Nektar::Collections::BwdTrans_SumFac_Quad Class Reference

Backward transform operator using sum-factorisation (Quad) More...

Inheritance diagram for Nektar::Collections::BwdTrans_SumFac_Quad:

Public Member Functions
	~BwdTrans_SumFac_Quad () final
void	operator() (const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output, Array< OneD, NekDouble > &output1, Array< OneD, NekDouble > &output2, Array< OneD, NekDouble > &wsp) override
	Perform operation. More...
void	operator() (int dir, const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output, Array< OneD, NekDouble > &wsp) override final
virtual void	CheckFactors (StdRegions::FactorMap factors, int coll_phys_offset) override
	Check the validity of the supplied factor map. More...
Public Member Functions inherited from Nektar::Collections::Operator
	Operator (std::vector< StdRegions::StdExpansionSharedPtr > pCollExp, std::shared_ptr< CoalescedGeomData > GeomData, StdRegions::FactorMap factors)
	Constructor. More...
virtual COLLECTIONS_EXPORT	~Operator ()
unsigned int	GetWspSize ()
	Get the size of the required workspace. More...
unsigned int	GetNumElmt ()
	Get expansion pointer. More...
StdRegions::StdExpansionSharedPtr	GetExpSharedPtr ()
	Get expansion pointer. More...

Protected Attributes
const int	m_nquad0
const int	m_nquad1
const int	m_nmodes0
const int	m_nmodes1
const bool	m_colldir0
const bool	m_colldir1
Array< OneD, const NekDouble >	m_base0
Array< OneD, const NekDouble >	m_base1
Protected Attributes inherited from Nektar::Collections::Operator
bool	m_isDeformed
StdRegions::StdExpansionSharedPtr	m_stdExp
unsigned int	m_numElmt
unsigned int	m_nqe
unsigned int	m_wspSize

Private Member Functions
	BwdTrans_SumFac_Quad (vector< StdRegions::StdExpansionSharedPtr > pCollExp, CoalescedGeomDataSharedPtr pGeomData, StdRegions::FactorMap factors)

Detailed Description

Backward transform operator using sum-factorisation (Quad)

Definition at line 512 of file BwdTrans.cpp.

Constructor & Destructor Documentation

~BwdTrans_SumFac_Quad()

Nektar::Collections::BwdTrans_SumFac_Quad::~BwdTrans_SumFac_Quad ( )

inlinefinal

Definition at line 517 of file BwdTrans.cpp.

    {
    }

BwdTrans_SumFac_Quad()

Nektar::Collections::BwdTrans_SumFac_Quad::BwdTrans_SumFac_Quad ( vector< StdRegions::StdExpansionSharedPtr >  pCollExp, CoalescedGeomDataSharedPtr  pGeomData, StdRegions::FactorMap  factors  )

inlineprivate

Definition at line 600 of file BwdTrans.cpp.

        : Operator(pCollExp, pGeomData, factors),
          m_nquad0(m_stdExp->GetNumPoints(0)),
          m_nquad1(m_stdExp->GetNumPoints(1)),
          m_nmodes0(m_stdExp->GetBasisNumModes(0)),
          m_nmodes1(m_stdExp->GetBasisNumModes(1)),
          m_colldir0(m_stdExp->GetBasis(0)->Collocation()),
          m_colldir1(m_stdExp->GetBasis(1)->Collocation()),
          m_base0(m_stdExp->GetBasis(0)->GetBdata()),
          m_base1(m_stdExp->GetBasis(1)->GetBdata())
    {
        m_wspSize = m_nquad0 * m_nmodes1 * m_numElmt;
    }

Member Function Documentation

CheckFactors()

virtual void Nektar::Collections::BwdTrans_SumFac_Quad::CheckFactors ( StdRegions::FactorMap  factors, int  coll_phys_offset  )

inlineoverridevirtual

Check the validity of the supplied factor map.

Implements Nektar::Collections::Operator.

Definition at line 582 of file BwdTrans.cpp.

    {
        boost::ignore_unused(factors, coll_phys_offset);
        ASSERTL0(false, "Not valid for this operator.");
    }

References ASSERTL0.

operator()() [1/2]

void Nektar::Collections::BwdTrans_SumFac_Quad::operator() ( const Array< OneD, const NekDouble > &  input, Array< OneD, NekDouble > &  output0, Array< OneD, NekDouble > &  output1, Array< OneD, NekDouble > &  output2, Array< OneD, NekDouble > &  wsp  )

inlineoverridevirtual

Perform operation.

Implements Nektar::Collections::Operator.

Definition at line 521 of file BwdTrans.cpp.

    {
        boost::ignore_unused(output1, output2);
 
        int i = 0;
        if (m_colldir0 && m_colldir1)
        {
            Vmath::Vcopy(m_numElmt * m_nmodes0 * m_nmodes1, input.get(), 1,
                         output.get(), 1);
        }
        else if (m_colldir0)
        {
            Array<OneD, const NekDouble> base1 =
                m_stdExp->GetBasis(1)->GetBdata();
 
            for (i = 0; i < m_numElmt; ++i)
            {
                Blas::Dgemm('N', 'T', m_nquad0, m_nquad1, m_nmodes1, 1.0,
                            &input[i * m_nquad0 * m_nmodes1], m_nquad0,
                            base1.get(), m_nquad1, 0.0,
                            &output[i * m_nquad0 * m_nquad1], m_nquad0);
            }
        }
        else if (m_colldir1)
        {
            Blas::Dgemm('N', 'N', m_nquad0, m_nmodes1 * m_numElmt, m_nmodes0,
                        1.0, m_base0.get(), m_nquad0, &input[0], m_nmodes0, 0.0,
                        &output[0], m_nquad0);
        }
        else
        {
            ASSERTL1(wsp.size() == m_wspSize, "Incorrect workspace size");
 
            // Those two calls correpsond to the operation
            // out = B0*in*Transpose(B1);
            Blas::Dgemm('N', 'N', m_nquad0, m_nmodes1 * m_numElmt, m_nmodes0,
                        1.0, m_base0.get(), m_nquad0, &input[0], m_nmodes0, 0.0,
                        &wsp[0], m_nquad0);
 
            for (i = 0; i < m_numElmt; ++i)
            {
                Blas::Dgemm('N', 'T', m_nquad0, m_nquad1, m_nmodes1, 1.0,
                            &wsp[i * m_nquad0 * m_nmodes1], m_nquad0,
                            m_base1.get(), m_nquad1, 0.0,
                            &output[i * m_nquad0 * m_nquad1], m_nquad0);
            }
        }
    }

References ASSERTL1, Blas::Dgemm(), and Vmath::Vcopy().

operator()() [2/2]

void Nektar::Collections::BwdTrans_SumFac_Quad::operator() ( int  dir, const Array< OneD, const NekDouble > &  input, Array< OneD, NekDouble > &  output, Array< OneD, NekDouble > &  wsp  )

inlinefinaloverridevirtual

Implements Nektar::Collections::Operator.

Definition at line 574 of file BwdTrans.cpp.

    {
        boost::ignore_unused(dir, input, output, wsp);
        ASSERTL0(false, "Not valid for this operator.");
    }

References ASSERTL0.

Member Data Documentation

m_base0

Array<OneD, const NekDouble> Nektar::Collections::BwdTrans_SumFac_Quad::m_base0

protected

Definition at line 596 of file BwdTrans.cpp.

m_base1

Array<OneD, const NekDouble> Nektar::Collections::BwdTrans_SumFac_Quad::m_base1

protected

Definition at line 597 of file BwdTrans.cpp.

m_colldir0

const bool Nektar::Collections::BwdTrans_SumFac_Quad::m_colldir0

protected

Definition at line 594 of file BwdTrans.cpp.

m_colldir1

const bool Nektar::Collections::BwdTrans_SumFac_Quad::m_colldir1

protected

Definition at line 595 of file BwdTrans.cpp.

m_nmodes0

const int Nektar::Collections::BwdTrans_SumFac_Quad::m_nmodes0

protected

Definition at line 592 of file BwdTrans.cpp.

m_nmodes1

const int Nektar::Collections::BwdTrans_SumFac_Quad::m_nmodes1

protected

Definition at line 593 of file BwdTrans.cpp.

m_nquad0

const int Nektar::Collections::BwdTrans_SumFac_Quad::m_nquad0

protected

Definition at line 590 of file BwdTrans.cpp.

m_nquad1

const int Nektar::Collections::BwdTrans_SumFac_Quad::m_nquad1

protected

Definition at line 591 of file BwdTrans.cpp.