OS_SUPPORT_NONE
if (f->os_support == OS_SUPPORT_NONE) {
if (f->os_support != OS_SUPPORT_NONE) {
f->os_support = OS_SUPPORT_NONE;
if (f->os_support == OS_SUPPORT_NONE && f->fscr_bit_nr != -1) {
if (f->os_support != OS_SUPPORT_NONE || f->fscr_bit_nr != -1) {