From f4f704f0239319428da6288aaefb7d46db3a3972 Mon Sep 17 00:00:00 2001
From: Andrew Waterman
Date: Thu, 16 Jul 2015 17:24:37 -0700
Subject: Add PriorityEncoderOH

---
 src/main/scala/utils.scala | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'src')

diff --git a/src/main/scala/utils.scala b/src/main/scala/utils.scala
index 0fb275d6..a86c81e8 100644
--- a/src/main/scala/utils.scala
+++ b/src/main/scala/utils.scala
@@ -398,3 +398,16 @@ object Queue
     q.io.deq
   }
 }
+
+object PriorityEncoderOH
+{
+  private def encode(in: Seq[Bool]): UInt = {
+    val outs = Vec.tabulate(in.size)(i => UInt(BigInt(1) << i, in.size))
+    PriorityMux(in :+ Bool(true), outs :+ UInt(0, in.size))
+  }
+  def apply(in: Seq[Bool]): Vec[Bool] = {
+    val enc = encode(in)
+    Vec.tabulate(in.size)(enc(_))
+  }
+  def apply(in: Bits): UInt = encode((0 until in.getWidth).map(i => in(i)))
+}
-- 
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