SMALLBIN_SHIFT    444 lj_alloc.c     #define SMALLBIN_WIDTH		(SIZE_T_ONE << SMALLBIN_SHIFT)
SMALLBIN_SHIFT    523 lj_alloc.c     #define is_small(s)		(((s) >> SMALLBIN_SHIFT) < NSMALLBINS)
SMALLBIN_SHIFT    524 lj_alloc.c     #define small_index(s)		((s)  >> SMALLBIN_SHIFT)
SMALLBIN_SHIFT    525 lj_alloc.c     #define small_index2size(i)	((i)  << SMALLBIN_SHIFT)