__swap16gen_x      55 sys/endian.h   	__uint16_t __swap16gen_x = (x);					\
__swap16gen_x      57 sys/endian.h   	(__uint16_t)((__swap16gen_x & 0xff) << 8 |			\
__swap16gen_x      58 sys/endian.h   	    (__swap16gen_x & 0xff00) >> 8);				\