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logbd64(3M)							   logbd64(3M)

NAME
       logbd64(), logbd128(), logbd32() - decimal exponent functions

SYNOPSIS
DESCRIPTION
       The function computes the exponent of the floating point value x.  For‐
       mally, the return value is the integral part of log base 10 of |x| as a
       signed floating point value, for nonzero x.

       If  x  is subnormal, it is treated as though it were normalized, before
       the exponent is determined.

       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
       If x returns +infinity.

       If  x  is  0, returns −infinity and raises the divide-by-zero floating-
       point exception.

       If x is NaN, returns NaN.

ERRORS
       If x is 0, sets to

SEE ALSO
       frexpd64(3M), ilogbd64(3M), scalbnd64(3M), scalblnd64(3M), math(5).

STANDARDS CONFORMANCE
       These functions conform to ISO/IEC TR 24732, "Extension	for  the  pro‐
       gramming language C to support decimal floating-point arithmetic".

			   HP Integrity Server Only		   logbd64(3M)

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