lapacke_dggbal_work.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
lapack_int	LAPACKE_dggbal_work (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, double *work)

Function Documentation

LAPACKE_dggbal_work()

lapack_int LAPACKE_dggbal_work	(	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,
		double *	work )

Definition at line 35 of file lapacke_dggbal_work.c.

{
    lapack_int info = 0;
    if( matrix_layout == LAPACK_COL_MAJOR ) {
        /* Call LAPACK function and adjust info */
        LAPACK_dggbal( &job, &n, a, &lda, b, &ldb, ilo, ihi, lscale, rscale,
                       work, &info );
        if( info < 0 ) {
            info = info - 1;
        }
    } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
        lapack_int lda_t = MAX(1,n);
        lapack_int ldb_t = MAX(1,n);
        double* a_t = NULL;
        double* b_t = NULL;
        /* Check leading dimension(s) */
        if( lda < n ) {
            info = -5;
            LAPACKE_xerbla( "LAPACKE_dggbal_work", info );
            return info;
        }
        if( ldb < n ) {
            info = -7;
            LAPACKE_xerbla( "LAPACKE_dggbal_work", info );
            return info;
        }
        /* Allocate memory for temporary array(s) */
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
            if( a_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_0;
            }
        }
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,n) );
            if( b_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_1;
            }
        }
        /* Transpose input matrices */
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            LAPACKE_dge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
        }
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            LAPACKE_dge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
        }
        /* Call LAPACK function and adjust info */
        LAPACK_dggbal( &job, &n, a_t, &lda_t, b_t, &ldb_t, ilo, ihi, lscale,
                       rscale, work, &info );
        if( info < 0 ) {
            info = info - 1;
        }
        /* Transpose output matrices */
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
        }
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
        }
        /* Release memory and exit */
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            LAPACKE_free( b_t );
        }
exit_level_1:
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            LAPACKE_free( a_t );
        }
exit_level_0:
        if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
            LAPACKE_xerbla( "LAPACKE_dggbal_work", info );
        }
    } else {
        info = -1;
        LAPACKE_xerbla( "LAPACKE_dggbal_work", info );
    }
    return info;
}