//=====================================================
// File   :  action_symv.hh
// Author :  L. Plagne <laurent.plagne@edf.fr)>
// Copyright (C) EDF R&D,  lun sep 30 14:23:19 CEST 2002
//=====================================================
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program 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 General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//
#ifndef ACTION_SYMV
#define ACTION_SYMV
#include "utilities.h"
#include "STL_interface.hh"
#include <string>
#include "init/init_function.hh"
#include "init/init_vector.hh"
#include "init/init_matrix.hh"

using namespace std;

template<class Interface>
class Action_symv {

public :

  // Ctor

  BTL_DONT_INLINE Action_symv( int size ):_size(size)
  {
    MESSAGE("Action_symv Ctor");

    // STL matrix and vector initialization
    init_matrix_symm<pseudo_random>(A_stl,_size);
    init_vector<pseudo_random>(B_stl,_size);
    init_vector<null_function>(X_stl,_size);
    init_vector<null_function>(resu_stl,_size);

    // generic matrix and vector initialization
    Interface::matrix_from_stl(A_ref,A_stl);
    Interface::matrix_from_stl(A,A_stl);
    Interface::vector_from_stl(B_ref,B_stl);
    Interface::vector_from_stl(B,B_stl);
    Interface::vector_from_stl(X_ref,X_stl);
    Interface::vector_from_stl(X,X_stl);

  }

  // invalidate copy ctor

  Action_symv( const  Action_symv & )
  {
    INFOS("illegal call to Action_symv Copy Ctor");
    exit(1);
  }

  // Dtor
  BTL_DONT_INLINE ~Action_symv( void ){
    Interface::free_matrix(A,_size);
    Interface::free_vector(B);
    Interface::free_vector(X);
    Interface::free_matrix(A_ref,_size);
    Interface::free_vector(B_ref);
    Interface::free_vector(X_ref);
  }

  // action name

  static inline std::string name( void )
  {
    return "symv_" + Interface::name();
  }

  double nb_op_base( void ){
    return 2.0*_size*_size;
  }

  BTL_DONT_INLINE  void initialize( void ){

    Interface::copy_matrix(A_ref,A,_size);
    Interface::copy_vector(B_ref,B,_size);
    Interface::copy_vector(X_ref,X,_size);

  }

  BTL_DONT_INLINE void calculate( void ) {
      BTL_ASM_COMMENT("#begin symv");
      Interface::symv(A,B,X,_size);
      BTL_ASM_COMMENT("end symv");
  }

  BTL_DONT_INLINE void check_result( void ){
    if (_size>128) return;
    // calculation check
    Interface::vector_to_stl(X,resu_stl);

    STL_interface<typename Interface::real_type>::symv(A_stl,B_stl,X_stl,_size);

    typename Interface::real_type error=
      STL_interface<typename Interface::real_type>::norm_diff(X_stl,resu_stl);

    if (error>1.e-5){
      INFOS("WRONG CALCULATION...residual=" << error);
      exit(0);
    }

  }

private :

  typename Interface::stl_matrix A_stl;
  typename Interface::stl_vector B_stl;
  typename Interface::stl_vector X_stl;
  typename Interface::stl_vector resu_stl;

  typename Interface::gene_matrix A_ref;
  typename Interface::gene_vector B_ref;
  typename Interface::gene_vector X_ref;

  typename Interface::gene_matrix A;
  typename Interface::gene_vector B;
  typename Interface::gene_vector X;


  int _size;

};


#endif