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Annotation of rpl/lapack/lapack/zladiv.f, revision 1.11

1.11    ! bertrand    1: *> \brief \b ZLADIV performs complex division in real arithmetic, avoiding unnecessary overflow.
1.8       bertrand    2: *
                      3: *  =========== DOCUMENTATION ===========
                      4: *
                      5: * Online html documentation available at 
                      6: *            http://www.netlib.org/lapack/explore-html/ 
                      7: *
                      8: *> \htmlonly
                      9: *> Download ZLADIV + dependencies 
                     10: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zladiv.f"> 
                     11: *> [TGZ]</a> 
                     12: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zladiv.f"> 
                     13: *> [ZIP]</a> 
                     14: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zladiv.f"> 
                     15: *> [TXT]</a>
                     16: *> \endhtmlonly 
                     17: *
                     18: *  Definition:
                     19: *  ===========
                     20: *
                     21: *       COMPLEX*16     FUNCTION ZLADIV( X, Y )
                     22: * 
                     23: *       .. Scalar Arguments ..
                     24: *       COMPLEX*16         X, Y
                     25: *       ..
                     26: *  
                     27: *
                     28: *> \par Purpose:
                     29: *  =============
                     30: *>
                     31: *> \verbatim
                     32: *>
                     33: *> ZLADIV := X / Y, where X and Y are complex.  The computation of X / Y
                     34: *> will not overflow on an intermediary step unless the results
                     35: *> overflows.
                     36: *> \endverbatim
                     37: *
                     38: *  Arguments:
                     39: *  ==========
                     40: *
                     41: *> \param[in] X
                     42: *> \verbatim
                     43: *>          X is COMPLEX*16
                     44: *> \endverbatim
                     45: *>
                     46: *> \param[in] Y
                     47: *> \verbatim
                     48: *>          Y is COMPLEX*16
                     49: *>          The complex scalars X and Y.
                     50: *> \endverbatim
                     51: *
                     52: *  Authors:
                     53: *  ========
                     54: *
                     55: *> \author Univ. of Tennessee 
                     56: *> \author Univ. of California Berkeley 
                     57: *> \author Univ. of Colorado Denver 
                     58: *> \author NAG Ltd. 
                     59: *
1.11    ! bertrand   60: *> \date September 2012
1.8       bertrand   61: *
                     62: *> \ingroup complex16OTHERauxiliary
                     63: *
                     64: *  =====================================================================
1.1       bertrand   65:       COMPLEX*16     FUNCTION ZLADIV( X, Y )
                     66: *
1.11    ! bertrand   67: *  -- LAPACK auxiliary routine (version 3.4.2) --
1.1       bertrand   68: *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
                     69: *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
1.11    ! bertrand   70: *     September 2012
1.1       bertrand   71: *
                     72: *     .. Scalar Arguments ..
                     73:       COMPLEX*16         X, Y
                     74: *     ..
                     75: *
                     76: *  =====================================================================
                     77: *
                     78: *     .. Local Scalars ..
                     79:       DOUBLE PRECISION   ZI, ZR
                     80: *     ..
                     81: *     .. External Subroutines ..
                     82:       EXTERNAL           DLADIV
                     83: *     ..
                     84: *     .. Intrinsic Functions ..
                     85:       INTRINSIC          DBLE, DCMPLX, DIMAG
                     86: *     ..
                     87: *     .. Executable Statements ..
                     88: *
                     89:       CALL DLADIV( DBLE( X ), DIMAG( X ), DBLE( Y ), DIMAG( Y ), ZR,
                     90:      $             ZI )
                     91:       ZLADIV = DCMPLX( ZR, ZI )
                     92: *
                     93:       RETURN
                     94: *
                     95: *     End of ZLADIV
                     96: *
                     97:       END