write_xaiger: make more robust, update doc

backends/aiger/xaiger.cc

@@ -847,17 +847,13 @@ struct XAigerWriter
 		module->design->scratchpad_set_int("write_xaiger.num_outputs", output_bits.size());
 	}
 
-	void write_map(std::ostream &f, bool verbose_map)
+	void write_map(std::ostream &f)
 	{
 		dict<int, string> input_lines;
 		dict<int, string> output_lines;
-		dict<int, string> wire_lines;
 
 		for (auto wire : module->wires())
 		{
-			//if (!verbose_map && wire->name[0] == '$')
-			//	continue;
-
 			SigSpec sig = sigmap(wire);
 
 			for (int i = 0; i < GetSize(wire); i++)
@@ -875,14 +871,6 @@ struct XAigerWriter
 					output_lines[o] += stringf("output %d %d %s %d\n", o - GetSize(co_bits), i, log_id(wire), init);
 					continue;
 				}
-
-				if (verbose_map) {
-					if (aig_map.count(sig[i]) == 0)
-						continue;
-
-					int a = aig_map.at(sig[i]);
-					wire_lines[a] += stringf("wire %d %d %s\n", a, i, log_id(wire));
-				}
 			}
 		}
 
@@ -899,10 +887,6 @@ struct XAigerWriter
 		for (auto &it : output_lines)
 			f << it.second;
 		log_assert(output_lines.size() == output_bits.size());
-
-		wire_lines.sort();
-		for (auto &it : wire_lines)
-			f << it.second;
 	}
 };
 
@@ -914,8 +898,10 @@ struct XAigerBackend : public Backend {
 		log("\n");
 		log("    write_xaiger [options] [filename]\n");
 		log("\n");
-		log("Write the current design to an XAIGER file. The design must be flattened and\n");
+		log("Write the top module (according to the (* top *) attribute or if only one module\n");
-		log("all unsupported cells will be converted into psuedo-inputs and pseudo-outputs.\n");
+		log("is currently selected) to an XAIGER file. Any non $_NOT_, $_AND_, $_ABC9_FF_, or");
+		log("non (* abc9_box_id *) cells will be converted into psuedo-inputs and\n");
+		log("pseudo-outputs.\n");
 		log("\n");
 		log("    -ascii\n");
 		log("        write ASCII version of AIGER format\n");
@@ -923,14 +909,10 @@ struct XAigerBackend : public Backend {
 		log("    -map <filename>\n");
 		log("        write an extra file with port and box symbols\n");
 		log("\n");
-		log("    -vmap <filename>\n");
-		log("        like -map, but more verbose\n");
-		log("\n");
 	}
 	void execute(std::ostream *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
 	{
 		bool ascii_mode = false;
-		bool verbose_map = false;
 		std::string map_filename;
 
 		log_header(design, "Executing XAIGER backend.\n");
@@ -946,11 +928,6 @@ struct XAigerBackend : public Backend {
 				map_filename = args[++argidx];
 				continue;
 			}
-			if (map_filename.empty() && args[argidx] == "-vmap" && argidx+1 < args.size()) {
-				map_filename = args[++argidx];
-				verbose_map = true;
-				continue;
-			}
 			break;
 		}
 		extra_args(f, filename, args, argidx, !ascii_mode);
@@ -960,6 +937,14 @@ struct XAigerBackend : public Backend {
 		if (top_module == nullptr)
 			log_error("Can't find top module in current design!\n");
 
+		if (!design->selected_whole_module(top_module))
+			log_cmd_error("Can't handle partially selected module %s!\n", log_id(top_module));
+
+		if (!top_module->processes.empty())
+			log_error("Found unmapped processes in module %s: unmapped processes are not supported in XAIGER backend!\n", log_id(top_module));
+		if (!top_module->memories.empty())
+			log_error("Found unmapped memories in module %s: unmapped memories are not supported in XAIGER backend!\n", log_id(top_module));
+
 		XAigerWriter writer(top_module);
 		writer.write_aiger(*f, ascii_mode);
 
@@ -968,7 +953,7 @@ struct XAigerBackend : public Backend {
 			mapf.open(map_filename.c_str(), std::ofstream::trunc);
 			if (mapf.fail())
 				log_error("Can't open file `%s' for writing: %s\n", map_filename.c_str(), strerror(errno));
-			writer.write_map(mapf, verbose_map);
+			writer.write_map(mapf);
 		}
 	}
 } XAigerBackend;