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Thyra_TpetraEuclideanScalarProd_def.hpp
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41 
42 #ifndef THYRA_TPETRA_EUCLIDEAN_SCALAR_PROD_DEF_HPP
43 #define THYRA_TPETRA_EUCLIDEAN_SCALAR_PROD_DEF_HPP
44 
45 #include "Thyra_TpetraEuclideanScalarProd_decl.hpp"
46 #include "Thyra_TpetraMultiVector.hpp"
47 #include "Thyra_TpetraVector.hpp"
48 
49 
50 namespace Thyra {
51 
52 
53 template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
55  const MultiVectorBase<Scalar>& X,
56  const MultiVectorBase<Scalar>& Y,
57  const ArrayView<Scalar>& scalarProds_out
58  ) const
59 {
60  typedef Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> TMV;
61  Teuchos::RCP<const TMV> X_tpetra = this->getConstTpetraMultiVector(Teuchos::rcpFromRef(X));
62  Teuchos::RCP<const TMV> Y_tpetra = this->getConstTpetraMultiVector(Teuchos::rcpFromRef(Y));
63 
64  if (nonnull(X_tpetra) && nonnull(Y_tpetra)) {
65  // Which one do we want transposed?
66  // Tpetra transposes the argument of dot.
67  // Below is the order from TpetraVectorSpace::scalarProdsImpl,
68  // so this would transpose Y. However, Thyra::dots (which calls
69  // the RTOp) transposes the first argument, so scalarProdsImpl
70  // in EuclideanScalarProd transposes X...
71  X_tpetra->dot(*Y_tpetra, scalarProds_out);
72  } else {
73  // If one of the casts succeeded, sync that MV to host space
74  if (nonnull(X_tpetra))
75  Teuchos::rcp_const_cast<TMV>(X_tpetra)->sync_host ();
76  if (nonnull(Y_tpetra))
77  Teuchos::rcp_const_cast<TMV>(Y_tpetra)->sync_host ();
78 
79  EuclideanScalarProd<Scalar>::scalarProdsImpl(X, Y, scalarProds_out);
80  }
81 }
82 
83 
84 template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
88 {
89  using Teuchos::rcp_dynamic_cast;
92 
93  RCP<const TMV> tmv = rcp_dynamic_cast<const TMV>(mv);
94  if (nonnull(tmv)) {
95  return tmv->getConstTpetraMultiVector();
96  }
97 
98  RCP<const TV> tv = rcp_dynamic_cast<const TV>(mv);
99  if (nonnull(tv)) {
100  return tv->getConstTpetraVector();
101  }
102 
103  return Teuchos::null;
104 }
105 
106 
107 } // end namespace Thyra
108 
109 
110 #endif // THYRA_EUCLIDEAN_SCALAR_PROD_DEF_HPP
Concrete implementation of Thyra::MultiVector in terms of Tpetra::MultiVector.
virtual void scalarProdsImpl(const MultiVectorBase< Scalar > &X, const MultiVectorBase< Scalar > &Y, const ArrayView< Scalar > &scalarProds) const
Simply calls dots(X,Y,scalar_prods).
Interface for a collection of column vectors called a multi-vector.
Concrete Thyra::SpmdVectorBase using Tpetra::Vector.
bool nonnull(const boost::shared_ptr< T > &p)
virtual void scalarProdsImpl(const MultiVectorBase< Scalar > &X, const MultiVectorBase< Scalar > &Y, const ArrayView< Scalar > &scalarProds) const
If X and Y are both Tpetra wrappers, computes the pair-wise scalar products directly with Tpetra call...
Extends concrete implementation of a Euclidean scalar product for specifically Tpetra vectors/multive...