lapacke_dbdsdc_work.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
lapack_int	LAPACKE_dbdsdc_work (int matrix_layout, char uplo, char compq, lapack_int n, double *d, double *e, double *u, lapack_int ldu, double *vt, lapack_int ldvt, double *q, lapack_int *iq, double *work, lapack_int *iwork)

Function Documentation

LAPACKE_dbdsdc_work()

lapack_int LAPACKE_dbdsdc_work	(	int	matrix_layout,
		char	uplo,
		char	compq,
		lapack_int	n,
		double *	d,
		double *	e,
		double *	u,
		lapack_int	ldu,
		double *	vt,
		lapack_int	ldvt,
		double *	q,
		lapack_int *	iq,
		double *	work,
		lapack_int *	iwork )

Definition at line 35 of file lapacke_dbdsdc_work.c.

{
    lapack_int info = 0;
    if( matrix_layout == LAPACK_COL_MAJOR ) {
        /* Call LAPACK function and adjust info */
        LAPACK_dbdsdc( &uplo, &compq, &n, d, e, u, &ldu, vt, &ldvt, q, iq, work,
                       iwork, &info );
        if( info < 0 ) {
            info = info - 1;
        }
    } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
        lapack_int ldu_t = MAX(1,n);
        lapack_int ldvt_t = MAX(1,n);
        double* u_t = NULL;
        double* vt_t = NULL;
        /* Check leading dimension(s) */
        if( ldu < n ) {
            info = -8;
            LAPACKE_xerbla( "LAPACKE_dbdsdc_work", info );
            return info;
        }
        if( ldvt < n ) {
            info = -10;
            LAPACKE_xerbla( "LAPACKE_dbdsdc_work", info );
            return info;
        }
        /* Allocate memory for temporary array(s) */
        if( LAPACKE_lsame( compq, 'i' ) ) {
            u_t = (double*)LAPACKE_malloc( sizeof(double) * ldu_t * MAX(1,n) );
            if( u_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_0;
            }
        }
        if( LAPACKE_lsame( compq, 'i' ) ) {
            vt_t = (double*)
                LAPACKE_malloc( sizeof(double) * ldvt_t * MAX(1,n) );
            if( vt_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_1;
            }
        }
        /* Call LAPACK function and adjust info */
        LAPACK_dbdsdc( &uplo, &compq, &n, d, e, u_t, &ldu_t, vt_t, &ldvt_t, q,
                       iq, work, iwork, &info );
        if( info < 0 ) {
            info = info - 1;
        }
        /* Transpose output matrices */
        if( LAPACKE_lsame( compq, 'i' ) ) {
            LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, u_t, ldu_t, u, ldu );
        }
        if( LAPACKE_lsame( compq, 'i' ) ) {
            LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, vt_t, ldvt_t, vt, ldvt );
        }
        /* Release memory and exit */
        if( LAPACKE_lsame( compq, 'i' ) ) {
            LAPACKE_free( vt_t );
        }
exit_level_1:
        if( LAPACKE_lsame( compq, 'i' ) ) {
            LAPACKE_free( u_t );
        }
exit_level_0:
        if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
            LAPACKE_xerbla( "LAPACKE_dbdsdc_work", info );
        }
    } else {
        info = -1;
        LAPACKE_xerbla( "LAPACKE_dbdsdc_work", info );
    }
    return info;
}