| Brian Silverman | 72890c2 | 2015-09-19 14:37:37 -0400 | [diff] [blame] | 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 |