public void ID()
throws RAWException, IrregularWriteOperationException, IrregularStringOfBitsException {
// if source registers are valid passing their own values into temporary registers
Register rs = cpu.getRegister(params.get(RS_FIELD));
Register rt = cpu.getRegister(params.get(RT_FIELD));
if (rs.getWriteSemaphore() > 0 || rt.getWriteSemaphore() > 0) {
throw new RAWException();
}
TR[RS_FIELD] = rs;
TR[RT_FIELD] = rt;
// locking the destination registers (quotient and remainder)
cpu.getLO().incrWriteSemaphore();
cpu.getHI().incrWriteSemaphore();
}
public void doWB() throws IrregularStringOfBitsException {
// passing results from temporary registers to destination registers and unlocking them
Register lo = cpu.getLO();
Register hi = cpu.getHI();
lo.setBits(TR[LO_REG].getBinString(), 0);
hi.setBits(TR[HI_REG].getBinString(), 0);
lo.decrWriteSemaphore();
hi.decrWriteSemaphore();
}
