word0
#define word0(x) ((ULong *)x)[1]
#define word0(x) ((ULong *)x)[0]
#define word0(x) ( /* LINTED */ (U*)x)->L[1]
#define word0(x) ( /* LINTED */ (U*)x)->L[0]
if (inexact && !(word0(&rv) & Exp_mask)) {
#define word0(x) (x)->L[1]
#define word0(x) (x)->L[0]