#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