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sladiv

 NAME
      SLADIV - perform complex division in real arithmetic   a +
      i*b  p + i*q = ---------  c + i*d  The algorithm is due to
      Robert L

 SYNOPSIS
      SUBROUTINE SLADIV( A, B, C, D, P, Q )

          REAL           A, B, C, D, P, Q

 PURPOSE
      SLADIV performs complex division in  real arithmetic in D.
      Knuth, The art of Computer Programming, Vol.2, p.195

 ARGUMENTS
      A       (input) REAL
              B       (input) REAL C       (input) REAL D
              (input) REAL The scalars a, b, c, and d in the above
              expression.

      P       (output) REAL
              Q       (output) REAL The scalars p and q in the
              above expression.