array Q is
                              provided in packed storage mode.
          BPAR(6) = .TRUE.  : If BPAR(5) = .FALSE., the matrix
                              returned in array Q is stored in upper
                              packed mode (see above).
                              Otherwise, this entry is ignored.
          BPAR(6) = .FALSE. : If BPAR(5) = .FALSE., the matrix
                              returned in array Q is stored in lower
                              packed mode (see above).
