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diff --git a/fpga_interchange/cell_parameters.h b/fpga_interchange/cell_parameters.h
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+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2021  Symbiflow Authors
+ *
+ *
+ *  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.
+ *
+ */
+
+#ifndef CELL_PARAMETERS_H
+#define CELL_PARAMETERS_H
+
+#include <regex>
+
+#include "chipdb.h"
+#include "dynamic_bitarray.h"
+#include "hash_table.h"
+#include "nextpnr_namespaces.h"
+#include "property.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+struct Context;
+
+struct CellParameters
+{
+    CellParameters();
+    void init(const Context *ctx);
+    DynamicBitarray<> parse_int_like(const Context *ctx, IdString cell_type, IdString parameter,
+                                     const Property &property) const;
+    bool compare_property(const Context *ctx, IdString cell_type, IdString parameter, const Property &property,
+                          IdString value_to_compare) const;
+
+    HashTables::HashMap<std::pair<IdString, IdString>, const CellParameterPOD *> parameters;
+
+    std::regex verilog_binary_re;
+    std::regex verilog_hex_re;
+    std::regex c_binary_re;
+    std::regex c_hex_re;
+};
+
+NEXTPNR_NAMESPACE_END
+
+#endif /* CELL_PARAMETERS_H */