root / src / lapack / double / disnan.f @ 10
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LOGICAL FUNCTION DISNAN( DIN ) |
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* |
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* -- LAPACK auxiliary routine (version 3.2.2) -- |
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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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* June 2010 |
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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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RETURN |
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END |