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dladiv

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

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

          DOUBLE         PRECISION A, B, C, D, P, Q

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

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

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