From 94be48d7e5cdb44474a08d786d9baaefe825ecfe Mon Sep 17 00:00:00 2001
From: Jack Koenig
Date: Fri, 6 Jul 2018 17:07:19 -0700
Subject: Undeprecate log2Up and log2Down (#846)

They should not be deprecated until zero-width wires actually work---
 src/main/scala/chisel3/util/Math.scala | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/main/scala/chisel3/util/Math.scala b/src/main/scala/chisel3/util/Math.scala
index 3884ea21..0e1b36d5 100644
--- a/src/main/scala/chisel3/util/Math.scala
+++ b/src/main/scala/chisel3/util/Math.scala
@@ -10,8 +10,10 @@ import chisel3.internal.chiselRuntimeDeprecated
 
 /** Compute the log2 rounded up with min value of 1 */
 object log2Up {
-  @chiselRuntimeDeprecated
-  @deprecated("Use log2Ceil instead", "chisel3")
+  // Do not deprecate until zero-width wires fully work:
+  // https://github.com/freechipsproject/chisel3/issues/847
+  //@chiselRuntimeDeprecated
+  //@deprecated("Use log2Ceil instead", "chisel3")
   def apply(in: BigInt): Int = Chisel.log2Up(in)
 }
 
@@ -26,8 +28,10 @@ object log2Ceil {
 
 /** Compute the log2 rounded down with min value of 1 */
 object log2Down {
-  @chiselRuntimeDeprecated
-  @deprecated("Use log2Floor instead", "chisel3")
+  // Do not deprecate until zero-width wires fully work:
+  // https://github.com/freechipsproject/chisel3/issues/847
+  //@chiselRuntimeDeprecated
+  //@deprecated("Use log2Floor instead", "chisel3")
   def apply(in: BigInt): Int = Chisel.log2Down(in)
 }
 
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