Guardian Native C Library Calls Reference Manual (G06.29+, H06.08+, J06.03+)

nearbyintf(3) Guardian Native C Library Calls Reference Manual
NAME
nearbyintf - Rounds float number to nearest integral value
LIBRARY
H-series and J-series native Guardian processes: $SYSTEM.ZDLLnnn.ZCREDLL
32-bit H-series and J-series OSS processes: /G/system/zdllnnn/zcredll
64-bit H-series and J-series OSS processes: /G/system/zdllnnn/ycredll
SYNOPSIS
#include <math.h>
float nearbyintf(
float x);
PARAMETERS
x Is the float value to be rounded.
DESCRIPTION
The nearbyintf() function is a float version of the nearbyint( ) function; it takes a float argument
and returns a float result.
The nearbyintf() function returns the integral value (as a float) nearest the value of the x param-
eter in the direction of the current rounding mode but does not raise the inexact floating-point
exception.
NOTES
This function is implemented only for the IEEE_float floating-point option. Applications using
this function cannot be compiled if the specified floating-point option is Tandem_float.
RETURN VALUES
On successful completion, the nearbyintf() function returns the integral value (as a float) nearest
the value of the x parameter in the direction of the current rounding mode.
If the value of x is NaN, the function returns NaN.
If the value of x is positive or negative zero, the function returns positive or negative zero.
If the value of x is positive or negative infinity, the function returns the value of x.
If the correct value would cause overflow, the function returns HUGE_VALF (with the same
sign as x) and sets errno to [ERANGE].
ERRORS
If the following condition exists, the nearbyintf() function sets errno to the corresponding
value:
[ERANGE] The result would cause overflow.
RELATED INFORMATION
Functions: ceil(3), fabs(3), fegetround(3), fesetround(3), floor(3), fmod(3), lrint(3), llrint(3),
lround(3), llround(3), nearbyint(3), nearbyintl(3), rint(3), round(3), trunc(3).
Files: math(4).
STANDARDS CONFORMANCE
This function conforms to the ISO/IEC 9899:1999 standard.
This function conforms to the IEEE Std 1003.1, 2004 Edition.
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