From 7a9fdb5fc34ca0fa33a20e338c8f0a84cd4f8f96 Mon Sep 17 00:00:00 2001
From: Alex Forencich <alex@alexforencich.com>
Date: Mon, 9 Nov 2015 14:54:14 -0800
Subject: [PATCH] Add default case statements to avoid inferring latches

---
 rtl/axis_demux.py     | 4 ++++
 rtl/axis_demux_4.v    | 4 ++++
 rtl/axis_demux_64.py  | 4 ++++
 rtl/axis_demux_64_4.v | 4 ++++
 rtl/axis_mux.py       | 8 ++++++++
 rtl/axis_mux_4.v      | 8 ++++++++
 rtl/axis_mux_64.py    | 9 +++++++++
 rtl/axis_mux_64_4.v   | 9 +++++++++
 8 files changed, 50 insertions(+)

diff --git a/rtl/axis_demux.py b/rtl/axis_demux.py
index 28bb7ed2..71b37dba 100755
--- a/rtl/axis_demux.py
+++ b/rtl/axis_demux.py
@@ -129,6 +129,10 @@ always @* begin
             current_output_tready = output_{{p}}_axis_tready;
         end
 {%- endfor %}
+        default: begin
+            current_output_tvalid = 1'b0;
+            current_output_tready = 1'b0;
+        end
     endcase
 end
 
diff --git a/rtl/axis_demux_4.v b/rtl/axis_demux_4.v
index 6b853aeb..9d5b8310 100644
--- a/rtl/axis_demux_4.v
+++ b/rtl/axis_demux_4.v
@@ -116,6 +116,10 @@ always @* begin
             current_output_tvalid = output_3_axis_tvalid;
             current_output_tready = output_3_axis_tready;
         end
+        default: begin
+            current_output_tvalid = 1'b0;
+            current_output_tready = 1'b0;
+        end
     endcase
 end
 
diff --git a/rtl/axis_demux_64.py b/rtl/axis_demux_64.py
index 898bb6e6..d3f6294f 100755
--- a/rtl/axis_demux_64.py
+++ b/rtl/axis_demux_64.py
@@ -133,6 +133,10 @@ always @* begin
             current_output_tready = output_{{p}}_axis_tready;
         end
 {%- endfor %}
+        default: begin
+            current_output_tvalid = 1'b0;
+            current_output_tready = 1'b0;
+        end
     endcase
 end
 
diff --git a/rtl/axis_demux_64_4.v b/rtl/axis_demux_64_4.v
index 489ce179..f4bb51fc 100644
--- a/rtl/axis_demux_64_4.v
+++ b/rtl/axis_demux_64_4.v
@@ -123,6 +123,10 @@ always @* begin
             current_output_tvalid = output_3_axis_tvalid;
             current_output_tready = output_3_axis_tready;
         end
+        default: begin
+            current_output_tvalid = 1'b0;
+            current_output_tready = 1'b0;
+        end
     endcase
 end
 
diff --git a/rtl/axis_mux.py b/rtl/axis_mux.py
index 4d3550e1..95c2ada0 100755
--- a/rtl/axis_mux.py
+++ b/rtl/axis_mux.py
@@ -127,6 +127,7 @@ always @* begin
 {%- for p in ports %}
         {{w}}'d{{p}}: selected_input_tvalid = input_{{p}}_axis_tvalid;
 {%- endfor %}
+        default: selected_input_tvalid = 1'b0;
     endcase
 end
 
@@ -147,6 +148,13 @@ always @* begin
             current_input_tuser = input_{{p}}_axis_tuser;
         end
 {%- endfor %}
+        default: begin
+            current_input_tdata = {DATA_WIDTH{1'b0}};
+            current_input_tvalid = 1'b0;
+            current_input_tready = 1'b0;
+            current_input_tlast = 1'b0;
+            current_input_tuser = 1'b0;
+        end
     endcase
 end
 
diff --git a/rtl/axis_mux_4.v b/rtl/axis_mux_4.v
index 319acfd9..b52c17e9 100644
--- a/rtl/axis_mux_4.v
+++ b/rtl/axis_mux_4.v
@@ -109,6 +109,7 @@ always @* begin
         2'd1: selected_input_tvalid = input_1_axis_tvalid;
         2'd2: selected_input_tvalid = input_2_axis_tvalid;
         2'd3: selected_input_tvalid = input_3_axis_tvalid;
+        default: selected_input_tvalid = 1'b0;
     endcase
 end
 
@@ -148,6 +149,13 @@ always @* begin
             current_input_tlast = input_3_axis_tlast;
             current_input_tuser = input_3_axis_tuser;
         end
+        default: begin
+            current_input_tdata = {DATA_WIDTH{1'b0}};
+            current_input_tvalid = 1'b0;
+            current_input_tready = 1'b0;
+            current_input_tlast = 1'b0;
+            current_input_tuser = 1'b0;
+        end
     endcase
 end
 
diff --git a/rtl/axis_mux_64.py b/rtl/axis_mux_64.py
index e38d19a9..bd3b27f3 100755
--- a/rtl/axis_mux_64.py
+++ b/rtl/axis_mux_64.py
@@ -131,6 +131,7 @@ always @* begin
 {%- for p in ports %}
         {{w}}'d{{p}}: selected_input_tvalid = input_{{p}}_axis_tvalid;
 {%- endfor %}
+        default: selected_input_tvalid = 1'b0;
     endcase
 end
 
@@ -153,6 +154,14 @@ always @* begin
             current_input_tuser = input_{{p}}_axis_tuser;
         end
 {%- endfor %}
+        default: begin
+            current_input_tdata = {DATA_WIDTH{1'b0}};
+            current_input_tkeep = {KEEP_WIDTH{1'b0}};
+            current_input_tvalid = 1'b0;
+            current_input_tready = 1'b0;
+            current_input_tlast = 1'b0;
+            current_input_tuser = 1'b0;
+        end
     endcase
 end
 
diff --git a/rtl/axis_mux_64_4.v b/rtl/axis_mux_64_4.v
index 5e798aa3..11ee9aeb 100644
--- a/rtl/axis_mux_64_4.v
+++ b/rtl/axis_mux_64_4.v
@@ -116,6 +116,7 @@ always @* begin
         2'd1: selected_input_tvalid = input_1_axis_tvalid;
         2'd2: selected_input_tvalid = input_2_axis_tvalid;
         2'd3: selected_input_tvalid = input_3_axis_tvalid;
+        default: selected_input_tvalid = 1'b0;
     endcase
 end
 
@@ -160,6 +161,14 @@ always @* begin
             current_input_tlast = input_3_axis_tlast;
             current_input_tuser = input_3_axis_tuser;
         end
+        default: begin
+            current_input_tdata = {DATA_WIDTH{1'b0}};
+            current_input_tkeep = {KEEP_WIDTH{1'b0}};
+            current_input_tvalid = 1'b0;
+            current_input_tready = 1'b0;
+            current_input_tlast = 1'b0;
+            current_input_tuser = 1'b0;
+        end
     endcase
 end