Nektar::Collections::BwdTrans_SumFac_Pyr Class Reference

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

Inheritance diagram for Nektar::Collections::BwdTrans_SumFac_Pyr:

Public Member Functions
	~BwdTrans_SumFac_Pyr () 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 final
	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
bool	m_sortTopVertex
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_Pyr (vector< StdRegions::StdExpansionSharedPtr > pCollExp, CoalescedGeomDataSharedPtr pGeomData, StdRegions::FactorMap factors)

Detailed Description

Backward transform operator using sum-factorisation (Pyr)

Definition at line 1168 of file BwdTrans.cpp.

Constructor & Destructor Documentation

~BwdTrans_SumFac_Pyr()

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

inlinefinal

Definition at line 1173 of file BwdTrans.cpp.

    {
    }

BwdTrans_SumFac_Pyr()

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

inlineprivate

Definition at line 1297 of file BwdTrans.cpp.

        : Operator(pCollExp, pGeomData, factors),
          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.

Member Function Documentation

CheckFactors()

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

inlineoverridevirtual

Check the validity of the supplied factor map.

Implements Nektar::Collections::Operator.

Definition at line 1277 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_Pyr::operator() ( const Array< OneD, const NekDouble > &  input, Array< OneD, NekDouble > &  output0, Array< OneD, NekDouble > &  output1, Array< OneD, NekDouble > &  output2, Array< OneD, NekDouble > &  wsp  )

inlinefinaloverridevirtual

Perform operation.

Implements Nektar::Collections::Operator.

Definition at line 1177 of file BwdTrans.cpp.

    {
        boost::ignore_unused(output1, output2);
 
        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.get() + mode * m_nquad2, m_nquad2,
                            input.get() + mode1, totmodes, 0.0,
                            wsp.get() + 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 - i; ++j)
            {
                int ijmax = max(i, j);
                mode += m_nmodes2 - ijmax;
            }
        }
 
        // 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.get() + 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.get() + 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.get() + 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.get(), m_nquad1,
                        wsp.get() + mode * m_nquad2 * m_numElmt,
                        m_nquad2 * m_numElmt, 0.0,
                        wsp2.get() + 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.get(), m_nquad0, wsp2.get(),
                    m_nquad1 * m_nquad2 * m_numElmt, 0.0, output.get(),
                    m_nquad0);
    }

References ASSERTL1, Blas::Daxpy(), Blas::Dgemm(), 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  )

inlinefinaloverridevirtual

Implements Nektar::Collections::Operator.

Definition at line 1269 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_Pyr::m_base0

protected

Definition at line 1291 of file BwdTrans.cpp.

m_base1

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

protected

Definition at line 1292 of file BwdTrans.cpp.

m_base2

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

protected

Definition at line 1293 of file BwdTrans.cpp.

m_nmodes0

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

protected

Definition at line 1288 of file BwdTrans.cpp.

m_nmodes1

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

protected

Definition at line 1289 of file BwdTrans.cpp.

m_nmodes2

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

protected

Definition at line 1290 of file BwdTrans.cpp.

m_nquad0

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

protected

Definition at line 1285 of file BwdTrans.cpp.

m_nquad1

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

protected

Definition at line 1286 of file BwdTrans.cpp.

m_nquad2

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

protected

Definition at line 1287 of file BwdTrans.cpp.

m_sortTopVertex

bool Nektar::Collections::BwdTrans_SumFac_Pyr::m_sortTopVertex

protected

Definition at line 1294 of file BwdTrans.cpp.