SLAORD sorts the elements of a vector x in increasing or decreasing
 order.

JOB

          JOB is CHARACTER
          = 'I':  Sort in increasing order
          = 'D':  Sort in decreasing order

N

          N is INTEGER
          The length of the vector X.

X

          X is REAL array, dimension
                         (1+(N-1)*INCX)
          On entry, the vector of length n to be sorted.
          On exit, the vector x is sorted in the prescribed order.

INCX

          INCX is INTEGER
          The spacing between successive elements of X.  INCX >= 0.

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