lapacke_dggbal.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
lapack_int	LAPACKE_dggbal (int matrix_layout, char job, lapack_int n, double *a, lapack_int lda, double *b, lapack_int ldb, lapack_int *ilo, lapack_int *ihi, double *lscale, double *rscale)

Function Documentation

LAPACKE_dggbal()

lapack_int LAPACKE_dggbal	(	int	matrix_layout,
		char	job,
		lapack_int	n,
		double *	a,
		lapack_int	lda,
		double *	b,
		lapack_int	ldb,
		lapack_int *	ilo,
		lapack_int *	ihi,
		double *	lscale,
		double *	rscale )

Definition at line 35 of file lapacke_dggbal.c.

{
    lapack_int info = 0;
    /* Additional scalars declarations for work arrays */
    lapack_int lwork;
    double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dggbal", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            if( LAPACKE_dge_nancheck( matrix_layout, n, n, a, lda ) ) {
                return -4;
            }
        }
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            if( LAPACKE_dge_nancheck( matrix_layout, n, n, b, ldb ) ) {
                return -6;
            }
        }
    }
#endif
    /* Additional scalars initializations for work arrays */
    if( LAPACKE_lsame( job, 's' ) || LAPACKE_lsame( job, 'b' ) ) {
        lwork = MAX(1,6*n);
    } else {
        lwork = 1;
    }
    /* Allocate memory for working array(s) */
    work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_dggbal_work( matrix_layout, job, n, a, lda, b, ldb, ilo, ihi,
                                lscale, rscale, work );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dggbal", info );
    }
    return info;
}