lapacke_dbdsqr.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
lapack_int	LAPACKE_dbdsqr (int matrix_layout, char uplo, lapack_int n, lapack_int ncvt, lapack_int nru, lapack_int ncc, double *d, double *e, double *vt, lapack_int ldvt, double *u, lapack_int ldu, double *c, lapack_int ldc)

Function Documentation

LAPACKE_dbdsqr()

lapack_int LAPACKE_dbdsqr	(	int	matrix_layout,
		char	uplo,
		lapack_int	n,
		lapack_int	ncvt,
		lapack_int	nru,
		lapack_int	ncc,
		double *	d,
		double *	e,
		double *	vt,
		lapack_int	ldvt,
		double *	u,
		lapack_int	ldu,
		double *	c,
		lapack_int	ldc )

Definition at line 35 of file lapacke_dbdsqr.c.

{
    lapack_int info = 0;
    double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dbdsqr", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( ncc != 0 ) {
            if( LAPACKE_dge_nancheck( matrix_layout, n, ncc, c, ldc ) ) {
                return -13;
            }
        }
        if( LAPACKE_d_nancheck( n, d, 1 ) ) {
            return -7;
        }
        if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
            return -8;
        }
        if( nru != 0 ) {
            if( LAPACKE_dge_nancheck( matrix_layout, nru, n, u, ldu ) ) {
                return -11;
            }
        }
        if( ncvt != 0 ) {
            if( LAPACKE_dge_nancheck( matrix_layout, n, ncvt, vt, ldvt ) ) {
                return -9;
            }
        }
    }
#endif
    /* Allocate memory for working array(s) */
    work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,4*n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_dbdsqr_work( matrix_layout, uplo, n, ncvt, nru, ncc, d, e, vt,
                                ldvt, u, ldu, c, ldc, work );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dbdsqr", info );
    }
    return info;
}