Nektar::Collections::BwdTrans_SumFac_Hex Class Reference

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

Inheritance diagram for Nektar::Collections::BwdTrans_SumFac_Hex:

Public Member Functions
	~BwdTrans_SumFac_Hex () final
void	operator() (const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output, 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) override final
virtual void	CheckFactors (StdRegions::FactorMap factors, int coll_phys_offset) override
	Check the validity of the supplied factor map. More...
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 COLLECTIONS_EXPORT	~Operator ()
unsigned int	GetWspSize ()
	Get the size of the required workspace. More...
unsigned int	GetNumElmt ()
	Get expansion pointer. More...
StdRegions::StdExpansionSharedPtr	GetExpSharedPtr ()
	Get expansion pointer. More...

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
unsigned int	m_nqe
unsigned int	m_wspSize

Private Member Functions
	BwdTrans_SumFac_Hex (vector< StdRegions::StdExpansionSharedPtr > pCollExp, CoalescedGeomDataSharedPtr pGeomData, StdRegions::FactorMap factors)

Detailed Description

Backward transform operator using sum-factorisation (Hex)

Definition at line 729 of file BwdTrans.cpp.

Constructor & Destructor Documentation

~BwdTrans_SumFac_Hex()

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

inlinefinal

Definition at line 734 of file BwdTrans.cpp.

    {
    }

BwdTrans_SumFac_Hex()

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

inlineprivate

Definition at line 814 of file BwdTrans.cpp.

        : Operator(pCollExp, pGeomData, factors),
          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);
    }

Member Function Documentation

CheckFactors()

virtual void Nektar::Collections::BwdTrans_SumFac_Hex::CheckFactors ( StdRegions::FactorMap  factors, int  coll_phys_offset  )

inlineoverridevirtual

Check the validity of the supplied factor map.

Implements Nektar::Collections::Operator.

Definition at line 792 of file BwdTrans.cpp.

    {
        boost::ignore_unused(factors, coll_phys_offset);
        ASSERTL0(false, "Not valid for this operator.");
    }

References ASSERTL0.

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 738 of file BwdTrans.cpp.

    {
        boost::ignore_unused(output1, output2);
 
        if (m_colldir0 && m_colldir1 && m_colldir2)
        {
            Vmath::Vcopy(m_numElmt * m_nmodes0 * m_nmodes1 * m_nmodes2,
                         input.get(), 1, output.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, output.get(),
                        m_nquad0);
        }
    }

References ASSERTL1, Blas::Dgemm(), 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  )

inlinefinaloverridevirtual

Implements Nektar::Collections::Operator.

Definition at line 784 of file BwdTrans.cpp.

    {
        boost::ignore_unused(dir, input, output, wsp);
        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 806 of file BwdTrans.cpp.

m_base1

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

protected

Definition at line 807 of file BwdTrans.cpp.

m_base2

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

protected

Definition at line 808 of file BwdTrans.cpp.

m_colldir0

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

protected

Definition at line 809 of file BwdTrans.cpp.

m_colldir1

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

protected

Definition at line 810 of file BwdTrans.cpp.

m_colldir2

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

protected

Definition at line 811 of file BwdTrans.cpp.

m_nmodes0

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

protected

Definition at line 803 of file BwdTrans.cpp.

m_nmodes1

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

protected

Definition at line 804 of file BwdTrans.cpp.

m_nmodes2

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

protected

Definition at line 805 of file BwdTrans.cpp.

m_nquad0

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

protected

Definition at line 800 of file BwdTrans.cpp.

m_nquad1

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

protected

Definition at line 801 of file BwdTrans.cpp.

m_nquad2

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

protected

Definition at line 802 of file BwdTrans.cpp.