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version 1.19, 2018/05/29 07:17:56
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LOGICAL FUNCTION DLAISNAN(DIN1,DIN2) |
*> \brief \b DLAISNAN tests input for NaN by comparing two arguments for inequality. |
* |
* |
* -- LAPACK auxiliary routine (version 3.2) -- |
* =========== 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 DLAISNAN + dependencies |
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlaisnan.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/dlaisnan.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/dlaisnan.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 DLAISNAN( DIN1, DIN2 ) |
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* |
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* .. Scalar Arguments .. |
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* DOUBLE PRECISION, INTENT(IN) :: DIN1, DIN2 |
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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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*> This routine is not for general use. It exists solely to avoid |
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*> over-optimization in DISNAN. |
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*> |
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*> DLAISNAN checks for NaNs by comparing its two arguments for |
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*> inequality. NaN is the only floating-point value where NaN != NaN |
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*> returns .TRUE. To check for NaNs, pass the same variable as both |
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*> arguments. |
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*> |
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*> A compiler must assume that the two arguments are |
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*> not the same variable, and the test will not be optimized away. |
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*> Interprocedural or whole-program optimization may delete this |
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*> test. The ISNAN functions will be replaced by the correct |
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*> Fortran 03 intrinsic once the intrinsic is widely available. |
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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] DIN1 |
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*> \verbatim |
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*> DIN1 is DOUBLE PRECISION |
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*> \endverbatim |
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*> |
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*> \param[in] DIN2 |
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*> \verbatim |
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*> DIN2 is DOUBLE PRECISION |
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*> Two numbers to compare for inequality. |
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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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*> \date June 2017 |
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* |
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*> \ingroup OTHERauxiliary |
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* |
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* ===================================================================== |
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LOGICAL FUNCTION DLAISNAN( DIN1, DIN2 ) |
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* |
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* -- LAPACK auxiliary routine (version 3.7.1) -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* November 2006 |
* June 2017 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
DOUBLE PRECISION DIN1,DIN2 |
DOUBLE PRECISION, INTENT(IN) :: DIN1, DIN2 |
* .. |
* .. |
* |
* |
* Purpose |
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* ======= |
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* |
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* This routine is not for general use. It exists solely to avoid |
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* over-optimization in DISNAN. |
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* |
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* DLAISNAN checks for NaNs by comparing its two arguments for |
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* inequality. NaN is the only floating-point value where NaN != NaN |
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* returns .TRUE. To check for NaNs, pass the same variable as both |
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* arguments. |
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* |
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* A compiler must assume that the two arguments are |
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* not the same variable, and the test will not be optimized away. |
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* Interprocedural or whole-program optimization may delete this |
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* test. The ISNAN functions will be replaced by the correct |
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* Fortran 03 intrinsic once the intrinsic is widely available. |
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* |
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* Arguments |
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* ========= |
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* |
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* DIN1 (input) DOUBLE PRECISION |
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* DIN2 (input) DOUBLE PRECISION |
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* Two numbers to compare for inequality. |
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* |
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* ===================================================================== |
* ===================================================================== |
* |
* |
* .. Executable Statements .. |
* .. Executable Statements .. |