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

OSS Library Calls (a - d) cbrtl(3)
NAME
cbrtl - Computes the cube root of a long double 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>
long double cbrtl(
long double x);
PARAMETERS
x Is the long double value whose cube root is to be computed.
DESCRIPTION
The cbrtl( ) function is a long double version of the cbrt( ) function; it takes a long double argu-
ment and returns a long double result.
The cbrtl( ) function calculates the cube root of x.
The cbrtl( ) function can be called only by native processes.
NOTES
This function supports both IEEE Std 754-1985 floating-point and Tandem floating-point values.
IEEE values can include NaN and infinity, and the sign of 0 (zero) can be either positive or nega-
tive. 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
The cbrtl( ) function returns the cube root of the x parameter.
For IEEE floating-point values, if the value of x is NaN, the cbrtl( ) function returns NaN. If the
value of x is positive infinity, the cbrtl() function returns positive infinity. If the value of x is
negative infinity, the cbrtl() function returns negative infinity.
ERRORS
The cbrtl( ) function does not set errno.
RELATED INFORMATION
Functions: cbrt(3), cbrtf(3), fp_class(3).
STANDARDS CONFORMANCE
This function conforms to the ISO/IEC 9899:1999 standard.
This function conforms to the IEEE Std 1003.1, 2004 Edition.
527187-017 Hewlett-Packard Company 1−93