cladiv.f

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*> \brief \b CLADIV performs complex division in real arithmetic, avoiding unnecessary overflow.
*
*  =========== DOCUMENTATION ===========
*
* Online html documentation available at
*            http://www.netlib.org/lapack/explore-html/
*
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*> \endhtmlonly
*
*  Definition:
*  ===========
*
*       COMPLEX FUNCTION CLADIV( X, Y )
*
*       .. Scalar Arguments ..
*       COMPLEX            X, Y
*       ..
*
*
*> \par Purpose:
*  =============
*>
*> \verbatim
*>
*> CLADIV := X / Y, where X and Y are complex.  The computation of X / Y
*> will not overflow on an intermediary step unless the results
*> overflows.
*> \endverbatim
*
*  Arguments:
*  ==========
*
*> \param[in] X
*> \verbatim
*>          X is COMPLEX
*> \endverbatim
*>
*> \param[in] Y
*> \verbatim
*>          Y is COMPLEX
*>          The complex scalars X and Y.
*> \endverbatim
*
*  Authors:
*  ========
*
*> \author Univ. of Tennessee
*> \author Univ. of California Berkeley
*> \author Univ. of Colorado Denver
*> \author NAG Ltd.
*
*> \ingroup complexOTHERauxiliary
*
*  =====================================================================
      COMPLEX FUNCTION cladiv( X, Y )
*
*  -- LAPACK auxiliary routine --
*  -- LAPACK is a software package provided by Univ. of Tennessee,    --
*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
*
*     .. Scalar Arguments ..
      COMPLEX            x, y
*     ..
*
*  =====================================================================
*
*     .. Local Scalars ..
      REAL               zi, zr
*     ..
*     .. External Subroutines ..
      EXTERNAL           sladiv
*     ..
*     .. Intrinsic Functions ..
      INTRINSIC          aimag, cmplx, real
*     ..
*     .. Executable Statements ..
*
      CALL sladiv( real( x ), aimag( x ), real( y ), aimag( y ), zr,
     $             zi )
      cladiv = cmplx( zr, zi )
*
      RETURN
*
*     End of CLADIV
*
      END