Grid/lib/lattice/Lattice_overload.h

/*************************************************************************************

    Grid physics library, www.github.com/paboyle/Grid 

    Source file: ./lib/lattice/Lattice_overload.h

    Copyright (C) 2015

Author: Peter Boyle <paboyle@ph.ed.ac.uk>

    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.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

    See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/*  END LEGAL */
#ifndef GRID_LATTICE_OVERLOAD_H
#define GRID_LATTICE_OVERLOAD_H

NAMESPACE_BEGIN(Grid);

//////////////////////////////////////////////////////////////////////////////////////////////////////
// unary negation
//////////////////////////////////////////////////////////////////////////////////////////////////////
template<class vobj>
inline Lattice<vobj> operator -(const Lattice<vobj> &r)
{
  Lattice<vobj> ret(r._grid);
  parallel_for(int ss=0;ss<r._grid->oSites();ss++){
    vstream(ret._odata[ss], -r._odata[ss]);
  }
  return ret;
} 
/////////////////////////////////////////////////////////////////////////////////////
// Lattice BinOp Lattice,
//NB mult performs conformable check. Do not reapply here for performance.
/////////////////////////////////////////////////////////////////////////////////////
template<class left,class right>
inline auto operator * (const Lattice<left> &lhs,const Lattice<right> &rhs)-> Lattice<decltype(lhs._odata[0]*rhs._odata[0])>
{
  Lattice<decltype(lhs._odata[0]*rhs._odata[0])> ret(rhs._grid);
  mult(ret,lhs,rhs);
  return ret;
}
template<class left,class right>
inline auto operator + (const Lattice<left> &lhs,const Lattice<right> &rhs)-> Lattice<decltype(lhs._odata[0]+rhs._odata[0])>
{
  Lattice<decltype(lhs._odata[0]+rhs._odata[0])> ret(rhs._grid);
  add(ret,lhs,rhs);
  return ret;
}
template<class left,class right>
inline auto operator - (const Lattice<left> &lhs,const Lattice<right> &rhs)-> Lattice<decltype(lhs._odata[0]-rhs._odata[0])>
{
  Lattice<decltype(lhs._odata[0]-rhs._odata[0])> ret(rhs._grid);
  sub(ret,lhs,rhs);
  return ret;
}
  
// Scalar BinOp Lattice ;generate return type
template<class left,class right>
inline auto operator * (const left &lhs,const Lattice<right> &rhs) -> Lattice<decltype(lhs*rhs._odata[0])>
{
  Lattice<decltype(lhs*rhs._odata[0])> ret(rhs._grid);
  parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
    decltype(lhs*rhs._odata[0]) tmp=lhs*rhs._odata[ss]; 
    vstream(ret._odata[ss],tmp);
    //      ret._odata[ss]=lhs*rhs._odata[ss];
  }
  return ret;
}
template<class left,class right>
inline auto operator + (const left &lhs,const Lattice<right> &rhs) -> Lattice<decltype(lhs+rhs._odata[0])>
{
  Lattice<decltype(lhs+rhs._odata[0])> ret(rhs._grid);
  parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
    decltype(lhs+rhs._odata[0]) tmp =lhs-rhs._odata[ss];  
    vstream(ret._odata[ss],tmp);
    //	ret._odata[ss]=lhs+rhs._odata[ss];
  }
  return ret;
}
template<class left,class right>
inline auto operator - (const left &lhs,const Lattice<right> &rhs) -> Lattice<decltype(lhs-rhs._odata[0])>
{
  Lattice<decltype(lhs-rhs._odata[0])> ret(rhs._grid);
  parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
    decltype(lhs-rhs._odata[0]) tmp=lhs-rhs._odata[ss];  
    vstream(ret._odata[ss],tmp);
  }
  return ret;
}
template<class left,class right>
inline auto operator * (const Lattice<left> &lhs,const right &rhs) -> Lattice<decltype(lhs._odata[0]*rhs)>
{
  Lattice<decltype(lhs._odata[0]*rhs)> ret(lhs._grid);
  parallel_for(int ss=0;ss<lhs._grid->oSites(); ss++){
    decltype(lhs._odata[0]*rhs) tmp =lhs._odata[ss]*rhs;
    vstream(ret._odata[ss],tmp);
    //            ret._odata[ss]=lhs._odata[ss]*rhs;
  }
  return ret;
}
template<class left,class right>
inline auto operator + (const Lattice<left> &lhs,const right &rhs) -> Lattice<decltype(lhs._odata[0]+rhs)>
{
  Lattice<decltype(lhs._odata[0]+rhs)> ret(lhs._grid);
  parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
    decltype(lhs._odata[0]+rhs) tmp=lhs._odata[ss]+rhs; 
    vstream(ret._odata[ss],tmp);
    //	  ret._odata[ss]=lhs._odata[ss]+rhs;
  }
  return ret;
}
template<class left,class right>
inline auto operator - (const Lattice<left> &lhs,const right &rhs) -> Lattice<decltype(lhs._odata[0]-rhs)>
{
  Lattice<decltype(lhs._odata[0]-rhs)> ret(lhs._grid);
  parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
    decltype(lhs._odata[0]-rhs) tmp=lhs._odata[ss]-rhs;
    vstream(ret._odata[ss],tmp);
    //	ret._odata[ss]=lhs._odata[ss]-rhs;
  }
  return ret;
}
NAMESPACE_END(Grid);
#endif