s having
          elements with magnitude less than or equal to PMAX.
          If JOBY = 'N', this array is not referenced.

  LDY     INTEGER
          The leading dimension of the array Y.
          LDY &gt;= 1,        if JOBY = 'N';
          LDY &gt;= MAX(1,N), if JOBY = 'U'.

  NBLCKS  (output) INTEGER
          The number of diagonal blocks of the matrices A and B.

  BLSIZE  (output) INTEGER array, dimension (N)
          The first NBLCKS elements of this array contain the orders
          of the r