Open System Services Library Calls Reference Manual (G06.29+, H06.08+, J06.03+)

fabsf(3) OSS Library Calls Reference Manual
NAME
fabsf - Computes the floating-point absolute value function for a float 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 fabsf(
float x);
PARAMETERS
x Specifies the float value whose absolute value is to be computed.
DESCRIPTION
The fabsf( ) function is a float version of the fabs( ) function; it takes a float argument and returns
a float result.
The fabsf( ) function returns the absolute value of x, a floating-point number.
NOTES
This function supports both IEEE Std 754-1985 floating-point and Tandem floating-point values
in the native environment. IEEE values can include NaN and infinity, and the sign of 0.0 (zero)
can be either positive or negative. Refer to the fp_class(3) reference page for a description of
IEEE value classes.
Guardian functions are available to convert between floating-point formats. Refer to the Guar-
dian Programmer’s Guide for a discussion of floating-point conversions.
RETURN VALUES
Upon successful completion, the fabsf( ) function returns the absolute value of x.
For IEEE floating-point values, if the value of x is NaN, NaN is returned. If the value of x is
infinity, positive infinity is returned.
ERRORS
No error values are returned. This function does not set errno.
RELATED INFORMATION
Functions: abs(3), ceil(3), fabs(3), fabsl(3), floor(3), fmod(3), fp_class(3), isnan(3).
STANDARDS CONFORMANCE
This function conforms to the ISO/IEC 9899:1999 standard.
This function conforms to the IEEE Std 1003.1, 2004 Edition.
2−36 Hewlett-Packard Company 527187-017