RISC_SEMAPHORE
#define RISC_SEMAPHORE_WE (RISC_SEMAPHORE << 16)
#define RISC_SEMAPHORE_SET (RISC_SEMAPHORE_WE | RISC_SEMAPHORE)
if (wd32 & RISC_SEMAPHORE)
if (!(wd32 & RISC_SEMAPHORE))