R16
R15, R16,
R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R23 = 23,
#define R16 16
#define R16(_p, _m) in_be16(&(_p)->_m)
#define R16(_p, _m) __fs_in16(&(_p)->_m)
#define R16 16 * 8
#define R16 r16
#define R16 r16