierr); 101 ierr = MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 102 ierr = MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 103 PetscFunctionReturn(0); 104 } 105