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version 1.11, 2012/12/14 12:30:22
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*> \brief \b DLADIV 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 DLADIV + dependencies |
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dladiv.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/dladiv.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/dladiv.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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* SUBROUTINE DLADIV( A, B, C, D, P, Q ) |
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* |
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* .. Scalar Arguments .. |
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* DOUBLE PRECISION A, B, C, D, P, Q |
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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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*> DLADIV performs complex division in real arithmetic |
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*> |
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*> a + i*b |
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*> p + i*q = --------- |
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*> c + i*d |
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*> |
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*> The algorithm is due to Robert L. Smith and can be found |
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*> in D. Knuth, The art of Computer Programming, Vol.2, p.195 |
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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] A |
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*> \verbatim |
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*> A is DOUBLE PRECISION |
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*> \endverbatim |
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*> |
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*> \param[in] B |
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*> \verbatim |
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*> B is DOUBLE PRECISION |
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*> \endverbatim |
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*> |
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*> \param[in] C |
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*> \verbatim |
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*> C is DOUBLE PRECISION |
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*> \endverbatim |
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*> |
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*> \param[in] D |
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*> \verbatim |
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*> D is DOUBLE PRECISION |
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*> The scalars a, b, c, and d in the above expression. |
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*> \endverbatim |
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*> |
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*> \param[out] P |
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*> \verbatim |
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*> P is DOUBLE PRECISION |
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*> \endverbatim |
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*> |
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*> \param[out] Q |
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*> \verbatim |
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*> Q is DOUBLE PRECISION |
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*> The scalars p and q in the above expression. |
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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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*> \date September 2012 |
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* |
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*> \ingroup auxOTHERauxiliary |
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* |
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* ===================================================================== |
SUBROUTINE DLADIV( A, B, C, D, P, Q ) |
SUBROUTINE DLADIV( A, B, C, D, P, Q ) |
* |
* |
* -- LAPACK auxiliary routine (version 3.2) -- |
* -- LAPACK auxiliary routine (version 3.4.2) -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* November 2006 |
* September 2012 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
DOUBLE PRECISION A, B, C, D, P, Q |
DOUBLE PRECISION A, B, C, D, P, Q |
* .. |
* .. |
* |
* |
* Purpose |
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* ======= |
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* |
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* DLADIV performs complex division in real arithmetic |
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* |
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* a + i*b |
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* p + i*q = --------- |
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* c + i*d |
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* |
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* The algorithm is due to Robert L. Smith and can be found |
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* in D. Knuth, The art of Computer Programming, Vol.2, p.195 |
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* |
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* Arguments |
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* ========= |
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* |
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* A (input) DOUBLE PRECISION |
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* B (input) DOUBLE PRECISION |
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* C (input) DOUBLE PRECISION |
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* D (input) DOUBLE PRECISION |
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* The scalars a, b, c, and d in the above expression. |
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* |
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* P (output) DOUBLE PRECISION |
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* Q (output) DOUBLE PRECISION |
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* The scalars p and q in the above expression. |
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* |
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* ===================================================================== |
* ===================================================================== |
* |
* |
* .. Local Scalars .. |
* .. Local Scalars .. |