From: Clifford Wolf <clifford@clifford.at>
Date: Thu, 5 Apr 2018 09:01:32 +0000 (+0200)
Subject: Added missing dont_use handling for SR FFs to dfflibmap
X-Git-Tag: yosys-0.8~127
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=705c366a91aab577858d9f45f1ebad28b8db1523;p=yosys.git

Added missing dont_use handling for SR FFs to dfflibmap

Signed-off-by: Clifford Wolf <clifford@clifford.at>
---

diff --git a/passes/techmap/dfflibmap.cc b/passes/techmap/dfflibmap.cc
index 4cb1489a8..5ccb770c4 100644
--- a/passes/techmap/dfflibmap.cc
+++ b/passes/techmap/dfflibmap.cc
@@ -240,6 +240,10 @@ static void find_cell_sr(LibertyAst *ast, std::string cell_type, bool clkpol, bo
 		if (cell->id != "cell" || cell->args.size() != 1)
 			continue;
 
+		LibertyAst *dn = cell->find("dont_use");
+		if (dn != NULL && dn->value == "true")
+			continue;
+
 		LibertyAst *ff = cell->find("ff");
 		if (ff == NULL)
 			continue;