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bug #632: implement general coefficient-wise "dense op sparse" operations through specialized evaluators instead of using SparseView.

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This permits to deal with arbitrary storage order, and to by-pass the more complex iterator of the sparse-sparse case.
This commit is contained in:
Gael Guennebaud
2016-01-30 14:39:50 +01:00
parent 699634890a
commit 8ed1553d20
2 changed files with 205 additions and 37 deletions
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23
Eigen/src/Core/util/XprHelper.h
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@@ -526,22 +526,21 @@ template <typename A> struct promote_storage_type<const A, A>
* the functor.
* The default rules are as follows:
* \code
* A op A -> A
* A op dense -> dense
* dense op B -> dense
* A * dense -> A
* dense * B -> B
* A op A -> A
* A op dense -> dense
* dense op B -> dense
* sparse op dense -> sparse
* dense op sparse -> sparse
* \endcode
*/
template <typename A, typename B, typename Functor> struct cwise_promote_storage_type;
template <typename A, typename Functor> struct cwise_promote_storage_type<A,A,Functor> { typedef A ret; };
template <typename Functor> struct cwise_promote_storage_type<Dense,Dense,Functor> { typedef Dense ret; };
template <typename ScalarA, typename ScalarB> struct cwise_promote_storage_type<Dense,Dense,scalar_product_op<ScalarA,ScalarB> > { typedef Dense ret; };
template <typename A, typename Functor> struct cwise_promote_storage_type<A,Dense,Functor> { typedef Dense ret; };
template <typename B, typename Functor> struct cwise_promote_storage_type<Dense,B,Functor> { typedef Dense ret; };
template <typename A, typename ScalarA, typename ScalarB> struct cwise_promote_storage_type<A,Dense,scalar_product_op<ScalarA,ScalarB> > { typedef A ret; };
template <typename B, typename ScalarA, typename ScalarB> struct cwise_promote_storage_type<Dense,B,scalar_product_op<ScalarA,ScalarB> > { typedef B ret; };
template <typename A, typename Functor> struct cwise_promote_storage_type<A,A,Functor> { typedef A ret; };
template <typename Functor> struct cwise_promote_storage_type<Dense,Dense,Functor> { typedef Dense ret; };
template <typename A, typename Functor> struct cwise_promote_storage_type<A,Dense,Functor> { typedef Dense ret; };
template <typename B, typename Functor> struct cwise_promote_storage_type<Dense,B,Functor> { typedef Dense ret; };
template <typename Functor> struct cwise_promote_storage_type<Sparse,Dense,Functor> { typedef Sparse ret; };
template <typename Functor> struct cwise_promote_storage_type<Dense,Sparse,Functor> { typedef Sparse ret; };
/** \internal Specify the "storage kind" of multiplying an expression of kind A with kind B.
* The template parameter ProductTag permits to specialize the resulting storage kind wrt to