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78 lines
1.9 KiB
78 lines
1.9 KiB
2 years ago
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*> \brief \b SISNAN tests input for NaN.
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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 SISNAN + dependencies
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/sisnan.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/sisnan.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/sisnan.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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* LOGICAL FUNCTION SISNAN( SIN )
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*
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* .. Scalar Arguments ..
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* REAL, INTENT(IN) :: SIN
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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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*> SISNAN returns .TRUE. if its argument is NaN, and .FALSE.
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*> otherwise. To be replaced by the Fortran 2003 intrinsic in the
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*> future.
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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] SIN
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*> \verbatim
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*> SIN is REAL
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*> Input to test for NaN.
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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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*> \ingroup OTHERauxiliary
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*
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* =====================================================================
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LOGICAL FUNCTION SISNAN( SIN )
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*
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* -- LAPACK auxiliary routine --
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* -- LAPACK is a software package provided by Univ. of Tennessee, --
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* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
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*
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* .. Scalar Arguments ..
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REAL, INTENT(IN) :: SIN
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* ..
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*
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* =====================================================================
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*
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* .. External Functions ..
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LOGICAL SLAISNAN
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EXTERNAL SLAISNAN
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* ..
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* .. Executable Statements ..
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SISNAN = SLAISNAN(SIN,SIN)
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RETURN
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END
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