roundd64.3m (2010 09)

r
roundd64(3M) roundd64(3M)
(HP Integrity Server Only)
NAME
roundd64(), roundd128(), roundd32() - decimal round functions
SYNOPSIS
#define __STDC_WANT_DEC_FP__
#include <math.h>
_Decimal64 roundd64(_Decimal64 x);
_Decimal128 roundd128(_Decimal128 x);
_Decimal32 roundd32(_Decimal32 x);
DESCRIPTION
The roundd64() function rounds its argument to the nearest integral value (represented as a
_Decimal64 number). An argument exactly halfway between two integers is rounded away from zero.
roundd64() is independent of the rounding direction mode.
roundd128() is a _Decimal128 version of roundd64()
; it takes a _Decimal128 argument and
returns a
_Decimal128 result.
roundd32() is a _Decimal32 version of roundd64()
; it takes a _Decimal32 argument and
returns a
_Decimal32 result.
These math functions are supported for HP-UX 11i Version 3 September 2008 Update and forward.
USAGE
To use any of these functions, compile with the +decfp option.
Make sure your program defines
__STDC_WANT_DEC_FP__
and then includes <math.h>.
Link in the math library by specifying
-lm or -l:libm.a on the linking command line.
For more information, see the HP-UX floating-point guide for HP Integrity servers at the following site:
http://www.hp.com/go/fp
.
RETURN VALUE
If x is ±infinity or ±0,
roundd64() returns x.
If x is NaN,
roundd64() returns NaN.
ERRORS
No errors are defined.
SEE ALSO
ceild64(3M), floord64(3M), fmodd64(3M), llroundd64(3M), lroundd64(3M), rintd64(3M), truncd64(3M),
math(5).
STANDARDS CONFORMANCE
These functions conform to ISO/IEC TR 24732, "Extension for the programming language C to support
decimal floating-point arithmetic".
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1