#ifdef RD_WG_SIZE_0_0
    #define BLOCK_SIZE RD_WG_SIZE_0_0
#elif defined(RD_WG_SIZE_0)
    #define BLOCK_SIZE RD_WG_SIZE_0
#elif defined(RD_WG_SIZE)
    #define BLOCK_SIZE RD_WG_SIZE
#else
    #define BLOCK_SIZE 16
#endif
//#define TRACE
