95 lines
2.3 KiB
Fortran
95 lines
2.3 KiB
Fortran
*> \brief \b CLADIV performs complex division in real arithmetic, avoiding unnecessary overflow.
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*
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* =========== DOCUMENTATION ===========
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*
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* Online html documentation available at
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* http://www.netlib.org/lapack/explore-html/
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*
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*> \htmlonly
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*> Download CLADIV + dependencies
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/cladiv.f">
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*> [TGZ]</a>
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/cladiv.f">
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*> [ZIP]</a>
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/cladiv.f">
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*> [TXT]</a>
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*> \endhtmlonly
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*
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* Definition:
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* ===========
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*
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* COMPLEX FUNCTION CLADIV( X, Y )
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*
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* .. Scalar Arguments ..
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* COMPLEX X, Y
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* ..
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*
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*
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*> \par Purpose:
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* =============
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*>
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*> \verbatim
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*>
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*> CLADIV := X / Y, where X and Y are complex. The computation of X / Y
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*> will not overflow on an intermediary step unless the results
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*> overflows.
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*> \endverbatim
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*
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* Arguments:
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* ==========
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*
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*> \param[in] X
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*> \verbatim
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*> X is COMPLEX
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*> \endverbatim
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*>
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*> \param[in] Y
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*> \verbatim
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*> Y is COMPLEX
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*> The complex scalars X and Y.
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*> \endverbatim
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*
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* Authors:
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* ========
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*
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*> \author Univ. of Tennessee
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*> \author Univ. of California Berkeley
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*> \author Univ. of Colorado Denver
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*> \author NAG Ltd.
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*
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*> \ingroup complexOTHERauxiliary
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*
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* =====================================================================
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COMPLEX FUNCTION CLADIV( X, Y )
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*
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* -- LAPACK auxiliary routine --
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* -- LAPACK is a software package provided by Univ. of Tennessee, --
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* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
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*
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* .. Scalar Arguments ..
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COMPLEX X, Y
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* ..
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*
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* =====================================================================
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*
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* .. Local Scalars ..
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REAL ZI, ZR
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* ..
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* .. External Subroutines ..
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EXTERNAL SLADIV
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* ..
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* .. Intrinsic Functions ..
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INTRINSIC AIMAG, CMPLX, REAL
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* ..
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* .. Executable Statements ..
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*
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CALL SLADIV( REAL( X ), AIMAG( X ), REAL( Y ), AIMAG( Y ), ZR,
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$ ZI )
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CLADIV = CMPLX( ZR, ZI )
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*
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RETURN
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*
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* End of CLADIV
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*
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END
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