From 6c34949c45cf7ddfdabafb749de2cb9e439b381e Mon Sep 17 00:00:00 2001
From: ducky
Date: Mon, 26 Oct 2015 17:30:15 -0700
Subject: Break out Utils.scala into smaller portions

---
 src/main/scala/Chisel/util/Lookup.scala | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 src/main/scala/Chisel/util/Lookup.scala

(limited to 'src/main/scala/Chisel/util/Lookup.scala')

diff --git a/src/main/scala/Chisel/util/Lookup.scala b/src/main/scala/Chisel/util/Lookup.scala
new file mode 100644
index 00000000..54922fc4
--- /dev/null
+++ b/src/main/scala/Chisel/util/Lookup.scala
@@ -0,0 +1,17 @@
+// See LICENSE for license details.
+
+package Chisel
+
+object ListLookup {
+  def apply[T <: Data](addr: UInt, default: List[T], mapping: Array[(BitPat, List[T])]): List[T] = {
+    val map = mapping.map(m => (m._1 === addr, m._2))
+    default.zipWithIndex map { case (d, i) =>
+      map.foldRight(d)((m, n) => Mux(m._1, m._2(i), n))
+    }
+  }
+}
+
+object Lookup {
+  def apply[T <: Bits](addr: UInt, default: T, mapping: Seq[(BitPat, T)]): T =
+    ListLookup(addr, List(default), mapping.map(m => (m._1, List(m._2))).toArray).head
+}
-- 
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