LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
disnan.f
Go to the documentation of this file.
1 *> \brief \b DISNAN tests input for NaN.
2 *
3 * =========== DOCUMENTATION ===========
4 *
5 * Online html documentation available at
6 * http://www.netlib.org/lapack/explore-html/
7 *
8 *> \htmlonly
9 *> Download DISNAN + dependencies
10 *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/disnan.f">
11 *> [TGZ]</a>
12 *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/disnan.f">
13 *> [ZIP]</a>
14 *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/disnan.f">
15 *> [TXT]</a>
16 *> \endhtmlonly
17 *
18 * Definition:
19 * ===========
20 *
21 * LOGICAL FUNCTION DISNAN( DIN )
22 *
23 * .. Scalar Arguments ..
24 * DOUBLE PRECISION DIN
25 * ..
26 *
27 *
28 *> \par Purpose:
29 * =============
30 *>
31 *> \verbatim
32 *>
33 *> DISNAN returns .TRUE. if its argument is NaN, and .FALSE.
34 *> otherwise. To be replaced by the Fortran 2003 intrinsic in the
35 *> future.
36 *> \endverbatim
37 *
38 * Arguments:
39 * ==========
40 *
41 *> \param[in] DIN
42 *> \verbatim
43 *> DIN is DOUBLE PRECISION
44 *> Input to test for NaN.
45 *> \endverbatim
46 *
47 * Authors:
48 * ========
49 *
50 *> \author Univ. of Tennessee
51 *> \author Univ. of California Berkeley
52 *> \author Univ. of Colorado Denver
53 *> \author NAG Ltd.
54 *
55 *> \date September 2012
56 *
57 *> \ingroup auxOTHERauxiliary
58 *
59 * =====================================================================
60  LOGICAL FUNCTION disnan( DIN )
61 *
62 * -- LAPACK auxiliary routine (version 3.4.2) --
63 * -- LAPACK is a software package provided by Univ. of Tennessee, --
64 * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
65 * September 2012
66 *
67 * .. Scalar Arguments ..
68  DOUBLE PRECISION DIN
69 * ..
70 *
71 * =====================================================================
72 *
73 * .. External Functions ..
74  LOGICAL DLAISNAN
75  EXTERNAL dlaisnan
76 * ..
77 * .. Executable Statements ..
78  disnan = dlaisnan(din,din)
79  RETURN
80  END
disnan
logical function disnan(DIN)
DISNAN tests input for NaN.
Definition: disnan.f:61