Merge pull request #39 from ucb-bar/coresplit

Break Core.scala into bite-sized pieces

1 files changed, 31 insertions, 0 deletions

diff --git a/src/main/scala/Chisel/Cat.scala b/src/main/scala/Chisel/Cat.scala
new file mode 100644
index 00000000..8075c11d
--- /dev/null
+++ b/src/main/scala/Chisel/Cat.scala
@@ -0,0 +1,31 @@
+// See LICENSE for license details.
+
+package Chisel
+import Builder.pushOp
+import PrimOp._
+
+// REVIEW TODO: Should the FIRRTL emission be part of Bits, with a separate
+// Cat in stdlib that can do a reduction among multiple elements?
+object Cat {
+  /** Combine data elements together
+    * @param a Data to combine with
+    * @param r any number of other Data elements to be combined in order
+    * @return A UInt which is all of the bits combined together
+    */
+  def apply[T <: Bits](a: T, r: T*): UInt = apply(a :: r.toList)
+
+  /** Combine data elements together
+    * @param r any number of other Data elements to be combined in order
+    * @return A UInt which is all of the bits combined together
+    */
+  def apply[T <: Bits](r: Seq[T]): UInt = {
+    if (r.tail.isEmpty) {
+      r.head.asUInt
+    } else {
+      val left = apply(r.slice(0, r.length/2))
+      val right = apply(r.slice(r.length/2, r.length))
+      val w = left.width + right.width
+      pushOp(DefPrim(UInt(w), ConcatOp, left.ref, right.ref))
+    }
+  }
+}