Revert "Merge pull request #322 from ucb-bar/deleteEnqIODeqIO"

This reverts commit 3ea7faaad0c3e349c531fabc8a75440337bdc235, reversing
changes made to 7aea39d4deac62d5477904f4bf4381c3482c41d0.

Update chisel-testers before commiting this change (deleting EnqIO/DeqIO).

2 files changed, 41 insertions, 0 deletions

diff --git a/src/main/scala/chisel3/compatibility.scala b/src/main/scala/chisel3/compatibility.scala
index d0d2ddb4..d13fcb06 100644
--- a/src/main/scala/chisel3/compatibility.scala
+++ b/src/main/scala/chisel3/compatibility.scala
@@ -158,6 +158,25 @@ package object Chisel {     // scalastyle:ignore package.object.name
   type DecoupledIO[+T <: Data] = chisel3.util.DecoupledIO[T]
   val DecoupledIO = chisel3.util.Decoupled
   val Decoupled = chisel3.util.Decoupled
+  class EnqIO[+T <: Data](gen: T) extends DecoupledIO(gen) {
+    def init(): Unit = {
+      this.noenq()
+    }
+    override def cloneType: this.type = EnqIO(gen).asInstanceOf[this.type]
+  }
+  class DeqIO[+T <: Data](gen: T) extends DecoupledIO(gen) {
+    chisel3.core.Binding.bind(this, chisel3.core.FlippedBinder, "Error: Cannot flip ")
+    def init(): Unit = {
+      this.nodeq()
+    }
+    override def cloneType: this.type = DeqIO(gen).asInstanceOf[this.type]
+  }
+  object EnqIO {
+    def apply[T<:Data](gen: T): DecoupledIO[T] = DecoupledIO(gen)
+  }
+  object DeqIO {
+    def apply[T<:Data](gen: T): DecoupledIO[T] = Flipped(DecoupledIO(gen))
+  }
   type QueueIO[T <: Data] = chisel3.util.QueueIO[T]
   type Queue[T <: Data] = chisel3.util.Queue[T]
   val Queue = chisel3.util.Queue
diff --git a/src/main/scala/chisel3/package.scala b/src/main/scala/chisel3/package.scala
index 0a57b7de..17ddd55a 100644
--- a/src/main/scala/chisel3/package.scala
+++ b/src/main/scala/chisel3/package.scala
@@ -166,6 +166,28 @@ package object chisel3 {    // scalastyle:ignore package.object.name
   val NODIR = chisel3.core.Direction.Unspecified
   type ChiselException = chisel3.internal.ChiselException
 
+  class EnqIO[+T <: Data](gen: T) extends DecoupledIO(gen) {
+    def init(): Unit = {
+      this.noenq()
+    }
+    override def cloneType: this.type = EnqIO(gen).asInstanceOf[this.type]
+  }
+  class DeqIO[+T <: Data](gen: T) extends DecoupledIO(gen) {
+    val Data = chisel3.core.Data
+    Data.setFirrtlDirection(this, Data.getFirrtlDirection(this).flip)
+    Binding.bind(this, FlippedBinder, "Error: Cannot flip ")
+    def init(): Unit = {
+      this.nodeq()
+    }
+    override def cloneType: this.type = DeqIO(gen).asInstanceOf[this.type]
+  }
+  object EnqIO {
+    def apply[T<:Data](gen: T): EnqIO[T] = new EnqIO(gen)
+  }
+  object DeqIO {
+    def apply[T<:Data](gen: T): DeqIO[T] = new DeqIO(gen)
+  }
+
   // Debugger/Tester access to internal Chisel data structures and methods.
   def getDataElements(a: Aggregate): Seq[Element] = {
     a.allElements