void Apply ( const Xpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>& x, Xpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>& y, ETrans trans=NOTRANS ) const {
TEUCHOS_TEST_FOR_EXCEPTION(trans!=NOTRANS, XpetraOpFailure,
"Belos::XpetraOp::Apply, transpose mode != NOTRANS not supported.");
//FIXME InitialGuessIsZero currently does nothing in MueLu::Hierarchy.Iterate().
y.putScalar(0.0);
Op_->apply(x,y);
}
void Apply(const Xpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>& x, Xpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>& y, ETrans trans = NOTRANS ) const {
TEUCHOS_TEST_FOR_EXCEPTION(trans != NOTRANS, MueLuOpFailure,
"Belos::MueLuOp::Apply, transpose mode != NOTRANS not supported by MueLu preconditionners.");
//FIXME InitialGuessIsZero currently does nothing in MueLu::Hierarchy.Iterate(), but it matters for AMGX
y.putScalar(0.0);
#ifdef HAVE_MUELU_AMGX
if (!AMGX_.is_null()) {
Tpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node> tX = Xpetra::toTpetra(x);
Tpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node> tY = Xpetra::toTpetra(y);
AMGX_->apply(tX, tY);
}
#endif
if (!Hierarchy_.is_null())
Hierarchy_->Iterate(x, y, 1, true);
}