isunordered man page on SunOS

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isunordered(3M)		Mathematical Library Functions	       isunordered(3M)

NAME
       isunordered - test if arguments are unordered

SYNOPSIS
       c99 [ flag... ] file... -lm [ library... ]
       #include <math.h>

       int isunordered(real-floating x, real-floating y);

DESCRIPTION
       The isunordered() macro determines whether its arguments are unordered.

RETURN VALUES
       Upon  successful	 completion,  the isunordered() macro returns 1 if its
       arguments are unordered and 0 otherwise.

ERRORS
       No errors are defined.

USAGE
       The relational and equality operators support  the  usual  mathematical
       relationships  between  numeric values. For any ordered pair of numeric
       values, exactly one of the relationships (less, greater, and equal)  is
       true.  Relational operators can raise the invalid floating-point excep‐
       tion when argument values are NaNs. For a NaN and a numeric  value,  or
       for  two NaNs, just the unordered relationship is true. This macro is a
       quiet (non-floating-point exception raising) version  of	 a  relational
       operator. It facilitates writing efficient code that accounts for quiet
       NaNs without suffering the invalid  floating-point  exception.  In  the
       SYNOPSIS section, real-floating indicates that the argument shall be an
       expression of real-floating type.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       ┌─────────────────────────────┬─────────────────────────────┐
       │      ATTRIBUTE TYPE	     │	    ATTRIBUTE VALUE	   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Interface Stability	     │Standard			   │
       ├─────────────────────────────┼─────────────────────────────┤
       │MT-Level		     │MT-Safe			   │
       └─────────────────────────────┴─────────────────────────────┘

SEE ALSO
       isgreater(3M), isgreaterequal(3M), isless(3M), islessequal(3M), isless‐
       greater(3M), math.h(3HEAD), attributes(5), standards(5)

SunOS 5.10			  12 Jul 2006		       isunordered(3M)
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