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* fix multiple temporary copies for coeff based products

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* introduce a lazy product version of the coefficient based implementation
  => flagged is not used anymore
  => small outer product are now lazy by default (aliasing is really unlikely for outer products)
This commit is contained in:
Gael Guennebaud
2010-02-09 11:05:39 +01:00
parent 0398e21198
commit 5686eca7b1
8 changed files with 75 additions and 49 deletions
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24
Eigen/src/Core/Product.h
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@@ -87,12 +87,12 @@ public:
template<int Rows, int Cols> struct ei_product_type_selector<Rows, Cols, 1> { enum { ret = OuterProduct }; };
template<int Depth> struct ei_product_type_selector<1, 1, Depth> { enum { ret = InnerProduct }; };
template<> struct ei_product_type_selector<1, 1, 1> { enum { ret = InnerProduct }; };
template<> struct ei_product_type_selector<Small,1, Small> { enum { ret = CoeffBasedProduct }; };
template<> struct ei_product_type_selector<1, Small,Small> { enum { ret = CoeffBasedProduct }; };
template<> struct ei_product_type_selector<Small,Small,Small> { enum { ret = CoeffBasedProduct }; };
template<> struct ei_product_type_selector<Small, Small, 1> { enum { ret = CoeffBasedProduct }; };
template<> struct ei_product_type_selector<Small, Large, 1> { enum { ret = CoeffBasedProduct }; };
template<> struct ei_product_type_selector<Large, Small, 1> { enum { ret = CoeffBasedProduct }; };
template<> struct ei_product_type_selector<Small,1, Small> { enum { ret = CoeffBasedProductMode }; };
template<> struct ei_product_type_selector<1, Small,Small> { enum { ret = CoeffBasedProductMode }; };
template<> struct ei_product_type_selector<Small,Small,Small> { enum { ret = CoeffBasedProductMode }; };
template<> struct ei_product_type_selector<Small, Small, 1> { enum { ret = LazyCoeffBasedProductMode }; };
template<> struct ei_product_type_selector<Small, Large, 1> { enum { ret = LazyCoeffBasedProductMode }; };
template<> struct ei_product_type_selector<Large, Small, 1> { enum { ret = LazyCoeffBasedProductMode }; };
template<> struct ei_product_type_selector<1, Large,Small> { enum { ret = GemvProduct }; };
template<> struct ei_product_type_selector<1, Large,Large> { enum { ret = GemvProduct }; };
template<> struct ei_product_type_selector<1, Small,Large> { enum { ret = GemvProduct }; };
@@ -134,11 +134,19 @@ struct ProductReturnType
};
template<typename Lhs, typename Rhs>
struct ProductReturnType<Lhs,Rhs,CoeffBasedProduct>
struct ProductReturnType<Lhs,Rhs,CoeffBasedProductMode>
{
typedef typename ei_nested<Lhs, Rhs::ColsAtCompileTime, typename ei_plain_matrix_type<Lhs>::type >::type LhsNested;
typedef typename ei_nested<Rhs, Lhs::RowsAtCompileTime, typename ei_plain_matrix_type<Rhs>::type >::type RhsNested;
typedef GeneralProduct<LhsNested, RhsNested, CoeffBasedProduct> Type;
typedef CoeffBasedProduct<LhsNested, RhsNested, EvalBeforeAssigningBit | EvalBeforeNestingBit> Type;
};
template<typename Lhs, typename Rhs>
struct ProductReturnType<Lhs,Rhs,LazyCoeffBasedProductMode>
{
typedef typename ei_nested<Lhs, Rhs::ColsAtCompileTime, typename ei_plain_matrix_type<Lhs>::type >::type LhsNested;
typedef typename ei_nested<Rhs, Lhs::RowsAtCompileTime, typename ei_plain_matrix_type<Rhs>::type >::type RhsNested;
typedef CoeffBasedProduct<LhsNested, RhsNested, 0> Type;
};