mirror of
				https://github.com/YosysHQ/yosys
				synced 2025-10-31 11:42:30 +00:00 
			
		
		
		
	Added "write_smt2 -bv" and other write_smt2 improvements
This commit is contained in:
		
							parent
							
								
									b6a7e21d2e
								
							
						
					
					
						commit
						1c3d51375f
					
				
					 1 changed files with 149 additions and 168 deletions
				
			
		|  | @ -32,184 +32,155 @@ struct Smt2Worker | |||
| 	CellTypes ct; | ||||
| 	SigMap sigmap; | ||||
| 	RTLIL::Module *module; | ||||
| 	bool bvmode; | ||||
| 	int idcounter; | ||||
| 
 | ||||
| 	std::vector<std::string> decls, clauses, trans; | ||||
| 	std::map<RTLIL::SigBit, std::string> bool_cache; | ||||
| 	std::map<RTLIL::IdString, std::vector<RTLIL::Cell*>> cells_by_type; | ||||
| 	std::vector<std::string> decls, trans; | ||||
| 	std::map<RTLIL::SigBit, RTLIL::Cell*> bit_driver; | ||||
| 	std::set<RTLIL::Cell*> exported_cells; | ||||
| 
 | ||||
| 	Smt2Worker(RTLIL::Module *module) : ct(module->design), sigmap(module), module(module) | ||||
| 	std::map<RTLIL::SigBit, std::pair<int, int>> fcache; | ||||
| 	std::map<int, int> bvsizes; | ||||
| 
 | ||||
| 	Smt2Worker(RTLIL::Module *module, bool bvmode) : ct(module->design), sigmap(module), module(module), bvmode(bvmode), idcounter(0) | ||||
| 	{ | ||||
| 		decls.push_back(stringf("(declare-sort |%s_s| 0)\n", log_id(module))); | ||||
| 
 | ||||
| 		for (auto cell : module->cells()) | ||||
| 		for (auto &conn : cell->connections()) { | ||||
| 			bool is_input = ct.cell_input(cell->type, conn.first); | ||||
| 			bool is_output = ct.cell_output(cell->type, conn.first); | ||||
| 			if (is_output && !is_input) | ||||
| 				for (auto bit : sigmap(conn.second)) { | ||||
| 					if (bit_driver.count(bit)) | ||||
| 						log_error("Found multiple drivers for %s.\n", log_signal(bit)); | ||||
| 					bit_driver[bit] = cell; | ||||
| 				} | ||||
| 			else if (is_output || !is_input) | ||||
| 				log_error("Unsupported or unknown directionality on port %s of cell %s.%s (%s).\n", | ||||
| 						log_id(conn.first), log_id(module), log_id(cell), log_id(cell->type)); | ||||
| 		} | ||||
| 	} | ||||
| 
 | ||||
| 	void register_bool(RTLIL::SigBit bit, int id) | ||||
| 	{ | ||||
| 		sigmap.apply(bit); | ||||
| 		log_assert(fcache.count(bit) == 0); | ||||
| 		fcache[bit] = std::pair<int, int>(id, -1); | ||||
| 	} | ||||
| 
 | ||||
| 	std::string get_bool(RTLIL::SigBit bit, const char *state_name = "state") | ||||
| 	{ | ||||
| 		sigmap.apply(bit); | ||||
| 
 | ||||
| 		if (bit.wire == nullptr) | ||||
| 			return bit.data == RTLIL::State::S1 ? "true" : "false"; | ||||
| 		if (bit_driver.count(bit)) | ||||
| 			export_cell(bit_driver.at(bit)); | ||||
| 
 | ||||
| 		if (!bool_cache.count(bit)) { | ||||
| 			std::string name = stringf("|%s_n %s %d|", log_id(module), log_id(bit.wire), bit.offset); | ||||
| 			for (auto &c : name) | ||||
| 				if (c == '\\') c = '/'; | ||||
| 			decls.push_back(stringf("(declare-fun %s (|%s_s|) Bool)\n", name.c_str(), log_id(module))); | ||||
| 			bool_cache[bit] = name; | ||||
| 		if (fcache.count(bit) == 0) { | ||||
| 			decls.push_back(stringf("(declare-fun |%s#%d| (|%s_s|) Bool) ; %s\n", | ||||
| 					log_id(module), idcounter, log_id(module), log_signal(bit))); | ||||
| 			register_bool(bit, idcounter++); | ||||
| 		} | ||||
| 
 | ||||
| 		return stringf("(%s %s)", bool_cache.at(bit).c_str(), state_name); | ||||
| 		auto f = fcache.at(bit); | ||||
| 		log_assert(f.second == -1); | ||||
| 		return stringf("(|%s#%d| %s)", log_id(module), f.first, state_name); | ||||
| 	} | ||||
| 
 | ||||
| 	void make_wire(RTLIL::Wire *wire) | ||||
| 	std::string get_bv(RTLIL::SigSpec sig, const char *state_name = "state") | ||||
| 	{ | ||||
| 		for (int i = 0; i < GetSize(wire); i++) | ||||
| 			get_bool(RTLIL::SigBit(wire, i)); | ||||
| 		std::vector<std::string> subexpr; | ||||
| 
 | ||||
| 		for (auto bit : sig) | ||||
| 			subexpr.push_back(stringf("(ite %s #b1 #b0)", get_bool(bit, state_name).c_str())); | ||||
| 
 | ||||
| 		if (GetSize(subexpr) > 1) { | ||||
| 			std::string expr = "(concat"; | ||||
| 			for (int i = GetSize(subexpr)-1; i >= 0; i--) | ||||
| 				expr += " " + subexpr[i]; | ||||
| 			return expr + ")"; | ||||
| 		} else { | ||||
| 			log_assert(GetSize(subexpr) == 1); | ||||
| 			return subexpr[0]; | ||||
| 		} | ||||
| 	} | ||||
| 
 | ||||
| 	void run_gates() | ||||
| 	void export_gate(RTLIL::Cell *cell, std::string expr) | ||||
| 	{ | ||||
| 		// basic gate-level logic cell types
 | ||||
| 		RTLIL::SigBit bit = sigmap(cell->getPort("\\Y")[0]); | ||||
| 		std::string processed_expr; | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_BUF_"]) | ||||
| 			clauses.push_back(stringf("  (= %s %s)\n", | ||||
| 					get_bool(cell->getPort("\\A").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Y").to_single_sigbit()).c_str())); | ||||
| 		cells_by_type.erase("$_BUF_"); | ||||
| 		for (char ch : expr) { | ||||
| 			if (ch == 'A') processed_expr += get_bool(cell->getPort("\\A")[0]); | ||||
| 			else if (ch == 'B') processed_expr += get_bool(cell->getPort("\\B")[0]); | ||||
| 			else if (ch == 'C') processed_expr += get_bool(cell->getPort("\\C")[0]); | ||||
| 			else if (ch == 'D') processed_expr += get_bool(cell->getPort("\\D")[0]); | ||||
| 			else if (ch == 'S') processed_expr += get_bool(cell->getPort("\\S")[0]); | ||||
| 			else processed_expr += ch; | ||||
| 		} | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_NOT_"]) | ||||
| 			clauses.push_back(stringf("  (distinct %s %s)\n", | ||||
| 					get_bool(cell->getPort("\\A").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Y").to_single_sigbit()).c_str())); | ||||
| 		cells_by_type.erase("$_NOT_"); | ||||
| 		decls.push_back(stringf("(define-fun |%s#%d| ((state |%s_s|)) Bool %s) ; %s\n", | ||||
| 				log_id(module), idcounter, log_id(module), processed_expr.c_str(), log_signal(bit))); | ||||
| 		register_bool(bit, idcounter++); | ||||
| 		return; | ||||
| 	} | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_AND_"]) | ||||
| 			clauses.push_back(stringf("  (= (and %s %s) %s)\n", | ||||
| 					get_bool(cell->getPort("\\A").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\B").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Y").to_single_sigbit()).c_str())); | ||||
| 		cells_by_type.erase("$_AND_"); | ||||
| 	void export_cell(RTLIL::Cell *cell) | ||||
| 	{ | ||||
| 		if (exported_cells.count(cell)) | ||||
| 			return; | ||||
| 		exported_cells.insert(cell); | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_OR_"]) | ||||
| 			clauses.push_back(stringf("  (= (or %s %s) %s)\n", | ||||
| 					get_bool(cell->getPort("\\A").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\B").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Y").to_single_sigbit()).c_str())); | ||||
| 		cells_by_type.erase("$_OR_"); | ||||
| 		if (cell->type == "$_DFF_P_" || cell->type == "$_DFF_N_") | ||||
| 		{ | ||||
| 			std::string expr_d = get_bool(cell->getPort("\\D")[0]); | ||||
| 			std::string expr_q = get_bool(cell->getPort("\\Q")[0], "next_state"); | ||||
| 			trans.push_back(stringf("  (= %s %s)\n", expr_d.c_str(), expr_q.c_str())); | ||||
| 			return; | ||||
| 		} | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_XOR_"]) | ||||
| 			clauses.push_back(stringf("  (= (xor %s %s) %s)\n", | ||||
| 					get_bool(cell->getPort("\\A").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\B").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Y").to_single_sigbit()).c_str())); | ||||
| 		cells_by_type.erase("$_XOR_"); | ||||
| 		if (cell->type == "$_BUF_") return export_gate(cell, "A"); | ||||
| 		if (cell->type == "$_NOT_") return export_gate(cell, "(not A)"); | ||||
| 		if (cell->type == "$_AND_") return export_gate(cell, "(and A B)"); | ||||
| 		if (cell->type == "$_NAND_") return export_gate(cell, "(not (and A B))"); | ||||
| 		if (cell->type == "$_OR_") return export_gate(cell, "(or A B)"); | ||||
| 		if (cell->type == "$_NOR_") return export_gate(cell, "(not (or A B))"); | ||||
| 		if (cell->type == "$_XOR_") return export_gate(cell, "(xor A B)"); | ||||
| 		if (cell->type == "$_XNOR_") return export_gate(cell, "(not (xor A B))"); | ||||
| 		if (cell->type == "$_MUX_") return export_gate(cell, "(ite S B A)"); | ||||
| 		if (cell->type == "$_AOI3_") return export_gate(cell, "(not (or (and A B) C))"); | ||||
| 		if (cell->type == "$_OAI3_") return export_gate(cell, "(not (and (or A B) C))"); | ||||
| 		if (cell->type == "$_AOI4_") return export_gate(cell, "(not (or (and A B) (and C D)))"); | ||||
| 		if (cell->type == "$_OAI4_") return export_gate(cell, "(not (and (or A B) (or C D)))"); | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_MUX_"]) | ||||
| 			clauses.push_back(stringf("  (= (ite %s %s %s) %s)\n", | ||||
| 					get_bool(cell->getPort("\\S").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\B").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\A").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Y").to_single_sigbit()).c_str())); | ||||
| 		cells_by_type.erase("$_MUX_"); | ||||
| 
 | ||||
| 
 | ||||
| 		// inverted gate-level logic cell types
 | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_NAND_"]) | ||||
| 			clauses.push_back(stringf("  (distinct (and %s %s) %s)\n", | ||||
| 					get_bool(cell->getPort("\\A").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\B").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Y").to_single_sigbit()).c_str())); | ||||
| 		cells_by_type.erase("$_NAND_"); | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_NOR_"]) | ||||
| 			clauses.push_back(stringf("  (distinct (or %s %s) %s)\n", | ||||
| 					get_bool(cell->getPort("\\A").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\B").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Y").to_single_sigbit()).c_str())); | ||||
| 		cells_by_type.erase("$_NOR_"); | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_XNOR_"]) | ||||
| 			clauses.push_back(stringf("  (distinct (xor %s %s) %s)\n", | ||||
| 					get_bool(cell->getPort("\\A").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\B").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Y").to_single_sigbit()).c_str())); | ||||
| 		cells_by_type.erase("$_XNOR_"); | ||||
| 
 | ||||
| 
 | ||||
| 		// advanced cmos-style logic cell types
 | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_AOI3_"]) | ||||
| 			clauses.push_back(stringf("  (distinct (or (and %s %s) %s) %s)\n", | ||||
| 					get_bool(cell->getPort("\\A").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\B").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\C").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Y").to_single_sigbit()).c_str())); | ||||
| 		cells_by_type.erase("$_AOI3_"); | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_AOI4_"]) | ||||
| 			clauses.push_back(stringf("  (distinct (or (and %s %s) (and %s %s)) %s)\n", | ||||
| 					get_bool(cell->getPort("\\A").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\B").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\C").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\D").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Y").to_single_sigbit()).c_str())); | ||||
| 		cells_by_type.erase("$_AOI4_"); | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_OAI3_"]) | ||||
| 			clauses.push_back(stringf("  (distinct (or (and %s %s) %s) %s)\n", | ||||
| 					get_bool(cell->getPort("\\A").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\B").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\C").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Y").to_single_sigbit()).c_str())); | ||||
| 		cells_by_type.erase("$_OAI3_"); | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_OAI4_"]) | ||||
| 			clauses.push_back(stringf("  (distinct (or (and %s %s) (and %s %s)) %s)\n", | ||||
| 					get_bool(cell->getPort("\\A").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\B").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\C").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\D").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Y").to_single_sigbit()).c_str())); | ||||
| 		cells_by_type.erase("$_OAI4_"); | ||||
| 
 | ||||
| 
 | ||||
| 		// simple DFF cells (ignoring clock domains)
 | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_DFF_P_"]) | ||||
| 			trans.push_back(stringf("  (= %s %s)\n", | ||||
| 					get_bool(cell->getPort("\\D").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Q").to_single_sigbit(), "next_state").c_str())); | ||||
| 		cells_by_type.erase("$_DFF_P_"); | ||||
| 
 | ||||
| 		for (auto cell : cells_by_type["$_DFF_N_"]) | ||||
| 			trans.push_back(stringf("  (= %s %s)\n", | ||||
| 					get_bool(cell->getPort("\\D").to_single_sigbit()).c_str(), | ||||
| 					get_bool(cell->getPort("\\Q").to_single_sigbit(), "next_state").c_str())); | ||||
| 		cells_by_type.erase("$_DFF_N_"); | ||||
| 		log_error("Unsupported cell type %s for cell %s.%s.\n", | ||||
| 				log_id(cell->type), log_id(module), log_id(cell)); | ||||
| 	} | ||||
| 
 | ||||
| 	void run() | ||||
| 	{ | ||||
| 		for (auto port : module->ports) | ||||
| 			make_wire(module->wire(port)); | ||||
| 
 | ||||
| 		for (auto cell : module->cells()) | ||||
| 			cells_by_type[cell->type].push_back(cell); | ||||
| 
 | ||||
| 		run_gates(); | ||||
| 
 | ||||
| 		for (auto &it : cells_by_type) | ||||
| 			log_error("Found %d cells of unsupported type %s in module %s.\n", GetSize(it.second), log_id(it.first), log_id(module)); | ||||
| 		for (auto wire : module->wires()) | ||||
| 			if (wire->port_id || wire->get_bool_attribute("\\keep")) { | ||||
| 				RTLIL::SigSpec sig = sigmap(wire); | ||||
| 				if (bvmode && GetSize(sig) > 1) { | ||||
| 					decls.push_back(stringf("(define-fun |%s_n %s| ((state |%s_s|)) (_ BitVec %d) %s)\n", | ||||
| 							log_id(module), log_id(wire), log_id(module), GetSize(sig), get_bv(sig).c_str())); | ||||
| 				} else { | ||||
| 					for (int i = 0; i < GetSize(sig); i++) | ||||
| 						if (GetSize(sig) > 1) | ||||
| 							decls.push_back(stringf("(define-fun |%s_n %s %d| ((state |%s_s|)) Bool %s)\n", | ||||
| 									log_id(module), log_id(wire), i, log_id(module), get_bool(sig[i]).c_str())); | ||||
| 						else | ||||
| 							decls.push_back(stringf("(define-fun |%s_n %s| ((state |%s_s|)) Bool %s)\n", | ||||
| 									log_id(module), log_id(wire), log_id(module), get_bool(sig[i]).c_str())); | ||||
| 				} | ||||
| 			} | ||||
| 	} | ||||
| 
 | ||||
| 	void write(std::ostream &f) | ||||
| 	{ | ||||
| 		for (auto it : decls) | ||||
| 			f << it; | ||||
| 		f << stringf("(define-fun |%s_c| ((state |%s_s|)) Bool (and\n", log_id(module), log_id(module)); | ||||
| 		for (auto it : clauses) | ||||
| 			f << it; | ||||
| 		f << "true true))\n"; | ||||
| 		f << stringf("(define-fun |%s_t| ((state |%s_s|)(next_state |%s_s|)) Bool (and\n", log_id(module), log_id(module), log_id(module)); | ||||
| 		for (auto it : trans) | ||||
| 			f << it; | ||||
|  | @ -225,24 +196,32 @@ struct Smt2Backend : public Backend { | |||
| 		log("\n"); | ||||
| 		log("    write_smt2 [options] [filename]\n"); | ||||
| 		log("\n"); | ||||
| 		log("Write a SMT-LIBv2 description of the current design. For a module with name\n"); | ||||
| 		log("'<mod>' this will declare the sort '<mod>_s' and the two functions '<mod>_c'\n"); | ||||
| 		log("(of arity 1) and '<mod>_t' (of arity 2).\n"); | ||||
| 		log("Write a SMT-LIBv2 [1] description of the current design. For a module with name\n"); | ||||
| 		log("'<mod>' this will declare the sort '<mod>_s' (state of the module) and the the\n"); | ||||
| 		log("function '<mod>_t' (state transition function).\n"); | ||||
| 		log("\n"); | ||||
| 		log("The sort represents the state of the module. Additional '<mod>_n' functions are\n"); | ||||
| 		log("declared that can be used to access the values of all signals in the module.\n"); | ||||
| 		log("The '<mod>_s' sort represents the a module state. Additional '<mod>_n' functions\n"); | ||||
| 		log("are provided that can be used to access the values of all signals in the module.\n"); | ||||
| 		log("Only ports, and signals with the 'keep' attribute set are made available via\n"); | ||||
| 		log("such functions. Without the -bv option, multi-bit wires are exported as\n"); | ||||
| 		log("separate functions of type Bool for the individual bits. With the -bv option\n"); | ||||
| 		log("multi-bit wires are exported as single functions of type BitVec.\n"); | ||||
| 		log("\n"); | ||||
| 		log("The '<mod>_c' function evaluates to 'true' when the given state is consistent\n"); | ||||
| 		log("with the description of the models.\n"); | ||||
| 		log("The '<mod>_t' function evaluates to 'true' when the given pair of states\n"); | ||||
| 		log("describes a valid state transition.\n"); | ||||
| 		log("\n"); | ||||
| 		log("The '<mod>_t' function evaluates to 'true' when the given pair of states is\n"); | ||||
| 		log("describes a valid state transition, provided that '<mod>_c' is true for both\n"); | ||||
| 		log("states.\n"); | ||||
| 		log("    -bv\n"); | ||||
| 		log("        enable support for BitVec (FixedSizeBitVectors theory). with this\n"); | ||||
| 		log("        option set multi-bit wires are represented using the BitVec sort and\n"); | ||||
| 		log("        support for coarse grain cells (incl. arithmetic) is enabled.\n"); | ||||
| 		log("\n"); | ||||
| 		log("    -tpl <template_file>\n"); | ||||
| 		log("        use the given template file. the line containing only the token '%%%%'\n"); | ||||
| 		log("        is replaced with the regular output of this command.\n"); | ||||
| 		log("\n"); | ||||
| 		log("[1] For more information on SMT-LIBv2 visit http://smt-lib.org/ or read David\n"); | ||||
| 		log("R. Cok's tutorial: http://www.grammatech.com/resources/smt/SMTLIBTutorial.pdf\n"); | ||||
| 		log("\n"); | ||||
| 		log("---------------------------------------------------------------------------\n"); | ||||
| 		log("\n"); | ||||
| 		log("Example:\n"); | ||||
|  | @ -257,8 +236,8 @@ struct Smt2Backend : public Backend { | |||
| 		log("\n"); | ||||
| 		log("For this proof we create the following template (test.tpl).\n"); | ||||
| 		log("\n"); | ||||
| 		log("        ; we only need QF_UF for this poof\n"); | ||||
| 		log("        (set-logic QF_UF)\n"); | ||||
| 		log("        ; we need QF_UFBV for this poof\n"); | ||||
| 		log("        (set-logic QF_UFBV)\n"); | ||||
| 		log("\n"); | ||||
| 		log("        ; insert the auto-generated code here\n"); | ||||
| 		log("        %%%%\n"); | ||||
|  | @ -267,27 +246,23 @@ struct Smt2Backend : public Backend { | |||
| 		log("        (declare-fun s1 () test_s)\n"); | ||||
| 		log("        (declare-fun s2 () test_s)\n"); | ||||
| 		log("\n"); | ||||
| 		log("        ; both states are valid and s2 follows s1\n"); | ||||
| 		log("        (assert (test_c s1))\n"); | ||||
| 		log("        (assert (test_c s2))\n"); | ||||
| 		log("        ; state s2 is the successor of state s1\n"); | ||||
| 		log("        (assert (test_t s1 s2))\n"); | ||||
| 		log("\n"); | ||||
| 		log("        ; we are looking for a solution with y non-zero in s1\n"); | ||||
| 		log("        (assert (or (|test_n y 0| s1) (|test_n y 1| s1)\n"); | ||||
| 		log("                    (|test_n y 2| s1) (|test_n y 3| s1)))\n"); | ||||
| 		log("        ; we are looking for a model with y non-zero in s1\n"); | ||||
| 		log("        (assert (distinct (|test_n y| s1) #b0000))\n"); | ||||
| 		log("\n"); | ||||
| 		log("        ; we are looking for a solution with y zero in s2\n"); | ||||
| 		log("        (assert (not (or (|test_n y 0| s2) (|test_n y 1| s2)\n"); | ||||
| 		log("                         (|test_n y 2| s2) (|test_n y 3| s2))))\n"); | ||||
| 		log("        ; we are looking for a model with y zero in s2\n"); | ||||
| 		log("        (assert (= (|test_n y| s2) #b0000))\n"); | ||||
| 		log("\n"); | ||||
| 		log("        ; is there such a solution?\n"); | ||||
| 		log("        ; is there such a model?\n"); | ||||
| 		log("        (check-sat)\n"); | ||||
| 		log("\n"); | ||||
| 		log("The following yosys script will create a 'test.smt2' file for our proof:\n"); | ||||
| 		log("\n"); | ||||
| 		log("        read_verilog test.v\n"); | ||||
| 		log("        hierarchy; proc; techmap; opt -fast\n"); | ||||
| 		log("        write_smt2 -template test.tpl test.smt2\n"); | ||||
| 		log("        write_smt2 -bv -tpl test.tpl test.smt2\n"); | ||||
| 		log("\n"); | ||||
| 		log("Running 'cvc4 test.smt2' will print 'unsat' because y can never transition\n"); | ||||
| 		log("from non-zero to zero in the test design.\n"); | ||||
|  | @ -296,17 +271,23 @@ struct Smt2Backend : public Backend { | |||
| 	virtual void execute(std::ostream *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design) | ||||
| 	{ | ||||
| 		std::ifstream template_f; | ||||
| 		bool bvmode = false; | ||||
| 
 | ||||
| 		log_header("Executing SMT2 backend.\n"); | ||||
| 
 | ||||
| 		size_t argidx; | ||||
| 		for (argidx = 1; argidx < args.size(); argidx++) | ||||
| 		{ | ||||
| 			if (args[argidx] == "-template" && argidx+1 < args.size()) { | ||||
| 			if (args[argidx] == "-tpl" && argidx+1 < args.size()) { | ||||
| 				template_f.open(args[++argidx]); | ||||
| 				if (template_f.fail()) | ||||
| 					log_error("Can't open template file `%s'.\n", args[argidx].c_str()); | ||||
| 				continue; | ||||
| 			} | ||||
| 			if (args[argidx] == "-bv") { | ||||
| 				bvmode = true; | ||||
| 				continue; | ||||
| 			} | ||||
| 			break; | ||||
| 		} | ||||
| 		extra_args(f, filename, args, argidx); | ||||
|  | @ -332,7 +313,7 @@ struct Smt2Backend : public Backend { | |||
| 
 | ||||
| 			log("Creating SMT-LIBv2 representation of module %s.\n", log_id(module)); | ||||
| 
 | ||||
| 			Smt2Worker worker(module); | ||||
| 			Smt2Worker worker(module, bvmode); | ||||
| 			worker.run(); | ||||
| 			worker.write(*f); | ||||
| 		} | ||||
|  |  | |||
		Loading…
	
	Add table
		Add a link
		
	
		Reference in a new issue