Nektar::Collections::BwdTrans_SumFac_Tri Class Reference

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

Inheritance diagram for Nektar::Collections::BwdTrans_SumFac_Tri:

Public Member Functions
	~BwdTrans_SumFac_Tri () final=default
void	operator() (const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output0, Array< OneD, NekDouble > &output1, Array< OneD, NekDouble > &output2, Array< OneD, NekDouble > &wsp) override
	Perform operation.
void	operator() (int dir, const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output, Array< OneD, NekDouble > &wsp) final
Public Member Functions inherited from Nektar::Collections::Operator
	Operator (std::vector< LocalRegions::ExpansionSharedPtr > pCollExp, std::shared_ptr< CoalescedGeomData > GeomData, StdRegions::FactorMap factors)
	Constructor.
virtual	~Operator ()=default
virtual COLLECTIONS_EXPORT void	UpdateFactors (StdRegions::FactorMap factors)
	Update the supplied factor map.
virtual COLLECTIONS_EXPORT void	UpdateVarcoeffs (StdRegions::VarCoeffMap &varcoeffs)
	Update the supplied variable coefficients.
unsigned int	GetWspSize ()
	Get the size of the required workspace.
unsigned int	GetNumElmt ()
	Get number of elements.
StdRegions::StdExpansionSharedPtr	GetExpSharedPtr ()
	Get expansion pointer.
unsigned int	GetInputSize (void)
unsigned int	GetOutputSize (void)
unsigned int	GetPhysSize (void)
unsigned int	GetCoeffSize (void)

Protected Attributes
const int	m_nquad0
const int	m_nquad1
const int	m_nmodes0
const int	m_nmodes1
Array< OneD, const NekDouble >	m_base0
Array< OneD, const NekDouble >	m_base1
bool	m_sortTopVertex
Protected Attributes inherited from Nektar::Collections::Operator
bool	m_isDeformed
StdRegions::StdExpansionSharedPtr	m_stdExp
unsigned int	m_numElmt
	number of elements that the operator is applied on
unsigned int	m_nqe
unsigned int	m_wspSize
unsigned int	m_inputSize
	number of modes or quadrature points that are passed as input to an operator
unsigned int	m_outputSize
	number of modes or quadrature points that are taken as output from an operator

Private Member Functions
	BwdTrans_SumFac_Tri (vector< LocalRegions::ExpansionSharedPtr > pCollExp, CoalescedGeomDataSharedPtr pGeomData, StdRegions::FactorMap factors)

Additional Inherited Members
Protected Member Functions inherited from Nektar::Collections::BwdTrans_Helper
	BwdTrans_Helper ()

Detailed Description

Backward transform operator using sum-factorisation (Tri)

Definition at line 575 of file BwdTrans.cpp.

Constructor & Destructor Documentation

~BwdTrans_SumFac_Tri()

Nektar::Collections::BwdTrans_SumFac_Tri::~BwdTrans_SumFac_Tri ( )

finaldefault

BwdTrans_SumFac_Tri()

Nektar::Collections::BwdTrans_SumFac_Tri::BwdTrans_SumFac_Tri ( vector< LocalRegions::ExpansionSharedPtr >  pCollExp, CoalescedGeomDataSharedPtr  pGeomData, StdRegions::FactorMap  factors  )

inlineprivate

Definition at line 638 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_base0(m_stdExp->GetBasis(0)->GetBdata()),
          m_base1(m_stdExp->GetBasis(1)->GetBdata())
    {
        m_wspSize = m_nquad1 * m_nmodes0 * m_numElmt;
        if (m_stdExp->GetBasis(0)->GetBasisType() == LibUtilities::eModified_A)
        {
            m_sortTopVertex = true;
        }
        else
        {
            m_sortTopVertex = false;
        }
    }

References Nektar::LibUtilities::eModified_A, m_nmodes0, m_nquad1, Nektar::Collections::Operator::m_numElmt, m_sortTopVertex, Nektar::Collections::Operator::m_stdExp, and Nektar::Collections::Operator::m_wspSize.

Member Function Documentation

operator()() [1/2]

void Nektar::Collections::BwdTrans_SumFac_Tri::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 583 of file BwdTrans.cpp.

    {
        ASSERTL1(wsp.size() == m_wspSize, "Incorrect workspace size");
 
        int ncoeffs = m_stdExp->GetNcoeffs();
        int i       = 0;
        int mode    = 0;
 
        for (i = mode = 0; i < m_nmodes0; ++i)
        {
            Blas::Dgemm('N', 'N', m_nquad1, m_numElmt, m_nmodes1 - i, 1.0,
                        m_base1.data() + mode * m_nquad1, m_nquad1,
                        &input[0] + mode, ncoeffs, 0.0,
                        &wsp[i * m_nquad1 * m_numElmt], m_nquad1);
            mode += m_nmodes1 - i;
        }
 
        // fix for modified basis by splitting top vertex mode
        if (m_sortTopVertex)
        {
            for (i = 0; i < m_numElmt; ++i)
            {
                Blas::Daxpy(m_nquad1, input[1 + i * ncoeffs],
                            m_base1.data() + m_nquad1, 1,
                            &wsp[m_nquad1 * m_numElmt] + i * m_nquad1, 1);
            }
        }
 
        Blas::Dgemm('N', 'T', m_nquad0, m_nquad1 * m_numElmt, m_nmodes0, 1.0,
                    m_base0.data(), m_nquad0, &wsp[0], m_nquad1 * m_numElmt,
                    0.0, &output0[0], m_nquad0);
    }

References ASSERTL1, Blas::Daxpy(), Blas::Dgemm(), m_base0, m_base1, m_nmodes0, m_nmodes1, m_nquad0, m_nquad1, Nektar::Collections::Operator::m_numElmt, m_sortTopVertex, Nektar::Collections::Operator::m_stdExp, and Nektar::Collections::Operator::m_wspSize.

operator()() [2/2]

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

inlinefinalvirtual

Implements Nektar::Collections::Operator.

Definition at line 620 of file BwdTrans.cpp.

    {
        ASSERTL0(false, "Not valid for this operator.");
    }

References ASSERTL0.

Member Data Documentation

m_base0

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

protected

Definition at line 633 of file BwdTrans.cpp.

Referenced by operator()().

m_base1

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

protected

Definition at line 634 of file BwdTrans.cpp.

Referenced by operator()().

m_nmodes0

const int Nektar::Collections::BwdTrans_SumFac_Tri::m_nmodes0

protected

Definition at line 631 of file BwdTrans.cpp.

Referenced by BwdTrans_SumFac_Tri(), and operator()().

m_nmodes1

const int Nektar::Collections::BwdTrans_SumFac_Tri::m_nmodes1

protected

Definition at line 632 of file BwdTrans.cpp.

Referenced by operator()().

m_nquad0

const int Nektar::Collections::BwdTrans_SumFac_Tri::m_nquad0

protected

Definition at line 629 of file BwdTrans.cpp.

Referenced by operator()().

m_nquad1

const int Nektar::Collections::BwdTrans_SumFac_Tri::m_nquad1

protected

Definition at line 630 of file BwdTrans.cpp.

Referenced by BwdTrans_SumFac_Tri(), and operator()().

m_sortTopVertex

bool Nektar::Collections::BwdTrans_SumFac_Tri::m_sortTopVertex

protected

Definition at line 635 of file BwdTrans.cpp.

Referenced by BwdTrans_SumFac_Tri(), and operator()().