34 lines
766 B
FortranFixed
34 lines
766 B
FortranFixed
FUNCTION DISNAN( DIN )
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LOGICAL DISNAN
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*
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* -- LAPACK auxiliary routine (version 3.1) --
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* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
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* November 2006
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*
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* .. Scalar Arguments ..
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DOUBLE PRECISION DIN
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* ..
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*
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* Purpose
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* =======
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*
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* DISNAN 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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*
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* Arguments
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* =========
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*
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* DIN (input) DOUBLE PRECISION
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* Input to test for NaN.
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*
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* =====================================================================
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*
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* .. External Functions ..
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LOGICAL DLAISNAN
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EXTERNAL DLAISNAN
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* ..
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* .. Executable Statements ..
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DISNAN = DLAISNAN( DIN, DIN )
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END FUNCTION
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