From 7764d0ba1dcf064ae487ee985c43083a0909e7f4 Mon Sep 17 00:00:00 2001
From: Clifford Wolf <clifford@clifford.at>
Date: Sat, 5 Jan 2013 11:13:26 +0100
Subject: initial import

---
 passes/fsm/fsm_export.cc | 103 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 passes/fsm/fsm_export.cc

(limited to 'passes/fsm/fsm_export.cc')

diff --git a/passes/fsm/fsm_export.cc b/passes/fsm/fsm_export.cc
new file mode 100644
index 00000000..0219f4eb
--- /dev/null
+++ b/passes/fsm/fsm_export.cc
@@ -0,0 +1,103 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *  Copyright (C) 2012  Martin Schmölzer <martin@schmoelzer.at>
+ *  
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *  
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "kernel/log.h"
+#include "kernel/register.h"
+#include "kernel/sigtools.h"
+#include "kernel/consteval.h"
+#include "kernel/celltypes.h"
+#include "fsmdata.h"
+#include <string>
+#include <iostream>
+#include <fstream>
+
+/**
+ * Convert signal into a KISS-compatible textual representation.
+ */
+std::string kiss_convert_signal(const RTLIL::SigSpec &sig) {
+	if (!sig.is_fully_const()) {
+		throw 0;
+	}
+
+	return sig.as_const().as_string();
+}
+
+/**
+ * Exports each Finite State Machine (FSM) in the design to a file in KISS2 format.
+ */
+struct FsmExportPass : public Pass {
+	FsmExportPass() : Pass("fsm_export") {
+	}
+
+	virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
+	{
+		FsmData       fsm_data;
+		std::string   kiss_name;
+		std::ofstream kiss_file;
+		size_t        i;
+		FsmData::transition_t tr;
+
+		log_header("Executing FSM_EXPORT pass (exporting FSMs in KISS2 file format).\n");
+		extra_args(args, 1, design);
+
+		for (auto &mod_it : design->modules)
+			for (auto &cell_it : mod_it.second->cells)
+				if (cell_it.second->type == "$fsm") {
+					kiss_name.assign(mod_it.first.c_str());
+					kiss_name.append("-" + cell_it.second->name + ".kiss2");
+					fsm_data.copy_from_cell(cell_it.second);
+
+					log("\n");
+					log("Exporting FSM `%s' from module `%s' to file `%s'.\n",
+							cell_it.second->name.c_str(),
+							mod_it.first.c_str(),
+							kiss_name.c_str());
+
+					kiss_file.open(kiss_name, std::ios::out | std::ios::trunc);
+
+					if (!kiss_file.is_open()) {
+						log_error("Could not open file \"%s\" with write access.\n", kiss_name.c_str());
+						return;
+					}
+
+					kiss_file << ".start_kiss" << std::endl;
+					kiss_file << ".i " << std::dec << fsm_data.num_inputs << std::endl;
+					kiss_file << ".o " << std::dec << fsm_data.num_outputs << std::endl;
+					kiss_file << ".r s" << std::dec << fsm_data.reset_state << std::endl;
+
+					for (i = 0; i < fsm_data.transition_table.size(); i++) {
+						tr = fsm_data.transition_table[i];
+
+						try {
+							kiss_file << kiss_convert_signal(tr.ctrl_in) << ' ';
+							kiss_file << 's' << tr.state_in << ' ';
+							kiss_file << 's' << tr.state_out << ' ';
+							kiss_file << kiss_convert_signal(tr.ctrl_out) << std::endl;
+						}
+						catch (int) {
+							log_error("exporting an FSM input or output signal failed.\n");
+						}
+					}
+
+					kiss_file << ".end_kiss" << std::endl << ".end" << std::endl;
+					kiss_file.close();
+				}
+	}
+} FsmExportPass;
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