ilogbd64(3M)															      ilogbd64(3M)

NAME

       ilogbd64(), ilogbd128(), ilogbd32() - decimal exponent functions

SYNOPSIS

DESCRIPTION

       The function computes the exponent of the floating point value x.  Formally, the return value is the integral part of log base 10 of |x| as
       a signed integer value, for nonzero x.

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

       is equivalent to for all values of x

       is a version of it takes a argument.

       is a version of it takes a argument.

       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 and raises the invalid floating-point exception.

       If x is zero, returns and raises the invalid floating-point exception.

       If x is NaN, returns and raises the invalid floating-point exception.

ERRORS

       If x is NaN, sets to

       If x is zero or infinite, sets to

SEE ALSO

       frexpd64(3M), logbd64(3M), scalbnd64(3M), scalblnd64(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						      ilogbd64(3M)