diff options
| -rw-r--r-- | src/cpu/inorder/resources/mult_div_unit.cc | 34 | ||||
| -rw-r--r-- | src/cpu/inorder/resources/mult_div_unit.hh | 2 |
2 files changed, 34 insertions, 2 deletions
diff --git a/src/cpu/inorder/resources/mult_div_unit.cc b/src/cpu/inorder/resources/mult_div_unit.cc index 7592c0260..e7bd6750f 100644 --- a/src/cpu/inorder/resources/mult_div_unit.cc +++ b/src/cpu/inorder/resources/mult_div_unit.cc @@ -91,7 +91,32 @@ MultDivUnit::freeSlot(int slot_idx) Resource::freeSlot(slot_idx); } - +//@TODO: Should we push this behavior into base-class to generically +// accomodate all multicyle resources? +void +MultDivUnit::requestAgain(DynInstPtr inst, bool &service_request) +{ + ResReqPtr mult_div_req = findRequest(inst); + assert(mult_div_req); + + service_request = true; + + // Check to see if this instruction is requesting the same command + // or a different one + if (mult_div_req->cmd != inst->resSched.top()->cmd) { + // If different, then update command in the request + mult_div_req->cmd = inst->resSched.top()->cmd; + DPRINTF(InOrderMDU, + "[tid:%i]: [sn:%i]: Updating the command for this instruction\n", + inst->readTid(), inst->seqNum); + } else { + // If same command, just check to see if memory access was completed + // but dont try to re-execute + DPRINTF(InOrderMDU, + "[tid:%i]: [sn:%i]: requesting this resource again\n", + inst->readTid(), inst->seqNum); + } +} int MultDivUnit::getSlot(DynInstPtr inst) { @@ -232,8 +257,13 @@ MultDivUnit::execute(int slot_num) // counting down the time { DPRINTF(InOrderMDU, "End MDU called ...\n"); - if (mult_div_req->getInst()->isExecuted()) + if (mult_div_req->getInst()->isExecuted()) { + DPRINTF(InOrderMDU, "Mult/Div finished.\n"); mult_div_req->done(); + } else { + mult_div_req->setCompleted(false); + } + } break; diff --git a/src/cpu/inorder/resources/mult_div_unit.hh b/src/cpu/inorder/resources/mult_div_unit.hh index 76180714c..d3dd0260d 100644 --- a/src/cpu/inorder/resources/mult_div_unit.hh +++ b/src/cpu/inorder/resources/mult_div_unit.hh @@ -82,6 +82,8 @@ class MultDivUnit : public Resource { /** Register extra resource stats */ virtual void regStats(); + void requestAgain(DynInstPtr inst, bool &try_request); + protected: /** Latency & Repeat Rate for Multiply Insts */ unsigned multRepeatRate; |