bbr
#define bbr(v) ((bbr4[(v)&0xf] << 4) | bbr4[((v)>>4) & 0xf])
#define bbr(v) ((bbr4[(v) & 0xf] << 4) | bbr4[((v) >> 4) & 0xf])
#define bbr(v) ((bbr4[(v)&0xf] << 4) | bbr4[((v)>>4) & 0xf])
#define bbr(v) ((bbr4[(v)&0xf] << 4) | bbr4[((v)>>4) & 0xf])