slaisnan.f man page

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.

Referenced By

slaisnan(3) is an alias of slaisnan.f(3).

Sat Nov 16 2013 Version 3.4.2 LAPACK