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Nektar::Collections::BwdTrans_SumFac_Prism Class Reference

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

Inheritance diagram for Nektar::Collections::BwdTrans_SumFac_Prism:
[legend]

Public Member Functions

 ~BwdTrans_SumFac_Prism () 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) final
 Perform operation. More...
 
void operator() (int dir, const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output, Array< OneD, NekDouble > &wsp) final
 
virtual void CheckFactors (StdRegions::FactorMap factors, int coll_phys_offset)
 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_Prism (vector< StdRegions::StdExpansionSharedPtr > pCollExp, CoalescedGeomDataSharedPtr pGeomData, StdRegions::FactorMap factors)
 

Detailed Description

Backward transform operator using sum-factorisation (Prism)

Definition at line 1029 of file BwdTrans.cpp.

Constructor & Destructor Documentation

◆ ~BwdTrans_SumFac_Prism()

Nektar::Collections::BwdTrans_SumFac_Prism::~BwdTrans_SumFac_Prism ( )
inlinefinal

Definition at line 1034 of file BwdTrans.cpp.

1035  {
1036  }

◆ BwdTrans_SumFac_Prism()

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

Definition at line 1139 of file BwdTrans.cpp.

1142  : Operator(pCollExp, pGeomData, factors), m_nquad0(m_stdExp->GetNumPoints(0)),
1143  m_nquad1(m_stdExp->GetNumPoints(1)),
1144  m_nquad2(m_stdExp->GetNumPoints(2)),
1145  m_nmodes0(m_stdExp->GetBasisNumModes(0)),
1146  m_nmodes1(m_stdExp->GetBasisNumModes(1)),
1147  m_nmodes2(m_stdExp->GetBasisNumModes(2)),
1148  m_base0(m_stdExp->GetBasis(0)->GetBdata()),
1149  m_base1(m_stdExp->GetBasis(1)->GetBdata()),
1150  m_base2(m_stdExp->GetBasis(2)->GetBdata())
1151  {
1152  m_wspSize = m_numElmt * m_nmodes0 *
1153  (m_nmodes1 * m_nquad2 + m_nquad1 * m_nquad2);
1154 
1155  if (m_stdExp->GetBasis(0)->GetBasisType() == LibUtilities::eModified_A)
1156  {
1157  m_sortTopVertex = true;
1158  }
1159  else
1160  {
1161  m_sortTopVertex = false;
1162  }
1163  }
Nektar::Collections::BwdTrans_SumFac_Prism::m_nmodes0
const int m_nmodes0
Definition: BwdTrans.cpp:1130
Nektar::Collections::BwdTrans_SumFac_Prism::m_sortTopVertex
bool m_sortTopVertex
Definition: BwdTrans.cpp:1136
Nektar::Collections::BwdTrans_SumFac_Prism::m_nquad2
const int m_nquad2
Definition: BwdTrans.cpp:1129
Nektar::Collections::BwdTrans_SumFac_Prism::m_nmodes1
const int m_nmodes1
Definition: BwdTrans.cpp:1131
Nektar::Collections::BwdTrans_SumFac_Prism::m_nquad0
const int m_nquad0
Definition: BwdTrans.cpp:1127
Nektar::Collections::BwdTrans_SumFac_Prism::m_nquad1
const int m_nquad1
Definition: BwdTrans.cpp:1128
Nektar::Collections::BwdTrans_SumFac_Prism::m_nmodes2
const int m_nmodes2
Definition: BwdTrans.cpp:1132
Nektar::Collections::BwdTrans_SumFac_Prism::m_base0
Array< OneD, const NekDouble > m_base0
Definition: BwdTrans.cpp:1133
Nektar::Collections::BwdTrans_SumFac_Prism::m_base1
Array< OneD, const NekDouble > m_base1
Definition: BwdTrans.cpp:1134
Nektar::Collections::BwdTrans_SumFac_Prism::m_base2
Array< OneD, const NekDouble > m_base2
Definition: BwdTrans.cpp:1135
Nektar::Collections::Operator::m_stdExp
StdRegions::StdExpansionSharedPtr m_stdExp
Definition: Operator.h:167
Nektar::Collections::Operator::Operator
Operator(std::vector< StdRegions::StdExpansionSharedPtr > pCollExp, std::shared_ptr< CoalescedGeomData > GeomData, StdRegions::FactorMap factors)
Constructor.
Definition: Operator.cpp:41
Nektar::LibUtilities::eModified_A
@ eModified_A
Principle Modified Functions .
Definition: BasisType.h:48

References Nektar::LibUtilities::eModified_A.

Member Function Documentation

◆ CheckFactors()

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

Check the validity of the supplied factor map.

Implements Nektar::Collections::Operator.

Definition at line 1118 of file BwdTrans.cpp.

1120  {
1121  boost::ignore_unused(factors, coll_phys_offset);
1122  ASSERTL0(false, "Not valid for this operator.");
1123  }
ASSERTL0
#define ASSERTL0(condition, msg)
Definition: ErrorUtil.hpp:216

References ASSERTL0.

◆ operator()() [1/2]

void Nektar::Collections::BwdTrans_SumFac_Prism::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 1038 of file BwdTrans.cpp.

1043  {
1044  boost::ignore_unused(output1, output2);
1045 
1046  ASSERTL1(wsp.size() == m_wspSize, "Incorrect workspace size");
1047 
1048  // Assign second half of workspace for 2nd DGEMM operation.
1049  int totmodes = m_stdExp->GetNcoeffs();
1050 
1051  Array<OneD, NekDouble> wsp2 =
1052  wsp + m_nmodes0 * m_nmodes1 * m_nquad2 * m_numElmt;
1053 
1054  Vmath::Zero(m_nmodes0 * m_nmodes1 * m_nquad2 * m_numElmt, wsp, 1);
1055  int i = 0;
1056  int j = 0;
1057  int mode = 0;
1058  int mode1 = 0;
1059  int cnt = 0;
1060  for (i = mode = mode1 = 0; i < m_nmodes0; ++i)
1061  {
1062  cnt = i * m_nquad2 * m_numElmt;
1063  for (j = 0; j < m_nmodes1; ++j)
1064  {
1065  Blas::Dgemm('N', 'N', m_nquad2, m_numElmt, m_nmodes2 - i, 1.0,
1066  m_base2.get() + mode * m_nquad2, m_nquad2,
1067  input.get() + mode1, totmodes, 0.0,
1068  &wsp[j * m_nquad2 * m_numElmt * m_nmodes0 + cnt],
1069  m_nquad2);
1070  mode1 += m_nmodes2 - i;
1071  }
1072  mode += m_nmodes2 - i;
1073  }
1074 
1075  // fix for modified basis by splitting top vertex mode
1076  if (m_sortTopVertex)
1077  {
1078  for (j = 0; j < m_nmodes1; ++j)
1079  {
1080  for (i = 0; i < m_numElmt; ++i)
1081  {
1082  Blas::Daxpy(m_nquad2,
1083  input[1 + i * totmodes + j * m_nmodes2],
1084  m_base2.get() + m_nquad2, 1,
1085  &wsp[j * m_nquad2 * m_numElmt * m_nmodes0 +
1086  m_nquad2 * m_numElmt] +
1087  i * m_nquad2,
1088  1);
1089  }
1090  }
1091  // Believe this could be made into a m_nmodes1
1092  // dgemv if we made an array of m_numElmt copies
1093  // of m_base2[m_quad2] (which are of size
1094  // m_nquad2.
1095  }
1096 
1097  // Perform summation over '1' direction
1098  Blas::Dgemm('N', 'T', m_nquad1, m_nquad2 * m_numElmt * m_nmodes0,
1099  m_nmodes1, 1.0, m_base1.get(), m_nquad1, wsp.get(),
1100  m_nquad2 * m_numElmt * m_nmodes0, 0.0, wsp2.get(),
1101  m_nquad1);
1102 
1103  // Perform summation over '0' direction
1104  Blas::Dgemm('N', 'T', m_nquad0, m_nquad1 * m_nquad2 * m_numElmt,
1105  m_nmodes0, 1.0, m_base0.get(), m_nquad0, wsp2.get(),
1106  m_nquad1 * m_nquad2 * m_numElmt, 0.0, output.get(),
1107  m_nquad0);
1108  }
ASSERTL1
#define ASSERTL1(condition, msg)
Assert Level 1 – Debugging which is used whether in FULLDEBUG or DEBUG compilation mode....
Definition: ErrorUtil.hpp:250
Blas::Dgemm
static void Dgemm(const char &transa, const char &transb, const int &m, const int &n, const int &k, const double &alpha, const double *a, const int &lda, const double *b, const int &ldb, const double &beta, double *c, const int &ldc)
BLAS level 3: Matrix-matrix multiply C = A x B where op(A)[m x k], op(B)[k x n], C[m x n] DGEMM perfo...
Definition: Blas.hpp:394
Blas::Daxpy
static void Daxpy(const int &n, const double &alpha, const double *x, const int &incx, const double *y, const int &incy)
BLAS level 1: y = alpha x plus y.
Definition: Blas.hpp:167
Vmath::Zero
void Zero(int n, T *x, const int incx)
Zero vector.
Definition: Vmath.cpp:436

References ASSERTL1, Blas::Daxpy(), Blas::Dgemm(), and Vmath::Zero().

◆ operator()() [2/2]

void Nektar::Collections::BwdTrans_SumFac_Prism::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 1110 of file BwdTrans.cpp.

1113  {
1114  boost::ignore_unused(dir, input, output, wsp);
1115  ASSERTL0(false, "Not valid for this operator.");
1116  }

References ASSERTL0.

Member Data Documentation

◆ m_base0

Array<OneD, const NekDouble> Nektar::Collections::BwdTrans_SumFac_Prism::m_base0
protected

Definition at line 1133 of file BwdTrans.cpp.

◆ m_base1

Array<OneD, const NekDouble> Nektar::Collections::BwdTrans_SumFac_Prism::m_base1
protected

Definition at line 1134 of file BwdTrans.cpp.

◆ m_base2

Array<OneD, const NekDouble> Nektar::Collections::BwdTrans_SumFac_Prism::m_base2
protected

Definition at line 1135 of file BwdTrans.cpp.

◆ m_nmodes0

const int Nektar::Collections::BwdTrans_SumFac_Prism::m_nmodes0
protected

Definition at line 1130 of file BwdTrans.cpp.

◆ m_nmodes1

const int Nektar::Collections::BwdTrans_SumFac_Prism::m_nmodes1
protected

Definition at line 1131 of file BwdTrans.cpp.

◆ m_nmodes2

const int Nektar::Collections::BwdTrans_SumFac_Prism::m_nmodes2
protected

Definition at line 1132 of file BwdTrans.cpp.

◆ m_nquad0

const int Nektar::Collections::BwdTrans_SumFac_Prism::m_nquad0
protected

Definition at line 1127 of file BwdTrans.cpp.

◆ m_nquad1

const int Nektar::Collections::BwdTrans_SumFac_Prism::m_nquad1
protected

Definition at line 1128 of file BwdTrans.cpp.

◆ m_nquad2

const int Nektar::Collections::BwdTrans_SumFac_Prism::m_nquad2
protected

Definition at line 1129 of file BwdTrans.cpp.

◆ m_sortTopVertex

bool Nektar::Collections::BwdTrans_SumFac_Prism::m_sortTopVertex
protected

Definition at line 1136 of file BwdTrans.cpp.

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