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Diffstat (limited to 'src/fortran/lapack/disnan.f')
| -rw-r--r-- | src/fortran/lapack/disnan.f | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/fortran/lapack/disnan.f b/src/fortran/lapack/disnan.f new file mode 100644 index 0000000..5200356 --- /dev/null +++ b/src/fortran/lapack/disnan.f @@ -0,0 +1,33 @@ + LOGICAL FUNCTION DISNAN(DIN) +* +* -- LAPACK auxiliary routine (version 3.1) -- +* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. +* November 2006 +* +* .. Scalar Arguments .. + DOUBLE PRECISION DIN +* .. +* +* Purpose +* ======= +* +* DISNAN returns .TRUE. if its argument is NaN, and .FALSE. +* otherwise. To be replaced by the Fortran 2003 intrinsic in the +* future. +* +* Arguments +* ========= +* +* DIN (input) DOUBLE PRECISION +* Input to test for NaN. +* +* ===================================================================== +* +* .. External Functions .. + LOGICAL DLAISNAN + EXTERNAL DLAISNAN +* .. +* .. Executable Statements .. + DISNAN = DLAISNAN(DIN,DIN) + RETURN + END |