GB
#define GB (1024*MB)
#undef GB
#define GB (1024*MB)
#define GB (1024*MB)
#define GB (1024L*MB)
#define GB(x) ((uint64_t)(x) * 1024 * 1024 * 1024)
#define GB(x) (MB (KB (x)))
#define GB(p,n,s) gf2k_get_bits(data, p, n, s)
#define GB(pos,num) sw_get_bits(buf, pos, num, sw->bits)
#define GB (1U << 30)
#define GB *(1U<<30)