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  //@HEADER
  // ************************************************************************
  // 
  //               HPCCG: Simple Conjugate Gradient Benchmark Code
  //                 Copyright (2006) 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? Contact Michael A. Heroux (maherou@sandia.gov) 
  // 
  // ************************************************************************
  //@HEADER
  
  int waxpby (const int n, const double alpha, const double * const x, 
  	    const double beta, const double * const y, 
  		     double * const w);
  