import chisel3._
import chisel3.util._

class ReservationStation(p: CoreParams = CoreParams(), entries: Int = 16) extends Module {
  val io = IO(new Bundle {
    val enqValid = Input(Bool())
    val enq = Input(new RenamePacket(p))
    val enqReady = Output(Bool())
    val issueValid = Output(Bool())
    val issue = Output(new RenamePacket(p))
    val issueReady = Input(Bool())
    val flush = Input(Bool())
  })

  val q = Module(new Queue(new RenamePacket(p), entries, flow = false, pipe = true))
  q.io.enq.valid := io.enqValid
  q.io.enq.bits := io.enq
  q.io.deq.ready := io.issueReady || io.flush

  io.enqReady := q.io.enq.ready
  io.issueValid := q.io.deq.valid && !io.flush
  io.issue := q.io.deq.bits
}