lapack_sdpa.c File Reference

interface methods for eigenvector computation and matrix multiplication using openblas More...

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Macros
#define	SDPA_VERSION   738
#define	BMS_CALL(x)
#define	SCIP_RealTOINT(x)   ((LAPACKINTTYPE) (x + 0.5))

Typedefs
typedef long long int	LAPACKINTTYPE

Functions
Functions
SCIP_RETCODE	SCIPlapackComputeEigenvectorDecomposition (BMS_BUFMEM *bufmem, int n, SCIP_Real *A, SCIP_Real *eigenvalues, SCIP_Real *eigenvectors)
SCIP_RETCODE	SCIPlapackMatrixVectorMult (int nrows, int ncols, SCIP_Real *matrix, SCIP_Real *vector, SCIP_Real *result)
SCIP_RETCODE	SCIPlapackMatrixMatrixMult (int nrowsA, int ncolsA, SCIP_Real *matrixA, SCIP_Bool transposeA, int nrowsB, int ncolsB, SCIP_Real *matrixB, SCIP_Bool transposeB, SCIP_Real *result)

Detailed Description

interface methods for eigenvector computation and matrix multiplication using openblas

Author

Sonja Mars

Lars Schewe

Tristan Gally

Definition in file lapack_sdpa.c.

Macro Definition Documentation

#define SDPA_VERSION   738

Definition at line 56 of file lapack_sdpa.c.

#define BMS_CALL

(

x

)

Value:

do                                                                                      \
                      {                                                                                       \
                          if( NULL == (x) )                                                                   \
                          {                                                                                   \
                             SCIPerrorMessage("No memory in function call\n");                                \
                             return SCIP_NOMEMORY;                                                            \
                          }                                                                                   \
                      }                                                                                       \
                      while( FALSE )

Checks if a BMSallocMemory-call was successfull, otherwise returns SCIP_NOMEMORY

Definition at line 59 of file lapack_sdpa.c.

Referenced by SCIPlapackComputeEigenvectorDecomposition().

#define SCIP_RealTOINT

(

x

)

((LAPACKINTTYPE) (x + 0.5))

transforms a SCIP_Real (that should be integer, but might be off by some numerical error) to an integer by adding an epsilon and rounding down

Definition at line 70 of file lapack_sdpa.c.

Referenced by SCIPlapackComputeEigenvectorDecomposition().

Typedef Documentation

typedef long long int LAPACKINTTYPE

Definition at line 55 of file lapack_sdpa.c.

Function Documentation

SCIP_RETCODE SCIPlapackComputeEigenvectorDecomposition	(	BMS_BUFMEM *	bufmem,
		int	n,
		SCIP_Real *	A,
		SCIP_Real *	eigenvalues,
		SCIP_Real *	eigenvectors
	)

computes the eigenvector decomposition of a symmetric matrix using LAPACK

Parameters

bufmem	buffer memory
n	size of matrix
A	matrix for which the decomposition should be computed
eigenvalues	pointer to store eigenvalues (should be length n)
eigenvectors	pointer to store eigenvectors (should be length n*n), eigenvectors are given as rows

Definition at line 229 of file lapack_sdpa.c.

References BMS_CALL, F77_FUNC, and SCIP_RealTOINT.

Referenced by calcRelax().

SCIP_RETCODE SCIPlapackMatrixVectorMult	(	int	nrows,
		int	ncols,
		SCIP_Real *	matrix,
		SCIP_Real *	vector,
		SCIP_Real *	result
	)

performs matrix-vector-multiplication using BLAS

Parameters

nrows	number of rows in matrix
ncols	number of cols in matrix
matrix	the matrix we want to multiply
vector	vector we want to multiply with the matrix
result	pointer to store the resulting vector

Definition at line 332 of file lapack_sdpa.c.

References F77_FUNC.

Referenced by cutUsingEigenvector().

SCIP_RETCODE SCIPlapackMatrixMatrixMult	(	int	nrowsA,
		int	ncolsA,
		SCIP_Real *	matrixA,
		SCIP_Bool	transposeA,
		int	nrowsB,
		int	ncolsB,
		SCIP_Real *	matrixB,
		SCIP_Bool	transposeB,
		SCIP_Real *	result
	)

performs matrix-matrix-multiplication A*B using BLAS

Parameters

nrowsA	number of rows in matrix A
ncolsA	number of cols in matrix A
matrixA	matrix A given as nrowsA * ncolsA array
transposeA	should matrix A be transposed before multiplication?
nrowsB	number of rows in matrix B
ncolsB	number of cols in matrix B
matrixB	matrix B given as ncolsA * ncolsB array
transposeB	should matrix B be transposed before multiplication?
result	pointer to nrowsA * nrowsB array to store the resulting matrix

Definition at line 370 of file lapack_sdpa.c.

References F77_FUNC.

Referenced by calcRelax().