double2ieee - Convert floating-point number from /390 format to IEEE format (BS2000)

Syntax	#include <ieee_390.h> double double2ieee (double num);
Description	double2ieee() converts an 8-byte floating-point number num in /390 format to IEEE format and returns it as the result. Neither overflow nor underflow can occur, but up to three bit positions can be lost.
Return val.	8-byte floating-point number in IEEE format (if successful). The global variable float_exceptions_flag contains information for the event of unsuccessful conversion and is defined as follows: extern int float_exception_flags; enum { float_flag_inexact = 1, float_flag_divbyzero = 2, float_flag_underflow = 4, float_flag_overflow = 8, float_flag_invalid = 16 }; If bit positions are lost during conversion and the result is thus inaccurate, float_flag_inexact is set.
See also	ieee2double(), float2ieee(), ieee2float().