FreeFOAM The Cross-Platform CFD Toolkit
diagonalPreconditioner.C
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25 
27 
28 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
29 
30 namespace Foam
31 {
32  defineTypeNameAndDebug(diagonalPreconditioner, 0);
33 
34  lduMatrix::preconditioner::
35  addsymMatrixConstructorToTable<diagonalPreconditioner>
37 
38  lduMatrix::preconditioner::
39  addasymMatrixConstructorToTable<diagonalPreconditioner>
41 }
42 
43 
44 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
45 
46 Foam::diagonalPreconditioner::diagonalPreconditioner
47 (
48  const lduMatrix::solver& sol,
49  const dictionary&
50 )
51 :
53  rD(sol.matrix().diag().size())
54 {
55  scalar* __restrict__ rDPtr = rD.begin();
56  const scalar* __restrict__ DPtr = solver_.matrix().diag().begin();
57 
58  register label nCells = rD.size();
59 
60  // Generate reciprocal diagonal
61  for (register label cell=0; cell<nCells; cell++)
62  {
63  rDPtr[cell] = 1.0/DPtr[cell];
64  }
65 }
66 
67 
68 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
69 
71 (
72  scalarField& wA,
73  const scalarField& rA,
74  const direction
75 ) const
76 {
77  scalar* __restrict__ wAPtr = wA.begin();
78  const scalar* __restrict__ rAPtr = rA.begin();
79  const scalar* __restrict__ rDPtr = rD.begin();
80 
81  register label nCells = wA.size();
82 
83  for (register label cell=0; cell<nCells; cell++)
84  {
85  wAPtr[cell] = rDPtr[cell]*rAPtr[cell];
86  }
87 }
88 
89 
90 // ************************ vim: set sw=4 sts=4 et: ************************ //