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 9c4762a1bSJed Brown int main(int argc,char **args) 10c4762a1bSJed Brown { 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 17*9566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&args,(char*)0,help)); 18c4762a1bSJed Brown /* Load the matrix A */ 19*9566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL,NULL,"-f",file,sizeof(file),&flg)); 2028b400f6SJacob Faibussowitsch PetscCheck(flg,PETSC_COMM_WORLD,PETSC_ERR_USER,"Must indicate a file name for matrix A with the -f option."); 21c4762a1bSJed Brown 22*9566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&viewer)); 23*9566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD,&A)); 24*9566063dSJacob Faibussowitsch PetscCall(MatLoad(A,viewer)); 25*9566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&viewer)); 26c4762a1bSJed Brown 27*9566063dSJacob Faibussowitsch PetscCall(MatDuplicate(A,MAT_COPY_VALUES,&A1)); 28*9566063dSJacob Faibussowitsch PetscCall(MatDuplicate(A,MAT_COPY_VALUES,&A2)); 29c4762a1bSJed Brown 30c4762a1bSJed Brown /* dstMat = A*A1*A2 */ 31*9566063dSJacob Faibussowitsch PetscCall(MatMatMult(A1,A2,MAT_INITIAL_MATRIX,fill,&Mtmp)); 32*9566063dSJacob Faibussowitsch PetscCall(MatMatMult(A,Mtmp,MAT_INITIAL_MATRIX,fill,&dstMat)); 33*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&Mtmp)); 34c4762a1bSJed Brown 35c4762a1bSJed Brown /* dstMat += A1*A2 */ 36*9566063dSJacob Faibussowitsch PetscCall(MatMatMult(A1,A2,MAT_INITIAL_MATRIX,fill,&Mtmp)); 37*9566063dSJacob Faibussowitsch PetscCall(MatAXPY(dstMat,1.0,Mtmp,SUBSET_NONZERO_PATTERN)); 38*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&Mtmp)); 39c4762a1bSJed Brown 40c4762a1bSJed Brown /* dstMat += A*A1 */ 41*9566063dSJacob Faibussowitsch PetscCall(MatMatMult(A,A1,MAT_INITIAL_MATRIX,fill,&Mtmp)); 42*9566063dSJacob Faibussowitsch PetscCall(MatAXPY(dstMat, 1.0, Mtmp,SUBSET_NONZERO_PATTERN)); 43*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&Mtmp)); 44c4762a1bSJed Brown 45c4762a1bSJed Brown /* dstMat += A */ 46*9566063dSJacob Faibussowitsch PetscCall(MatAXPY(dstMat, 1.0, A,SUBSET_NONZERO_PATTERN)); 47c4762a1bSJed Brown 48*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 49*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A1)); 50*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A2)); 51*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&dstMat)); 52*9566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 53b122ec5aSJacob Faibussowitsch return 0; 54c4762a1bSJed Brown } 55