[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_SELFADJOINT_PACKED_PRODUCT_H
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| 11 | #define EIGEN_SELFADJOINT_PACKED_PRODUCT_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 | * The matrix is in packed form.
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| 17 | */
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| 18 | template<typename Scalar, typename Index, int StorageOrder, int UpLo, bool ConjLhs, bool ConjRhs>
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| 19 | struct selfadjoint_packed_rank1_update;
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| 20 |
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| 21 | template<typename Scalar, typename Index, int UpLo, bool ConjLhs, bool ConjRhs>
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| 22 | struct selfadjoint_packed_rank1_update<Scalar,Index,ColMajor,UpLo,ConjLhs,ConjRhs>
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| 23 | {
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| 24 | typedef typename NumTraits<Scalar>::Real RealScalar;
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| 25 | static void run(Index size, Scalar* mat, const Scalar* vec, RealScalar alpha)
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| 26 | {
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| 27 | typedef Map<const Matrix<Scalar,Dynamic,1> > OtherMap;
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| 28 | typedef typename conj_expr_if<ConjLhs,OtherMap>::type ConjRhsType;
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| 29 | conj_if<ConjRhs> cj;
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| 30 |
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| 31 | for (Index i=0; i<size; ++i)
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| 32 | {
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| 33 | 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)));
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| 34 | //FIXME This should be handled outside.
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| 35 | mat[UpLo==Lower ? 0 : i] = numext::real(mat[UpLo==Lower ? 0 : i]);
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| 36 | mat += UpLo==Lower ? size-i : (i+1);
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| 37 | }
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| 38 | }
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| 39 | };
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| 40 |
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| 41 | template<typename Scalar, typename Index, int UpLo, bool ConjLhs, bool ConjRhs>
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| 42 | struct selfadjoint_packed_rank1_update<Scalar,Index,RowMajor,UpLo,ConjLhs,ConjRhs>
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| 43 | {
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| 44 | typedef typename NumTraits<Scalar>::Real RealScalar;
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| 45 | static void run(Index size, Scalar* mat, const Scalar* vec, RealScalar alpha)
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| 46 | {
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| 47 | selfadjoint_packed_rank1_update<Scalar,Index,ColMajor,UpLo==Lower?Upper:Lower,ConjRhs,ConjLhs>::run(size,mat,vec,alpha);
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| 48 | }
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| 49 | };
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| 50 |
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| 51 | } // end namespace internal
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| 52 |
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| 53 | #endif // EIGEN_SELFADJOINT_PACKED_PRODUCT_H
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