FDIM(3) OpenBSD Programmer's Manual FDIM(3)NAME
fdim, fdimf, fdiml - positive difference functions
SYNOPSIS
#include <math.h>
double
fdim(double x, double y);
float
fdimf(float x, float y);
long double
fdiml(long double x, long double y);
DESCRIPTION
The fdim(), fdimf(), and fdiml() functions return the positive difference
between x and y. That is, if x-y is positive, then x-y is returned. If
either x or y is an NaN, then an NaN is returned. Otherwise, the result
is +0.0.
Overflow or underflow may occur if the exact result is not representable
in the return type. No other exceptions are raised.
SEE ALSOfabs(3), fmax(3), fmin(3), math(3)STANDARDS
The fdim(), fdimf(), and fdiml() functions conform to ISO/IEC 9899:1999
(``ISO C99'').
HISTORY
These routines first appeared in OpenBSD 4.5.
OpenBSD 4.9 October 26, 2009 OpenBSD 4.9