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 4cb1489a828715c8dcd947a291fcfd019e02bc56..5ccb770c4796716d3daf2014260595e6629e1eae 100644 (file)
--- 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;