From 28aa7b00eec85e714081f13c849559202be04560 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Povi=C5=A1er?= <povik@cutebit.org>
Date: Mon, 21 Oct 2024 19:38:17 +0200
Subject: [PATCH] read_liberty: Start an `-ignore_busses` option

---
 frontends/liberty/liberty.cc | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/frontends/liberty/liberty.cc b/frontends/liberty/liberty.cc
index 5a6b54f98..05d6e5b44 100644
--- a/frontends/liberty/liberty.cc
+++ b/frontends/liberty/liberty.cc
@@ -462,6 +462,9 @@ struct LibertyFrontend : public Frontend {
 		log("    -ignore_miss_data_latch\n");
 		log("        ignore latches with missing data and/or enable pins\n");
 		log("\n");
+		log("    -ignore_busses\n");
+		log("        ignore cells with bus interfaces (wide ports)\n");
+		log("\n");
 		log("    -setattr <attribute_name>\n");
 		log("        set the specified attribute (to the value 1) on all loaded modules\n");
 		log("\n");
@@ -478,6 +481,7 @@ struct LibertyFrontend : public Frontend {
 		bool flag_ignore_miss_func = false;
 		bool flag_ignore_miss_dir  = false;
 		bool flag_ignore_miss_data_latch = false;
+		bool flag_ignore_busses = false;
 		bool flag_unit_delay = false;
 		std::vector<std::string> attributes;
 
@@ -514,6 +518,10 @@ struct LibertyFrontend : public Frontend {
 				flag_ignore_miss_data_latch = true;
 				continue;
 			}
+			if (arg == "-ignore_busses") {
+				flag_ignore_busses = true;
+				continue;
+			}
 			if (arg == "-setattr" && argidx+1 < args.size()) {
 				attributes.push_back(RTLIL::escape_id(args[++argidx]));
 				continue;
@@ -585,6 +593,12 @@ struct LibertyFrontend : public Frontend {
 
 				if (node->id == "bus" && node->args.size() == 1)
 				{
+					if (flag_ignore_busses) {
+						log("Ignoring cell %s with a bus interface %s.\n", log_id(module->name), node->args.at(0).c_str());
+						delete module;
+						goto skip_cell;
+					}
+
 					if (!flag_lib)
 						log_error("Error in cell %s: bus interfaces are only supported in -lib mode.\n", log_id(cell_name));