http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48602
--- Comment #12 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> 2011-04-16 16:10:40 UTC --- "If 0 < N < 0.1 − r × 10−d−1 or N ≥ 10d − r, or N is identically 0 and d is 0, Gw .d output editing is the same as k PEw .d output editing and Gw .d Ee output editing is the same as k PEw .d Ee output editing, where k is the scale factor (10.8.5)." I am looking at the above quoted from the standard.