xref: /aosp_15_r20/external/eigen/test/bicgstab.cpp (revision bf2c37156dfe67e5dfebd6d394bad8b2ab5804d4)

// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2011 Gael Guennebaud <[email protected]>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

#include "sparse_solver.h"
#include <Eigen/IterativeLinearSolvers>

template<typename T, typename I_> void test_bicgstab_T()
{
  BiCGSTAB<SparseMatrix<T,0,I_>, DiagonalPreconditioner<T> >     bicgstab_colmajor_diag;
  BiCGSTAB<SparseMatrix<T,0,I_>, IdentityPreconditioner    >     bicgstab_colmajor_I;
  BiCGSTAB<SparseMatrix<T,0,I_>, IncompleteLUT<T,I_> >              bicgstab_colmajor_ilut;
  //BiCGSTAB<SparseMatrix<T>, SSORPreconditioner<T> >     bicgstab_colmajor_ssor;

  bicgstab_colmajor_diag.setTolerance(NumTraits<T>::epsilon()*4);
  bicgstab_colmajor_ilut.setTolerance(NumTraits<T>::epsilon()*4);

  CALL_SUBTEST( check_sparse_square_solving(bicgstab_colmajor_diag)  );
//   CALL_SUBTEST( check_sparse_square_solving(bicgstab_colmajor_I)     );
  CALL_SUBTEST( check_sparse_square_solving(bicgstab_colmajor_ilut)     );
  //CALL_SUBTEST( check_sparse_square_solving(bicgstab_colmajor_ssor)     );
}

EIGEN_DECLARE_TEST(bicgstab)
{
  CALL_SUBTEST_1((test_bicgstab_T<double,int>()) );
  CALL_SUBTEST_2((test_bicgstab_T<std::complex<double>, int>()));
  CALL_SUBTEST_3((test_bicgstab_T<double,long int>()));
}