acosd64.3m (2010 09)

a
acosd64(3M) acosd64(3M)
(HP Integrity Server Only)
NAME
acosd64(), acosd128(), acosd32() - decimal arccosine functions
SYNOPSIS
#define __STDC_WANT_DEC_FP__
#include <math.h>
_Decimal64 acosd64(_Decimal64 x);
_Decimal128 acosd128(_Decimal128 x);
_Decimal32 acosd32(_Decimal32 x);
DESCRIPTION
acosd64() returns the arccosine of x, in the range 0 to π.
acosd128() is a _Decimal128 version of acosd64(); it takes a
_Decimal128 argument and
returns a
_Decimal128 result.
acosd32() is a _Decimal32 version of acosd64(); 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 the magnitude of x is greater than 1,
acosd64() returns NaN and raises the invalid exception.
If x is NaN,
acosd64() returns NaN.
acosd64() raises the inexact exception whenever a rounded result does not equal the mathematical
result.
ERRORS
If the magnitude of x is greater than 1,
acosd64() sets errno to [EDOM].
SEE ALSO
asind64(3M), atan2d64(3M), atand64(3M), cosd64(3M), sind64(3M), tand64(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