From fb39f7dc372b5836f02d8d7964f5fcc6a38f8747 Mon Sep 17 00:00:00 2001
From: Andrew Waterman
Date: Thu, 7 Jul 2016 00:11:15 -0700
Subject: Avoid needlessly creating Vecs

---
 src/main/scala/chisel3/util/Bitwise.scala | 2 +-
 src/main/scala/chisel3/util/OneHot.scala  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main/scala/chisel3/util/Bitwise.scala b/src/main/scala/chisel3/util/Bitwise.scala
index ab1ff550..7f295200 100644
--- a/src/main/scala/chisel3/util/Bitwise.scala
+++ b/src/main/scala/chisel3/util/Bitwise.scala
@@ -11,7 +11,7 @@ import chisel3.core.SeqUtils
 object FillInterleaved
 {
   def apply(n: Int, in: UInt): UInt = apply(n, in.toBools)
-  def apply(n: Int, in: Seq[Bool]): UInt = Vec(in.map(Fill(n, _))).toBits
+  def apply(n: Int, in: Seq[Bool]): UInt = Cat(in.map(Fill(n, _)).reverse)
 }
 
 /** Returns the number of bits set (i.e value is 1) in the input signal.
diff --git a/src/main/scala/chisel3/util/OneHot.scala b/src/main/scala/chisel3/util/OneHot.scala
index 820c72d6..abede61e 100644
--- a/src/main/scala/chisel3/util/OneHot.scala
+++ b/src/main/scala/chisel3/util/OneHot.scala
@@ -10,7 +10,7 @@ import chisel3._
 /** Converts from One Hot Encoding to a UInt indicating which bit is active
   * This is the inverse of [[Chisel.UIntToOH UIntToOH]]*/
 object OHToUInt {
-  def apply(in: Seq[Bool]): UInt = apply(Vec(in))
+  def apply(in: Seq[Bool]): UInt = apply(Cat(in.reverse), in.size)
   def apply(in: Vec[Bool]): UInt = apply(in.toBits, in.size)
   def apply(in: Bits): UInt = apply(in, in.getWidth)
 
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