From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Wed, 16 Oct 2019 01:05:36 +0000 (+1100)
Subject: writeback: Remove a mux leg on data_in
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=858b1e7930a4f0f211310684481dfab8c86c8261;p=microwatt.git

writeback: Remove a mux leg on data_in

Initialize to 0 forces the mux to have an extra leg fed with zeros.

Instead initialize data_in to one of the mux inputs

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

diff --git a/writeback.vhdl b/writeback.vhdl
index 042ad59..ab7b6c7 100644
--- a/writeback.vhdl
+++ b/writeback.vhdl
@@ -95,7 +95,7 @@ begin
         partial_write <= '0';
         sign_extend <= '0';
         second_word <= '0';
-        data_in <= (others => '0');
+        data_in <= e_in.write_data;
 
         if e_in.write_enable = '1' then
             w_out.write_reg <= e_in.write_reg;