From c5f9ea3133ef363ff8944e17d94fea79767b6bed Mon Sep 17 00:00:00 2001
From: Jim Lawson
Date: Wed, 6 Jul 2016 10:01:23 -0700
Subject: Rename "Chisel" to "chisel3" (only git mv).

---
 src/main/scala/chisel3/util/Valid.scala | 59 +++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 src/main/scala/chisel3/util/Valid.scala

(limited to 'src/main/scala/chisel3/util/Valid.scala')

diff --git a/src/main/scala/chisel3/util/Valid.scala b/src/main/scala/chisel3/util/Valid.scala
new file mode 100644
index 00000000..9e2202bb
--- /dev/null
+++ b/src/main/scala/chisel3/util/Valid.scala
@@ -0,0 +1,59 @@
+// See LICENSE for license details.
+
+/** Wrappers for valid interfaces and associated circuit generators using them.
+  */
+
+package Chisel
+
+/** An I/O Bundle containing data and a signal determining if it is valid */
+class ValidIO[+T <: Data](gen2: T) extends Bundle
+{
+  val valid = Bool(OUTPUT)
+  val bits = gen2.cloneType.asOutput
+  def fire(dummy: Int = 0): Bool = valid
+  override def cloneType: this.type = new ValidIO(gen2).asInstanceOf[this.type]
+}
+
+/** Adds a valid protocol to any interface. The standard used is
+  that the consumer uses the flipped interface.
+*/
+object Valid {
+  def apply[T <: Data](gen: T): ValidIO[T] = new ValidIO(gen)
+}
+
+/** A hardware module that delays data coming down the pipeline
+  by the number of cycles set by the latency parameter. Functionality
+  is similar to ShiftRegister but this exposes a Pipe interface.
+
+  Example usage:
+    val pipe = new Pipe(UInt())
+    pipe.io.enq <> produce.io.out
+    consumer.io.in <> pipe.io.deq
+  */
+object Pipe
+{
+  def apply[T <: Data](enqValid: Bool, enqBits: T, latency: Int): ValidIO[T] = {
+    if (latency == 0) {
+      val out = Wire(Valid(enqBits))
+      out.valid <> enqValid
+      out.bits <> enqBits
+      out
+    } else {
+      val v = Reg(Bool(), next=enqValid, init=Bool(false))
+      val b = RegEnable(enqBits, enqValid)
+      apply(v, b, latency-1)
+    }
+  }
+  def apply[T <: Data](enqValid: Bool, enqBits: T): ValidIO[T] = apply(enqValid, enqBits, 1)
+  def apply[T <: Data](enq: ValidIO[T], latency: Int = 1): ValidIO[T] = apply(enq.valid, enq.bits, latency)
+}
+
+class Pipe[T <: Data](gen: T, latency: Int = 1) extends Module
+{
+  val io = new Bundle {
+    val enq = Valid(gen).flip
+    val deq = Valid(gen)
+  }
+
+  io.deq <> Pipe(io.enq, latency)
+}
-- 
cgit v1.2.3


From 12810b5efe6a8f872fbc1c63cdfb835ca354624f Mon Sep 17 00:00:00 2001
From: Jim Lawson
Date: Wed, 6 Jul 2016 09:31:47 -0700
Subject: Update Chisel -> chisel3 references.

---
 src/main/scala/chisel3/util/Valid.scala | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/main/scala/chisel3/util/Valid.scala')

diff --git a/src/main/scala/chisel3/util/Valid.scala b/src/main/scala/chisel3/util/Valid.scala
index 9e2202bb..78187ff6 100644
--- a/src/main/scala/chisel3/util/Valid.scala
+++ b/src/main/scala/chisel3/util/Valid.scala
@@ -3,7 +3,9 @@
 /** Wrappers for valid interfaces and associated circuit generators using them.
   */
 
-package Chisel
+package chisel3.util
+
+import chisel3._
 
 /** An I/O Bundle containing data and a signal determining if it is valid */
 class ValidIO[+T <: Data](gen2: T) extends Bundle
-- 
cgit v1.2.3


From 28e80311f172ae4d1d477e8bb47ca3719c9a8fc5 Mon Sep 17 00:00:00 2001
From: Jim Lawson
Date: Wed, 20 Jul 2016 13:28:15 -0700
Subject: Compile ok. Need to convert UInt(x) into UInt.Lit(x) or UInt.width(x)

---
 src/main/scala/chisel3/util/Valid.scala | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src/main/scala/chisel3/util/Valid.scala')

diff --git a/src/main/scala/chisel3/util/Valid.scala b/src/main/scala/chisel3/util/Valid.scala
index 4078a76a..5641f0f2 100644
--- a/src/main/scala/chisel3/util/Valid.scala
+++ b/src/main/scala/chisel3/util/Valid.scala
@@ -13,7 +13,11 @@ class Valid[+T <: Data](gen: T) extends Bundle
   val valid = Output(Bool())
   val bits  = Output(gen.cloneType)
   def fire(dummy: Int = 0): Bool = valid
-  override def cloneType: this.type = Valid(gen).asInstanceOf[this.type]
+  override def cloneType: this.type = {
+    val clone = Valid(gen).asInstanceOf[this.type]
+    clone.unBind()
+    clone
+  }
 }
 
 /** Adds a valid protocol to any interface */
-- 
cgit v1.2.3


From 7c9043859994b32bb07d2fce4ae61a7a3362a1b3 Mon Sep 17 00:00:00 2001
From: Jim Lawson
Date: Thu, 21 Jul 2016 17:12:06 -0700
Subject: Introduce chiselCloneType to distinguish from cloneType. Still fails
 one test - DirectionSpec in Direction.scala

---
 src/main/scala/chisel3/util/Valid.scala | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

(limited to 'src/main/scala/chisel3/util/Valid.scala')

diff --git a/src/main/scala/chisel3/util/Valid.scala b/src/main/scala/chisel3/util/Valid.scala
index 5641f0f2..743038f3 100644
--- a/src/main/scala/chisel3/util/Valid.scala
+++ b/src/main/scala/chisel3/util/Valid.scala
@@ -11,13 +11,9 @@ import chisel3._
 class Valid[+T <: Data](gen: T) extends Bundle
 {
   val valid = Output(Bool())
-  val bits  = Output(gen.cloneType)
+  val bits  = Output(gen.chiselCloneType)
   def fire(dummy: Int = 0): Bool = valid
-  override def cloneType: this.type = {
-    val clone = Valid(gen).asInstanceOf[this.type]
-    clone.unBind()
-    clone
-  }
+  override def cloneType: this.type = Valid(gen).asInstanceOf[this.type]
 }
 
 /** Adds a valid protocol to any interface */
-- 
cgit v1.2.3