gf2_u8     T_UV
gf2_u16    T_UV
gf2_u32    T_UV
gf2_s8     T_IV
gf2_s16    T_IV
gf2_s32    T_IV

##</code><code>##

#include <limits.h>

#if USHRT_MAX > 0x80000000
typedef unsigned short gf2_u32;
#elif UINT_MAX > 0x80000000
typedef unsigned gf2_u32;
#else
typedef unsigned long gf2_u32;
#endif