Initial Chisel core implementation

src/main/scala/issue/ReservationStation.scala

@@ -0,0 +1,24 @@
+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
+}
+