diff options
Diffstat (limited to 'third_party/eigen3/Eigen/src/SparseLU/SparseLU_Memory.h')
| -rw-r--r-- | third_party/eigen3/Eigen/src/SparseLU/SparseLU_Memory.h | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/third_party/eigen3/Eigen/src/SparseLU/SparseLU_Memory.h b/third_party/eigen3/Eigen/src/SparseLU/SparseLU_Memory.h deleted file mode 100644 index 1ffa7d54e9..0000000000 --- a/third_party/eigen3/Eigen/src/SparseLU/SparseLU_Memory.h +++ /dev/null @@ -1,227 +0,0 @@ -// This file is part of Eigen, a lightweight C++ template library -// for linear algebra. -// -// Copyright (C) 2012 Désiré Nuentsa-Wakam <desire.nuentsa_wakam@inria.fr> -// -// 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/. - -/* - - * NOTE: This file is the modified version of [s,d,c,z]memory.c files in SuperLU - - * -- SuperLU routine (version 3.1) -- - * Univ. of California Berkeley, Xerox Palo Alto Research Center, - * and Lawrence Berkeley National Lab. - * August 1, 2008 - * - * Copyright (c) 1994 by Xerox Corporation. All rights reserved. - * - * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY - * EXPRESSED OR IMPLIED. ANY USE IS AT YOUR OWN RISK. - * - * Permission is hereby granted to use or copy this program for any - * purpose, provided the above notices are retained on all copies. - * Permission to modify the code and to distribute modified code is - * granted, provided the above notices are retained, and a notice that - * the code was modified is included with the above copyright notice. - */ - -#ifndef EIGEN_SPARSELU_MEMORY -#define EIGEN_SPARSELU_MEMORY - -namespace Eigen { -namespace internal { - -enum { LUNoMarker = 3 }; -enum {emptyIdxLU = -1}; -template<typename Index> -inline Index LUnumTempV(Index& m, Index& w, Index& t, Index& b) -{ - return (std::max)(m, (t+b)*w); -} - -template< typename Scalar, typename Index> -inline Index LUTempSpace(Index&m, Index& w) -{ - return (2*w + 4 + LUNoMarker) * m * sizeof(Index) + (w + 1) * m * sizeof(Scalar); -} - - - - -/** - * Expand the existing storage to accomodate more fill-ins - * \param vec Valid pointer to the vector to allocate or expand - * \param[in,out] length At input, contain the current length of the vector that is to be increased. At output, length of the newly allocated vector - * \param[in] nbElts Current number of elements in the factors - * \param keep_prev 1: use length and do not expand the vector; 0: compute new_len and expand - * \param[in,out] num_expansions Number of times the memory has been expanded - */ -template <typename Scalar, typename Index> -template <typename VectorType> -Index SparseLUImpl<Scalar,Index>::expand(VectorType& vec, Index& length, Index nbElts, Index keep_prev, Index& num_expansions) -{ - - float alpha = 1.5; // Ratio of the memory increase - Index new_len; // New size of the allocated memory - - if(num_expansions == 0 || keep_prev) - new_len = length ; // First time allocate requested - else - new_len = (std::max)(length+1,Index(alpha * length)); - - VectorType old_vec; // Temporary vector to hold the previous values - if (nbElts > 0 ) - old_vec = vec.segment(0,nbElts); - - //Allocate or expand the current vector -#ifdef EIGEN_EXCEPTIONS - try -#endif - { - vec.resize(new_len); - } -#ifdef EIGEN_EXCEPTIONS - catch(std::bad_alloc& ) -#else - if(!vec.size()) -#endif - { - if (!num_expansions) - { - // First time to allocate from LUMemInit() - // Let LUMemInit() deals with it. - return -1; - } - if (keep_prev) - { - // In this case, the memory length should not not be reduced - return new_len; - } - else - { - // Reduce the size and increase again - Index tries = 0; // Number of attempts - do - { - alpha = (alpha + 1)/2; - new_len = (std::max)(length+1,Index(alpha * length)); -#ifdef EIGEN_EXCEPTIONS - try -#endif - { - vec.resize(new_len); - } -#ifdef EIGEN_EXCEPTIONS - catch(std::bad_alloc& ) -#else - if (!vec.size()) -#endif - { - tries += 1; - if ( tries > 10) return new_len; - } - } while (!vec.size()); - } - } - //Copy the previous values to the newly allocated space - if (nbElts > 0) - vec.segment(0, nbElts) = old_vec; - - - length = new_len; - if(num_expansions) ++num_expansions; - return 0; -} - -/** - * \brief Allocate various working space for the numerical factorization phase. - * \param m number of rows of the input matrix - * \param n number of columns - * \param annz number of initial nonzeros in the matrix - * \param lwork if lwork=-1, this routine returns an estimated size of the required memory - * \param glu persistent data to facilitate multiple factors : will be deleted later ?? - * \param fillratio estimated ratio of fill in the factors - * \param panel_size Size of a panel - * \return an estimated size of the required memory if lwork = -1; otherwise, return the size of actually allocated memory when allocation failed, and 0 on success - * \note Unlike SuperLU, this routine does not support successive factorization with the same pattern and the same row permutation - */ -template <typename Scalar, typename Index> -Index SparseLUImpl<Scalar,Index>::memInit(Index m, Index n, Index annz, Index lwork, Index fillratio, Index panel_size, GlobalLU_t& glu) -{ - Index& num_expansions = glu.num_expansions; //No memory expansions so far - num_expansions = 0; - glu.nzumax = glu.nzlumax = (std::min)(fillratio * annz / n, m) * n; // estimated number of nonzeros in U - glu.nzlmax = (std::max)(Index(4), fillratio) * annz / 4; // estimated nnz in L factor - // Return the estimated size to the user if necessary - Index tempSpace; - tempSpace = (2*panel_size + 4 + LUNoMarker) * m * sizeof(Index) + (panel_size + 1) * m * sizeof(Scalar); - if (lwork == emptyIdxLU) - { - Index estimated_size; - estimated_size = (5 * n + 5) * sizeof(Index) + tempSpace - + (glu.nzlmax + glu.nzumax) * sizeof(Index) + (glu.nzlumax+glu.nzumax) * sizeof(Scalar) + n; - return estimated_size; - } - - // Setup the required space - - // First allocate Integer pointers for L\U factors - glu.xsup.resize(n+1); - glu.supno.resize(n+1); - glu.xlsub.resize(n+1); - glu.xlusup.resize(n+1); - glu.xusub.resize(n+1); - - // Reserve memory for L/U factors - do - { - if( (expand<ScalarVector>(glu.lusup, glu.nzlumax, 0, 0, num_expansions)<0) - || (expand<ScalarVector>(glu.ucol, glu.nzumax, 0, 0, num_expansions)<0) - || (expand<IndexVector> (glu.lsub, glu.nzlmax, 0, 0, num_expansions)<0) - || (expand<IndexVector> (glu.usub, glu.nzumax, 0, 1, num_expansions)<0) ) - { - //Reduce the estimated size and retry - glu.nzlumax /= 2; - glu.nzumax /= 2; - glu.nzlmax /= 2; - if (glu.nzlumax < annz ) return glu.nzlumax; - } - } while (!glu.lusup.size() || !glu.ucol.size() || !glu.lsub.size() || !glu.usub.size()); - - ++num_expansions; - return 0; - -} // end LuMemInit - -/** - * \brief Expand the existing storage - * \param vec vector to expand - * \param[in,out] maxlen On input, previous size of vec (Number of elements to copy ). on output, new size - * \param nbElts current number of elements in the vector. - * \param memtype Type of the element to expand - * \param num_expansions Number of expansions - * \return 0 on success, > 0 size of the memory allocated so far - */ -template <typename Scalar, typename Index> -template <typename VectorType> -Index SparseLUImpl<Scalar,Index>::memXpand(VectorType& vec, Index& maxlen, Index nbElts, MemType memtype, Index& num_expansions) -{ - Index failed_size; - if (memtype == USUB) - failed_size = this->expand<VectorType>(vec, maxlen, nbElts, 1, num_expansions); - else - failed_size = this->expand<VectorType>(vec, maxlen, nbElts, 0, num_expansions); - - if (failed_size) - return failed_size; - - return 0 ; -} - -} // end namespace internal - -} // end namespace Eigen -#endif // EIGEN_SPARSELU_MEMORY |