mirror of
https://github.com/holub/mame
synced 2025-10-04 08:28:39 +03:00
60379b658a
- Separate code out into pmath.h and pstonum.h. - Fix VC build error - optimize pfmtlog.h a bit
140 lines
3.5 KiB
C++
140 lines
3.5 KiB
C++
// license:GPL-2.0+
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// copyright-holders:Couriersud
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/*
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* nld_ms_gmres.h
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*
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*/
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#ifndef NLD_MS_GMRES_H_
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#define NLD_MS_GMRES_H_
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#include "nld_ms_direct.h"
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#include "nld_solver.h"
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#include "plib/gmres.h"
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#include "plib/mat_cr.h"
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#include "plib/parray.h"
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#include "plib/vector_ops.h"
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#include <algorithm>
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namespace netlist
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{
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namespace solver
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{
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template <typename FT, int SIZE>
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class matrix_solver_GMRES_t: public matrix_solver_direct_t<FT, SIZE>
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{
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public:
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using float_type = FT;
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/* Sort rows in ascending order. This should minimize fill-in and thus
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* maximize the efficiency of the incomplete LUT.
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* This is already preconditioning.
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*/
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matrix_solver_GMRES_t(netlist_state_t &anetlist, const pstring &name,
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analog_net_t::list_t &nets,
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const solver_parameters_t *params,
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const std::size_t size)
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: matrix_solver_direct_t<FT, SIZE>(anetlist, name, nets, params, size)
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, m_ops(size, 0)
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, m_gmres(size)
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{
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const std::size_t iN = this->size();
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std::vector<std::vector<unsigned>> fill(iN);
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for (std::size_t k=0; k<iN; k++)
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{
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fill[k].resize(iN, decltype(m_ops.m_mat)::FILL_INFINITY);
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terms_for_net_t & row = this->m_terms[k];
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for (const auto &nz_j : row.m_nz)
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{
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fill[k][static_cast<mattype>(nz_j)] = 0;
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}
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}
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m_ops.build(fill);
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this->log_fill(fill, m_ops.m_mat);
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/* build pointers into the compressed row format matrix for each terminal */
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for (std::size_t k=0; k<iN; k++)
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{
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std::size_t cnt = 0;
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for (std::size_t j=0; j< this->m_terms[k].railstart();j++)
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{
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for (std::size_t i = m_ops.m_mat.row_idx[k]; i<m_ops.m_mat.row_idx[k+1]; i++)
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if (this->m_terms[k].m_connected_net_idx[j] == static_cast<int>(m_ops.m_mat.col_idx[i]))
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{
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this->m_mat_ptr[k][j] = &m_ops.m_mat.A[i];
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cnt++;
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break;
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}
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}
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nl_assert(cnt == this->m_terms[k].railstart());
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this->m_mat_ptr[k][this->m_terms[k].railstart()] = &m_ops.m_mat.A[m_ops.m_mat.diag[k]];
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}
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}
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unsigned vsolve_non_dynamic(const bool newton_raphson) override;
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private:
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using mattype = typename plib::pmatrix_cr_t<FT, SIZE>::index_type;
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//plib::mat_precondition_none<FT, SIZE> m_ops;
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plib::mat_precondition_ILU<FT, SIZE> m_ops;
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//plib::mat_precondition_diag<FT, SIZE> m_ops;
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plib::gmres_t<FT, SIZE> m_gmres;
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};
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// ----------------------------------------------------------------------------------------
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// matrix_solver - GMRES
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// ----------------------------------------------------------------------------------------
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template <typename FT, int SIZE>
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unsigned matrix_solver_GMRES_t<FT, SIZE>::vsolve_non_dynamic(const bool newton_raphson)
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{
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const std::size_t iN = this->size();
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m_ops.m_mat.set_scalar(plib::constants<FT>::zero());
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/* populate matrix and V for first estimate */
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this->fill_matrix_and_rhs();
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for (std::size_t k = 0; k < iN; k++)
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{
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this->m_new_V[k] = this->m_terms[k].template getV<float_type>();
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}
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const float_type accuracy = static_cast<float_type>(this->m_params.m_accuracy);
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auto iter = std::max(plib::constants<std::size_t>::one(), this->m_params.m_gs_loops());
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auto gsl = m_gmres.solve(m_ops, this->m_new_V, this->m_RHS, iter, accuracy);
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this->m_iterative_total += gsl;
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this->m_stat_calculations++;
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if (gsl > iter)
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{
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this->m_iterative_fail++;
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return matrix_solver_direct_t<FT, SIZE>::vsolve_non_dynamic(newton_raphson);
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}
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bool err(false);
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if (newton_raphson)
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err = this->check_err();
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this->store();
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return (err) ? 2 : 1;
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}
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} // namespace solver
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} // namespace netlist
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#endif /* NLD_MS_GMRES_H_ */
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