disnan.f(3) LAPACK disnan.f(3)NAME
disnan.f -
SYNOPSIS
Functions/Subroutines
LOGICAL function disnan (DIN)
DISNAN
Function/Subroutine Documentation
LOGICAL function disnan (double precisionDIN)
DISNAN
Purpose:
DISNAN returns .TRUE. if its argument is NaN, and .FALSE.
otherwise. To be replaced by the Fortran 2003 intrinsic in the
future.
Parameters:
DIN
DIN is DOUBLE PRECISION
Input to test for NaN.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
November 2011
Definition at line 60 of file disnan.f.
Author
Generated automatically by Doxygen for LAPACK from the source code.
Version 3.4.1 Sun May 26 2013 disnan.f(3)
Check Out this Related Man Page
dlaisnan.f(3) LAPACK dlaisnan.f(3)NAME
dlaisnan.f -
SYNOPSIS
Functions/Subroutines
LOGICAL function dlaisnan (DIN1, DIN2)
DLAISNAN tests input for NaN by comparing two arguments for inequality.
Function/Subroutine Documentation
LOGICAL function dlaisnan (double precisionDIN1, double precisionDIN2)
DLAISNAN tests input for NaN by comparing two arguments for inequality.
Purpose:
This routine is not for general use. It exists solely to avoid
over-optimization in DISNAN.
DLAISNAN checks for NaNs by comparing its two arguments for
inequality. NaN is the only floating-point value where NaN != NaN
returns .TRUE. To check for NaNs, pass the same variable as both
arguments.
A compiler must assume that the two arguments are
not the same variable, and the test will not be optimized away.
Interprocedural or whole-program optimization may delete this
test. The ISNAN functions will be replaced by the correct
Fortran 03 intrinsic once the intrinsic is widely available.
Parameters:
DIN1
DIN1 is DOUBLE PRECISION
DIN2
DIN2 is DOUBLE PRECISION
Two numbers to compare for inequality.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
September 2012
Definition at line 75 of file dlaisnan.f.
Author
Generated automatically by Doxygen for LAPACK from the source code.
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