isunordered() — Determine if either X or Y is unordered
Standards
Standards / Extensions | C or C++ | Dependencies |
---|---|---|
C99 |
both |
z/OS V1R8 |
Format
#define _ISOC99_SOURCE
#include <math.h>
int isunordered(real-floating x, real-floating y);
#define __STDC_WANT_DEC_FP__
#include <math.h>
int isunordered(real-floating x, real-floating y); /* C only */
int isunordered(decimal-floating x, decimal-floating y); /* C only */
bool isunordered(real-floating x, real-floating y); /* C++ only */
bool isunordered(decimal-floating x, decimal-floating y); /* C++ only */
#define _TR1_C99
#include <math.h>
bool isunordered(real-floating x, real-floating y); /* C++ only */
General description
The isunordered() macro or function template determines if either x or y is unordered, that is if x or y is a NaN.
Function | Hex | IEEE |
---|---|---|
isunordered | X | X |
Notes:
- To use IEEE decimal floating-point, the hardware must have the Decimal Floating-Point Facility installed.
- This function works in IEEE decimal floating-point format. See "IEEE Decimal Floating-Point" for more information.
Returned value
The isunordered() macro returns 1 if either x or y is unordered, else returns 0. The C++ function template returns true if either x or y is unordered, else returns false.
Special behavior in hex: The isunordered() macro always returns 0. The C++ function template always returns false.