1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests sequential and parallel MatMatMult() and MatAXPY(...,SUBSET_NONZERO_PATTERN) \n\ 3c4762a1bSJed Brown Input arguments are:\n\ 4c4762a1bSJed Brown -f <input_file> : file to load\n\n"; 5c4762a1bSJed Brown /* e.g., mpiexec -n 3 ./ex113 -f <file> */ 6c4762a1bSJed Brown 7c4762a1bSJed Brown #include <petscmat.h> 8c4762a1bSJed Brown 9*d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 10*d71ae5a4SJacob Faibussowitsch { 11c4762a1bSJed Brown Mat A, A1, A2, Mtmp, dstMat; 12c4762a1bSJed Brown PetscViewer viewer; 13c4762a1bSJed Brown PetscReal fill = 4.0; 14c4762a1bSJed Brown char file[128]; 15c4762a1bSJed Brown PetscBool flg; 16c4762a1bSJed Brown 17327415f7SBarry Smith PetscFunctionBeginUser; 189566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 19c4762a1bSJed Brown /* Load the matrix A */ 209566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL, NULL, "-f", file, sizeof(file), &flg)); 2128b400f6SJacob Faibussowitsch PetscCheck(flg, PETSC_COMM_WORLD, PETSC_ERR_USER, "Must indicate a file name for matrix A with the -f option."); 22c4762a1bSJed Brown 239566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &viewer)); 249566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &A)); 259566063dSJacob Faibussowitsch PetscCall(MatLoad(A, viewer)); 269566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&viewer)); 27c4762a1bSJed Brown 289566063dSJacob Faibussowitsch PetscCall(MatDuplicate(A, MAT_COPY_VALUES, &A1)); 299566063dSJacob Faibussowitsch PetscCall(MatDuplicate(A, MAT_COPY_VALUES, &A2)); 30c4762a1bSJed Brown 31c4762a1bSJed Brown /* dstMat = A*A1*A2 */ 329566063dSJacob Faibussowitsch PetscCall(MatMatMult(A1, A2, MAT_INITIAL_MATRIX, fill, &Mtmp)); 339566063dSJacob Faibussowitsch PetscCall(MatMatMult(A, Mtmp, MAT_INITIAL_MATRIX, fill, &dstMat)); 349566063dSJacob Faibussowitsch PetscCall(MatDestroy(&Mtmp)); 35c4762a1bSJed Brown 36c4762a1bSJed Brown /* dstMat += A1*A2 */ 379566063dSJacob Faibussowitsch PetscCall(MatMatMult(A1, A2, MAT_INITIAL_MATRIX, fill, &Mtmp)); 389566063dSJacob Faibussowitsch PetscCall(MatAXPY(dstMat, 1.0, Mtmp, SUBSET_NONZERO_PATTERN)); 399566063dSJacob Faibussowitsch PetscCall(MatDestroy(&Mtmp)); 40c4762a1bSJed Brown 41c4762a1bSJed Brown /* dstMat += A*A1 */ 429566063dSJacob Faibussowitsch PetscCall(MatMatMult(A, A1, MAT_INITIAL_MATRIX, fill, &Mtmp)); 439566063dSJacob Faibussowitsch PetscCall(MatAXPY(dstMat, 1.0, Mtmp, SUBSET_NONZERO_PATTERN)); 449566063dSJacob Faibussowitsch PetscCall(MatDestroy(&Mtmp)); 45c4762a1bSJed Brown 46c4762a1bSJed Brown /* dstMat += A */ 479566063dSJacob Faibussowitsch PetscCall(MatAXPY(dstMat, 1.0, A, SUBSET_NONZERO_PATTERN)); 48c4762a1bSJed Brown 499566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 509566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A1)); 519566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A2)); 529566063dSJacob Faibussowitsch PetscCall(MatDestroy(&dstMat)); 539566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 54b122ec5aSJacob Faibussowitsch return 0; 55c4762a1bSJed Brown } 56