int res_latency, InOrderCPU *_cpu,
ThePipeline::Params *params)
: CacheUnit(res_name, res_id, res_width, res_latency, _cpu, params),
- instSize(sizeof(TheISA::MachInst)), fetchBuffSize(params->fetchBuffSize),
- predecoder(NULL)
-{ }
+ instSize(sizeof(TheISA::MachInst)), fetchBuffSize(params->fetchBuffSize)
+{
+ for (int tid = 0; tid < MaxThreads; tid++)
+ predecoder[tid] = new Predecoder(NULL);
+}
FetchUnit::~FetchUnit()
{
MachInst mach_inst =
TheISA::gtoh(fetchInsts[fetch_offset]);
- predecoder.setTC(cpu->thread[tid]->getTC());
- predecoder.moreBytes(instPC, inst->instAddr(), mach_inst);
- assert(predecoder.extMachInstReady());
- ext_inst = predecoder.getExtMachInst(instPC);
+ predecoder[tid]->setTC(cpu->thread[tid]->getTC());
+ predecoder[tid]->moreBytes(instPC, inst->instAddr(), mach_inst);
+ assert(predecoder[tid]->extMachInstReady());
+ ext_inst = predecoder[tid]->getExtMachInst(instPC);
inst->pcState(instPC);
inst->setMachInst(ext_inst);
return cnt;
}
+void
+FetchUnit::clearFetchBuffer()
+{
+ std::list<FetchBlock*>::iterator fetch_it = fetchBuffer.begin();
+ std::list<FetchBlock*>::iterator end_it = fetchBuffer.end();
+
+ while (fetch_it != end_it) {
+ if ((*fetch_it)->block) {
+ delete [] (*fetch_it)->block;
+ }
+ delete *fetch_it;
+ fetch_it++;
+ }
+ fetchBuffer.clear();
+}
+
void
FetchUnit::execute(int slot_num)
{
FetchUnit::trap(Fault fault, ThreadID tid, DynInstPtr inst)
{
//@todo: per thread?
- predecoder.reset();
+ predecoder[tid]->reset();
+
+ //@todo: squash using dummy inst seq num
+ squash(NULL, NumStages - 1, 0, tid);
+
+ //@todo: make sure no blocks are in use
+ assert(blocksInUse() == 0);
+ assert(pendingFetch.size() == 0);
+
+ //@todo: clear pendingFetch and fetchBuffer
+ clearFetchBuffer();
}