SC
#define SC "sc "
#define SC 0xe0000000
#define SC(op, sa, lk) (OP (op) | ((((unsigned long)(sa)) & 1) << 1) | ((lk) & 1))
#define SC(name) SEND_CTXT_##name
#define SC(x) ((x) << 10)
SC = 0x00000004L,
#define SC (LC * NC)
#define SC (LC * NC)