Nektar::Collections::PhysDeriv_SumFac_Quad Class Reference

Phys deriv operator using sum-factorisation (Quad) More...

Inheritance diagram for Nektar::Collections::PhysDeriv_SumFac_Quad:

Public Member Functions
	~PhysDeriv_SumFac_Quad () 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
int	m_coordim
const int	m_nquad0
const int	m_nquad1
Array< TwoD, const NekDouble >	m_derivFac
NekDouble *	m_Deriv0
NekDouble *	m_Deriv1
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
	PhysDeriv_SumFac_Quad (vector< LocalRegions::ExpansionSharedPtr > pCollExp, CoalescedGeomDataSharedPtr pGeomData, StdRegions::FactorMap factors)

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

Detailed Description

Phys deriv operator using sum-factorisation (Quad)

Definition at line 828 of file PhysDeriv.cpp.

Constructor & Destructor Documentation

~PhysDeriv_SumFac_Quad()

Nektar::Collections::PhysDeriv_SumFac_Quad::~PhysDeriv_SumFac_Quad ( )

finaldefault

PhysDeriv_SumFac_Quad()

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

inlineprivate

Definition at line 965 of file PhysDeriv.cpp.

        : Operator(pCollExp, pGeomData, factors), PhysDeriv_Helper(),
          m_nquad0(m_stdExp->GetNumPoints(0)),
          m_nquad1(m_stdExp->GetNumPoints(1))
    {
        m_coordim = pCollExp[0]->GetCoordim();
 
        m_derivFac = pGeomData->GetDerivFactors(pCollExp);
 
        m_Deriv0  = &((m_stdExp->GetBasis(0)->GetD())->GetPtr())[0];
        m_Deriv1  = &((m_stdExp->GetBasis(1)->GetD())->GetPtr())[0];
        m_wspSize = 2 * m_nquad0 * m_nquad1 * m_numElmt;
    }

References m_coordim, m_Deriv0, m_Deriv1, m_derivFac, m_nquad0, m_nquad1, Nektar::Collections::Operator::m_numElmt, Nektar::Collections::Operator::m_stdExp, and Nektar::Collections::Operator::m_wspSize.

Member Function Documentation

operator()() [1/2]

void Nektar::Collections::PhysDeriv_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  )

inlinefinalvirtual

Perform operation.

Implements Nektar::Collections::Operator.

Definition at line 836 of file PhysDeriv.cpp.

    {
        const int nqtot = m_nquad0 * m_nquad1;
        const int nqcol = nqtot * m_numElmt;
 
        ASSERTL1(wsp.size() == m_wspSize, "Incorrect workspace size");
        ASSERTL1(input.size() >= nqcol, "Incorrect input size");
 
        Array<OneD, NekDouble> diff0(nqcol, wsp);
        Array<OneD, NekDouble> diff1(nqcol, wsp + nqcol);
 
        Blas::Dgemm('N', 'N', m_nquad0, m_nquad1 * m_numElmt, m_nquad0, 1.0,
                    m_Deriv0, m_nquad0, input.data(), m_nquad0, 0.0,
                    diff0.data(), m_nquad0);
 
        int cnt = 0;
        for (int i = 0; i < m_numElmt; ++i, cnt += nqtot)
        {
            Blas::Dgemm('N', 'T', m_nquad0, m_nquad1, m_nquad1, 1.0,
                        input.data() + cnt, m_nquad0, m_Deriv1, m_nquad1, 0.0,
                        diff1.data() + cnt, m_nquad0);
        }
 
        if (m_isDeformed)
        {
            Vmath::Vmul(nqcol, m_derivFac[0], 1, diff0, 1, output0, 1);
            Vmath::Vvtvp(nqcol, m_derivFac[1], 1, diff1, 1, output0, 1, output0,
                         1);
            Vmath::Vmul(nqcol, m_derivFac[2], 1, diff0, 1, output1, 1);
            Vmath::Vvtvp(nqcol, m_derivFac[3], 1, diff1, 1, output1, 1, output1,
                         1);
 
            if (m_coordim == 3)
            {
                Vmath::Vmul(nqcol, m_derivFac[4], 1, diff0, 1, output2, 1);
                Vmath::Vvtvp(nqcol, m_derivFac[5], 1, diff1, 1, output2, 1,
                             output2, 1);
            }
        }
        else
        {
            Array<OneD, NekDouble> t;
            for (int e = 0; e < m_numElmt; ++e)
            {
                Vmath::Smul(m_nqe, m_derivFac[0][e], diff0 + e * m_nqe, 1,
                            t = output0 + e * m_nqe, 1);
                Vmath::Svtvp(m_nqe, m_derivFac[1][e], diff1 + e * m_nqe, 1,
                             output0 + e * m_nqe, 1, t = output0 + e * m_nqe,
                             1);
 
                Vmath::Smul(m_nqe, m_derivFac[2][e], diff0 + e * m_nqe, 1,
                            t = output1 + e * m_nqe, 1);
                Vmath::Svtvp(m_nqe, m_derivFac[3][e], diff1 + e * m_nqe, 1,
                             output1 + e * m_nqe, 1, t = output1 + e * m_nqe,
                             1);
            }
 
            if (m_coordim == 3)
            {
                for (int e = 0; e < m_numElmt; ++e)
                {
                    Vmath::Smul(m_nqe, m_derivFac[4][e], diff0 + e * m_nqe, 1,
                                t = output2 + e * m_nqe, 1);
                    Vmath::Svtvp(m_nqe, m_derivFac[5][e], diff1 + e * m_nqe, 1,
                                 output2 + e * m_nqe, 1,
                                 t = output2 + e * m_nqe, 1);
                }
            }
        }
    }

References ASSERTL1, Blas::Dgemm(), m_coordim, m_Deriv0, m_Deriv1, m_derivFac, Nektar::Collections::Operator::m_isDeformed, Nektar::Collections::Operator::m_nqe, m_nquad0, m_nquad1, Nektar::Collections::Operator::m_numElmt, Nektar::Collections::Operator::m_wspSize, Vmath::Smul(), Vmath::Svtvp(), Vmath::Vmul(), and Vmath::Vvtvp().

operator()() [2/2]

void Nektar::Collections::PhysDeriv_SumFac_Quad::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 911 of file PhysDeriv.cpp.

    {
        const int nqtot = m_nquad0 * m_nquad1;
        const int nqcol = nqtot * m_numElmt;
 
        ASSERTL1(wsp.size() == m_wspSize, "Incorrect workspace size");
        ASSERTL1(input.size() >= nqcol, "Incorrect input size");
 
        Array<OneD, NekDouble> diff0(nqcol, wsp);
        Array<OneD, NekDouble> diff1(nqcol, wsp + nqcol);
 
        Blas::Dgemm('N', 'N', m_nquad0, m_nquad1 * m_numElmt, m_nquad0, 1.0,
                    m_Deriv0, m_nquad0, input.data(), m_nquad0, 0.0,
                    diff0.data(), m_nquad0);
 
        int cnt = 0;
        for (int i = 0; i < m_numElmt; ++i, cnt += nqtot)
        {
            Blas::Dgemm('N', 'T', m_nquad0, m_nquad1, m_nquad1, 1.0,
                        input.data() + cnt, m_nquad0, m_Deriv1, m_nquad1, 0.0,
                        diff1.data() + cnt, m_nquad0);
        }
 
        if (m_isDeformed)
        {
            Vmath::Vmul(nqcol, m_derivFac[2 * dir], 1, diff0, 1, output, 1);
            Vmath::Vvtvp(nqcol, m_derivFac[2 * dir + 1], 1, diff1, 1, output, 1,
                         output, 1);
        }
        else
        {
            Array<OneD, NekDouble> t;
            for (int e = 0; e < m_numElmt; ++e)
            {
                Vmath::Smul(m_nqe, m_derivFac[2 * dir][e], diff0 + e * m_nqe, 1,
                            t = output + e * m_nqe, 1);
                Vmath::Svtvp(m_nqe, m_derivFac[2 * dir + 1][e],
                             diff1 + e * m_nqe, 1, output + e * m_nqe, 1,
                             t = output + e * m_nqe, 1);
            }
        }
    }

References ASSERTL1, Blas::Dgemm(), m_Deriv0, m_Deriv1, m_derivFac, Nektar::Collections::Operator::m_isDeformed, Nektar::Collections::Operator::m_nqe, m_nquad0, m_nquad1, Nektar::Collections::Operator::m_numElmt, Nektar::Collections::Operator::m_wspSize, Vmath::Smul(), Vmath::Svtvp(), Vmath::Vmul(), and Vmath::Vvtvp().

Member Data Documentation

m_coordim

int Nektar::Collections::PhysDeriv_SumFac_Quad::m_coordim

protected

Definition at line 957 of file PhysDeriv.cpp.

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

m_Deriv0

NekDouble* Nektar::Collections::PhysDeriv_SumFac_Quad::m_Deriv0

protected

Definition at line 961 of file PhysDeriv.cpp.

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

m_Deriv1

NekDouble* Nektar::Collections::PhysDeriv_SumFac_Quad::m_Deriv1

protected

Definition at line 962 of file PhysDeriv.cpp.

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

m_derivFac

Array<TwoD, const NekDouble> Nektar::Collections::PhysDeriv_SumFac_Quad::m_derivFac

protected

Definition at line 960 of file PhysDeriv.cpp.

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

m_nquad0

const int Nektar::Collections::PhysDeriv_SumFac_Quad::m_nquad0

protected

Definition at line 958 of file PhysDeriv.cpp.

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

m_nquad1

const int Nektar::Collections::PhysDeriv_SumFac_Quad::m_nquad1

protected

Definition at line 959 of file PhysDeriv.cpp.

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