diff options
Diffstat (limited to 'Eigen/src/SparseCore/SparseProduct.h')
| -rw-r--r-- | Eigen/src/SparseCore/SparseProduct.h | 220 |
1 files changed, 65 insertions, 155 deletions
diff --git a/Eigen/src/SparseCore/SparseProduct.h b/Eigen/src/SparseCore/SparseProduct.h index cf7663070..c62386ed1 100644 --- a/Eigen/src/SparseCore/SparseProduct.h +++ b/Eigen/src/SparseCore/SparseProduct.h @@ -1,7 +1,7 @@ // This file is part of Eigen, a lightweight C++ template library // for linear algebra. // -// Copyright (C) 2008-2010 Gael Guennebaud <gael.guennebaud@inria.fr> +// Copyright (C) 2008-2014 Gael Guennebaud <gael.guennebaud@inria.fr> // // 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 @@ -12,158 +12,6 @@ namespace Eigen { -template<typename Lhs, typename Rhs> -struct SparseSparseProductReturnType -{ - typedef typename internal::traits<Lhs>::Scalar Scalar; - typedef typename internal::traits<Lhs>::Index Index; - enum { - LhsRowMajor = internal::traits<Lhs>::Flags & RowMajorBit, - RhsRowMajor = internal::traits<Rhs>::Flags & RowMajorBit, - TransposeRhs = (!LhsRowMajor) && RhsRowMajor, - TransposeLhs = LhsRowMajor && (!RhsRowMajor) - }; - - typedef typename internal::conditional<TransposeLhs, - SparseMatrix<Scalar,0,Index>, - typename internal::nested<Lhs,Rhs::RowsAtCompileTime>::type>::type LhsNested; - - typedef typename internal::conditional<TransposeRhs, - SparseMatrix<Scalar,0,Index>, - typename internal::nested<Rhs,Lhs::RowsAtCompileTime>::type>::type RhsNested; - - typedef SparseSparseProduct<LhsNested, RhsNested> Type; -}; - -namespace internal { -template<typename LhsNested, typename RhsNested> -struct traits<SparseSparseProduct<LhsNested, RhsNested> > -{ - typedef MatrixXpr XprKind; - // clean the nested types: - typedef typename remove_all<LhsNested>::type _LhsNested; - typedef typename remove_all<RhsNested>::type _RhsNested; - typedef typename _LhsNested::Scalar Scalar; - typedef typename promote_index_type<typename traits<_LhsNested>::Index, - typename traits<_RhsNested>::Index>::type Index; - - enum { - LhsCoeffReadCost = _LhsNested::CoeffReadCost, - RhsCoeffReadCost = _RhsNested::CoeffReadCost, - LhsFlags = _LhsNested::Flags, - RhsFlags = _RhsNested::Flags, - - RowsAtCompileTime = _LhsNested::RowsAtCompileTime, - ColsAtCompileTime = _RhsNested::ColsAtCompileTime, - MaxRowsAtCompileTime = _LhsNested::MaxRowsAtCompileTime, - MaxColsAtCompileTime = _RhsNested::MaxColsAtCompileTime, - - InnerSize = EIGEN_SIZE_MIN_PREFER_FIXED(_LhsNested::ColsAtCompileTime, _RhsNested::RowsAtCompileTime), - - EvalToRowMajor = (RhsFlags & LhsFlags & RowMajorBit), - - RemovedBits = ~(EvalToRowMajor ? 0 : RowMajorBit), - - Flags = (int(LhsFlags | RhsFlags) & HereditaryBits & RemovedBits) - | EvalBeforeAssigningBit - | EvalBeforeNestingBit, - - CoeffReadCost = Dynamic - }; - - typedef Sparse StorageKind; -}; - -} // end namespace internal - -template<typename LhsNested, typename RhsNested> -class SparseSparseProduct : internal::no_assignment_operator, - public SparseMatrixBase<SparseSparseProduct<LhsNested, RhsNested> > -{ - public: - - typedef SparseMatrixBase<SparseSparseProduct> Base; - EIGEN_DENSE_PUBLIC_INTERFACE(SparseSparseProduct) - - private: - - typedef typename internal::traits<SparseSparseProduct>::_LhsNested _LhsNested; - typedef typename internal::traits<SparseSparseProduct>::_RhsNested _RhsNested; - - public: - - template<typename Lhs, typename Rhs> - EIGEN_STRONG_INLINE SparseSparseProduct(const Lhs& lhs, const Rhs& rhs) - : m_lhs(lhs), m_rhs(rhs), m_tolerance(0), m_conservative(true) - { - init(); - } - - template<typename Lhs, typename Rhs> - EIGEN_STRONG_INLINE SparseSparseProduct(const Lhs& lhs, const Rhs& rhs, const RealScalar& tolerance) - : m_lhs(lhs), m_rhs(rhs), m_tolerance(tolerance), m_conservative(false) - { - init(); - } - - SparseSparseProduct pruned(const Scalar& reference = 0, const RealScalar& epsilon = NumTraits<RealScalar>::dummy_precision()) const - { - using std::abs; - return SparseSparseProduct(m_lhs,m_rhs,abs(reference)*epsilon); - } - - template<typename Dest> - void evalTo(Dest& result) const - { - if(m_conservative) - internal::conservative_sparse_sparse_product_selector<_LhsNested, _RhsNested, Dest>::run(lhs(),rhs(),result); - else - internal::sparse_sparse_product_with_pruning_selector<_LhsNested, _RhsNested, Dest>::run(lhs(),rhs(),result,m_tolerance); - } - - EIGEN_STRONG_INLINE Index rows() const { return m_lhs.rows(); } - EIGEN_STRONG_INLINE Index cols() const { return m_rhs.cols(); } - - EIGEN_STRONG_INLINE const _LhsNested& lhs() const { return m_lhs; } - EIGEN_STRONG_INLINE const _RhsNested& rhs() const { return m_rhs; } - - protected: - void init() - { - eigen_assert(m_lhs.cols() == m_rhs.rows()); - - enum { - ProductIsValid = _LhsNested::ColsAtCompileTime==Dynamic - || _RhsNested::RowsAtCompileTime==Dynamic - || int(_LhsNested::ColsAtCompileTime)==int(_RhsNested::RowsAtCompileTime), - AreVectors = _LhsNested::IsVectorAtCompileTime && _RhsNested::IsVectorAtCompileTime, - SameSizes = EIGEN_PREDICATE_SAME_MATRIX_SIZE(_LhsNested,_RhsNested) - }; - // note to the lost user: - // * for a dot product use: v1.dot(v2) - // * for a coeff-wise product use: v1.cwise()*v2 - EIGEN_STATIC_ASSERT(ProductIsValid || !(AreVectors && SameSizes), - INVALID_VECTOR_VECTOR_PRODUCT__IF_YOU_WANTED_A_DOT_OR_COEFF_WISE_PRODUCT_YOU_MUST_USE_THE_EXPLICIT_FUNCTIONS) - EIGEN_STATIC_ASSERT(ProductIsValid || !(SameSizes && !AreVectors), - INVALID_MATRIX_PRODUCT__IF_YOU_WANTED_A_COEFF_WISE_PRODUCT_YOU_MUST_USE_THE_EXPLICIT_FUNCTION) - EIGEN_STATIC_ASSERT(ProductIsValid || SameSizes, INVALID_MATRIX_PRODUCT) - } - - LhsNested m_lhs; - RhsNested m_rhs; - RealScalar m_tolerance; - bool m_conservative; -}; - -// sparse = sparse * sparse -template<typename Derived> -template<typename Lhs, typename Rhs> -inline Derived& SparseMatrixBase<Derived>::operator=(const SparseSparseProduct<Lhs,Rhs>& product) -{ - product.evalTo(derived()); - return derived(); -} - /** \returns an expression of the product of two sparse matrices. * By default a conservative product preserving the symbolic non zeros is performed. * The automatic pruning of the small values can be achieved by calling the pruned() function @@ -177,12 +25,74 @@ inline Derived& SparseMatrixBase<Derived>::operator=(const SparseSparseProduct<L * */ template<typename Derived> template<typename OtherDerived> -inline const typename SparseSparseProductReturnType<Derived,OtherDerived>::Type +inline const Product<Derived,OtherDerived> SparseMatrixBase<Derived>::operator*(const SparseMatrixBase<OtherDerived> &other) const { - return typename SparseSparseProductReturnType<Derived,OtherDerived>::Type(derived(), other.derived()); + return Product<Derived,OtherDerived>(derived(), other.derived()); } +namespace internal { + +// sparse * sparse +template<typename Lhs, typename Rhs, int ProductType> +struct generic_product_impl<Lhs, Rhs, SparseShape, SparseShape, ProductType> +{ + template<typename Dest> + static void evalTo(Dest& dst, const Lhs& lhs, const Rhs& rhs) + { + typedef typename nested_eval<Lhs,Dynamic>::type LhsNested; + typedef typename nested_eval<Rhs,Dynamic>::type RhsNested; + LhsNested lhsNested(lhs); + RhsNested rhsNested(rhs); + internal::conservative_sparse_sparse_product_selector<typename remove_all<LhsNested>::type, + typename remove_all<RhsNested>::type, Dest>::run(lhsNested,rhsNested,dst); + } +}; + +// sparse * sparse-triangular +template<typename Lhs, typename Rhs, int ProductType> +struct generic_product_impl<Lhs, Rhs, SparseShape, SparseTriangularShape, ProductType> + : public generic_product_impl<Lhs, Rhs, SparseShape, SparseShape, ProductType> +{}; + +// sparse-triangular * sparse +template<typename Lhs, typename Rhs, int ProductType> +struct generic_product_impl<Lhs, Rhs, SparseTriangularShape, SparseShape, ProductType> + : public generic_product_impl<Lhs, Rhs, SparseShape, SparseShape, ProductType> +{}; + +template<typename Lhs, typename Rhs, int Options> +struct evaluator<SparseView<Product<Lhs, Rhs, Options> > > + : public evaluator<typename Product<Lhs, Rhs, DefaultProduct>::PlainObject>::type +{ + typedef SparseView<Product<Lhs, Rhs, Options> > XprType; + typedef typename XprType::PlainObject PlainObject; + typedef typename evaluator<PlainObject>::type Base; + + typedef evaluator type; + typedef evaluator nestedType; + + explicit evaluator(const XprType& xpr) + : m_result(xpr.rows(), xpr.cols()) + { + using std::abs; + ::new (static_cast<Base*>(this)) Base(m_result); + typedef typename nested_eval<Lhs,Dynamic>::type LhsNested; + typedef typename nested_eval<Rhs,Dynamic>::type RhsNested; + LhsNested lhsNested(xpr.nestedExpression().lhs()); + RhsNested rhsNested(xpr.nestedExpression().rhs()); + + internal::sparse_sparse_product_with_pruning_selector<typename remove_all<LhsNested>::type, + typename remove_all<RhsNested>::type, PlainObject>::run(lhsNested,rhsNested,m_result, + abs(xpr.reference())*xpr.epsilon()); + } + +protected: + PlainObject m_result; +}; + +} // end namespace internal + } // end namespace Eigen #endif // EIGEN_SPARSEPRODUCT_H |