OpenFOAM-dev / data /src /OpenFOAM /matrices /LduMatrix /Preconditioners /DiagonalPreconditioner /DiagonalPreconditioner.C
| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / 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. | |
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| 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. | |
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| for more details. | |
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| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * 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]); | |
| } | |
| } | |
| // ************************************************************************* // | |