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

Inheritance diagram for Nektar::Collections::BwdTrans_SumFac_Hex:

Public Member Functions
	~BwdTrans_SumFac_Hex () 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. More...

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< StdRegions::StdExpansionSharedPtr > pCollExp, std::shared_ptr< CoalescedGeomData > GeomData, StdRegions::FactorMap factors)
	Constructor. More...

virtual	~Operator ()=default

virtual COLLECTIONS_EXPORT void	operator() (const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output0, Array< OneD, NekDouble > &output1, Array< OneD, NekDouble > &output2, Array< OneD, NekDouble > &wsp=NullNekDouble1DArray)=0
	Perform operation. More...

virtual COLLECTIONS_EXPORT void	operator() (int dir, const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output, Array< OneD, NekDouble > &wsp=NullNekDouble1DArray)=0

virtual COLLECTIONS_EXPORT void	UpdateFactors (StdRegions::FactorMap factors)
	Update the supplied factor map. More...

virtual COLLECTIONS_EXPORT void	UpdateVarcoeffs (StdRegions::VarCoeffMap &varcoeffs)
	Update the supplied variable coefficients. More...

unsigned int	GetWspSize ()
	Get the size of the required workspace. More...

unsigned int	GetNumElmt ()
	Get number of elements. More...

StdRegions::StdExpansionSharedPtr	GetExpSharedPtr ()
	Get expansion pointer. More...

unsigned int	GetInputSize (bool defaultIn=true)

unsigned int	GetOutputSize (bool defaultOut=true)

Protected Attributes
const int	m_nquad0

const int	m_nquad1

const int	m_nquad2

const int	m_nmodes0

const int	m_nmodes1

const int	m_nmodes2

Array< OneD, const NekDouble >	m_base0

Array< OneD, const NekDouble >	m_base1

Array< OneD, const NekDouble >	m_base2

const bool	m_colldir0

const bool	m_colldir1

const bool	m_colldir2

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 More...

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 More...

unsigned int	m_outputSize
	number of modes or quadrature points that are taken as output from an operator More...

unsigned int	m_inputSizeOther
	Number of modes or quadrature points, opposite to m_inputSize. More...

unsigned int	m_outputSizeOther
	Number of modes or quadrature points, opposite to m_outputSize. More...

Private Member Functions
	BwdTrans_SumFac_Hex (vector< StdRegions::StdExpansionSharedPtr > 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 (Hex)

Definition at line 666 of file BwdTrans.cpp.

Constructor & Destructor Documentation

◆ ~BwdTrans_SumFac_Hex()

Nektar::Collections::BwdTrans_SumFac_Hex::~BwdTrans_SumFac_Hex ( )

finaldefault

◆ BwdTrans_SumFac_Hex()

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

inlineprivate

Definition at line 741 of file BwdTrans.cpp.

        : Operator(pCollExp, pGeomData, factors), BwdTrans_Helper(),
          m_nquad0(pCollExp[0]->GetNumPoints(0)),
          m_nquad1(pCollExp[0]->GetNumPoints(1)),
          m_nquad2(pCollExp[0]->GetNumPoints(2)),
          m_nmodes0(pCollExp[0]->GetBasisNumModes(0)),
          m_nmodes1(pCollExp[0]->GetBasisNumModes(1)),
          m_nmodes2(pCollExp[0]->GetBasisNumModes(2)),
          m_base0(pCollExp[0]->GetBasis(0)->GetBdata()),
          m_base1(pCollExp[0]->GetBasis(1)->GetBdata()),
          m_base2(pCollExp[0]->GetBasis(2)->GetBdata()),
          m_colldir0(pCollExp[0]->GetBasis(0)->Collocation()),
          m_colldir1(pCollExp[0]->GetBasis(1)->Collocation()),
          m_colldir2(pCollExp[0]->GetBasis(2)->Collocation())
    {
        m_wspSize = m_numElmt * m_nmodes0 *
                    (m_nmodes1 * m_nquad2 + m_nquad1 * m_nquad2);
    }

References m_nmodes0, m_nmodes1, m_nquad1, m_nquad2, Nektar::Collections::Operator::m_numElmt, and Nektar::Collections::Operator::m_wspSize.

Member Function Documentation

◆ operator()() [1/2]

void Nektar::Collections::BwdTrans_SumFac_Hex::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 674 of file BwdTrans.cpp.

    {
        if (m_colldir0 && m_colldir1 && m_colldir2)
        {
            Vmath::Vcopy(m_numElmt * m_nmodes0 * m_nmodes1 * m_nmodes2,
                         input.get(), 1, output0.get(), 1);
        }
        else
        {
            ASSERTL1(wsp.size() == m_wspSize, "Incorrect workspace size");
 
            // Assign second half of workspace for 2nd DGEMM operation.
            int totmodes = m_nmodes0 * m_nmodes1 * m_nmodes2;
 
            Array<OneD, NekDouble> wsp2 =
                wsp + m_nmodes0 * m_nmodes1 * m_nquad2 * m_numElmt;
 
            // loop over elements  and do bwd trans wrt c
            for (int n = 0; n < m_numElmt; ++n)
            {
                Blas::Dgemm('N', 'T', m_nquad2, m_nmodes0 * m_nmodes1,
                            m_nmodes2, 1.0, m_base2.get(), m_nquad2,
                            &input[n * totmodes], m_nmodes0 * m_nmodes1, 0.0,
                            &wsp[n * m_nquad2], m_nquad2 * m_numElmt);
            }
 
            // trans wrt b
            Blas::Dgemm('N', 'T', m_nquad1, m_nquad2 * m_numElmt * m_nmodes0,
                        m_nmodes1, 1.0, m_base1.get(), m_nquad1, wsp.get(),
                        m_nquad2 * m_numElmt * m_nmodes0, 0.0, wsp2.get(),
                        m_nquad1);
 
            // trans wrt a
            Blas::Dgemm('N', 'T', m_nquad0, m_nquad1 * m_nquad2 * m_numElmt,
                        m_nmodes0, 1.0, m_base0.get(), m_nquad0, wsp2.get(),
                        m_nquad1 * m_nquad2 * m_numElmt, 0.0, output0.get(),
                        m_nquad0);
        }
    }

References ASSERTL1, Blas::Dgemm(), m_base0, m_base1, m_base2, m_colldir0, m_colldir1, m_colldir2, m_nmodes0, m_nmodes1, m_nmodes2, m_nquad0, m_nquad1, m_nquad2, Nektar::Collections::Operator::m_numElmt, Nektar::Collections::Operator::m_wspSize, and Vmath::Vcopy().

◆ operator()() [2/2]

void Nektar::Collections::BwdTrans_SumFac_Hex::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 718 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_Hex::m_base0

protected

Definition at line 733 of file BwdTrans.cpp.

Referenced by operator()().

◆ m_base1

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

protected

Definition at line 734 of file BwdTrans.cpp.

Referenced by operator()().

◆ m_base2

Array<OneD, const NekDouble> Nektar::Collections::BwdTrans_SumFac_Hex::m_base2

protected

Definition at line 735 of file BwdTrans.cpp.

Referenced by operator()().

◆ m_colldir0

const bool Nektar::Collections::BwdTrans_SumFac_Hex::m_colldir0

protected

Definition at line 736 of file BwdTrans.cpp.

Referenced by operator()().

◆ m_colldir1

const bool Nektar::Collections::BwdTrans_SumFac_Hex::m_colldir1

protected

Definition at line 737 of file BwdTrans.cpp.

Referenced by operator()().

◆ m_colldir2

const bool Nektar::Collections::BwdTrans_SumFac_Hex::m_colldir2

protected

Definition at line 738 of file BwdTrans.cpp.

Referenced by operator()().

◆ m_nmodes0

const int Nektar::Collections::BwdTrans_SumFac_Hex::m_nmodes0

protected

Definition at line 730 of file BwdTrans.cpp.

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

◆ m_nmodes1

const int Nektar::Collections::BwdTrans_SumFac_Hex::m_nmodes1

protected

Definition at line 731 of file BwdTrans.cpp.

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

◆ m_nmodes2

const int Nektar::Collections::BwdTrans_SumFac_Hex::m_nmodes2

protected

Definition at line 732 of file BwdTrans.cpp.

Referenced by operator()().

◆ m_nquad0

const int Nektar::Collections::BwdTrans_SumFac_Hex::m_nquad0

protected

Definition at line 727 of file BwdTrans.cpp.

Referenced by operator()().

◆ m_nquad1

const int Nektar::Collections::BwdTrans_SumFac_Hex::m_nquad1

protected

Definition at line 728 of file BwdTrans.cpp.

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

◆ m_nquad2

const int Nektar::Collections::BwdTrans_SumFac_Hex::m_nquad2

protected

Definition at line 729 of file BwdTrans.cpp.

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

Public Member Functions

Protected Attributes

Private Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ~BwdTrans_SumFac_Hex()

◆ BwdTrans_SumFac_Hex()

Member Function Documentation

◆ operator()() [1/2]

◆ operator()() [2/2]

Member Data Documentation

◆ m_base0

◆ m_base1

◆ m_base2

◆ m_colldir0

◆ m_colldir1

◆ m_colldir2

◆ m_nmodes0

◆ m_nmodes1

◆ m_nmodes2

◆ m_nquad0

◆ m_nquad1

◆ m_nquad2