2: static char help[] = "Test interface of Elemental. \n\n";

  4:  #include <petscmat.h>

  6: int main(int argc,char **args)
  7: {
  8:   Mat            C,Caij;
  9:   PetscInt       i,j,m = 5,n,nrows,ncols;
 10:   const PetscInt *rows,*cols;
 11:   IS             isrows,iscols;
 13:   PetscBool      flg,Test_MatMatMult=PETSC_FALSE,mats_view=PETSC_FALSE;
 14:   PetscScalar    *v;
 15:   PetscMPIInt    rank,size;

 17:   PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr;
 18:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 19:   MPI_Comm_size(PETSC_COMM_WORLD,&size);
 20:   PetscOptionsHasName(NULL,NULL,"-mats_view",&mats_view);

 22:   /* Get local block or element size*/
 23:   PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL);
 24:   n    = m;
 25:   PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);

 27:   MatCreate(PETSC_COMM_WORLD,&C);
 28:   MatSetSizes(C,m,n,PETSC_DECIDE,PETSC_DECIDE);
 29:   MatSetType(C,MATELEMENTAL);
 30:   MatSetFromOptions(C);
 31:   MatSetUp(C);

 33:   PetscOptionsHasName(NULL,NULL,"-row_oriented",&flg);
 34:   if (flg) {MatSetOption(C,MAT_ROW_ORIENTED,PETSC_TRUE);}
 35:   MatGetOwnershipIS(C,&isrows,&iscols);
 36:   PetscOptionsHasName(NULL,NULL,"-Cexp_view_ownership",&flg);
 37:   if (flg) { /* View ownership of explicit C */
 38:     IS tmp;
 39:     PetscPrintf(PETSC_COMM_WORLD,"Ownership of explicit C:\n");
 40:     PetscPrintf(PETSC_COMM_WORLD,"Row index set:\n");
 41:     ISOnComm(isrows,PETSC_COMM_WORLD,PETSC_USE_POINTER,&tmp);
 42:     ISView(tmp,PETSC_VIEWER_STDOUT_WORLD);
 43:     ISDestroy(&tmp);
 44:     PetscPrintf(PETSC_COMM_WORLD,"Column index set:\n");
 45:     ISOnComm(iscols,PETSC_COMM_WORLD,PETSC_USE_POINTER,&tmp);
 46:     ISView(tmp,PETSC_VIEWER_STDOUT_WORLD);
 47:     ISDestroy(&tmp);
 48:   }

 50:   /* Set local matrix entries */
 51:   ISGetLocalSize(isrows,&nrows);
 52:   ISGetIndices(isrows,&rows);
 53:   ISGetLocalSize(iscols,&ncols);
 54:   ISGetIndices(iscols,&cols);
 55:   PetscMalloc1(nrows*ncols,&v);
 56:   for (i=0; i<nrows; i++) {
 57:     for (j=0; j<ncols; j++) {
 58:       /*v[i*ncols+j] = (PetscReal)(rank);*/
 59:       v[i*ncols+j] = (PetscReal)(rank*10000+100*rows[i]+cols[j]);
 60:     }
 61:   }
 62:   MatSetValues(C,nrows,rows,ncols,cols,v,INSERT_VALUES);
 63:   ISRestoreIndices(isrows,&rows);
 64:   ISRestoreIndices(iscols,&cols);
 65:   MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);
 66:   MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);

 68:   /* Test MatView() */
 69:   if (mats_view) {
 70:     MatView(C,PETSC_VIEWER_STDOUT_WORLD);
 71:   }

 73:   /* Test MatMissingDiagonal() */
 74:   MatMissingDiagonal(C,&flg,NULL);
 75:   if (flg) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_NOTSAMETYPE,"MatMissingDiagonal() did not return false!\n");

 77:   /* Set unowned matrix entries - add subdiagonals and diagonals from proc[0] */
 78:   if (!rank) {
 79:     PetscInt M,N,cols[2];
 80:     MatGetSize(C,&M,&N);
 81:     for (i=0; i<M; i++) {
 82:       cols[0] = i;   v[0] = i + 0.5;
 83:       cols[1] = i-1; v[1] = 0.5;
 84:       if (i) {
 85:         MatSetValues(C,1,&i,2,cols,v,ADD_VALUES);
 86:       } else {
 87:         MatSetValues(C,1,&i,1,&i,v,ADD_VALUES);
 88:       }
 89:     }
 90:   }
 91:   MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);
 92:   MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);

 94:   /* Test MatMult() */
 95:   MatComputeExplicitOperator(C,&Caij);
 96:   MatMultEqual(C,Caij,5,&flg);
 97:   if (!flg) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_NOTSAMETYPE,"C != Caij. MatMultEqual() fails");
 98:   MatMultTransposeEqual(C,Caij,5,&flg);
 99:   if (!flg) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_NOTSAMETYPE,"C != Caij. MatMultTransposeEqual() fails");

101:   /* Test MatMultAdd() and MatMultTransposeAddEqual() */
102:   MatMultAddEqual(C,Caij,5,&flg);
103:   if (!flg) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_NOTSAMETYPE,"C != Caij. MatMultAddEqual() fails");
104:   MatMultTransposeAddEqual(C,Caij,5,&flg);
105:   if (!flg) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_NOTSAMETYPE,"C != Caij. MatMultTransposeAddEqual() fails");

107:   /* Test MatMatMult() */
108:   PetscOptionsHasName(NULL,NULL,"-test_matmatmult",&Test_MatMatMult);
109:   if (Test_MatMatMult) {
110:     Mat CCelem,CCaij;
111:     MatMatMult(C,C,MAT_INITIAL_MATRIX,PETSC_DEFAULT,&CCelem);
112:     MatMatMult(Caij,Caij,MAT_INITIAL_MATRIX,PETSC_DEFAULT,&CCaij);
113:     MatMultEqual(CCelem,CCaij,5,&flg);
114:     if (!flg) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_NOTSAMETYPE,"CCelem != CCaij. MatMatMult() fails");
115:     MatDestroy(&CCaij);
116:     MatDestroy(&CCelem);
117:   }

119:   PetscFree(v);
120:   ISDestroy(&isrows);
121:   ISDestroy(&iscols);
122:   MatDestroy(&C);
123:   MatDestroy(&Caij);
124:   PetscFinalize();
125:   return ierr;
126: }