lapacke_dsbtrd.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
lapack_int	LAPACKE_dsbtrd (int matrix_layout, char vect, char uplo, lapack_int n, lapack_int kd, double *ab, lapack_int ldab, double *d, double *e, double *q, lapack_int ldq)

Function Documentation

LAPACKE_dsbtrd()

lapack_int LAPACKE_dsbtrd	(	int	matrix_layout,
		char	vect,
		char	uplo,
		lapack_int	n,
		lapack_int	kd,
		double *	ab,
		lapack_int	ldab,
		double *	d,
		double *	e,
		double *	q,
		lapack_int	ldq )

Definition at line 35 of file lapacke_dsbtrd.c.

{
    lapack_int info = 0;
    double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dsbtrd", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_dsb_nancheck( matrix_layout, uplo, n, kd, ab, ldab ) ) {
            return -6;
        }
        if( LAPACKE_lsame( vect, 'u' ) ) {
            if( LAPACKE_dge_nancheck( matrix_layout, n, n, q, ldq ) ) {
                return -10;
            }
        }
    }
#endif
    /* Allocate memory for working array(s) */
    work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_dsbtrd_work( matrix_layout, vect, uplo, n, kd, ab, ldab, d, e,
                                q, ldq, work );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dsbtrd", info );
    }
    return info;
}