// @HEADER // *********************************************************************** // // Didasko Tutorial Package // Copyright (2005) Sandia Corporation // // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive // license for use of this work by or on behalf of the U.S. Government. // // This library is free software; you can redistribute it and/or modify // it under the terms of the GNU Lesser General Public License as // published by the Free Software Foundation; either version 2.1 of the // License, or (at your option) any later version. // // This library is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public // License along with this library; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 // USA // // Questions about Didasko? Contact Marzio Sala (marzio.sala _AT_ gmail.com) // // *********************************************************************** // @HEADER #include "Didasko_ConfigDefs.h" #if defined(HAVE_DIDASKO_TEUCHOS) #ifdef HAVE_MPI #include "mpi.h" #endif #include "Teuchos_BLAS.hpp" int main(int argc, char* argv[]) { #ifdef HAVE_MPI MPI_Init(&argc,&argv); #endif // Creating an instance of the BLAS class for double-precision kernels looks like: Teuchos::BLAS<int, double> blas; // This instance provides the access to all the BLAS kernels listed in Figure \ref{blas_kernels}: const int n = 10; double alpha = 2.0; double x[ n ]; for ( int i=0; i<n; i++ ) { x[i] = i; } blas.SCAL( n, alpha, x, 1 ); int max_idx = blas.IAMAX( n, x, 1 ); cout<< "The index of the maximum magnitude entry of x[] is the " << max_idx <<"-th and x[ " << max_idx-1 << " ] = "<< x[max_idx-1] << endl; #ifdef HAVE_MPI MPI_Finalize(); #endif return 0; } #else #include <stdlib.h> #include <stdio.h> int main(int argc, char *argv[]) { puts("Please configure Didasko with:\n" "--enable-teuchos"); return 0; } #endif