coshd64.3m (2010 09)

c
coshd64(3M) coshd64(3M)
(HP Integrity Server Only)
NAME
coshd64(), coshd128(), coshd32() - decimal hyperbolic cosine functions
SYNOPSIS
#define __STDC_WANT_DEC_FP__
#include <math.h>
_Decimal64 coshd64(_Decimal64 x);
_Decimal128 coshd128(_Decimal128 x);
_Decimal32 coshd32(_Decimal32 x);
DESCRIPTION
coshd64() returns the hyperbolic cosine of x.
coshd128() is a _Decimal128 version of coshd64(); it takes a
_Decimal128 argument and
returns a
_Decimal128 result.
coshd32() is a _Decimal32 version of coshd64(); 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
coshd64(±0) returns 1.
If x is ±infinity,
coshd64() returns +infinity.
If x is NaN,
coshd64() returns NaN.
coshd64() returns +infinity (or, in some non-default rounding direction modes, the maximum finite
number) in lieu of a value whose magnitude is too large, and raises the overflow and inexact exceptions.
coshd64() raises the inexact exception whenever a rounded result does not equal the mathematical
result.
ERRORS
If the correct value would overflow,
coshd64() sets errno to [ERANGE].
SEE ALSO
acoshd64(3M), asinhd64(3M), atanhd64(3M), sinhd64(3M), tanhd64(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