[136] | 1 | // This file is part of Eigen, a lightweight C++ template library
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| 2 | // for linear algebra.
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| 3 | //
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| 4 | // Copyright (C) 2012 Chen-Pang He <jdh8@ms63.hinet.net>
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| 5 | //
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| 6 | // This Source Code Form is subject to the terms of the Mozilla
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| 7 | // Public License v. 2.0. If a copy of the MPL was not distributed
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| 8 | // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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| 9 |
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| 10 | #ifndef EIGEN_GENERAL_RANK1UPDATE_H
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| 11 | #define EIGEN_GENERAL_RANK1UPDATE_H
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| 12 |
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| 13 | namespace internal {
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| 14 |
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| 15 | /* Optimized matrix += alpha * uv' */
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| 16 | template<typename Scalar, typename Index, int StorageOrder, bool ConjLhs, bool ConjRhs>
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| 17 | struct general_rank1_update;
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| 18 |
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| 19 | template<typename Scalar, typename Index, bool ConjLhs, bool ConjRhs>
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| 20 | struct general_rank1_update<Scalar,Index,ColMajor,ConjLhs,ConjRhs>
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| 21 | {
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| 22 | static void run(Index rows, Index cols, Scalar* mat, Index stride, const Scalar* u, const Scalar* v, Scalar alpha)
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| 23 | {
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| 24 | typedef Map<const Matrix<Scalar,Dynamic,1> > OtherMap;
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| 25 | typedef typename conj_expr_if<ConjLhs,OtherMap>::type ConjRhsType;
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| 26 | conj_if<ConjRhs> cj;
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| 27 |
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| 28 | for (Index i=0; i<cols; ++i)
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| 29 | Map<Matrix<Scalar,Dynamic,1> >(mat+stride*i,rows) += alpha * cj(v[i]) * ConjRhsType(OtherMap(u,rows));
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| 30 | }
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| 31 | };
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| 32 |
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| 33 | template<typename Scalar, typename Index, bool ConjLhs, bool ConjRhs>
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| 34 | struct general_rank1_update<Scalar,Index,RowMajor,ConjLhs,ConjRhs>
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| 35 | {
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| 36 | static void run(Index rows, Index cols, Scalar* mat, Index stride, const Scalar* u, const Scalar* v, Scalar alpha)
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| 37 | {
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| 38 | general_rank1_update<Scalar,Index,ColMajor,ConjRhs,ConjRhs>::run(rows,cols,mat,stride,u,v,alpha);
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| 39 | }
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| 40 | };
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| 41 |
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| 42 | } // end namespace internal
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| 43 |
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| 44 | #endif // EIGEN_GENERAL_RANK1UPDATE_H
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