IBucket *Pipeline::nextItem() {
while(1) {
if (buffer.empty()) {
#ifdef DEBUG
// It should not be possible to propagate more buckets
clearItems();
I(buffer.empty());
#endif
return 0;
}
if( ((buffer.top())->getClock() + PipeLength) > globalClock )
return 0;
IBucket *b = buffer.top();
buffer.pop();
I(!b->empty());
if (!b->cleanItem) {
I(!b->empty());
I(b->top() != 0);
return b;
}
I(b->cleanItem);
I(!b->empty());
I(b->top() == 0);
b->pop();
I(b->empty());
cleanBucketPool.push_back(b);
}
I(0);
}
void Processor::purgeInstructionWindow()
{
/* while(!pipeQ.instQueue.empty());
{
IBucket* bucket = pipeQ.instQueue.top();
while(!bucket->empty())
{
bucket->top()->killSilently();
bucket->pop();
}
// pipeQ.pipeLine.doneItem(bucket);
pipeQ.instQueue.pop();
}*/
while(pipeQ.pipeLine.hasOutstandingItems())
{
IBucket* bucket = pipeQ.pipeLine.nextItem();
while(!bucket->empty())
{
bucket->top()->killSilently();
bucket->pop();
}
pipeQ.pipeLine.doneItem(bucket);
}
pipeQ.pipeLine.clearItems();
}
int GProcessor::issue(PipeQueue &pipeQ)
{
int i=0; // Instructions executed counter
int j=0; // Fake Instructions counter
I(!pipeQ.instQueue.empty());
if(!replayQ.empty()) {
issueFromReplayQ();
nStall[ReplayStall]->add(RealisticWidth);
return 0; // we issued 0 from the instQ;
// FIXME:check if we can issue from replayQ and
// fetchQ during the same cycle
}
do{
IBucket *bucket = pipeQ.instQueue.top();
do{
I(!bucket->empty());
if( i >= IssueWidth ) {
return i+j;
}
I(!bucket->empty());
DInst *dinst = bucket->top();
#ifdef TASKSCALAR
if (!dinst->isFake()) {
if (dinst->getLVID()==0 || dinst->getLVID()->isKilled()) {
// Task got killed. Just swallow the instruction
dinst->killSilently();
bucket->pop();
j++;
continue;
}
}
#endif
StallCause c = addInst(dinst);
if (c != NoStall) {
if (i < RealisticWidth)
nStall[c]->add(RealisticWidth - i);
return i+j;
}
i++;
bucket->pop();
}while(!bucket->empty());
pipeQ.pipeLine.doneItem(bucket);
pipeQ.instQueue.pop();
}while(!pipeQ.instQueue.empty());
return i+j;
}
int32_t GProcessor::issue(PipeQueue &pipeQ)
{
int32_t i=0; // Instructions executed counter
int32_t j=0; // Fake Instructions counter
I(!pipeQ.instQueue.empty());
if(!replayQ.empty()) {
issueFromReplayQ();
nStall[ReplayStall]->add(RealisticWidth);
return 0; // we issued 0 from the instQ;
// FIXME:check if we can issue from replayQ and
// fetchQ during the same cycle
}
do {
IBucket *bucket = pipeQ.instQueue.top();
do {
I(!bucket->empty());
if( i >= IssueWidth ) {
return i+j;
}
I(!bucket->empty());
DInst *dinst = bucket->top();
StallCause c = addInst(dinst);
if (c != NoStall) {
if (i < RealisticWidth)
nStall[c]->add(RealisticWidth - i);
return i+j;
}
i++;
bucket->pop();
} while(!bucket->empty());
pipeQ.pipeLine.doneItem(bucket);
pipeQ.instQueue.pop();
} while(!pipeQ.instQueue.empty());
return i+j;
}