From: Patrick Urban <patrick.urban@web.de>
Date: Fri, 24 Sep 2021 19:52:09 +0000 (+0200)
Subject: synth_gatemate: Registers are uninitialized
X-Git-Tag: yosys-0.12~26
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6825de6343e2b104ccad3d9ae6bf657deb80014e;p=yosys.git

synth_gatemate: Registers are uninitialized
---

diff --git a/techlibs/gatemate/cells_sim.v b/techlibs/gatemate/cells_sim.v
index 0c9287b81..c1cacc6d1 100644
--- a/techlibs/gatemate/cells_sim.v
+++ b/techlibs/gatemate/cells_sim.v
@@ -294,7 +294,7 @@ module CC_DFF #(
 	assign en  = (EN_INV)  ?  ~EN :  EN;
 	assign sr  = (SR_INV)  ?  ~SR :  SR;
 
-	initial Q = 1'b0;
+	initial Q = 1'bX;
 
 	always @(posedge clk or posedge sr)
 	begin
@@ -323,7 +323,7 @@ module CC_DLT #(
 	assign en  = (G_INV) ? ~G : G;
 	assign sr  = (SR_INV) ? ~SR : SR;
 
-	initial Q = 1'b0;
+	initial Q = 1'bX;
 
 	always @(*)
 	begin
diff --git a/techlibs/gatemate/synth_gatemate.cc b/techlibs/gatemate/synth_gatemate.cc
index 27a2b5bfa..b570e1e2a 100644
--- a/techlibs/gatemate/synth_gatemate.cc
+++ b/techlibs/gatemate/synth_gatemate.cc
@@ -305,7 +305,7 @@ struct SynthGateMatePass : public ScriptPass
 		if (check_label("map_regs"))
 		{
 			run("opt_clean");
-			run("dfflegalize -cell $_DFFE_????_ 0 -cell $_DLATCH_???_ 0");
+			run("dfflegalize -cell $_DFFE_????_ x -cell $_DLATCH_???_ x");
 			run("techmap -map +/gatemate/reg_map.v");
 			run("opt_expr -mux_undef");
 			run("simplemap");