LAPACK  3.10.1 LAPACK: Linear Algebra PACKage
sisnan.f
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1 *> \brief \b SISNAN tests input for NaN.
2 *
3 * =========== DOCUMENTATION ===========
4 *
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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 OTHERauxiliary
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