Nektar::Collections::PhysDeriv_SumFac_Hex Class Reference

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

Inheritance diagram for Nektar::Collections::PhysDeriv_SumFac_Hex:

Public Member Functions
virtual	~PhysDeriv_SumFac_Hex ()
virtual void	operator() (const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output0, Array< OneD, NekDouble > &output1, Array< OneD, NekDouble > &output2, Array< OneD, NekDouble > &wsp)
	Perform operation. More...
virtual void	operator() (int dir, const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output, Array< OneD, NekDouble > &wsp)
Public Member Functions inherited from Nektar::Collections::Operator
	Operator (std::vector< StdRegions::StdExpansionSharedPtr > pCollExp, std::shared_ptr< CoalescedGeomData > GeomData)
	Constructor. More...
virtual COLLECTIONS_EXPORT	~Operator ()
int	GetWspSize ()
	Get the size of the required workspace. More...

Protected Attributes
Array< TwoD, const NekDouble >	m_derivFac
int	m_coordim
const int	m_nquad0
const int	m_nquad1
const int	m_nquad2
NekDouble *	m_Deriv0
NekDouble *	m_Deriv1
NekDouble *	m_Deriv2
Protected Attributes inherited from Nektar::Collections::Operator
StdRegions::StdExpansionSharedPtr	m_stdExp
unsigned int	m_numElmt
unsigned int	m_wspSize

Private Member Functions
	PhysDeriv_SumFac_Hex (vector< StdRegions::StdExpansionSharedPtr > pCollExp, CoalescedGeomDataSharedPtr pGeomData)

Detailed Description

Phys deriv operator using sum-factorisation (Hex)

Definition at line 922 of file PhysDeriv.cpp.

Constructor & Destructor Documentation

~PhysDeriv_SumFac_Hex()

virtual Nektar::Collections::PhysDeriv_SumFac_Hex::~PhysDeriv_SumFac_Hex ( )

inlinevirtual

Definition at line 927 of file PhysDeriv.cpp.

        {
        }

PhysDeriv_SumFac_Hex()

Nektar::Collections::PhysDeriv_SumFac_Hex::PhysDeriv_SumFac_Hex ( vector< StdRegions::StdExpansionSharedPtr >  pCollExp, CoalescedGeomDataSharedPtr  pGeomData  )

inlineprivate

Definition at line 1044 of file PhysDeriv.cpp.

References Nektar::LibUtilities::eHexahedron, Nektar::Collections::ePhysDeriv, Nektar::Collections::eSumFac, Nektar::Collections::GetOperatorFactory(), and Nektar::LibUtilities::NekFactory< tKey, tBase, tParam >::RegisterCreatorFunction().

            : Operator(pCollExp, pGeomData),
              m_nquad0  (m_stdExp->GetNumPoints(0)),
              m_nquad1  (m_stdExp->GetNumPoints(1)),
              m_nquad2  (m_stdExp->GetNumPoints(2))
        {
            LibUtilities::PointsKeyVector PtsKey = m_stdExp->GetPointsKeys();

            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_Deriv2 = &((m_stdExp->GetBasis(2)->GetD())->GetPtr())[0];

            m_wspSize = 3*m_nquad0*m_nquad1*m_nquad2*m_numElmt;
        }

Member Function Documentation

operator()() [1/2]

virtual void Nektar::Collections::PhysDeriv_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  )

inlinevirtual

Perform operation.

Implements Nektar::Collections::Operator.

Definition at line 931 of file PhysDeriv.cpp.

References Blas::Dgemm(), Vmath::Vmul(), and Vmath::Vvtvp().

        {
            int nPhys = m_stdExp->GetTotPoints();
            int ntot = m_numElmt*nPhys;
            Array<OneD, NekDouble> tmp0,tmp1,tmp2;
            Array<OneD, Array<OneD, NekDouble> > Diff(3);
            Array<OneD, Array<OneD, NekDouble> > out(3);
            out[0] = output0;  out[1] = output1;    out[2] = output2;

            for(int i = 0; i < 3; ++i)
            {
                Diff[i] = wsp + i*ntot;
            }

            Blas::Dgemm('N','N', m_nquad0,m_nquad1*m_nquad2*m_numElmt,
                        m_nquad0,1.0, m_Deriv0,m_nquad0,&input[0],
                        m_nquad0,0.0,&Diff[0][0],m_nquad0);

            for(int  i = 0; i < m_numElmt; ++i)
            {
                for (int j = 0; j < m_nquad2; ++j)
                {
                    Blas::Dgemm('N', 'T', m_nquad0, m_nquad1, m_nquad1,
                                1.0, &input[i*nPhys+j*m_nquad0*m_nquad1],
                                m_nquad0, m_Deriv1, m_nquad1, 0.0,
                                &Diff[1][i*nPhys+j*m_nquad0*m_nquad1],
                                m_nquad0);
                }

                Blas::Dgemm('N','T',m_nquad0*m_nquad1,m_nquad2,m_nquad2,
                            1.0, &input[i*nPhys],m_nquad0*m_nquad1,
                            m_Deriv2,m_nquad2, 0.0,&Diff[2][i*nPhys],
                            m_nquad0*m_nquad1);
            }

            // calculate full derivative
            for(int i = 0; i < m_coordim; ++i)
            {
                Vmath::Vmul(ntot,m_derivFac[i*3],1,Diff[0],1,out[i],1);
                for(int j = 1; j < 3; ++j)
                {
                    Vmath::Vvtvp (ntot, m_derivFac[i*3+j], 1,
                                        Diff[j],               1,
                                        out[i],                1,
                                        out[i],                1);
                }
            }
        }

operator()() [2/2]

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

inlinevirtual

Implements Nektar::Collections::Operator.

Definition at line 985 of file PhysDeriv.cpp.

References Blas::Dgemm(), Vmath::Vmul(), and Vmath::Vvtvp().

        {
            int nPhys = m_stdExp->GetTotPoints();
            int ntot = m_numElmt*nPhys;
            Array<OneD, NekDouble> tmp0,tmp1,tmp2;
            Array<OneD, Array<OneD, NekDouble> > Diff(3);

            for(int i = 0; i < 3; ++i)
            {
                Diff[i] = wsp + i*ntot;
            }

            Blas::Dgemm('N','N', m_nquad0,m_nquad1*m_nquad2*m_numElmt,
                        m_nquad0,1.0, m_Deriv0,m_nquad0,&input[0],
                        m_nquad0,0.0,&Diff[0][0],m_nquad0);

            for(int  i = 0; i < m_numElmt; ++i)
            {
                for (int j = 0; j < m_nquad2; ++j)
                {
                    Blas::Dgemm('N', 'T', m_nquad0, m_nquad1, m_nquad1,
                                1.0, &input[i*nPhys+j*m_nquad0*m_nquad1],
                                m_nquad0, m_Deriv1, m_nquad1, 0.0,
                                &Diff[1][i*nPhys+j*m_nquad0*m_nquad1],
                                m_nquad0);
                }

                Blas::Dgemm('N','T',m_nquad0*m_nquad1,m_nquad2,m_nquad2,
                            1.0, &input[i*nPhys],m_nquad0*m_nquad1,
                            m_Deriv2,m_nquad2, 0.0,&Diff[2][i*nPhys],
                            m_nquad0*m_nquad1);
            }

            // calculate full derivative
            Vmath::Vmul(ntot,m_derivFac[dir*3],1,Diff[0],1,output,1);
            for(int j = 1; j < 3; ++j)
            {
                Vmath::Vvtvp (ntot, m_derivFac[dir*3+j], 1,
                                    Diff[j],               1,
                                    output,                1,
                                    output,                1);
            }
        }

Member Data Documentation

m_coordim

int Nektar::Collections::PhysDeriv_SumFac_Hex::m_coordim

protected

Definition at line 1035 of file PhysDeriv.cpp.

m_Deriv0

NekDouble* Nektar::Collections::PhysDeriv_SumFac_Hex::m_Deriv0

protected

Definition at line 1039 of file PhysDeriv.cpp.

m_Deriv1

NekDouble* Nektar::Collections::PhysDeriv_SumFac_Hex::m_Deriv1

protected

Definition at line 1040 of file PhysDeriv.cpp.

m_Deriv2

NekDouble* Nektar::Collections::PhysDeriv_SumFac_Hex::m_Deriv2

protected

Definition at line 1041 of file PhysDeriv.cpp.

m_derivFac

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

protected

Definition at line 1034 of file PhysDeriv.cpp.

m_nquad0

const int Nektar::Collections::PhysDeriv_SumFac_Hex::m_nquad0

protected

Definition at line 1036 of file PhysDeriv.cpp.

m_nquad1

const int Nektar::Collections::PhysDeriv_SumFac_Hex::m_nquad1

protected

Definition at line 1037 of file PhysDeriv.cpp.

m_nquad2

const int Nektar::Collections::PhysDeriv_SumFac_Hex::m_nquad2

protected

Definition at line 1038 of file PhysDeriv.cpp.