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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