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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 STORMEIGEN_GENERAL_RANK1UPDATE_H
#define STORMEIGEN_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 // STORMEIGEN_GENERAL_RANK1UPDATE_H
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