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Epetra_BLAS Class Reference

Epetra_BLAS: The Epetra BLAS Wrapper Class. More...

#include <Epetra_BLAS.h>

Inheritance diagram for Epetra_BLAS:
Inheritance graph
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Constructors/Destructor

 Epetra_BLAS (void)
 Epetra_BLAS Constructor. More...
 
 Epetra_BLAS (const Epetra_BLAS &BLAS)
 Epetra_BLAS Copy Constructor. More...
 
virtual ~Epetra_BLAS (void)
 Epetra_BLAS Destructor. More...
 

Level 1 BLAS

float ASUM (const int N, const float *X, const int INCX=1) const
 Epetra_BLAS one norm function (SASUM). More...
 
double ASUM (const int N, const double *X, const int INCX=1) const
 Epetra_BLAS one norm function (DASUM). More...
 
float DOT (const int N, const float *X, const float *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS dot product function (SDOT). More...
 
double DOT (const int N, const double *X, const double *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS dot product function (DDOT). More...
 
float NRM2 (const int N, const float *X, const int INCX=1) const
 Epetra_BLAS norm function (SNRM2). More...
 
double NRM2 (const int N, const double *X, const int INCX=1) const
 Epetra_BLAS norm function (DNRM2). More...
 
void SCAL (const int N, const float ALPHA, float *X, const int INCX=1) const
 Epetra_BLAS vector scale function (SSCAL) More...
 
void SCAL (const int N, const double ALPHA, double *X, const int INCX=1) const
 Epetra_BLAS vector scale function (DSCAL) More...
 
void COPY (const int N, const float *X, float *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS vector copy function (SCOPY) More...
 
void COPY (const int N, const double *X, double *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS vector scale function (DCOPY) More...
 
int IAMAX (const int N, const float *X, const int INCX=1) const
 Epetra_BLAS arg maximum of absolute value function (ISAMAX) More...
 
int IAMAX (const int N, const double *X, const int INCX=1) const
 Epetra_BLAS arg maximum of absolute value function (IDAMAX) More...
 
void AXPY (const int N, const float ALPHA, const float *X, float *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS vector update function (SAXPY) More...
 
void AXPY (const int N, const double ALPHA, const double *X, double *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS vector update function (DAXPY) More...
 

Level 2 BLAS

void GEMV (const char TRANS, const int M, const int N, const float ALPHA, const float *A, const int LDA, const float *X, const float BETA, float *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS matrix-vector multiply function (SGEMV) More...
 
void GEMV (const char TRANS, const int M, const int N, const double ALPHA, const double *A, const int LDA, const double *X, const double BETA, double *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS matrix-vector multiply function (DGEMV) More...
 

Level 3 BLAS

void GEMM (const char TRANSA, const char TRANSB, const int M, const int N, const int K, const float ALPHA, const float *A, const int LDA, const float *B, const int LDB, const float BETA, float *C, const int LDC) const
 Epetra_BLAS matrix-matrix multiply function (SGEMM) More...
 
void GEMM (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) const
 Epetra_BLAS matrix-matrix multiply function (DGEMM) More...
 
void SYMM (const char SIDE, const char UPLO, const int M, const int N, const float ALPHA, const float *A, const int LDA, const float *B, const int LDB, const float BETA, float *C, const int LDC) const
 Epetra_BLAS symmetric matrix-matrix multiply function (SSYMM) More...
 
void SYMM (const char SIDE, const char UPLO, const int M, const int N, const double ALPHA, const double *A, const int LDA, const double *B, const int LDB, const double BETA, double *C, const int LDC) const
 Epetra_BLAS matrix-matrix multiply function (DSYMM) More...
 
void TRMM (const char SIDE, const char UPLO, const char TRANSA, const char DIAG, const int M, const int N, const float ALPHA, const float *A, const int LDA, float *B, const int LDB) const
 Epetra_BLAS triangular matrix-matrix multiply function (STRMM) More...
 
void TRMM (const char SIDE, const char UPLO, const char TRANSA, const char DIAG, const int M, const int N, const double ALPHA, const double *A, const int LDA, double *B, const int LDB) const
 Epetra_BLAS triangular matrix-matrix multiply function (DTRMM) More...
 
void SYRK (const char UPLO, const char TRANS, const int N, const int K, const float ALPHA, const float *A, const int LDA, const float BETA, float *C, const int LDC) const
 Eperta_BLAS symetric rank k funtion (ssyrk) More...
 
void SYRK (const char UPLO, const char TRANS, const int N, const int K, const double ALPHA, const double *A, const int LDA, const double BETA, double *C, const int LDC) const
 Eperta_BLAS symetric rank k funtion (dsyrk) More...
 

Detailed Description

Epetra_BLAS: The Epetra BLAS Wrapper Class.

The Epetra_BLAS class is a wrapper that encapsulates the BLAS (Basic Linear Algebra Subprograms). The BLAS provide portable, high- performance implementations of kernels such as dense vectoer multiplication, dot products, dense matrix-vector multiplication and dense matrix-matrix multiplication.

The standard BLAS interface is Fortran-specific. Unfortunately, the interface between C++ and Fortran is not standard across all computer platforms. The Epetra_BLAS class provides C++ wrappers for the BLAS kernels in order to insulate the rest of Epetra from the details of C++ to Fortran translation. A Epetra_BLAS object is essentially nothing, but allows access to the BLAS wrapper functions.

Epetra_BLAS is a serial interface only. This is appropriate since the standard BLAS are only specified for serial execution (or shared memory parallel).

Definition at line 78 of file Epetra_BLAS.h.

Constructor & Destructor Documentation

Epetra_BLAS::Epetra_BLAS ( void  )
inline

Epetra_BLAS Constructor.

Builds an instance of a serial BLAS object.

Definition at line 187 of file Epetra_BLAS.h.

Epetra_BLAS::Epetra_BLAS ( const Epetra_BLAS &  BLAS)
inline

Epetra_BLAS Copy Constructor.

Makes an exact copy of an existing Epetra_BLAS instance.

Definition at line 189 of file Epetra_BLAS.h.

Epetra_BLAS::~Epetra_BLAS ( void  )
inlinevirtual

Epetra_BLAS Destructor.

Definition at line 191 of file Epetra_BLAS.h.

Member Function Documentation

float Epetra_BLAS::ASUM ( const int  N,
const float *  X,
const int  INCX = 1 
) const

Epetra_BLAS one norm function (SASUM).

Definition at line 65 of file Epetra_BLAS.cpp.

double Epetra_BLAS::ASUM ( const int  N,
const double *  X,
const int  INCX = 1 
) const

Epetra_BLAS one norm function (DASUM).

Definition at line 69 of file Epetra_BLAS.cpp.

float Epetra_BLAS::DOT ( const int  N,
const float *  X,
const float *  Y,
const int  INCX = 1,
const int  INCY = 1 
) const

Epetra_BLAS dot product function (SDOT).

Definition at line 73 of file Epetra_BLAS.cpp.

double Epetra_BLAS::DOT ( const int  N,
const double *  X,
const double *  Y,
const int  INCX = 1,
const int  INCY = 1 
) const

Epetra_BLAS dot product function (DDOT).

Definition at line 77 of file Epetra_BLAS.cpp.

float Epetra_BLAS::NRM2 ( const int  N,
const float *  X,
const int  INCX = 1 
) const

Epetra_BLAS norm function (SNRM2).

Definition at line 81 of file Epetra_BLAS.cpp.

double Epetra_BLAS::NRM2 ( const int  N,
const double *  X,
const int  INCX = 1 
) const

Epetra_BLAS norm function (DNRM2).

Definition at line 85 of file Epetra_BLAS.cpp.

void Epetra_BLAS::SCAL ( const int  N,
const float  ALPHA,
float *  X,
const int  INCX = 1 
) const

Epetra_BLAS vector scale function (SSCAL)

Definition at line 89 of file Epetra_BLAS.cpp.

void Epetra_BLAS::SCAL ( const int  N,
const double  ALPHA,
double *  X,
const int  INCX = 1 
) const

Epetra_BLAS vector scale function (DSCAL)

Definition at line 94 of file Epetra_BLAS.cpp.

void Epetra_BLAS::COPY ( const int  N,
const float *  X,
float *  Y,
const int  INCX = 1,
const int  INCY = 1 
) const

Epetra_BLAS vector copy function (SCOPY)

Definition at line 99 of file Epetra_BLAS.cpp.

void Epetra_BLAS::COPY ( const int  N,
const double *  X,
double *  Y,
const int  INCX = 1,
const int  INCY = 1 
) const

Epetra_BLAS vector scale function (DCOPY)

Definition at line 104 of file Epetra_BLAS.cpp.

int Epetra_BLAS::IAMAX ( const int  N,
const float *  X,
const int  INCX = 1 
) const

Epetra_BLAS arg maximum of absolute value function (ISAMAX)

Definition at line 109 of file Epetra_BLAS.cpp.

int Epetra_BLAS::IAMAX ( const int  N,
const double *  X,
const int  INCX = 1 
) const

Epetra_BLAS arg maximum of absolute value function (IDAMAX)

Definition at line 113 of file Epetra_BLAS.cpp.

void Epetra_BLAS::AXPY ( const int  N,
const float  ALPHA,
const float *  X,
float *  Y,
const int  INCX = 1,
const int  INCY = 1 
) const

Epetra_BLAS vector update function (SAXPY)

Definition at line 117 of file Epetra_BLAS.cpp.

void Epetra_BLAS::AXPY ( const int  N,
const double  ALPHA,
const double *  X,
double *  Y,
const int  INCX = 1,
const int  INCY = 1 
) const

Epetra_BLAS vector update function (DAXPY)

Definition at line 121 of file Epetra_BLAS.cpp.

void Epetra_BLAS::GEMV ( const char  TRANS,
const int  M,
const int  N,
const float  ALPHA,
const float *  A,
const int  LDA,
const float *  X,
const float  BETA,
float *  Y,
const int  INCX = 1,
const int  INCY = 1 
) const

Epetra_BLAS matrix-vector multiply function (SGEMV)

Definition at line 125 of file Epetra_BLAS.cpp.

void Epetra_BLAS::GEMV ( const char  TRANS,
const int  M,
const int  N,
const double  ALPHA,
const double *  A,
const int  LDA,
const double *  X,
const double  BETA,
double *  Y,
const int  INCX = 1,
const int  INCY = 1 
) const

Epetra_BLAS matrix-vector multiply function (DGEMV)

Definition at line 132 of file Epetra_BLAS.cpp.

void Epetra_BLAS::GEMM ( const char  TRANSA,
const char  TRANSB,
const int  M,
const int  N,
const int  K,
const float  ALPHA,
const float *  A,
const int  LDA,
const float *  B,
const int  LDB,
const float  BETA,
float *  C,
const int  LDC 
) const

Epetra_BLAS matrix-matrix multiply function (SGEMM)

Definition at line 140 of file Epetra_BLAS.cpp.

void Epetra_BLAS::GEMM ( 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 
) const

Epetra_BLAS matrix-matrix multiply function (DGEMM)

Definition at line 149 of file Epetra_BLAS.cpp.

void Epetra_BLAS::SYMM ( const char  SIDE,
const char  UPLO,
const int  M,
const int  N,
const float  ALPHA,
const float *  A,
const int  LDA,
const float *  B,
const int  LDB,
const float  BETA,
float *  C,
const int  LDC 
) const

Epetra_BLAS symmetric matrix-matrix multiply function (SSYMM)

Definition at line 157 of file Epetra_BLAS.cpp.

void Epetra_BLAS::SYMM ( const char  SIDE,
const char  UPLO,
const int  M,
const int  N,
const double  ALPHA,
const double *  A,
const int  LDA,
const double *  B,
const int  LDB,
const double  BETA,
double *  C,
const int  LDC 
) const

Epetra_BLAS matrix-matrix multiply function (DSYMM)

Definition at line 166 of file Epetra_BLAS.cpp.

void Epetra_BLAS::TRMM ( const char  SIDE,
const char  UPLO,
const char  TRANSA,
const char  DIAG,
const int  M,
const int  N,
const float  ALPHA,
const float *  A,
const int  LDA,
float *  B,
const int  LDB 
) const

Epetra_BLAS triangular matrix-matrix multiply function (STRMM)

Definition at line 174 of file Epetra_BLAS.cpp.

void Epetra_BLAS::TRMM ( const char  SIDE,
const char  UPLO,
const char  TRANSA,
const char  DIAG,
const int  M,
const int  N,
const double  ALPHA,
const double *  A,
const int  LDA,
double *  B,
const int  LDB 
) const

Epetra_BLAS triangular matrix-matrix multiply function (DTRMM)

Definition at line 182 of file Epetra_BLAS.cpp.

void Epetra_BLAS::SYRK ( const char  UPLO,
const char  TRANS,
const int  N,
const int  K,
const float  ALPHA,
const float *  A,
const int  LDA,
const float  BETA,
float *  C,
const int  LDC 
) const

Eperta_BLAS symetric rank k funtion (ssyrk)

Definition at line 190 of file Epetra_BLAS.cpp.

void Epetra_BLAS::SYRK ( const char  UPLO,
const char  TRANS,
const int  N,
const int  K,
const double  ALPHA,
const double *  A,
const int  LDA,
const double  BETA,
double *  C,
const int  LDC 
) const

Eperta_BLAS symetric rank k funtion (dsyrk)

Definition at line 195 of file Epetra_BLAS.cpp.

The documentation for this class was generated from the following files:
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