Lattice_transpose.h

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/*************************************************************************************
 
    Grid physics library, www.github.com/paboyle/Grid 
 
    Source file: ./lib/lattice/Lattice_transpose.h
 
    Copyright (C) 2015
 
Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
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_TRANSPOSE_H
#define GRID_LATTICE_TRANSPOSE_H

// Transpose
 
NAMESPACE_BEGIN(Grid);

// Transpose
/*
template<class vobj>
inline Lattice<vobj> transpose(const Lattice<vobj> &lhs){
  Lattice<vobj> ret(lhs.Grid());
  autoView( ret_v, ret, AcceleratorWrite);
  autoView( lhs_v, lhs, AcceleratorRead);
  accelerator_for(ss,lhs_v.size(),vobj::Nsimd(),{
    coalescedWrite(ret_v[ss], transpose(lhs_v(ss)));
  });
  return ret;
};
*/    

// Index level dependent transpose
template<int Index,class vobj>
inline auto TransposeIndex(const Lattice<vobj> &lhs) -> Lattice<decltype(transposeIndex<Index>(vobj()))>
{
  Lattice<decltype(transposeIndex<Index>(vobj()))> ret(lhs.Grid());
  autoView( ret_v, ret, AcceleratorWrite);
  autoView( lhs_v, lhs, AcceleratorRead);
  accelerator_for(ss,lhs_v.size(),vobj::Nsimd(),{
    coalescedWrite(ret_v[ss] , transposeIndex<Index>(lhs_v(ss)));
  });
  return ret;
};
 
NAMESPACE_END(Grid);
#endif