17faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez// This file is part of Eigen, a lightweight C++ template library 27faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez// for linear algebra. 37faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez// 47faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez// Copyright (C) 2012 Chen-Pang He <jdh8@ms63.hinet.net> 57faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez// 67faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez// This Source Code Form is subject to the terms of the Mozilla 77faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez// Public License v. 2.0. If a copy of the MPL was not distributed 87faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez// with this file, You can obtain one at http://mozilla.org/MPL/2.0/. 97faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez 107faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez#ifndef EIGEN_SELFADJOINT_PACKED_PRODUCT_H 117faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez#define EIGEN_SELFADJOINT_PACKED_PRODUCT_H 127faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez 137faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandeznamespace internal { 147faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez 157faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez/* Optimized matrix += alpha * uv' 167faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez * The matrix is in packed form. 177faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez */ 187faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandeztemplate<typename Scalar, typename Index, int StorageOrder, int UpLo, bool ConjLhs, bool ConjRhs> 197faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandezstruct selfadjoint_packed_rank1_update; 207faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez 217faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandeztemplate<typename Scalar, typename Index, int UpLo, bool ConjLhs, bool ConjRhs> 227faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandezstruct selfadjoint_packed_rank1_update<Scalar,Index,ColMajor,UpLo,ConjLhs,ConjRhs> 237faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez{ 247faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez typedef typename NumTraits<Scalar>::Real RealScalar; 257faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez static void run(Index size, Scalar* mat, const Scalar* vec, RealScalar alpha) 267faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez { 277faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez typedef Map<const Matrix<Scalar,Dynamic,1> > OtherMap; 287faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez typedef typename conj_expr_if<ConjLhs,OtherMap>::type ConjRhsType; 297faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez conj_if<ConjRhs> cj; 307faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez 317faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez for (Index i=0; i<size; ++i) 327faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez { 337faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez Map<Matrix<Scalar,Dynamic,1> >(mat, UpLo==Lower ? size-i : (i+1)) += alpha * cj(vec[i]) * ConjRhsType(OtherMap(vec+(UpLo==Lower ? i : 0), UpLo==Lower ? size-i : (i+1))); 347faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez //FIXME This should be handled outside. 357faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez mat[UpLo==Lower ? 0 : i] = numext::real(mat[UpLo==Lower ? 0 : i]); 367faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez mat += UpLo==Lower ? size-i : (i+1); 377faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez } 387faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez } 397faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez}; 407faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez 417faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandeztemplate<typename Scalar, typename Index, int UpLo, bool ConjLhs, bool ConjRhs> 427faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandezstruct selfadjoint_packed_rank1_update<Scalar,Index,RowMajor,UpLo,ConjLhs,ConjRhs> 437faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez{ 447faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez typedef typename NumTraits<Scalar>::Real RealScalar; 457faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez static void run(Index size, Scalar* mat, const Scalar* vec, RealScalar alpha) 467faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez { 477faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez selfadjoint_packed_rank1_update<Scalar,Index,ColMajor,UpLo==Lower?Upper:Lower,ConjRhs,ConjLhs>::run(size,mat,vec,alpha); 487faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez } 497faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez}; 507faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez 517faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez} // end namespace internal 527faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez 537faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez#endif // EIGEN_SELFADJOINT_PACKED_PRODUCT_H 54