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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2018 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM 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 3 of the License, or
(at your option) any later version.
OpenFOAM 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 OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
\*---------------------------------------------------------------------------*/
#include "DiagonalPreconditioner.H"
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
template<class Type, class DType, class LUType>
Foam::DiagonalPreconditioner<Type, DType, LUType>::DiagonalPreconditioner
(
const typename LduMatrix<Type, DType, LUType>::solver& sol,
const dictionary&
)
:
LduMatrix<Type, DType, LUType>::preconditioner(sol),
rD(sol.matrix().diag().size())
{
DType* __restrict__ rDPtr = rD.begin();
const DType* __restrict__ DPtr = this->solver_.matrix().diag().begin();
label nCells = rD.size();
// Generate inverse (reciprocal for scalar) diagonal
for (label cell=0; cell<nCells; cell++)
{
rDPtr[cell] = inv(DPtr[cell]);
}
}
// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
template<class Type, class DType, class LUType>
void Foam::DiagonalPreconditioner<Type, DType, LUType>::read(const dictionary&)
{}
template<class Type, class DType, class LUType>
void Foam::DiagonalPreconditioner<Type, DType, LUType>::precondition
(
Field<Type>& wA,
const Field<Type>& rA
) const
{
Type* __restrict__ wAPtr = wA.begin();
const Type* __restrict__ rAPtr = rA.begin();
const DType* __restrict__ rDPtr = rD.begin();
label nCells = wA.size();
for (label cell=0; cell<nCells; cell++)
{
wAPtr[cell] = dot(rDPtr[cell], rAPtr[cell]);
}
}
// ************************************************************************* //
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