slaisnan.f(3) LAPACK slaisnan.f(3)NAME
slaisnan.f -
SYNOPSIS
Functions/Subroutines
LOGICAL function slaisnan (SIN1, SIN2)
SLAISNAN tests input for NaN by comparing two arguments for
inequality.
Function/Subroutine Documentation
LOGICAL function slaisnan (realSIN1, realSIN2)
SLAISNAN 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 SISNAN.
SLAISNAN 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:
SIN1
SIN1 is REAL
SIN2
SIN2 is REAL
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 slaisnan.f.
Author
Generated automatically by Doxygen for LAPACK from the source code.
Version 3.4.2 Tue Sep 25 2012 slaisnan.f(3)
