initial import

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diff --git a/backends/verilog/verilog_backend.h b/backends/verilog/verilog_backend.h
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+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.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.
+ *
+ *  ---
+ *
+ *  A simple and straightforward verilog backend.
+ *
+ *  Note that RTLIL processes can't always be mapped easily to a Verilog
+ *  process. Therefore this frontend should only be used to export a
+ *  Verilog netlist (i.e. after the "proc" pass has converted all processes
+ *  to logic networks and registers).
+ *
+ */
+
+#ifndef VERILOG_BACKEND_H
+#define VERILOG_BACKEND_H
+
+#include "kernel/rtlil.h"
+#include <stdio.h>
+
+namespace VERILOG_BACKEND {
+	void verilog_backend(FILE *f, std::vector<std::string> args, RTLIL::Design *design);
+}
+
+#endif