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- // This file is part of Eigen, a lightweight C++ template library
- // for linear algebra.
- //
- // Copyright (C) 2012 Chen-Pang He <jdh8@ms63.hinet.net>
- //
- // 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/.
- #ifndef EIGEN_GENERAL_RANK1UPDATE_H
- #define EIGEN_GENERAL_RANK1UPDATE_H
- namespace internal {
- /* Optimized matrix += alpha * uv' */
- template<typename Scalar, typename Index, int StorageOrder, bool ConjLhs, bool ConjRhs>
- struct general_rank1_update;
- template<typename Scalar, typename Index, bool ConjLhs, bool ConjRhs>
- struct general_rank1_update<Scalar,Index,ColMajor,ConjLhs,ConjRhs>
- {
- static void run(Index rows, Index cols, Scalar* mat, Index stride, const Scalar* u, const Scalar* v, Scalar alpha)
- {
- typedef Map<const Matrix<Scalar,Dynamic,1> > OtherMap;
- typedef typename conj_expr_if<ConjLhs,OtherMap>::type ConjRhsType;
- conj_if<ConjRhs> cj;
- for (Index i=0; i<cols; ++i)
- Map<Matrix<Scalar,Dynamic,1> >(mat+stride*i,rows) += alpha * cj(v[i]) * ConjRhsType(OtherMap(u,rows));
- }
- };
- template<typename Scalar, typename Index, bool ConjLhs, bool ConjRhs>
- struct general_rank1_update<Scalar,Index,RowMajor,ConjLhs,ConjRhs>
- {
- static void run(Index rows, Index cols, Scalar* mat, Index stride, const Scalar* u, const Scalar* v, Scalar alpha)
- {
- general_rank1_update<Scalar,Index,ColMajor,ConjRhs,ConjRhs>::run(rows,cols,mat,stride,u,v,alpha);
- }
- };
- } // end namespace internal
- #endif // EIGEN_GENERAL_RANK1UPDATE_H
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