From 52168a5f3edee6c427a2bf4e1fd033259b46ac9e Mon Sep 17 00:00:00 2001
From: Andrew Waterman
Date: Thu, 14 Mar 2019 02:04:34 -0700
Subject: Fix PopCount width

---
 chiselFrontend/src/main/scala/chisel3/core/SeqUtils.scala | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'chiselFrontend')

diff --git a/chiselFrontend/src/main/scala/chisel3/core/SeqUtils.scala b/chiselFrontend/src/main/scala/chisel3/core/SeqUtils.scala
index e87fb045..f15fb178 100644
--- a/chiselFrontend/src/main/scala/chisel3/core/SeqUtils.scala
+++ b/chiselFrontend/src/main/scala/chisel3/core/SeqUtils.scala
@@ -37,7 +37,9 @@ private[chisel3] object SeqUtils {
   def do_count(in: Seq[Bool])(implicit sourceInfo: SourceInfo, compileOptions: CompileOptions): UInt = in.size match {
     case 0 => 0.U
     case 1 => in.head
-    case n => count(in take n/2) +& count(in drop n/2)
+    case n =>
+      val sum = count(in take n/2) +& count(in drop n/2)
+      sum(BigInt(n).bitLength - 1, 0)
   }
 
   /** Returns the data value corresponding to the first true predicate.
-- 
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