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

Inheritance diagram for Nektar::Collections::BwdTrans_SumFac_Pyr:

Public Member Functions
	~BwdTrans_SumFac_Pyr () 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) final
	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_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

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_Pyr (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 (Pyr)

Definition at line 1077 of file BwdTrans.cpp.

Constructor & Destructor Documentation

◆ ~BwdTrans_SumFac_Pyr()

Nektar::Collections::BwdTrans_SumFac_Pyr::~BwdTrans_SumFac_Pyr ( )

finaldefault

◆ BwdTrans_SumFac_Pyr()

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

inlineprivate

Definition at line 1195 of file BwdTrans.cpp.

        : Operator(pCollExp, pGeomData, factors), BwdTrans_Helper(),
          m_nquad0(m_stdExp->GetNumPoints(0)),
          m_nquad1(m_stdExp->GetNumPoints(1)),
          m_nquad2(m_stdExp->GetNumPoints(2)),
          m_nmodes0(m_stdExp->GetBasisNumModes(0)),
          m_nmodes1(m_stdExp->GetBasisNumModes(1)),
          m_nmodes2(m_stdExp->GetBasisNumModes(2)),
          m_base0(m_stdExp->GetBasis(0)->GetBdata()),
          m_base1(m_stdExp->GetBasis(1)->GetBdata()),
          m_base2(m_stdExp->GetBasis(2)->GetBdata())
    {
        m_wspSize = m_numElmt * m_nmodes0 * m_nquad2 * (m_nmodes1 + m_nquad1);
 
        if (m_stdExp->GetBasis(0)->GetBasisType() == LibUtilities::eModified_A)
        {
            m_sortTopVertex = true;
        }
        else
        {
            m_sortTopVertex = false;
        }
    }

References Nektar::LibUtilities::eModified_A, m_nmodes0, m_nmodes1, m_nquad1, m_nquad2, 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_Pyr::operator()	(	const Array< OneD, const NekDouble > &	input,
		Array< OneD, NekDouble > &	output0,
		Array< OneD, NekDouble > &	output1,
		Array< OneD, NekDouble > &	output2,
		Array< OneD, NekDouble > &	wsp
	)

inlinefinalvirtual

Perform operation.

Implements Nektar::Collections::Operator.

Definition at line 1085 of file BwdTrans.cpp.

    {
        ASSERTL1(wsp.size() == m_wspSize, "Incorrect workspace size");
 
        // Assign second half of workspace for 2nd DGEMM operation.
        int totmodes = m_stdExp->GetNcoeffs();
 
        Array<OneD, NekDouble> wsp2 =
            wsp + m_nmodes0 * m_nmodes1 * m_nquad2 * m_numElmt;
 
        Vmath::Zero(m_nmodes0 * m_nmodes1 * m_nquad2 * m_numElmt, wsp, 1);
        int i     = 0;
        int j     = 0;
        int mode  = 0;
        int mode1 = 0;
        int cnt   = 0;
        for (i = 0; i < m_nmodes0; ++i)
        {
            for (j = 0; j < m_nmodes1; ++j, ++cnt)
            {
                int ijmax = max(i, j);
                Blas::Dgemm('N', 'N', m_nquad2, m_numElmt, m_nmodes2 - ijmax,
                            1.0, m_base2.data() + mode * m_nquad2, m_nquad2,
                            input.data() + mode1, totmodes, 0.0,
                            wsp.data() + cnt * m_nquad2 * m_numElmt, m_nquad2);
                mode += m_nmodes2 - ijmax;
                mode1 += m_nmodes2 - ijmax;
            }
 
            // increment mode in case order1!=order2
            for (j = m_nmodes1; j < m_nmodes2; ++j)
            {
                mode += m_nmodes2 - j;
            }
        }
 
        // vertex mode - currently (1+c)/2 x (1-b)/2 x (1-a)/2
        // component is evaluated
        if (m_sortTopVertex)
        {
            for (i = 0; i < m_numElmt; ++i)
            {
                // top singular vertex
                // (1+c)/2 x (1+b)/2 x (1-a)/2 component
                Blas::Daxpy(m_nquad2, input[1 + i * totmodes],
                            m_base2.data() + m_nquad2, 1,
                            &wsp[m_nquad2 * m_numElmt] + i * m_nquad2, 1);
 
                // top singular vertex
                // (1+c)/2 x (1-b)/2 x (1+a)/2 component
                Blas::Daxpy(
                    m_nquad2, input[1 + i * totmodes],
                    m_base2.data() + m_nquad2, 1,
                    &wsp[m_nmodes1 * m_nquad2 * m_numElmt] + i * m_nquad2, 1);
 
                // top singular vertex
                // (1+c)/2 x (1+b)/2 x (1+a)/2 component
                Blas::Daxpy(m_nquad2, input[1 + i * totmodes],
                            m_base2.data() + m_nquad2, 1,
                            &wsp[(m_nmodes1 + 1) * m_nquad2 * m_numElmt] +
                                i * m_nquad2,
                            1);
            }
        }
 
        // Perform summation over '1' direction
        mode = 0;
        for (i = 0; i < m_nmodes0; ++i)
        {
            Blas::Dgemm('N', 'T', m_nquad1, m_nquad2 * m_numElmt, m_nmodes1,
                        1.0, m_base1.data(), m_nquad1,
                        wsp.data() + mode * m_nquad2 * m_numElmt,
                        m_nquad2 * m_numElmt, 0.0,
                        wsp2.data() + i * m_nquad1 * m_nquad2 * m_numElmt,
                        m_nquad1);
            mode += m_nmodes1;
        }
 
        // Perform summation over '0' direction
        Blas::Dgemm('N', 'T', m_nquad0, m_nquad1 * m_nquad2 * m_numElmt,
                    m_nmodes0, 1.0, m_base0.data(), m_nquad0, wsp2.data(),
                    m_nquad1 * m_nquad2 * m_numElmt, 0.0, output0.data(),
                    m_nquad0);
    }

References ASSERTL1, Blas::Daxpy(), Blas::Dgemm(), m_base0, m_base1, m_base2, m_nmodes0, m_nmodes1, m_nmodes2, m_nquad0, m_nquad1, m_nquad2, Nektar::Collections::Operator::m_numElmt, m_sortTopVertex, Nektar::Collections::Operator::m_stdExp, Nektar::Collections::Operator::m_wspSize, tinysimd::max(), and Vmath::Zero().

◆ operator()() [2/2]

void Nektar::Collections::BwdTrans_SumFac_Pyr::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 1174 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_Pyr::m_base0

protected

Definition at line 1189 of file BwdTrans.cpp.

Referenced by operator()().

◆ m_base1

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

protected

Definition at line 1190 of file BwdTrans.cpp.

Referenced by operator()().

◆ m_base2

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

protected

Definition at line 1191 of file BwdTrans.cpp.

Referenced by operator()().

◆ m_nmodes0

const int Nektar::Collections::BwdTrans_SumFac_Pyr::m_nmodes0

protected

Definition at line 1186 of file BwdTrans.cpp.

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

◆ m_nmodes1

const int Nektar::Collections::BwdTrans_SumFac_Pyr::m_nmodes1

protected

Definition at line 1187 of file BwdTrans.cpp.

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

◆ m_nmodes2

const int Nektar::Collections::BwdTrans_SumFac_Pyr::m_nmodes2

protected

Definition at line 1188 of file BwdTrans.cpp.

Referenced by operator()().

◆ m_nquad0

const int Nektar::Collections::BwdTrans_SumFac_Pyr::m_nquad0

protected

Definition at line 1183 of file BwdTrans.cpp.

Referenced by operator()().

◆ m_nquad1

const int Nektar::Collections::BwdTrans_SumFac_Pyr::m_nquad1

protected

Definition at line 1184 of file BwdTrans.cpp.

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

◆ m_nquad2

const int Nektar::Collections::BwdTrans_SumFac_Pyr::m_nquad2

protected

Definition at line 1185 of file BwdTrans.cpp.

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

◆ m_sortTopVertex

bool Nektar::Collections::BwdTrans_SumFac_Pyr::m_sortTopVertex

protected

Definition at line 1192 of file BwdTrans.cpp.

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

Public Member Functions

Protected Attributes

Private Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ~BwdTrans_SumFac_Pyr()

◆ BwdTrans_SumFac_Pyr()

Member Function Documentation

◆ operator()() [1/2]

◆ operator()() [2/2]

Member Data Documentation

◆ m_base0

◆ m_base1

◆ m_base2

◆ m_nmodes0

◆ m_nmodes1

◆ m_nmodes2

◆ m_nquad0

◆ m_nquad1

◆ m_nquad2

◆ m_sortTopVertex