#define ALPHA           (8)
#define SIZE            (1 << ALPHA)
#define MASK            (SIZE - 1)
#define ind(x)          ((x) & (SIZE - 1))
#define barrel(a)       (((a) << 20) ^ ((a) >> 12))  /* beta=32,shift=20 */

struct ibaa_state {
        uint32_t        IBAA_memory[SIZE];
        uint32_t        IBAA_results[SIZE];
        uint32_t        IBAA_aa;
        uint32_t        IBAA_bb;
        uint32_t        IBAA_counter;
        int             IBAA_byte_index;
        int             memIndex;
};

#define L15_STATE_SIZE  256

struct l15_state {
        uint8_t         L15_x;
        uint8_t         L15_y;
        uint8_t         L15_start_x;
        uint8_t         L15_state[L15_STATE_SIZE];
        uint8_t         stateIndex;
};