xref: /XiangShan/src/main/scala/xiangshan/backend/issue/Scheduler.scala (revision f8b278aa7f5c894b2f00114935bd4d8edb8a885c)

package xiangshan.backend.issue

import org.chipsalliance.cde.config.Parameters
import chisel3._
import chisel3.util._
import freechips.rocketchip.diplomacy.{LazyModule, LazyModuleImp}
import utils.{HasPerfEvents, OptionWrapper}
import xiangshan._
import xiangshan.backend.Bundles._
import xiangshan.backend.datapath.DataConfig._
import xiangshan.backend.datapath.WbConfig._
import xiangshan.backend.fu.FuType
import xiangshan.backend.regfile.RfWritePortWithConfig
import xiangshan.backend.rename.BusyTable
import xiangshan.mem.{LsqEnqCtrl, LsqEnqIO, MemWaitUpdateReq, SqPtr, LqPtr}
import xiangshan.backend.datapath.WbConfig.V0WB
import xiangshan.backend.regfile.VlPregParams

sealed trait SchedulerType

case class IntScheduler() extends SchedulerType
case class FpScheduler() extends SchedulerType
case class MemScheduler() extends SchedulerType
case class VfScheduler() extends SchedulerType
case class NoScheduler() extends SchedulerType

class Scheduler(val params: SchdBlockParams)(implicit p: Parameters) extends LazyModule with HasXSParameter {
  override def shouldBeInlined: Boolean = false

  val numIntStateWrite = backendParams.numPregWb(IntData())
  val numFpStateWrite = backendParams.numPregWb(FpData())
  val numVfStateWrite = backendParams.numPregWb(VecData())
  val numV0StateWrite = backendParams.numPregWb(V0Data())
  val numVlStateWrite = backendParams.numPregWb(VlData())

  val dispatch2Iq = LazyModule(new Dispatch2Iq(params))
  val issueQueue = params.issueBlockParams.map(x => LazyModule(new IssueQueue(x).suggestName(x.getIQName)))

  lazy val module: SchedulerImpBase = params.schdType match {
    case IntScheduler() => new SchedulerArithImp(this)(params, p)
    case FpScheduler()  => new SchedulerArithImp(this)(params, p)
    case MemScheduler() => new SchedulerMemImp(this)(params, p)
    case VfScheduler() => new SchedulerArithImp(this)(params, p)
    case _ => null
  }
}

class SchedulerIO()(implicit params: SchdBlockParams, p: Parameters) extends XSBundle {
  // params alias
  private val LoadQueueSize = VirtualLoadQueueSize

  val fromTop = new Bundle {
    val hartId = Input(UInt(8.W))
  }
  val fromWbFuBusyTable = new Bundle{
    val fuBusyTableRead = MixedVec(params.issueBlockParams.map(x => Input(x.genWbFuBusyTableReadBundle)))
  }
  val wbFuBusyTable = MixedVec(params.issueBlockParams.map(x => Output(x.genWbFuBusyTableWriteBundle)))
  val intIQValidNumVec = Output(MixedVec(backendParams.genIntIQValidNumBundle))
  val fpIQValidNumVec = Output(MixedVec(backendParams.genFpIQValidNumBundle))

  val fromCtrlBlock = new Bundle {
    val flush = Flipped(ValidIO(new Redirect))
  }
  val fromDispatch = new Bundle {
    val allocPregs = Vec(RenameWidth, Input(new ResetPregStateReq))
    val uops =  Vec(params.numUopIn, Flipped(DecoupledIO(new DynInst)))
  }
  val intWriteBack = MixedVec(Vec(backendParams.numPregWb(IntData()),
    new RfWritePortWithConfig(backendParams.intPregParams.dataCfg, backendParams.intPregParams.addrWidth)))
  val fpWriteBack = MixedVec(Vec(backendParams.numPregWb(FpData()),
    new RfWritePortWithConfig(backendParams.fpPregParams.dataCfg, backendParams.fpPregParams.addrWidth)))
  val vfWriteBack = MixedVec(Vec(backendParams.numPregWb(VecData()),
    new RfWritePortWithConfig(backendParams.vfPregParams.dataCfg, backendParams.vfPregParams.addrWidth)))
  val v0WriteBack = MixedVec(Vec(backendParams.numPregWb(V0Data()),
    new RfWritePortWithConfig(backendParams.v0PregParams.dataCfg, backendParams.v0PregParams.addrWidth)))
  val vlWriteBack = MixedVec(Vec(backendParams.numPregWb(VlData()),
    new RfWritePortWithConfig(backendParams.vlPregParams.dataCfg, backendParams.vlPregParams.addrWidth)))
  val toDataPathAfterDelay: MixedVec[MixedVec[DecoupledIO[IssueQueueIssueBundle]]] = MixedVec(params.issueBlockParams.map(_.genIssueDecoupledBundle))

  val vlWriteBackInfo = new Bundle {
    val vlIsZero = Input(Bool())
    val vlIsVlmax = Input(Bool())
  }

  val fromSchedulers = new Bundle {
    val wakeupVec: MixedVec[ValidIO[IssueQueueIQWakeUpBundle]] = Flipped(params.genIQWakeUpInValidBundle)
  }

  val toSchedulers = new Bundle {
    val wakeupVec: MixedVec[ValidIO[IssueQueueIQWakeUpBundle]] = params.genIQWakeUpOutValidBundle
  }

  val fromDataPath = new Bundle {
    val resp: MixedVec[MixedVec[OGRespBundle]] = MixedVec(params.issueBlockParams.map(x => Flipped(x.genOGRespBundle)))
    val og0Cancel = Input(ExuVec())
    // Todo: remove this after no cancel signal from og1
    val og1Cancel = Input(ExuVec())
    // replace RCIdx to Wakeup Queue
    val replaceRCIdx = OptionWrapper(params.needWriteRegCache, Vec(params.numWriteRegCache, Input(UInt(RegCacheIdxWidth.W))))
    // just be compatible to old code
    def apply(i: Int)(j: Int) = resp(i)(j)
  }

  val loadFinalIssueResp = MixedVec(params.issueBlockParams.map(x => MixedVec(Vec(x.LdExuCnt, Flipped(ValidIO(new IssueQueueDeqRespBundle()(p, x)))))))
  val memAddrIssueResp = MixedVec(params.issueBlockParams.map(x => MixedVec(Vec(x.LdExuCnt, Flipped(ValidIO(new IssueQueueDeqRespBundle()(p, x)))))))
  val vecLoadIssueResp = MixedVec(params.issueBlockParams.map(x => MixedVec(Vec(x.VlduCnt, Flipped(ValidIO(new IssueQueueDeqRespBundle()(p, x)))))))

  val ldCancel = Vec(backendParams.LduCnt + backendParams.HyuCnt, Flipped(new LoadCancelIO))

  val memIO = if (params.isMemSchd) Some(new Bundle {
    val lsqEnqIO = Flipped(new LsqEnqIO)
  }) else None
  val fromMem = if (params.isMemSchd) Some(new Bundle {
    val ldaFeedback = Flipped(Vec(params.LduCnt, new MemRSFeedbackIO))
    val staFeedback = Flipped(Vec(params.StaCnt, new MemRSFeedbackIO))
    val hyuFeedback = Flipped(Vec(params.HyuCnt, new MemRSFeedbackIO))
    val vstuFeedback = Flipped(Vec(params.VstuCnt, new MemRSFeedbackIO(isVector = true)))
    val vlduFeedback = Flipped(Vec(params.VlduCnt, new MemRSFeedbackIO(isVector = true)))
    val stIssuePtr = Input(new SqPtr())
    val lcommit = Input(UInt(log2Up(CommitWidth + 1).W))
    val scommit = Input(UInt(log2Ceil(EnsbufferWidth + 1).W)) // connected to `memBlock.io.sqDeq` instead of ROB
    val wakeup = Vec(params.LdExuCnt, Flipped(Valid(new DynInst)))
    val lqDeqPtr = Input(new LqPtr)
    val sqDeqPtr = Input(new SqPtr)
    // from lsq
    val lqCancelCnt = Input(UInt(log2Up(LoadQueueSize + 1).W))
    val sqCancelCnt = Input(UInt(log2Up(StoreQueueSize + 1).W))
    val memWaitUpdateReq = Flipped(new MemWaitUpdateReq)
  }) else None
  val toMem = if (params.isMemSchd) Some(new Bundle {
    val loadFastMatch = Output(Vec(params.LduCnt, new IssueQueueLoadBundle))
  }) else None
  val fromOg2 = if(params.isVfSchd) Some(MixedVec(params.issueBlockParams.map(x => Flipped(x.genOG2RespBundle)))) else None
}

abstract class SchedulerImpBase(wrapper: Scheduler)(implicit params: SchdBlockParams, p: Parameters)
  extends LazyModuleImp(wrapper)
    with HasXSParameter
{
  val io = IO(new SchedulerIO())

  // alias
  private val iqWakeUpInMap: Map[Int, ValidIO[IssueQueueIQWakeUpBundle]] =
    io.fromSchedulers.wakeupVec.map(x => (x.bits.exuIdx, x)).toMap
  private val schdType = params.schdType

  // Modules
  val dispatch2Iq: Dispatch2IqImp = wrapper.dispatch2Iq.module
  val issueQueues: Seq[IssueQueueImp] = wrapper.issueQueue.map(_.module)
  io.intIQValidNumVec := 0.U.asTypeOf(io.intIQValidNumVec)
  io.fpIQValidNumVec := 0.U.asTypeOf(io.fpIQValidNumVec)
  if (params.isIntSchd) {
    dispatch2Iq.io.intIQValidNumVec.get := io.intIQValidNumVec
    io.intIQValidNumVec := MixedVecInit(issueQueues.map(_.io.validCntDeqVec))
  }
  else if (params.isFpSchd) {
    dispatch2Iq.io.fpIQValidNumVec.get := io.fpIQValidNumVec
    io.fpIQValidNumVec := MixedVecInit(issueQueues.map(_.io.validCntDeqVec))
  }

  // valid count
  dispatch2Iq.io.iqValidCnt := issueQueues.filter(_.params.StdCnt == 0).map(_.io.status.validCnt)

  // BusyTable Modules
  val intBusyTable = schdType match {
    case IntScheduler() | MemScheduler() => Some(Module(new BusyTable(dispatch2Iq.numIntStateRead, wrapper.numIntStateWrite, IntPhyRegs, IntWB())))
    case _ => None
  }
  val fpBusyTable = schdType match {
    case FpScheduler() | MemScheduler() => Some(Module(new BusyTable(dispatch2Iq.numFpStateRead, wrapper.numFpStateWrite, FpPhyRegs, FpWB())))
    case _ => None
  }
  val vfBusyTable = schdType match {
    case VfScheduler() | MemScheduler() => Some(Module(new BusyTable(dispatch2Iq.numVfStateRead, wrapper.numVfStateWrite, VfPhyRegs, VfWB())))
    case _ => None
  }
  val v0BusyTable = schdType match {
    case VfScheduler() | MemScheduler() => Some(Module(new BusyTable(dispatch2Iq.numV0StateRead, wrapper.numV0StateWrite, V0PhyRegs, V0WB())))
    case _ => None
  }
  val vlBusyTable = schdType match {
    case VfScheduler() | MemScheduler() => Some(Module(new BusyTable(dispatch2Iq.numVlStateRead, wrapper.numVlStateWrite, VlPhyRegs, VlWB())))
    case _ => None
  }

  dispatch2Iq.io match { case dp2iq =>
    dp2iq.redirect <> io.fromCtrlBlock.flush
    dp2iq.in <> io.fromDispatch.uops
    dp2iq.readIntState.foreach(_ <> intBusyTable.get.io.read)
    dp2iq.readFpState.foreach(_ <> fpBusyTable.get.io.read)
    dp2iq.readVfState.foreach(_ <> vfBusyTable.get.io.read)
    dp2iq.readV0State.foreach(_ <> v0BusyTable.get.io.read)
    dp2iq.readVlState.foreach(_ <> vlBusyTable.get.io.read)
  }

  intBusyTable match {
    case Some(bt) =>
      bt.io.allocPregs.zip(io.fromDispatch.allocPregs).foreach { case (btAllocPregs, dpAllocPregs) =>
        btAllocPregs.valid := dpAllocPregs.isInt
        btAllocPregs.bits := dpAllocPregs.preg
      }
      bt.io.wbPregs.zipWithIndex.foreach { case (wb, i) =>
        wb.valid := io.intWriteBack(i).wen && io.intWriteBack(i).intWen
        wb.bits := io.intWriteBack(i).addr
      }
      bt.io.wakeUp := io.fromSchedulers.wakeupVec
      bt.io.og0Cancel := io.fromDataPath.og0Cancel
      bt.io.ldCancel := io.ldCancel
    case None =>
  }

  fpBusyTable match {
    case Some(bt) =>
      bt.io.allocPregs.zip(io.fromDispatch.allocPregs).foreach { case (btAllocPregs, dpAllocPregs) =>
        btAllocPregs.valid := dpAllocPregs.isFp
        btAllocPregs.bits := dpAllocPregs.preg
      }
      bt.io.wbPregs.zipWithIndex.foreach { case (wb, i) =>
        wb.valid := io.fpWriteBack(i).wen && io.fpWriteBack(i).fpWen
        wb.bits := io.fpWriteBack(i).addr
      }
      bt.io.wakeUp := io.fromSchedulers.wakeupVec
      bt.io.og0Cancel := io.fromDataPath.og0Cancel
      bt.io.ldCancel := io.ldCancel
    case None =>
  }

  vfBusyTable match {
    case Some(bt) =>
      bt.io.allocPregs.zip(io.fromDispatch.allocPregs).foreach { case (btAllocPregs, dpAllocPregs) =>
        btAllocPregs.valid := dpAllocPregs.isVec
        btAllocPregs.bits := dpAllocPregs.preg
      }
      bt.io.wbPregs.zipWithIndex.foreach { case (wb, i) =>
        wb.valid := io.vfWriteBack(i).wen && io.vfWriteBack(i).vecWen
        wb.bits := io.vfWriteBack(i).addr
      }
      bt.io.wakeUp := io.fromSchedulers.wakeupVec
      bt.io.og0Cancel := io.fromDataPath.og0Cancel
      bt.io.ldCancel := io.ldCancel
    case None =>
  }

  v0BusyTable match {
    case Some(bt) =>
      bt.io.allocPregs.zip(io.fromDispatch.allocPregs).foreach { case (btAllocPregs, dpAllocPregs) =>
        btAllocPregs.valid := dpAllocPregs.isV0
        btAllocPregs.bits := dpAllocPregs.preg
      }
      bt.io.wbPregs.zipWithIndex.foreach { case (wb, i) =>
        wb.valid := io.v0WriteBack(i).wen && io.v0WriteBack(i).v0Wen
        wb.bits := io.v0WriteBack(i).addr
      }
      bt.io.wakeUp := io.fromSchedulers.wakeupVec
      bt.io.og0Cancel := io.fromDataPath.og0Cancel
      bt.io.ldCancel := io.ldCancel
    case None =>
  }

  vlBusyTable match {
    case Some(bt) =>
      bt.io.allocPregs.zip(io.fromDispatch.allocPregs).foreach { case (btAllocPregs, dpAllocPregs) =>
        btAllocPregs.valid := dpAllocPregs.isVl
        btAllocPregs.bits := dpAllocPregs.preg
      }
      bt.io.wbPregs.zipWithIndex.foreach { case (wb, i) =>
        wb.valid := io.vlWriteBack(i).wen && io.vlWriteBack(i).vlWen
        wb.bits := io.vlWriteBack(i).addr
      }
      bt.io.wakeUp := io.fromSchedulers.wakeupVec
      bt.io.og0Cancel := io.fromDataPath.og0Cancel
      bt.io.ldCancel := io.ldCancel
    case None =>
  }

  val wakeupFromIntWBVec = Wire(params.genIntWBWakeUpSinkValidBundle)
  val wakeupFromFpWBVec = Wire(params.genFpWBWakeUpSinkValidBundle)
  val wakeupFromVfWBVec = Wire(params.genVfWBWakeUpSinkValidBundle)
  val wakeupFromV0WBVec = Wire(params.genV0WBWakeUpSinkValidBundle)
  val wakeupFromVlWBVec = Wire(params.genVlWBWakeUpSinkValidBundle)

  wakeupFromIntWBVec.zip(io.intWriteBack).foreach { case (sink, source) =>
    sink.valid := source.wen
    sink.bits.rfWen := source.intWen
    sink.bits.fpWen := source.fpWen
    sink.bits.vecWen := source.vecWen
    sink.bits.v0Wen := source.v0Wen
    sink.bits.vlWen := source.vlWen
    sink.bits.pdest := source.addr
  }

  wakeupFromFpWBVec.zip(io.fpWriteBack).foreach { case (sink, source) =>
    sink.valid := source.wen
    sink.bits.rfWen := source.intWen
    sink.bits.fpWen := source.fpWen
    sink.bits.vecWen := source.vecWen
    sink.bits.v0Wen := source.v0Wen
    sink.bits.vlWen := source.vlWen
    sink.bits.pdest := source.addr
  }

  wakeupFromVfWBVec.zip(io.vfWriteBack).foreach { case (sink, source) =>
    sink.valid := source.wen
    sink.bits.rfWen := source.intWen
    sink.bits.fpWen := source.fpWen
    sink.bits.vecWen := source.vecWen
    sink.bits.v0Wen := source.v0Wen
    sink.bits.vlWen := source.vlWen
    sink.bits.pdest := source.addr
  }

  wakeupFromV0WBVec.zip(io.v0WriteBack).foreach { case (sink, source) =>
    sink.valid := source.wen
    sink.bits.rfWen := source.intWen
    sink.bits.fpWen := source.fpWen
    sink.bits.vecWen := source.vecWen
    sink.bits.v0Wen := source.v0Wen
    sink.bits.vlWen := source.vlWen
    sink.bits.pdest := source.addr
  }

  wakeupFromVlWBVec.zip(io.vlWriteBack).foreach { case (sink, source) =>
    sink.valid := source.wen
    sink.bits.rfWen := source.intWen
    sink.bits.fpWen := source.fpWen
    sink.bits.vecWen := source.vecWen
    sink.bits.v0Wen := source.v0Wen
    sink.bits.vlWen := source.vlWen
    sink.bits.pdest := source.addr
  }

  // Connect bundles having the same wakeup source
  issueQueues.zipWithIndex.foreach { case(iq, i) =>
    iq.io.wakeupFromIQ.foreach { wakeUp =>
      val wakeUpIn = iqWakeUpInMap(wakeUp.bits.exuIdx)
      val exuIdx = wakeUp.bits.exuIdx
      println(s"[Backend] Connect wakeup exuIdx ${exuIdx}")
      connectSamePort(wakeUp,wakeUpIn)
      backendParams.connectWakeup(exuIdx)
      if (backendParams.isCopyPdest(exuIdx)) {
        println(s"[Backend] exuIdx ${exuIdx} use pdestCopy ${backendParams.getCopyPdestIndex(exuIdx)}")
        wakeUp.bits.pdest := wakeUpIn.bits.pdestCopy.get(backendParams.getCopyPdestIndex(exuIdx))
        if (wakeUpIn.bits.rfWenCopy.nonEmpty) wakeUp.bits.rfWen := wakeUpIn.bits.rfWenCopy.get(backendParams.getCopyPdestIndex(exuIdx))
        if (wakeUpIn.bits.fpWenCopy.nonEmpty) wakeUp.bits.fpWen := wakeUpIn.bits.fpWenCopy.get(backendParams.getCopyPdestIndex(exuIdx))
        if (wakeUpIn.bits.vecWenCopy.nonEmpty) wakeUp.bits.vecWen := wakeUpIn.bits.vecWenCopy.get(backendParams.getCopyPdestIndex(exuIdx))
        if (wakeUpIn.bits.v0WenCopy.nonEmpty) wakeUp.bits.v0Wen := wakeUpIn.bits.v0WenCopy.get(backendParams.getCopyPdestIndex(exuIdx))
        if (wakeUpIn.bits.vlWenCopy.nonEmpty) wakeUp.bits.vlWen := wakeUpIn.bits.vlWenCopy.get(backendParams.getCopyPdestIndex(exuIdx))
        if (wakeUpIn.bits.loadDependencyCopy.nonEmpty) wakeUp.bits.loadDependency := wakeUpIn.bits.loadDependencyCopy.get(backendParams.getCopyPdestIndex(exuIdx))
      }
      if (iq.params.numIntSrc == 0) wakeUp.bits.rfWen := false.B
      if (iq.params.numFpSrc == 0)  wakeUp.bits.fpWen := false.B
      if (iq.params.numVfSrc == 0)  wakeUp.bits.vecWen := false.B
      if (iq.params.numV0Src == 0)  wakeUp.bits.v0Wen := false.B
      if (iq.params.numVlSrc == 0)  wakeUp.bits.vlWen := false.B
    }
    iq.io.og0Cancel := io.fromDataPath.og0Cancel
    iq.io.og1Cancel := io.fromDataPath.og1Cancel
    iq.io.ldCancel := io.ldCancel
  }

  // connect the vl writeback informatino to the issue queues
  issueQueues.zipWithIndex.foreach { case(iq, i) =>
    iq.io.vlIsVlmax := io.vlWriteBackInfo.vlIsVlmax
    iq.io.vlIsZero := io.vlWriteBackInfo.vlIsZero
  }

  private val iqWakeUpOutMap: Map[Int, ValidIO[IssueQueueIQWakeUpBundle]] =
    issueQueues.flatMap(_.io.wakeupToIQ)
      .map(x => (x.bits.exuIdx, x))
      .toMap

  // Connect bundles having the same wakeup source
  io.toSchedulers.wakeupVec.foreach { wakeUp =>
    wakeUp := iqWakeUpOutMap(wakeUp.bits.exuIdx)
  }

  io.toDataPathAfterDelay.zipWithIndex.foreach { case (toDpDy, i) =>
    toDpDy <> issueQueues(i).io.deqDelay
  }

  // Response
  issueQueues.zipWithIndex.foreach { case (iq, i) =>
    iq.io.og0Resp.zipWithIndex.foreach { case (og0Resp, j) =>
      og0Resp := io.fromDataPath(i)(j).og0resp
    }
    iq.io.og1Resp.zipWithIndex.foreach { case (og1Resp, j) =>
      og1Resp := io.fromDataPath(i)(j).og1resp
    }
    iq.io.finalIssueResp.foreach(_.zipWithIndex.foreach { case (finalIssueResp, j) =>
      if (io.loadFinalIssueResp(i).isDefinedAt(j)) {
        finalIssueResp := io.loadFinalIssueResp(i)(j)
      } else {
        finalIssueResp := 0.U.asTypeOf(finalIssueResp)
      }
    })
    iq.io.memAddrIssueResp.foreach(_.zipWithIndex.foreach { case (memAddrIssueResp, j) =>
      if (io.memAddrIssueResp(i).isDefinedAt(j)) {
        memAddrIssueResp := io.memAddrIssueResp(i)(j)
      } else {
        memAddrIssueResp := 0.U.asTypeOf(memAddrIssueResp)
      }
    })
    iq.io.vecLoadIssueResp.foreach(_.zipWithIndex.foreach { case (resp, deqIdx) =>
      resp := io.vecLoadIssueResp(i)(deqIdx)
    })
    if(params.isVfSchd) {
      iq.io.og2Resp.get.zipWithIndex.foreach { case (og2Resp, exuIdx) =>
        og2Resp := io.fromOg2.get(i)(exuIdx)
      }
    }
    iq.io.wbBusyTableRead := io.fromWbFuBusyTable.fuBusyTableRead(i)
    io.wbFuBusyTable(i) := iq.io.wbBusyTableWrite
    iq.io.replaceRCIdx.foreach(x => x := 0.U.asTypeOf(x))
  }

  // Connect each replace RCIdx to IQ
  if (params.needWriteRegCache) {
    val iqReplaceRCIdxVec = issueQueues.filter(_.params.needWriteRegCache).flatMap{ iq =>
      iq.params.allExuParams.zip(iq.io.replaceRCIdx.get).filter(_._1.needWriteRegCache).map(_._2)
    }
    iqReplaceRCIdxVec.zip(io.fromDataPath.replaceRCIdx.get).foreach{ case (iq, in) =>
      iq := in
    }

    println(s"[Scheduler] numWriteRegCache: ${params.numWriteRegCache}")
    println(s"[Scheduler] iqReplaceRCIdxVec: ${iqReplaceRCIdxVec.size}")
  }

  // perfEvent
  val lastCycleDp2IqOutFireVec = RegNext(VecInit(dispatch2Iq.io.out.flatten.map(_.fire)))
  val lastCycleIqEnqFireVec    = RegNext(VecInit(issueQueues.map(_.io.enq.map(_.fire)).flatten))
  val lastCycleIqFullVec       = RegNext(VecInit(issueQueues.map(_.io.enq.head.ready)))

  val issueQueueFullVecPerf = issueQueues.zip(lastCycleIqFullVec)map{ case (iq, full) => (iq.params.getIQName + s"_full", full) }
  val basePerfEvents = Seq(
    ("dispatch2Iq_out_fire_cnt", PopCount(lastCycleDp2IqOutFireVec)                 ),
    ("issueQueue_enq_fire_cnt",  PopCount(lastCycleIqEnqFireVec)                    )
  )  ++ issueQueueFullVecPerf

  println(s"[Scheduler] io.fromSchedulers.wakeupVec: ${io.fromSchedulers.wakeupVec.map(x => backendParams.getExuName(x.bits.exuIdx))}")
  println(s"[Scheduler] iqWakeUpInKeys: ${iqWakeUpInMap.keys}")

  println(s"[Scheduler] iqWakeUpOutKeys: ${iqWakeUpOutMap.keys}")
  println(s"[Scheduler] io.toSchedulers.wakeupVec: ${io.toSchedulers.wakeupVec.map(x => backendParams.getExuName(x.bits.exuIdx))}")
}

class SchedulerArithImp(override val wrapper: Scheduler)(implicit params: SchdBlockParams, p: Parameters)
  extends SchedulerImpBase(wrapper)
    with HasXSParameter
    with HasPerfEvents
{
//  dontTouch(io.vfWbFuBusyTable)
  println(s"[SchedulerArithImp] " +
    s"has intBusyTable: ${intBusyTable.nonEmpty}, " +
    s"has vfBusyTable: ${vfBusyTable.nonEmpty}")

  issueQueues.zipWithIndex.foreach { case (iq, i) =>
    iq.io.flush <> io.fromCtrlBlock.flush
    iq.io.enq <> dispatch2Iq.io.out(i)
    val intWBIQ = params.schdType match {
      case IntScheduler() => wakeupFromIntWBVec.zipWithIndex.filter(x => iq.params.needWakeupFromIntWBPort.keys.toSeq.contains(x._2)).map(_._1)
      case FpScheduler() => wakeupFromFpWBVec.zipWithIndex.filter(x => iq.params.needWakeupFromFpWBPort.keys.toSeq.contains(x._2)).map(_._1)
      case VfScheduler() => (wakeupFromVfWBVec.zipWithIndex.filter(x => iq.params.needWakeupFromVfWBPort.keys.toSeq.contains(x._2)).map(_._1) ++
                             wakeupFromV0WBVec.zipWithIndex.filter(x => iq.params.needWakeupFromV0WBPort.keys.toSeq.contains(x._2)).map(_._1) ++
                             wakeupFromVlWBVec.zipWithIndex.filter(x => iq.params.needWakeupFromVlWBPort.keys.toSeq.contains(x._2)).map(_._1))
      case _ => null
    }
    iq.io.wakeupFromWB.zip(intWBIQ).foreach{ case (sink, source) => sink := source}
  }

  val perfEvents = basePerfEvents
  generatePerfEvent()
}

// FIXME: Vector mem instructions may not be handled properly!
class SchedulerMemImp(override val wrapper: Scheduler)(implicit params: SchdBlockParams, p: Parameters)
  extends SchedulerImpBase(wrapper)
    with HasXSParameter
    with HasPerfEvents
{
  println(s"[SchedulerMemImp] " +
    s"has intBusyTable: ${intBusyTable.nonEmpty}, " +
    s"has vfBusyTable: ${vfBusyTable.nonEmpty}")

  val memAddrIQs = issueQueues.filter(_.params.isMemAddrIQ)
  val stAddrIQs = issueQueues.filter(iq => iq.params.StaCnt > 0) // included in memAddrIQs
  val ldAddrIQs = issueQueues.filter(iq => iq.params.LduCnt > 0)
  val stDataIQs = issueQueues.filter(iq => iq.params.StdCnt > 0)
  val vecMemIQs = issueQueues.filter(_.params.isVecMemIQ)
  val (hyuIQs, hyuIQIdxs) = issueQueues.zipWithIndex.filter(_._1.params.HyuCnt > 0).unzip

  println(s"[SchedulerMemImp] memAddrIQs.size: ${memAddrIQs.size}, enq.size: ${memAddrIQs.map(_.io.enq.size).sum}")
  println(s"[SchedulerMemImp] stAddrIQs.size:  ${stAddrIQs.size }, enq.size: ${stAddrIQs.map(_.io.enq.size).sum}")
  println(s"[SchedulerMemImp] ldAddrIQs.size:  ${ldAddrIQs.size }, enq.size: ${ldAddrIQs.map(_.io.enq.size).sum}")
  println(s"[SchedulerMemImp] stDataIQs.size:  ${stDataIQs.size }, enq.size: ${stDataIQs.map(_.io.enq.size).sum}")
  println(s"[SchedulerMemImp] hyuIQs.size:     ${hyuIQs.size    }, enq.size: ${hyuIQs.map(_.io.enq.size).sum}")
  require(memAddrIQs.nonEmpty && stDataIQs.nonEmpty)

  io.toMem.get.loadFastMatch := 0.U.asTypeOf(io.toMem.get.loadFastMatch) // TODO: is still needed?

  private val loadWakeUp = issueQueues.filter(_.params.LdExuCnt > 0).map(_.asInstanceOf[IssueQueueMemAddrImp].io.memIO.get.loadWakeUp).flatten
  require(loadWakeUp.length == io.fromMem.get.wakeup.length)
  loadWakeUp.zip(io.fromMem.get.wakeup).foreach(x => x._1 := x._2)

  memAddrIQs.zipWithIndex.foreach { case (iq, i) =>
    iq.io.flush <> io.fromCtrlBlock.flush
    iq.io.enq <> dispatch2Iq.io.out(i)
    iq.io.wakeupFromWB.zip(
      wakeupFromIntWBVec.zipWithIndex.filter(x => iq.params.needWakeupFromIntWBPort.keys.toSeq.contains(x._2)).map(_._1) ++
      wakeupFromFpWBVec.zipWithIndex.filter(x => iq.params.needWakeupFromFpWBPort.keys.toSeq.contains(x._2)).map(_._1) ++
      wakeupFromVfWBVec.zipWithIndex.filter(x => iq.params.needWakeupFromVfWBPort.keys.toSeq.contains(x._2)).map(_._1) ++
      wakeupFromV0WBVec.zipWithIndex.filter(x => iq.params.needWakeupFromV0WBPort.keys.toSeq.contains(x._2)).map(_._1) ++
      wakeupFromVlWBVec.zipWithIndex.filter(x => iq.params.needWakeupFromVlWBPort.keys.toSeq.contains(x._2)).map(_._1)
    ).foreach{ case (sink, source) => sink := source}
  }

  ldAddrIQs.zipWithIndex.foreach {
    case (imp: IssueQueueMemAddrImp, i) =>
      imp.io.memIO.get.feedbackIO.head := 0.U.asTypeOf(imp.io.memIO.get.feedbackIO.head)
      imp.io.memIO.get.checkWait.stIssuePtr := io.fromMem.get.stIssuePtr
      imp.io.memIO.get.checkWait.memWaitUpdateReq := io.fromMem.get.memWaitUpdateReq
    case _ =>
  }

  stAddrIQs.zipWithIndex.foreach {
    case (imp: IssueQueueMemAddrImp, i) =>
      imp.io.memIO.get.feedbackIO.head := io.fromMem.get.staFeedback(i)
      imp.io.memIO.get.checkWait.stIssuePtr := io.fromMem.get.stIssuePtr
      imp.io.memIO.get.checkWait.memWaitUpdateReq := io.fromMem.get.memWaitUpdateReq
    case _ =>
  }

  hyuIQs.zip(hyuIQIdxs).foreach {
    case (imp: IssueQueueMemAddrImp, idx) =>
      imp.io.memIO.get.feedbackIO.head := io.fromMem.get.hyuFeedback.head
      imp.io.memIO.get.feedbackIO(1) := 0.U.asTypeOf(imp.io.memIO.get.feedbackIO(1))
      imp.io.memIO.get.checkWait.stIssuePtr := io.fromMem.get.stIssuePtr
      imp.io.memIO.get.checkWait.memWaitUpdateReq := io.fromMem.get.memWaitUpdateReq
      // TODO: refactor ditry code
      imp.io.deqDelay(1).ready := false.B
      io.toDataPathAfterDelay(idx)(1).valid := false.B
      io.toDataPathAfterDelay(idx)(1).bits := 0.U.asTypeOf(io.toDataPathAfterDelay(idx)(1).bits)
    case _ =>
  }

  private val staIdxSeq = (stAddrIQs).map(iq => iq.params.idxInSchBlk)
  private val hyaIdxSeq = (hyuIQs).map(iq => iq.params.idxInSchBlk)

  println(s"[SchedulerMemImp] sta iq idx in memSchdBlock: $staIdxSeq")
  println(s"[SchedulerMemImp] hya iq idx in memSchdBlock: $hyaIdxSeq")

  private val staEnqs = stAddrIQs.map(_.io.enq).flatten
  private val stdEnqs = stDataIQs.map(_.io.enq).flatten.take(staEnqs.size)
  private val hyaEnqs = hyuIQs.map(_.io.enq).flatten
  private val hydEnqs = stDataIQs.map(_.io.enq).flatten.drop(staEnqs.size)

  require(staEnqs.size == stdEnqs.size, s"number of enq ports of store address IQs(${staEnqs.size}) " +
  s"should be equal to number of enq ports of store data IQs(${stdEnqs.size})")

  require(hyaEnqs.size == hydEnqs.size, s"number of enq ports of hybrid address IQs(${hyaEnqs.size}) " +
  s"should be equal to number of enq ports of hybrid data IQs(${hydEnqs.size})")

  val d2IqStaOut = dispatch2Iq.io.out.zipWithIndex.filter(staIdxSeq contains _._2).unzip._1.flatten
  d2IqStaOut.zip(staEnqs).zip(stdEnqs).foreach{ case((dp, staIQ), stdIQ) =>
    val isAllReady = staIQ.ready && stdIQ.ready
    dp.ready := isAllReady
    staIQ.valid := dp.valid && isAllReady
    stdIQ.valid := dp.valid && isAllReady && FuType.FuTypeOrR(dp.bits.fuType, FuType.stu, FuType.mou)
  }

  val d2IqHyaOut = dispatch2Iq.io.out.zipWithIndex.filter(hyaIdxSeq contains _._2).unzip._1.flatten
  d2IqHyaOut.zip(hyaEnqs).zip(hydEnqs).foreach{ case((dp, hyaIQ), hydIQ) =>
    val isAllReady = hyaIQ.ready && hydIQ.ready
    dp.ready := isAllReady
    hyaIQ.valid := dp.valid && isAllReady
    hydIQ.valid := dp.valid && isAllReady && FuType.FuTypeOrR(dp.bits.fuType, FuType.stu, FuType.mou)
  }

  stDataIQs.zipWithIndex.foreach { case (iq, i) =>
    iq.io.flush <> io.fromCtrlBlock.flush
    iq.io.wakeupFromWB.zip(
      wakeupFromIntWBVec.zipWithIndex.filter(x => iq.params.needWakeupFromIntWBPort.keys.toSeq.contains(x._2)).map(_._1).toSeq ++
      wakeupFromFpWBVec.zipWithIndex.filter(x => iq.params.needWakeupFromFpWBPort.keys.toSeq.contains(x._2)).map(_._1).toSeq ++
      wakeupFromVfWBVec.zipWithIndex.filter(x => iq.params.needWakeupFromVfWBPort.keys.toSeq.contains(x._2)).map(_._1).toSeq ++
      wakeupFromV0WBVec.zipWithIndex.filter(x => iq.params.needWakeupFromV0WBPort.keys.toSeq.contains(x._2)).map(_._1).toSeq ++
      wakeupFromVlWBVec.zipWithIndex.filter(x => iq.params.needWakeupFromVlWBPort.keys.toSeq.contains(x._2)).map(_._1).toSeq
    ).foreach{ case (sink, source) => sink := source}
  }

  (stdEnqs ++ hydEnqs).zip(staEnqs ++ hyaEnqs).zipWithIndex.foreach { case ((stdIQEnq, staIQEnq), i) =>
    stdIQEnq.bits  := staIQEnq.bits
    // Store data reuses store addr src(1) in dispatch2iq
    // [dispatch2iq] --src*------src*(0)--> [staIQ|hyaIQ]
    //                       \
    //                        ---src*(1)--> [stdIQ]
    // Since the src(1) of sta is easier to get, stdIQEnq.bits.src*(0) is assigned to staIQEnq.bits.src*(1)
    // instead of dispatch2Iq.io.out(x).bits.src*(1)
    val stdIdx = 1
    stdIQEnq.bits.srcState(0) := staIQEnq.bits.srcState(stdIdx)
    stdIQEnq.bits.srcLoadDependency(0) := staIQEnq.bits.srcLoadDependency(1)
      stdIQEnq.bits.srcType(0) := staIQEnq.bits.srcType(stdIdx)
    stdIQEnq.bits.psrc(0) := staIQEnq.bits.psrc(stdIdx)
    stdIQEnq.bits.sqIdx := staIQEnq.bits.sqIdx
  }

  vecMemIQs.foreach {
    case imp: IssueQueueVecMemImp =>
      imp.io.memIO.get.sqDeqPtr.foreach(_ := io.fromMem.get.sqDeqPtr)
      imp.io.memIO.get.lqDeqPtr.foreach(_ := io.fromMem.get.lqDeqPtr)
      // not used
      //imp.io.memIO.get.feedbackIO.head := io.fromMem.get.vstuFeedback.head // only vector store replay
      // maybe not used
      imp.io.memIO.get.checkWait.stIssuePtr := io.fromMem.get.stIssuePtr
      imp.io.memIO.get.checkWait.memWaitUpdateReq := io.fromMem.get.memWaitUpdateReq
      imp.io.wakeupFromWB.zip(
        wakeupFromIntWBVec.zipWithIndex.filter(x => imp.params.needWakeupFromIntWBPort.keys.toSeq.contains(x._2)).map(_._1).toSeq ++
        wakeupFromFpWBVec.zipWithIndex.filter(x => imp.params.needWakeupFromFpWBPort.keys.toSeq.contains(x._2)).map(_._1).toSeq ++
        wakeupFromVfWBVec.zipWithIndex.filter(x => imp.params.needWakeupFromVfWBPort.keys.toSeq.contains(x._2)).map(_._1).toSeq ++
        wakeupFromV0WBVec.zipWithIndex.filter(x => imp.params.needWakeupFromV0WBPort.keys.toSeq.contains(x._2)).map(_._1).toSeq ++
        wakeupFromVlWBVec.zipWithIndex.filter(x => imp.params.needWakeupFromVlWBPort.keys.toSeq.contains(x._2)).map(_._1).toSeq
      ).foreach{ case (sink, source) => sink := source}

    case _ =>
  }
  val vecMemFeedbackIO: Seq[MemRSFeedbackIO] = vecMemIQs.map {
    case imp: IssueQueueVecMemImp =>
      imp.io.memIO.get.feedbackIO
  }.flatten
  assert(vecMemFeedbackIO.size == io.fromMem.get.vstuFeedback.size, "vecMemFeedback size dont match!")
  vecMemFeedbackIO.zip(io.fromMem.get.vstuFeedback).foreach{
    case (sink, source) =>
      sink := source
  }

  val lsqEnqCtrl = Module(new LsqEnqCtrl)

  lsqEnqCtrl.io.redirect <> io.fromCtrlBlock.flush
  lsqEnqCtrl.io.enq <> dispatch2Iq.io.enqLsqIO.get
  lsqEnqCtrl.io.lcommit := io.fromMem.get.lcommit
  lsqEnqCtrl.io.scommit := io.fromMem.get.scommit
  lsqEnqCtrl.io.lqCancelCnt := io.fromMem.get.lqCancelCnt
  lsqEnqCtrl.io.sqCancelCnt := io.fromMem.get.sqCancelCnt
  dispatch2Iq.io.lqFreeCount.get := lsqEnqCtrl.io.lqFreeCount
  dispatch2Iq.io.sqFreeCount.get := lsqEnqCtrl.io.sqFreeCount
  io.memIO.get.lsqEnqIO <> lsqEnqCtrl.io.enqLsq

  dontTouch(io.vecLoadIssueResp)

  val intBusyTablePerf = intBusyTable.get
  val fpBusyTablePerf  = fpBusyTable.get
  val vecBusyTablePerf = vfBusyTable.get
  val v0BusyTablePerf  = v0BusyTable.get
  val vlBusyTablePerf  = vlBusyTable.get

  val perfEvents = basePerfEvents ++ Seq(intBusyTablePerf, fpBusyTablePerf, vecBusyTablePerf, v0BusyTablePerf, vlBusyTablePerf).flatten(_.getPerfEvents)
  generatePerfEvent()
}