diff options
Diffstat (limited to 'src/cpu/inorder/resources/graduation_unit.cc')
| -rw-r--r-- | src/cpu/inorder/resources/graduation_unit.cc | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/src/cpu/inorder/resources/graduation_unit.cc b/src/cpu/inorder/resources/graduation_unit.cc index 8ccdaa36a..edc2fb3ff 100644 --- a/src/cpu/inorder/resources/graduation_unit.cc +++ b/src/cpu/inorder/resources/graduation_unit.cc @@ -37,8 +37,7 @@ GraduationUnit::GraduationUnit(std::string res_name, int res_id, int res_width, int res_latency, InOrderCPU *_cpu, ThePipeline::Params *params) : Resource(res_name, res_id, res_width, res_latency, _cpu), - lastCycleGrad(0), numCycleGrad(0) - + lastNonSpecTick(0) { for (ThreadID tid = 0; tid < ThePipeline::MaxThreads; tid++) { nonSpecInstActive[tid] = &cpu->nonSpecInstActive[tid]; @@ -49,23 +48,27 @@ GraduationUnit::GraduationUnit(std::string res_name, int res_id, int res_width, void GraduationUnit::execute(int slot_num) { - ResourceRequest* grad_req = reqMap[slot_num]; - DynInstPtr inst = reqMap[slot_num]->inst; + ResourceRequest* grad_req = reqs[slot_num]; + DynInstPtr inst = reqs[slot_num]->inst; ThreadID tid = inst->readTid(); - int stage_num = inst->resSched.top()->stageNum; + int stage_num = inst->curSkedEntry->stageNum; switch (grad_req->cmd) { case GraduateInst: { - // Make sure this is the last thing on the resource schedule - assert(inst->resSched.size() == 1); + if (lastNonSpecTick == curTick()) { + DPRINTF(InOrderGraduation, "Unable to graduate [sn:%i]. " + "Only 1 nonspec inst. per cycle can graduate.\n"); + grad_req->done(false); + return; + } - // Handle Any Faults Before Graduating Instruction + // Handle Any Faults Before Graduating Instruction if (inst->fault != NoFault) { cpu->trap(inst->fault, tid, inst); grad_req->setCompleted(false); - return; + return; } DPRINTF(InOrderGraduation, @@ -80,6 +83,7 @@ GraduationUnit::execute(int slot_num) DPRINTF(InOrderGraduation, "[tid:%i] Non-speculative inst [sn:%i] graduated\n", tid, inst->seqNum); + lastNonSpecTick = curTick(); } if (inst->traceData) { |