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-rw-r--r--frontends/liberty/liberty.cc10
1 files changed, 8 insertions, 2 deletions
diff --git a/frontends/liberty/liberty.cc b/frontends/liberty/liberty.cc
index 0a5bd84de..66db43baf 100644
--- a/frontends/liberty/liberty.cc
+++ b/frontends/liberty/liberty.cc
@@ -634,9 +634,12 @@ struct LibertyFrontend : public Frontend {
}
}
- for (auto node : cell->children)
+ if (!flag_lib)
{
- if (!flag_lib) {
+ // some liberty files do not put ff/latch at the beginning of a cell
+ // try to find "ff" or "latch" and create FF/latch _before_ processing all other nodes
+ for (auto node : cell->children)
+ {
if (node->id == "ff" && node->args.size() == 2)
create_ff(module, node);
if (node->id == "latch" && node->args.size() == 2)
@@ -645,7 +648,10 @@ struct LibertyFrontend : public Frontend {
goto skip_cell;
}
}
+ }
+ for (auto node : cell->children)
+ {
if (node->id == "pin" && node->args.size() == 1)
{
LibertyAst *dir = node->find("direction");