diff options
author | Chen-Pang He <jdh8@ms63.hinet.net> | 2012-09-09 02:55:10 +0800 |
---|---|---|
committer | Chen-Pang He <jdh8@ms63.hinet.net> | 2012-09-09 02:55:10 +0800 |
commit | 669db3d7768b3b94d31d6552a1012ee29f54b8d8 (patch) | |
tree | f974fb8d085873b74363264deaef3639aa2bf690 /blas/PackedSelfadjointProduct.h | |
parent | 1b8f4164082f82265f8118d89de71bb14d7f0eb6 (diff) |
Extend rank-1 updates for different storage orders.
Diffstat (limited to 'blas/PackedSelfadjointProduct.h')
-rw-r--r-- | blas/PackedSelfadjointProduct.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/blas/PackedSelfadjointProduct.h b/blas/PackedSelfadjointProduct.h new file mode 100644 index 000000000..adc86ece1 --- /dev/null +++ b/blas/PackedSelfadjointProduct.h @@ -0,0 +1,59 @@ +// 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_SELFADJOINT_PACKED_PRODUCT_H +#define EIGEN_SELFADJOINT_PACKED_PRODUCT_H + +namespace internal { + +/* Optimized matrix += alpha * uv' + * The matrix is in packed form. + * + * FIXME I always fail tests for complex self-adjoint matrices. + * + ******* FATAL ERROR - PARAMETER NUMBER 6 WAS CHANGED INCORRECTLY ******* + ******* xHPR FAILED ON CALL NUMBER: + 2: xHPR ('U', 1, 0.0, X, 1, AP) + */ +template<typename Scalar, typename Index, int StorageOrder, int UpLo, bool ConjLhs, bool ConjRhs> +struct selfadjoint_packed_rank1_update; + +template<typename Scalar, typename Index, int UpLo, bool ConjLhs, bool ConjRhs> +struct selfadjoint_packed_rank1_update<Scalar,Index,ColMajor,UpLo,ConjLhs,ConjRhs> +{ + static void run(Index size, Scalar* mat, const Scalar* vec, 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; + Index offset = 0; + + for (Index i=0; i<size; ++i) + { + Map<Matrix<Scalar,Dynamic,1> >(mat+offset, UpLo==Lower ? size-i : (i+1)) + += alpha * cj(vec[i]) * ConjRhsType(OtherMap(vec+(UpLo==Lower ? i : 0), UpLo==Lower ? size-i : (i+1))); + //FIXME This should be handled outside. + mat[offset+(UpLo==Lower ? 0 : i)] = real(mat[offset+(UpLo==Lower ? 0 : i)]); + offset += UpLo==Lower ? size-i : (i+1); + } + } +}; + +template<typename Scalar, typename Index, int UpLo, bool ConjLhs, bool ConjRhs> +struct selfadjoint_packed_rank1_update<Scalar,Index,RowMajor,UpLo,ConjLhs,ConjRhs> +{ + static void run(Index size, Scalar* mat, const Scalar* vec, Scalar alpha) + { + selfadjoint_packed_rank1_update<Scalar,Index,ColMajor,UpLo==Lower?Upper:Lower,ConjRhs,ConjLhs>::run(size,mat,vec,alpha); + } +}; + +} // end namespace internal + +#endif // EIGEN_SELFADJOINT_PACKED_PRODUCT_H |