From adb483ddfd3163a4efa08e09a35dd926377aa71d Mon Sep 17 00:00:00 2001
From: Vamsi K Vytla <vamsi.vytla@gmail.com>
Date: Mon, 27 Apr 2020 10:36:18 -0700
Subject: [PATCH] frontends/json/jsonparse.cc: Like the upto field read_json
 can also read the signedness of a wire

---
 frontends/json/jsonparse.cc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/frontends/json/jsonparse.cc b/frontends/json/jsonparse.cc
index 7aceffbfc..8ae7c6578 100644
--- a/frontends/json/jsonparse.cc
+++ b/frontends/json/jsonparse.cc
@@ -309,6 +309,12 @@ void json_import(Design *design, string &modname, JsonNode *node)
 					port_wire->upto = val->data_number != 0;
 			}
 
+			if (port_node->data_dict.count("signed") != 0) {
+				JsonNode *val = port_node->data_dict.at("signed");
+				if (val->type == 'N')
+					port_wire->is_signed = val->data_number != 0;
+			}
+
 			if (port_node->data_dict.count("offset") != 0) {
 				JsonNode *val = port_node->data_dict.at("offset");
 				if (val->type == 'N')
@@ -573,4 +579,3 @@ struct JsonFrontend : public Frontend {
 } JsonFrontend;
 
 YOSYS_NAMESPACE_END
-
-- 
2.30.2