LAPACK 3.12.0 LAPACK: Linear Algebra PACKage
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sisnan.f
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1*> \brief \b SISNAN 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
10*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/sisnan.f">
11*> [TGZ]</a>
12*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/sisnan.f">
13*> [ZIP]</a>
14*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/sisnan.f">
15*> [TXT]</a>
16*> \endhtmlonly
17*
18* Definition:
19* ===========
20*
21* LOGICAL FUNCTION SISNAN( SIN )
22*
23* .. Scalar Arguments ..
24* REAL, INTENT(IN) :: SIN
25* ..
26*
27*
28*> \par Purpose:
29* =============
30*>
31*> \verbatim
32*>
33*> SISNAN 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] SIN
42*> \verbatim
43*> SIN is REAL
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*> \ingroup isnan
56*
57* =====================================================================
58 LOGICAL FUNCTION sisnan( SIN )
59*
60* -- LAPACK auxiliary routine --
61* -- LAPACK is a software package provided by Univ. of Tennessee, --
62* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
63*
64* .. Scalar Arguments ..
65 REAL, INTENT(IN) :: sin
66* ..
67*
68* =====================================================================
69*
70* .. External Functions ..
71 LOGICAL slaisnan
72 EXTERNAL slaisnan
73* ..
74* .. Executable Statements ..
75 sisnan = slaisnan(sin,sin)
76 RETURN
77 END
logical function sisnan(sin)
SISNAN tests input for NaN.
Definition sisnan.f:59
logical function slaisnan(x, y)
Definition la_xisnan.F90:28