From 1fd3ff8ecd8ac8016ec4e33816357f14f7892c29 Mon Sep 17 00:00:00 2001
From: whitequark <cz@m-labs.hk>
Date: Sun, 4 Aug 2019 13:48:33 +0000
Subject: [PATCH] vendor.xilinx_spartan_3_6: do not use retiming by default.

This was added in b404d603, probably by mistake, and is certainly
wrong given that we do not (yet) correctly mark CDC FFs.
---
 nmigen/vendor/xilinx_spartan_3_6.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/nmigen/vendor/xilinx_spartan_3_6.py b/nmigen/vendor/xilinx_spartan_3_6.py
index be0f966..fd9ce2b 100644
--- a/nmigen/vendor/xilinx_spartan_3_6.py
+++ b/nmigen/vendor/xilinx_spartan_3_6.py
@@ -101,7 +101,6 @@ class XilinxSpartan3Or6Platform(TemplatedPlatform):
             {% if platform.family in ["3", "3E", "3A"] %}
             -use_new_parser yes
             {% endif %}
-            -register_balancing yes
             -p {{platform.device}}{{platform.package}}-{{platform.speed}}
             {{get_override("script_after_run")|default("# (script_after_run placeholder)")}}
         """,
-- 
2.30.2