d_valid need not be created if stage_ctl is set

diff --git a/src/add/singlepipe.py b/src/add/singlepipe.py
index 0c198aa7ce4ff41c491b353509aa1d413b57f4ba..7f3abc211846f9375d736a013130897c9a61dae0 100644 (file)
--- a/src/add/singlepipe.py
+++ b/src/add/singlepipe.py
@@ -223,7 +223,8 @@ class NextControl:
         self.o_valid = Signal(name="n_o_valid") # self out>>  next
         self.i_ready = Signal(name="n_i_ready") # self <<in   next
         self.o_data = None # XXX MUST BE ADDED BY USER
-        self.d_valid = Signal(reset=1) # INTERNAL (data valid)
+        if self.stage_ctl:
+            self.d_valid = Signal(reset=1) # INTERNAL (data valid)
 
     @property
     def i_ready_test(self):