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

floorl(3) OSS Library Calls Reference Manual
NAME
floorl - Rounds long double numbers to long double integers
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 floorl(
long double x);
PARAMETERS
x Specifies the long double value to be rounded.
DESCRIPTION
The floorl( ) function is a long double version of the floor( ) function; it takes a long double argu-
ment and returns a long double result.
The floorl( ) function returns the largest floating-point integer not greater than the x parameter.
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 floorl( ) function returns the largest integral value not greater
than x.
For IEEE floating-point values, if the value of x is NaN, NaN is returned. If the value of x is
positive infinity, positive infinity is returned. If the value of x is negative infinity, negative
infinity is returned.
ERRORS
No error values are returned. This function does not set errno.
RELATED INFORMATION
Functions: abs(3), ceil(3), fabs(3), floor(3), floorf(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.
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