nextafter(3) BSD Library Functions Manual nextafter(3)
NAME
nextafter
SYNOPSIS
#include <math.h>
double
nextafter(double x, double y);
long double
nextafterl(long double x, long double y);
float
nextafterf(float x, float y);
DESCRIPTION
The nextafter() functions return the next machine representable number
from x in direction y.
SPECIAL VALUES
nextafter(x, y) raises the "overflow" and "inexact" floating-point excep-
tions for x finite and the function value infinite.
nextafter(x, y) raises the "underflow" and "inexact" floating-point
exceptions for the function value subnormal or zero and x not equal to y.
VECTOR OPERATIONS
If you need to apply the nextafter() functions to SIMD vectors or arrays,
using the following functions provided by the Accelerate.framework may
give significantly better performance:
#include <Accelerate/Accelerate.h>
vFloat vnextafterf(vFloat x, vFloat y);
void vvnextafterf(float *z, const float *y, const float *x, const int
*n);
void vvnextafter(double *z, const double *y, const double *x, const int
*n);
SEE ALSO
math(3)
STANDARDS
The nextafter() functions conform to ISO/IEC 9899:2011.
BSD December 11, 2006 BSD
Mac OS X 10.9.1 - Generated Wed Jan 8 20:44:03 CST 2014