70   ULong *x, *xe;  in increment()  local
77   xe = x + b->wds;  in increment()
85     } while(x < xe);  in increment()
93     } while(x < xe);  in increment()
113   ULong *x, *xe;  in decrement()  local
119   xe = x + b->wds;  in decrement()
128     while(x < xe);  in decrement()
134     } while(borrow && x < xe);  in decrement()
142   CONST ULong *x, *xe;  in all_on()  local
145   xe = x + ((unsigned int)n >> kshift);  in all_on()
146   while(x < xe)  in all_on()
158   ULong *x, *xe;  in set_ones()  local
172   xe = x + k;  in set_ones()
173   while(x < xe)  in set_ones()