xref: /aosp_15_r20/external/eigen/test/conjugate_gradient.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_conjugate_gradient_T()
{
  typedef SparseMatrix<T,0,I_> SparseMatrixType;
  ConjugateGradient<SparseMatrixType, Lower      > cg_colmajor_lower_diag;
  ConjugateGradient<SparseMatrixType, Upper      > cg_colmajor_upper_diag;
  ConjugateGradient<SparseMatrixType, Lower|Upper> cg_colmajor_loup_diag;
  ConjugateGradient<SparseMatrixType, Lower, IdentityPreconditioner> cg_colmajor_lower_I;
  ConjugateGradient<SparseMatrixType, Upper, IdentityPreconditioner> cg_colmajor_upper_I;

  CALL_SUBTEST( check_sparse_spd_solving(cg_colmajor_lower_diag)  );
  CALL_SUBTEST( check_sparse_spd_solving(cg_colmajor_upper_diag)  );
  CALL_SUBTEST( check_sparse_spd_solving(cg_colmajor_loup_diag)   );
  CALL_SUBTEST( check_sparse_spd_solving(cg_colmajor_lower_I)     );
  CALL_SUBTEST( check_sparse_spd_solving(cg_colmajor_upper_I)     );
}

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