mirror of
https://gitlab.com/libeigen/eigen.git
synced 2024-12-21 07:19:46 +08:00
44 lines
1.6 KiB
C++
44 lines
1.6 KiB
C++
// 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)
|
|
{
|
|
internal::conj_if<ConjRhs> cj;
|
|
typedef Map<const Matrix<Scalar,Dynamic,1> > OtherMap;
|
|
typedef typename internal::conditional<ConjLhs,typename OtherMap::ConjugateReturnType,const OtherMap&>::type ConjRhsType;
|
|
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
|