the results when JOBB = 'G' and
          JOBL = 'N'.

  SCAL    CHARACTER*1
          If JOBB = 'B', specifies whether or not a scaling strategy
          should be used to scale Q, R, and L, as follows:
          = 'G':  General scaling should be used;
          = 'N':  No scaling should be used.
          SCAL is not used if JOBB = 'G'.

  SORT    CHARACTER*1
          Specifies which eigenvalues should be obtained in the top
          of the generalized Schur form, as follows:
          = 'S':  Stable  