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Must obtain and access lattice indexing through a view object that is safe to copy construct in copy to GPU (without copying the lattice).
70 lines
2.5 KiB
C++
70 lines
2.5 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./lib/lattice/Lattice_trace.h
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Copyright (C) 2015
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Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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/* END LEGAL */
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#ifndef GRID_LATTICE_TRACE_H
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#define GRID_LATTICE_TRACE_H
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///////////////////////////////////////////////
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// Tracing, transposing, peeking, poking
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///////////////////////////////////////////////
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NAMESPACE_BEGIN(Grid);
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Trace
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class vobj>
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inline auto trace(const Lattice<vobj> &lhs) -> Lattice<decltype(trace(vobj()))>
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{
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Lattice<decltype(trace(vobj()))> ret(lhs.Grid());
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auto ret_v = ret.View();
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auto lhs_v = lhs.View();
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accelerator_loop( ss, lhs_v, {
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ret_v[ss] = trace(lhs_v[ss]);
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});
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return ret;
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Trace Index level dependent operation
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<int Index,class vobj>
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inline auto TraceIndex(const Lattice<vobj> &lhs) -> Lattice<decltype(traceIndex<Index>(vobj()))>
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{
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Lattice<decltype(traceIndex<Index>(vobj()))> ret(lhs.Grid());
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auto ret_v = ret.View();
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auto lhs_v = lhs.View();
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accelerator_loop( ss, lhs_v, {
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ret_v[ss] = traceIndex<Index>(lhs_v[ss]);
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});
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return ret;
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};
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NAMESPACE_END(Grid);
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#endif
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