1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | foam-extend: Open Source CFD
4 \\ / O peration | Version: 3.2
5 \\ / A nd | Web: http://www.foam-extend.org
6 \\/ M anipulation | For copyright notice see file Copyright
7 -------------------------------------------------------------------------------
9 This file is part of foam-extend.
11 foam-extend is free software: you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by the
13 Free Software Foundation, either version 3 of the License, or (at your
14 option) any later version.
16 foam-extend is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with foam-extend. If not, see <http://www.gnu.org/licenses/>.
24 \*---------------------------------------------------------------------------*/
26 #include "diagonalPreconditioner.H"
28 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
32 defineTypeNameAndDebug(diagonalPreconditioner, 0);
35 addsymMatrixConstructorToTable<diagonalPreconditioner>
36 adddiagonalPreconditionerSymMatrixConstructorToTable_;
39 addasymMatrixConstructorToTable<diagonalPreconditioner>
40 adddiagonalPreconditionerAsymMatrixConstructorToTable_;
44 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
46 Foam::diagonalPreconditioner::diagonalPreconditioner
48 const lduMatrix& matrix,
49 const FieldField<Field, scalar>& coupleBouCoeffs,
50 const FieldField<Field, scalar>& coupleIntCoeffs,
51 const lduInterfaceFieldPtrsList& interfaces,
62 rD(matrix.diag().size())
64 scalar* __restrict__ rDPtr = rD.begin();
65 const scalar* __restrict__ DPtr = matrix_.diag().begin();
67 register label nCells = rD.size();
69 // Generate reciprocal diagonal
70 for (register label cell=0; cell<nCells; cell++)
72 rDPtr[cell] = 1.0/DPtr[cell];
77 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
79 void Foam::diagonalPreconditioner::precondition
82 const scalarField& rA,
86 scalar* __restrict__ wAPtr = wA.begin();
87 const scalar* __restrict__ rAPtr = rA.begin();
88 const scalar* __restrict__ rDPtr = rD.begin();
90 register label nCells = wA.size();
92 for (register label cell=0; cell<nCells; cell++)
94 wAPtr[cell] = rDPtr[cell]*rAPtr[cell];
99 // ************************************************************************* //