Fixed dfflibmap for cell libraries with no set-reset-ff

diff --git a/passes/techmap/dfflibmap.cc b/passes/techmap/dfflibmap.cc
index 23d93353fcb44cd2d39e491604d50745567179d1..fd5fa86e17863c04ec37ec2bcb62f4fefc175c96 100644 (file)
--- a/passes/techmap/dfflibmap.cc
+++ b/passes/techmap/dfflibmap.cc
@@ -342,7 +342,7 @@ static bool expand_cellmap(std::string pattern, std::string inv)
 
 static void map_sr_to_arst(const char *from, const char *to)
 {
-       if (cell_mappings.count(to) > 0)
+       if (!cell_mappings.count(from) || cell_mappings.count(to) > 0)
                return;
 
        char from_clk_pol = from[8], from_set_pol = from[9], from_clr_pol = from[10];