lgammad64(3M)															     lgammad64(3M)

NAME

       lgammad64(), lgammad128(), lgammad32() - decimal log gamma functions

SYNOPSIS

DESCRIPTION

       returns , where is defined as the integral, as t goes from zero to infinity, of times t to the power (x-1).

       The sign of is returned in the external integer

       is not reentrant because it uses the global variable

       The function can be used to calculate

       is a version of it takes a argument and returns a result.

       is a version of it takes a argument and returns a 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 option.

       Make sure your program defines and then includes

       Link in the math library by specifying or on the linking command line.

       For more information, see the at the following site:

RETURN VALUE

       returns +0.

       returns +0.

       returns +infinity and raises the divide-by-zero floating-point exception for x a negative integer or zero.

       If x returns +infinity.

       If x is NaN, returns NaN.

       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.

       raises the inexact exception whenever a rounded result does not equal the mathematical result.

ERRORS

       If x is a negative integer or zero, sets to

       If the correct value would overflow, sets to

SEE ALSO

       expd64(3M), logd64(3M), tgammad64(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 Integrity Server Only						     lgammad64(3M)