lapack_int LAPACKE_dsbevd	(	int	matrix_layout,
		char	jobz,
		char	uplo,
		lapack_int	n,
		lapack_int	kd,
		double *	ab,
		lapack_int	ldab,
		double *	w,
		double *	z,
		lapack_int	ldz
	)

Definition at line 36 of file lapacke_dsbevd.c.

{
    lapack_int info = 0;
    lapack_int liwork = -1;
    lapack_int lwork = -1;
    lapack_int* iwork = NULL;
    double* work = NULL;
    lapack_int iwork_query;
    double work_query;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dsbevd", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* Optionally check input matrices for NaNs */
    if( LAPACKE_dsb_nancheck( matrix_layout, uplo, n, kd, ab, ldab ) ) {
        return -6;
    }
#endif
    /* Query optimal working array(s) size */
    info = LAPACKE_dsbevd_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
                                ldz, &work_query, lwork, &iwork_query, liwork );
    if( info != 0 ) {
        goto exit_level_0;
    }
    liwork = (lapack_int)iwork_query;
    lwork = (lapack_int)work_query;
    /* Allocate memory for work arrays */
    iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
    if( iwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_dsbevd_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
                                ldz, work, lwork, iwork, liwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_1:
    LAPACKE_free( iwork );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dsbevd", info );
    }
    return info;
}

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