From ee6702e5e007ee1fd291c79309a5f6cb8389b6a0 Mon Sep 17 00:00:00 2001
From: Andrew Waterman <andrew@sifive.com>
Date: Wed, 26 Apr 2017 12:19:21 -0700
Subject: [PATCH] Support indexing 1-entry Seqs

It's a zero-width wire special case.

Closes #706.
---
 src/main/scala/util/Package.scala | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/scala/util/Package.scala b/src/main/scala/util/Package.scala
index 85667677..33907996 100644
--- a/src/main/scala/util/Package.scala
+++ b/src/main/scala/util/Package.scala
@@ -11,7 +11,9 @@ package object util {
 
   implicit class SeqToAugmentedSeq[T <: Data](val x: Seq[T]) extends AnyVal {
     def apply(idx: UInt): T = {
-      if (!isPow2(x.size)) {
+      if (x.size == 1) {
+        x.head
+      } else if (!isPow2(x.size)) {
         // For non-power-of-2 seqs, reflect elements to simplify decoder
         (x ++ x.takeRight(x.size & -x.size)).toSeq(idx)
       } else {