1 // This file is part of Eigen, a lightweight C++ template library 2 // for linear algebra. 3 // 4 // Copyright (C) 2012 Chen-Pang He <jdh8@ms63.hinet.net> 5 // 6 // This Source Code Form is subject to the terms of the Mozilla 7 // Public License v. 2.0. If a copy of the MPL was not distributed 8 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. 9 10 #ifndef EIGEN_GENERAL_RANK1UPDATE_H 11 #define EIGEN_GENERAL_RANK1UPDATE_H 12 13 namespace internal { 14 15 /* Optimized matrix += alpha * uv' */ 16 template<typename Scalar, typename Index, int StorageOrder, bool ConjLhs, bool ConjRhs> 17 struct general_rank1_update; 18 19 template<typename Scalar, typename Index, bool ConjLhs, bool ConjRhs> 20 struct general_rank1_update<Scalar,Index,ColMajor,ConjLhs,ConjRhs> 21 { 22 static void run(Index rows, Index cols, Scalar* mat, Index stride, const Scalar* u, const Scalar* v, Scalar alpha) 23 { 24 typedef Map<const Matrix<Scalar,Dynamic,1> > OtherMap; 25 typedef typename conj_expr_if<ConjLhs,OtherMap>::type ConjRhsType; 26 conj_if<ConjRhs> cj; 27 28 for (Index i=0; i<cols; ++i) 29 Map<Matrix<Scalar,Dynamic,1> >(mat+stride*i,rows) += alpha * cj(v[i]) * ConjRhsType(OtherMap(u,rows)); 30 } 31 }; 32 33 template<typename Scalar, typename Index, bool ConjLhs, bool ConjRhs> 34 struct general_rank1_update<Scalar,Index,RowMajor,ConjLhs,ConjRhs> 35 { 36 static void run(Index rows, Index cols, Scalar* mat, Index stride, const Scalar* u, const Scalar* v, Scalar alpha) 37 { 38 general_rank1_update<Scalar,Index,ColMajor,ConjRhs,ConjRhs>::run(rows,cols,mat,stride,u,v,alpha); 39 } 40 }; 41 42 } // end namespace internal 43 44 #endif // EIGEN_GENERAL_RANK1UPDATE_H 45