Moved cmds from kernel/ to passes/cmds/

2 files changed, 0 insertions, 1736 deletions

diff --git a/kernel/select.cc b/kernel/select.cc
deleted file mode 100644
index 1ab15c9a9..000000000
--- a/kernel/select.cc
+++ /dev/null
@@ -1,1052 +0,0 @@
-/*
- *  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.
- *
- */
-
-#include "kernel/register.h"
-#include "kernel/celltypes.h"
-#include "kernel/log.h"
-#include <string.h>
-#include <fnmatch.h>
-
-using RTLIL::id2cstr;
-
-static std::vector<RTLIL::Selection> work_stack;
-
-static bool match_ids(RTLIL::IdString id, std::string pattern)
-{
-	if (!fnmatch(pattern.c_str(), id.c_str(), FNM_NOESCAPE))
-		return true;
-	if (id.size() > 0 && id[0] == '\\' && !fnmatch(pattern.c_str(), id.substr(1).c_str(), FNM_NOESCAPE))
-		return true;
-	return false;
-}
-
-static bool match_attr_val(const RTLIL::Const &value, std::string pattern)
-{
-	if (!fnmatch(pattern.c_str(), value.str.c_str(), FNM_NOESCAPE))
-		return true;
-	return false;
-}
-
-static bool match_attr(const std::map<RTLIL::IdString, RTLIL::Const> &attributes, std::string name_pat, std::string value_pat, bool use_value_pat)
-{
-	if (name_pat.find('*') != std::string::npos || name_pat.find('?') != std::string::npos || name_pat.find('[') != std::string::npos) {
-		for (auto &it : attributes) {
-			if (!fnmatch(name_pat.c_str(), it.first.c_str(), FNM_NOESCAPE) && (!use_value_pat || match_attr_val(it.second, value_pat)))
-				return true;
-			if (it.first.size() > 0 && it.first[0] == '\\' && !fnmatch(name_pat.c_str(), it.first.substr(1).c_str(), FNM_NOESCAPE) && (!use_value_pat || match_attr_val(it.second, value_pat)))
-				return true;
-		}
-	} else {
-		if (name_pat.size() > 0 && (name_pat[0] == '\\' || name_pat[0] == '$') && attributes.count(name_pat) && (!use_value_pat || match_attr_val(attributes.at(name_pat), value_pat)))
-			return true;
-		if (attributes.count("\\" + name_pat) && (!use_value_pat || match_attr_val(attributes.at("\\" + name_pat), value_pat)))
-			return true;
-	}
-	return false;
-}
-
-static void select_op_neg(RTLIL::Design *design, RTLIL::Selection &lhs)
-{
-	if (lhs.full_selection) {
-		lhs.full_selection = false;
-		lhs.selected_modules.clear();
-		lhs.selected_members.clear();
-		return;
-	}
-
-	if (lhs.selected_modules.size() == 0 && lhs.selected_members.size() == 0) {
-		lhs.full_selection = true;
-		return;
-	}
-
-	RTLIL::Selection new_sel(false);
-
-	for (auto &mod_it : design->modules)
-	{
-		if (lhs.selected_whole_module(mod_it.first))
-			continue;
-		if (!lhs.selected_module(mod_it.first)) {
-			new_sel.selected_modules.insert(mod_it.first);
-			continue;
-		}
-
-		RTLIL::Module *mod = mod_it.second;
-		for (auto &it : mod->wires)
-			if (!lhs.selected_member(mod_it.first, it.first))
-				new_sel.selected_members[mod->name].insert(it.first);
-		for (auto &it : mod->memories)
-			if (!lhs.selected_member(mod_it.first, it.first))
-				new_sel.selected_members[mod->name].insert(it.first);
-		for (auto &it : mod->cells)
-			if (!lhs.selected_member(mod_it.first, it.first))
-				new_sel.selected_members[mod->name].insert(it.first);
-		for (auto &it : mod->processes)
-			if (!lhs.selected_member(mod_it.first, it.first))
-				new_sel.selected_members[mod->name].insert(it.first);
-	}
-
-	lhs.selected_modules.swap(new_sel.selected_modules);
-	lhs.selected_members.swap(new_sel.selected_members);
-}
-
-static void select_op_union(RTLIL::Design*, RTLIL::Selection &lhs, const RTLIL::Selection &rhs)
-{
-	if (rhs.full_selection) {
-		lhs.full_selection = true;
-		lhs.selected_modules.clear();
-		lhs.selected_members.clear();
-		return;
-	}
-
-	if (lhs.full_selection)
-		return;
-
-	for (auto &it : rhs.selected_members)
-		for (auto &it2 : it.second)
-			lhs.selected_members[it.first].insert(it2);
-
-	for (auto &it : rhs.selected_modules) {
-		lhs.selected_modules.insert(it);
-		lhs.selected_members.erase(it);
-	}
-}
-
-static void select_op_diff(RTLIL::Design *design, RTLIL::Selection &lhs, const RTLIL::Selection &rhs)
-{
-	if (rhs.full_selection) {
-		lhs.full_selection = false;
-		lhs.selected_modules.clear();
-		lhs.selected_members.clear();
-		return;
-	}
-
-	if (lhs.full_selection) {
-		if (!rhs.full_selection && rhs.selected_modules.size() == 0 && rhs.selected_members.size() == 0)
-			return;
-		lhs.full_selection = false;
-		for (auto &it : design->modules)
-			lhs.selected_modules.insert(it.first);
-	}
-
-	for (auto &it : rhs.selected_modules) {
-		lhs.selected_modules.erase(it);
-		lhs.selected_members.erase(it);
-	}
-
-	for (auto &it : rhs.selected_members)
-	{
-		if (design->modules.count(it.first) == 0)
-			continue;
-
-		RTLIL::Module *mod = design->modules[it.first];
-
-		if (lhs.selected_modules.count(mod->name) > 0)
-		{
-			for (auto &it : mod->wires)
-				lhs.selected_members[mod->name].insert(it.first);
-			for (auto &it : mod->memories)
-				lhs.selected_members[mod->name].insert(it.first);
-			for (auto &it : mod->cells)
-				lhs.selected_members[mod->name].insert(it.first);
-			for (auto &it : mod->processes)
-				lhs.selected_members[mod->name].insert(it.first);
-			lhs.selected_modules.erase(mod->name);
-		}
-
-		if (lhs.selected_members.count(mod->name) == 0)
-			continue;
-
-		for (auto &it2 : it.second)
-			lhs.selected_members[mod->name].erase(it2);
-	}
-}
-
-static void select_op_intersect(RTLIL::Design *design, RTLIL::Selection &lhs, const RTLIL::Selection &rhs)
-{
-	if (rhs.full_selection)
-		return;
-
-	if (lhs.full_selection) {
-		lhs.full_selection = false;
-		for (auto &it : design->modules)
-			lhs.selected_modules.insert(it.first);
-	}
-
-	std::vector<RTLIL::IdString> del_list;
-
-	for (auto &it : lhs.selected_modules)
-		if (rhs.selected_modules.count(it) == 0) {
-			if (rhs.selected_members.count(it) > 0)
-				for (auto &it2 : rhs.selected_members.at(it))
-					lhs.selected_members[it].insert(it2);
-			del_list.push_back(it);
-		}
-	for (auto &it : del_list)
-		lhs.selected_modules.erase(it);
-
-	del_list.clear();
-	for (auto &it : lhs.selected_members) {
-		if (rhs.selected_modules.count(it.first) > 0)
-			continue;
-		if (rhs.selected_members.count(it.first) == 0) {
-			del_list.push_back(it.first);
-			continue;
-		}
-		std::vector<RTLIL::IdString> del_list2;
-		for (auto &it2 : it.second)
-			if (rhs.selected_members.at(it.first).count(it2) == 0)
-				del_list2.push_back(it2);
-		for (auto &it2 : del_list2)
-			it.second.erase(it2);
-		if (it.second.size() == 0)
-			del_list.push_back(it.first);
-	}
-	for (auto &it : del_list)
-		lhs.selected_members.erase(it);
-}
-
-namespace {
-	struct expand_rule_t {
-		char mode;
-		std::set<RTLIL::IdString> cell_types, port_names;
-	};
-}
-
-static int parse_comma_list(std::set<RTLIL::IdString> &tokens, std::string str, size_t pos, std::string stopchar)
-{
-	stopchar += ',';
-	while (1) {
-		size_t endpos = str.find_first_of(stopchar, pos);
-		if (endpos == std::string::npos)
-			endpos = str.size();
-		if (endpos != pos)
-			tokens.insert(RTLIL::escape_id(str.substr(pos, endpos-pos)));
-		pos = endpos;
-		if (pos == str.size() || str[pos] != ',')
-			return pos;
-		pos++;
-	}
-}
-
-static int select_op_expand(RTLIL::Design *design, RTLIL::Selection &lhs, std::vector<expand_rule_t> &rules, std::set<RTLIL::IdString> &limits, int max_objects, char mode, CellTypes &ct)
-{
-	int sel_objects = 0;
-	bool is_input, is_output;
-	for (auto &mod_it : design->modules)
-	{
-		if (lhs.selected_whole_module(mod_it.first) || !lhs.selected_module(mod_it.first))
-			continue;
-
-		RTLIL::Module *mod = mod_it.second;
-		std::set<RTLIL::Wire*> selected_wires;
-
-		for (auto &it : mod->wires)
-			if (lhs.selected_member(mod_it.first, it.first) && limits.count(it.first) == 0)
-				selected_wires.insert(it.second);
-
-		for (auto &cell : mod->cells)
-		for (auto &conn : cell.second->connections)
-		{
-			char last_mode = '-';
-			for (auto &rule : rules) {
-				last_mode = rule.mode;
-				if (rule.cell_types.size() > 0 && rule.cell_types.count(cell.second->type) == 0)
-					continue;
-				if (rule.port_names.size() > 0 && rule.port_names.count(conn.first) == 0)
-					continue;
-				if (rule.mode == '+')
-					goto include_match;
-				else
-					goto exclude_match;
-			}
-			if (last_mode == '+')
-				goto exclude_match;
-		include_match:
-			is_input = mode == 'x' || ct.cell_input(cell.second->type, conn.first);
-			is_output = mode == 'x' || ct.cell_output(cell.second->type, conn.first);
-			for (auto &chunk : conn.second.chunks)
-				if (chunk.wire != NULL) {
-					if (max_objects != 0 && selected_wires.count(chunk.wire) > 0 && lhs.selected_members[mod->name].count(cell.first) == 0)
-						if (mode == 'x' || (mode == 'i' && is_output) || (mode == 'o' && is_input))
-							lhs.selected_members[mod->name].insert(cell.first), sel_objects++, max_objects--;
-					if (max_objects != 0 && lhs.selected_members[mod->name].count(cell.first) > 0 && limits.count(cell.first) == 0 && lhs.selected_members[mod->name].count(chunk.wire->name) == 0)
-						if (mode == 'x' || (mode == 'i' && is_input) || (mode == 'o' && is_output))
-							lhs.selected_members[mod->name].insert(chunk.wire->name), sel_objects++, max_objects--;
-				}
-		exclude_match:;
-		}
-	}
-
-	return sel_objects;
-}
-
-static void select_op_expand(RTLIL::Design *design, std::string arg, char mode)
-{
-	int pos = mode == 'x' ? 2 : 3, levels = 1, rem_objects = -1;
-	std::vector<expand_rule_t> rules;
-	std::set<RTLIL::IdString> limits;
-
-	CellTypes ct;
-
-	if (mode != 'x')
-		ct.setup(design);
-
-	if (pos < int(arg.size()) && arg[pos] == '*') {
-		levels = 1000000;
-		pos++;
-	} else
-	if (pos < int(arg.size()) && '0' <= arg[pos] && arg[pos] <= '9') {
-		size_t endpos = arg.find_first_not_of("0123456789", pos);
-		if (endpos == std::string::npos)
-			endpos = arg.size();
-		levels = atoi(arg.substr(pos, endpos-pos).c_str());
-		pos = endpos;
-	}
-
-	if (pos < int(arg.size()) && arg[pos] == '.') {
-		size_t endpos = arg.find_first_not_of("0123456789", ++pos);
-		if (endpos == std::string::npos)
-			endpos = arg.size();
-		if (int(endpos) > pos)
-			rem_objects = atoi(arg.substr(pos, endpos-pos).c_str());
-		pos = endpos;
-	}
-
-	while (pos < int(arg.size())) {
-		if (arg[pos] != ':' || pos+1 == int(arg.size()))
-			log_cmd_error("Syntax error in expand operator '%s'.\n", arg.c_str());
-		pos++;
-		if (arg[pos] == '+' || arg[pos] == '-') {
-			expand_rule_t rule;
-			rule.mode = arg[pos++];
-			pos = parse_comma_list(rule.cell_types, arg, pos, "[:");
-			if (pos < int(arg.size()) && arg[pos] == '[') {
-				pos = parse_comma_list(rule.port_names, arg, pos+1, "]:");
-				if (pos < int(arg.size()) && arg[pos] == ']')
-					pos++;
-			}
-			rules.push_back(rule);
-		} else {
-			size_t endpos = arg.find(':', pos);
-			if (endpos == std::string::npos)
-				endpos = arg.size();
-			if (int(endpos) > pos) {
-				std::string str = arg.substr(pos, endpos-pos);
-				if (str[0] == '@') {
-					str = RTLIL::escape_id(str.substr(1));
-					if (design->selection_vars.count(str) > 0) {
-						for (auto i1 : design->selection_vars.at(str).selected_members)
-						for (auto i2 : i1.second)
-							limits.insert(i2);
-					}
-				} else
-					limits.insert(RTLIL::escape_id(str));
-			}
-			pos = endpos;
-		}
-	}
-
-#if 0
-	log("expand by %d levels (max. %d objects):\n", levels, rem_objects);
-	for (auto &rule : rules) {
-		log("  rule (%c):\n", rule.mode);
-		if (rule.cell_types.size() > 0) {
-			log("    cell types:");
-			for (auto &it : rule.cell_types)
-				log(" %s", it.c_str());
-			log("\n");
-		}
-		if (rule.port_names.size() > 0) {
-			log("    port names:");
-			for (auto &it : rule.port_names)
-				log(" %s", it.c_str());
-			log("\n");
-		}
-	}
-	if (limits.size() > 0) {
-		log("  limits:");
-		for (auto &it : limits)
-			log(" %s", it.c_str());
-		log("\n");
-	}
-#endif
-
-	while (levels-- > 0 && rem_objects != 0) {
-		int num_objects = select_op_expand(design, work_stack.back(), rules, limits, rem_objects, mode, ct);
-		if (num_objects == 0)
-			break;
-		rem_objects -= num_objects;
-	}
-
-	if (rem_objects == 0)
-		log("Warning: reached configured limit at `%s'.\n", arg.c_str());
-}
-
-static void select_filter_active_mod(RTLIL::Design *design, RTLIL::Selection &sel)
-{
-	if (design->selected_active_module.empty())
-		return;
-	
-	if (sel.full_selection) {
-		sel.full_selection = false;
-		sel.selected_modules.clear();
-		sel.selected_members.clear();
-		sel.selected_modules.insert(design->selected_active_module);
-		return;
-	}
-
-	std::vector<std::string> del_list;
-	for (auto mod_name : sel.selected_modules)
-		if (mod_name != design->selected_active_module)
-			del_list.push_back(mod_name);
-	for (auto &it : sel.selected_members)
-		if (it.first != design->selected_active_module)
-			del_list.push_back(it.first);
-	for (auto mod_name : del_list) {
-		sel.selected_modules.erase(mod_name);
-		sel.selected_members.erase(mod_name);
-	}
-}
-
-static void select_stmt(RTLIL::Design *design, std::string arg)
-{
-	std::string arg_mod, arg_memb;
-
-	if (arg.size() == 0)
-		return;
-
-	if (arg[0] == '%') {
-		if (arg == "%") {
-			if (design->selection_stack.size() > 0)
-				work_stack.push_back(design->selection_stack.back());
-		} else
-		if (arg == "%%") {
-			while (work_stack.size() > 1) {
-				select_op_union(design, work_stack.front(), work_stack.back());
-				work_stack.pop_back();
-			}
-		} else
-		if (arg == "%n") {
-			if (work_stack.size() < 1)
-				log_cmd_error("Must have at least one element on the stack for operator %%n.\n");
-			select_op_neg(design, work_stack[work_stack.size()-1]);
-		} else
-		if (arg == "%u") {
-			if (work_stack.size() < 2)
-				log_cmd_error("Must have at least two elements on the stack for operator %%u.\n");
-			select_op_union(design, work_stack[work_stack.size()-2], work_stack[work_stack.size()-1]);
-			work_stack.pop_back();
-		} else
-		if (arg == "%d") {
-			if (work_stack.size() < 2)
-				log_cmd_error("Must have at least two elements on the stack for operator %%d.\n");
-			select_op_diff(design, work_stack[work_stack.size()-2], work_stack[work_stack.size()-1]);
-			work_stack.pop_back();
-		} else
-		if (arg == "%i") {
-			if (work_stack.size() < 2)
-				log_cmd_error("Must have at least two elements on the stack for operator %%i.\n");
-			select_op_intersect(design, work_stack[work_stack.size()-2], work_stack[work_stack.size()-1]);
-			work_stack.pop_back();
-		} else
-		if (arg == "%x" || (arg.size() > 2 && arg.substr(0, 2) == "%x" && (arg[2] == ':' || arg[2] == '*' || arg[2] == '.' || ('0' <= arg[2] && arg[2] <= '9')))) {
-			if (work_stack.size() < 1)
-				log_cmd_error("Must have at least one element on the stack for operator %%x.\n");
-			select_op_expand(design, arg, 'x');
-		} else
-		if (arg == "%ci" || (arg.size() > 3 && arg.substr(0, 3) == "%ci" && (arg[3] == ':' || arg[3] == '*' || arg[3] == '.' || ('0' <= arg[3] && arg[3] <= '9')))) {
-			if (work_stack.size() < 1)
-				log_cmd_error("Must have at least one element on the stack for operator %%ci.\n");
-			select_op_expand(design, arg, 'i');
-		} else
-		if (arg == "%co" || (arg.size() > 3 && arg.substr(0, 3) == "%co" && (arg[3] == ':' || arg[3] == '*' || arg[3] == '.' || ('0' <= arg[3] && arg[3] <= '9')))) {
-			if (work_stack.size() < 1)
-				log_cmd_error("Must have at least one element on the stack for operator %%co.\n");
-			select_op_expand(design, arg, 'o');
-		} else
-			log_cmd_error("Unknown selection operator '%s'.\n", arg.c_str());
-		if (work_stack.size() >= 1)
-			select_filter_active_mod(design, work_stack.back());
-		return;
-	}
-
-	if (arg[0] == '@') {
-		std::string set_name = RTLIL::escape_id(arg.substr(1));
-		if (design->selection_vars.count(set_name) > 0)
-			work_stack.push_back(design->selection_vars[set_name]);
-		else
-			work_stack.push_back(RTLIL::Selection(false));
-		select_filter_active_mod(design, work_stack.back());
-		return;
-	}
-
-	if (!design->selected_active_module.empty()) {
-		arg_mod = design->selected_active_module;
-		arg_memb = arg;
-	} else {
-		size_t pos = arg.find('/');
-		if (pos == std::string::npos) {
-			arg_mod = arg;
-		} else {
-			arg_mod = arg.substr(0, pos);
-			arg_memb = arg.substr(pos+1);
-		}
-	}
-
-	work_stack.push_back(RTLIL::Selection());
-	RTLIL::Selection &sel = work_stack.back();
-
-	if (arg == "*" && arg_mod == "*") {
-		select_filter_active_mod(design, work_stack.back());
-		return;
-	}
-	
-	sel.full_selection = false;
-	for (auto &mod_it : design->modules)
-	{
-		if (!match_ids(mod_it.first, arg_mod))
-			continue;
-
-		if (arg_memb == "") {
-			sel.selected_modules.insert(mod_it.first);
-			continue;
-		}
-
-		RTLIL::Module *mod = mod_it.second;
-		if (arg_memb.substr(0, 2) == "w:") {
-			for (auto &it : mod->wires)
-				if (match_ids(it.first, arg_memb.substr(2)))
-					sel.selected_members[mod->name].insert(it.first);
-		} else
-		if (arg_memb.substr(0, 2) == "m:") {
-			for (auto &it : mod->memories)
-				if (match_ids(it.first, arg_memb.substr(2)))
-					sel.selected_members[mod->name].insert(it.first);
-		} else
-		if (arg_memb.substr(0, 2) == "c:") {
-			for (auto &it : mod->cells)
-				if (match_ids(it.first, arg_memb.substr(2)))
-					sel.selected_members[mod->name].insert(it.first);
-		} else
-		if (arg_memb.substr(0, 2) == "t:") {
-			for (auto &it : mod->cells)
-				if (match_ids(it.second->type, arg_memb.substr(2)))
-					sel.selected_members[mod->name].insert(it.first);
-		} else
-		if (arg_memb.substr(0, 2) == "p:") {
-			for (auto &it : mod->processes)
-				if (match_ids(it.first, arg_memb.substr(2)))
-					sel.selected_members[mod->name].insert(it.first);
-		} else
-		if (arg_memb.substr(0, 2) == "a:") {
-			bool use_value_pat = false;
-			std::string name_pat = arg_memb.substr(2);
-			std::string value_pat;
-			if (name_pat.find('=') != std::string::npos) {
-				value_pat = name_pat.substr(name_pat.find('=')+1);
-				name_pat = name_pat.substr(0, name_pat.find('='));
-				use_value_pat = true;
-			}
-			for (auto &it : mod->wires)
-				if (match_attr(it.second->attributes, name_pat, value_pat, use_value_pat))
-					sel.selected_members[mod->name].insert(it.first);
-			for (auto &it : mod->memories)
-				if (match_attr(it.second->attributes, name_pat, value_pat, use_value_pat))
-					sel.selected_members[mod->name].insert(it.first);
-			for (auto &it : mod->cells)
-				if (match_attr(it.second->attributes, name_pat, value_pat, use_value_pat))
-					sel.selected_members[mod->name].insert(it.first);
-			for (auto &it : mod->processes)
-				if (match_attr(it.second->attributes, name_pat, value_pat, use_value_pat))
-					sel.selected_members[mod->name].insert(it.first);
-		} else {
-			if (arg_memb.substr(0, 2) == "n:")
-				arg_memb = arg_memb.substr(2);
-			for (auto &it : mod->wires)
-				if (match_ids(it.first, arg_memb))
-					sel.selected_members[mod->name].insert(it.first);
-			for (auto &it : mod->memories)
-				if (match_ids(it.first, arg_memb))
-					sel.selected_members[mod->name].insert(it.first);
-			for (auto &it : mod->cells)
-				if (match_ids(it.first, arg_memb))
-					sel.selected_members[mod->name].insert(it.first);
-			for (auto &it : mod->processes)
-				if (match_ids(it.first, arg_memb))
-					sel.selected_members[mod->name].insert(it.first);
-		}
-	}
-
-	select_filter_active_mod(design, work_stack.back());
-}
-
-// used in kernel/register.cc and maybe other locations, extern decl. in register.h
-void handle_extra_select_args(Pass *pass, std::vector<std::string> args, size_t argidx, size_t args_size, RTLIL::Design *design)
-{
-	work_stack.clear();
-	for (; argidx < args_size; argidx++) {
-		if (args[argidx].substr(0, 1) == "-") {
-			if (pass != NULL)
-				pass->cmd_error(args, argidx, "Unexpected option in selection arguments.");
-			else
-				log_cmd_error("Unexpected option in selection arguments.");
-		}
-		select_stmt(design, args[argidx]);
-	}
-	while (work_stack.size() > 1) {
-		select_op_union(design, work_stack.front(), work_stack.back());
-		work_stack.pop_back();
-	}
-	if (work_stack.size() > 0)
-		design->selection_stack.push_back(work_stack.back());
-	else
-		design->selection_stack.push_back(RTLIL::Selection(false));
-}
-
-struct SelectPass : public Pass {
-	SelectPass() : Pass("select", "modify and view the list of selected objects") { }
-	virtual void help()
-	{
-		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
-		log("\n");
-		log("    select [ -add | -del | -set <name> ] <selection>\n");
-		log("    select [ -list | -write <filename> | -count | -clear ]\n");
-		log("    select -module <modname>\n");
-		log("\n");
-		log("Most commands use the list of currently selected objects to determine which part\n");
-		log("of the design to operate on. This command can be used to modify and view this\n");
-		log("list of selected objects.\n");
-		log("\n");
-		log("Note that many commands support an optional [selection] argument that can be\n");
-		log("used to override the global selection for the command. The syntax of this\n");
-		log("optional argument is identical to the syntax of the <selection> argument\n");
-		log("described here.\n");
-		log("\n");
-		log("    -add, -del\n");
-		log("        add or remove the given objects to the current selection.\n");
-		log("        without this options the current selection is replaced.\n");
-		log("\n");
-		log("    -set <name>\n");
-		log("        do not modify the current selection. instead save the new selection\n");
-		log("        under the given name (see @<name> below).\n");
-		log("\n");
-		log("    -list\n");
-		log("        list all objects in the current selection\n");
-		log("\n");
-		log("    -write <filename>\n");
-		log("        like -list but write the output to the specified file\n");
-		log("\n");
-		log("    -count\n");
-		log("        count all objects in the current selection\n");
-		log("\n");
-		log("    -clear\n");
-		log("        clear the current selection. this effectively selects the\n");
-		log("        whole design.\n");
-		log("\n");
-		log("    -module <modname>\n");
-		log("        limit the current scope to the specified module.\n");
-		log("        the difference between this and simply selecting the module\n");
-		log("        is that all object names are interpreted relative to this\n");
-		log("        module after this command until the selection is cleared again.\n");
-		log("\n");
-		log("When this command is called without an argument, the current selection\n");
-		log("is displayed in a compact form (i.e. only the module name when a whole module\n");
-		log("is selected).\n");
-		log("\n");
-		log("The <selection> argument itself is a series of commands for a simple stack\n");
-		log("machine. Each element on the stack represents a set of selected objects.\n");
-		log("After this commands have been executed, the union of all remaining sets\n");
-		log("on the stack is computed and used as selection for the command.\n");
-		log("\n");
-		log("Pushing (selecting) object when not in -module mode:\n");
-		log("\n");
-		log("    <mod_pattern>\n");
-		log("        select the specified module(s)\n");
-		log("\n");
-		log("    <mod_pattern>/<obj_pattern>\n");
-		log("        select the specified object(s) from the module(s)\n");
-		log("\n");
-		log("Pushing (selecting) object when in -module mode:\n");
-		log("\n");
-		log("    <obj_pattern>\n");
-		log("        select the specified object(s) from the current module\n");
-		log("\n");
-		log("A <mod_pattern> can be a module name or wildcard expression (*, ?, [..])\n");
-		log("matching module names.\n");
-		log("\n");
-		log("An <obj_pattern> can be an object name, wildcard expression, or one of\n");
-		log("the following:\n");
-		log("\n");
-		log("    w:<pattern>\n");
-		log("        all wires with a name matching the given wildcard pattern\n");
-		log("\n");
-		log("    m:<pattern>\n");
-		log("        all memories with a name matching the given pattern\n");
-		log("\n");
-		log("    c:<pattern>\n");
-		log("        all cells with a name matching the given pattern\n");
-		log("\n");
-		log("    t:<pattern>\n");
-		log("        all cells with a type matching the given pattern\n");
-		log("\n");
-		log("    p:<pattern>\n");
-		log("        all processes with a name matching the given pattern\n");
-		log("\n");
-		log("    a:<pattern>\n");
-		log("        all objects with an attribute name matching the given pattern\n");
-		log("\n");
-		log("    a:<pattern>=<pattern>\n");
-		log("        all objects with a matching attribute name-value-pair\n");
-		log("\n");
-		log("    n:<pattern>\n");
-		log("        all objects with a name matching the given pattern\n");
-		log("        (i.e. 'n:' is optional as it is the default matching rule)\n");
-		log("\n");
-		log("    @<name>\n");
-		log("        push the selection saved prior with 'select -set <name> ...'\n");
-		log("\n");
-		log("The following actions can be performed on the top sets on the stack:\n");
-		log("\n");
-		log("    %%\n");
-		log("        push a copy of the current selection to the stack\n");
-		log("\n");
-		log("    %%%%\n");
-		log("        replace the stack with a union of all elements on it\n");
-		log("\n");
-		log("    %%n\n");
-		log("        replace top set with its invert\n");
-		log("\n");
-		log("    %%u\n");
-		log("        replace the two top sets on the stack with their union\n");
-		log("\n");
-		log("    %%i\n");
-		log("        replace the two top sets on the stack with their intersection\n");
-		log("\n");
-		log("    %%d\n");
-		log("        pop the top set from the stack and subtract it from the new top\n");
-		log("\n");
-		log("    %%x[<num1>|*][.<num2>][:<rule>[:<rule>..]]\n");
-		log("        expand top set <num1> num times according to the specified rules.\n");
-		log("        (i.e. select all cells connected to selected wires and select all\n");
-		log("        wires connected to selected cells) The rules specify which cell\n");
-		log("        ports to use for this. the syntax for a rule is a '-' for exclusion\n");
-		log("        and a '+' for inclusion, followed by an optional comma seperated\n");
-		log("        list of cell types followed by an optional comma separated list of\n");
-		log("        cell ports in square brackets. a rule can also be just a cell or wire\n");
-		log("        name that limits the expansion (is included but does not go beyond).\n");
-		log("        select at most <num2> objects. a warning message is printed when this\n");
-		log("        limit is reached. When '*' is used instead of <num1> then the process\n");
-		log("        is repeated until no further object are selected.\n");
-		log("\n");
-		log("    %%ci[<num1>|*][.<num2>][:<rule>[:<rule>..]]\n");
-		log("    %%co[<num1>|*][.<num2>][:<rule>[:<rule>..]]\n");
-		log("        simmilar to %%x, but only select input (%%ci) or output cones (%%co)\n");
-		log("\n");
-		log("Example: the following command selects all wires that are connected to a\n");
-		log("'GATE' input of a 'SWITCH' cell:\n");
-		log("\n");
-		log("    select */t:SWITCH %%x:+[GATE] */t:SWITCH %%d\n");
-		log("\n");
-	}
-	virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
-	{
-		bool add_mode = false;
-		bool del_mode = false;
-		bool clear_mode = false;
-		bool list_mode = false;
-		bool count_mode = false;
-		bool got_module = false;
-		std::string write_file;
-		std::string set_name;
-
-		work_stack.clear();
-
-		size_t argidx;
-		for (argidx = 1; argidx < args.size(); argidx++)
-		{
-			std::string arg = args[argidx];
-			if (arg == "-add") {
-				add_mode = true;
-				continue;
-			}
-			if (arg == "-del") {
-				del_mode = true;
-				continue;
-			}
-			if (arg == "-clear") {
-				clear_mode = true;
-				continue;
-			}
-			if (arg == "-list") {
-				list_mode = true;
-				continue;
-			}
-			if (arg == "-write" && argidx+1 < args.size()) {
-				write_file = args[++argidx];
-				continue;
-			}
-			if (arg == "-count") {
-				count_mode = true;
-				continue;
-			}
-			if (arg == "-module" && argidx+1 < args.size()) {
-				RTLIL::IdString mod_name = RTLIL::escape_id(args[++argidx]);
-				if (design->modules.count(mod_name) == 0)
-					log_cmd_error("No such module: %s\n", id2cstr(mod_name));
-				design->selected_active_module = mod_name;
-				got_module = true;
-				continue;
-			}
-			if (arg == "-set" && argidx+1 < args.size()) {
-				set_name = RTLIL::escape_id(args[++argidx]);
-				continue;
-			}
-			if (arg.size() > 0 && arg[0] == '-')
-				log_cmd_error("Unkown option %s.\n", arg.c_str());
-			select_stmt(design, arg);
-		}
-
-		if (clear_mode && args.size() != 2)
-			log_cmd_error("Option -clear can not be combined with other options.\n");
-
-		if (add_mode && del_mode)
-			log_cmd_error("Options -add and -del can not be combined.\n");
-
-		if ((list_mode || !write_file.empty() || count_mode) && (add_mode || del_mode))
-			log_cmd_error("Options -list, -write and -count can not be combined with -add or -del.\n");
-
-		if (!set_name.empty() && (list_mode || !write_file.empty() || count_mode || add_mode || del_mode))
-			log_cmd_error("Option -set can not be combined with -list, -write, -count, -add or -del.\n");
-
-		if (work_stack.size() == 0 && got_module) {
-			RTLIL::Selection sel;
-			select_filter_active_mod(design, sel);
-			work_stack.push_back(sel);
-		}
-
-		while (work_stack.size() > 1) {
-			select_op_union(design, work_stack.front(), work_stack.back());
-			work_stack.pop_back();
-		}
-
-		assert(design->selection_stack.size() > 0);
-
-		if (clear_mode)
-		{
-			design->selection_stack.back() = RTLIL::Selection(true);
-			design->selected_active_module = std::string();
-			return;
-		}
-
-		if (list_mode || count_mode || !write_file.empty())
-		{
-		#define LOG_OBJECT(...) do { if (list_mode) log(__VA_ARGS__); if (f != NULL) fprintf(f, __VA_ARGS__); total_count++; } while (0)
-			int total_count = 0;
-			FILE *f = NULL;
-			if (!write_file.empty()) {
-				f = fopen(write_file.c_str(), "w");
-				if (f == NULL)
-					log_error("Can't open '%s' for writing: %s\n", write_file.c_str(), strerror(errno));
-			}
-			RTLIL::Selection *sel = &design->selection_stack.back();
-			if (work_stack.size() > 0)
-				sel = &work_stack.back();
-			sel->optimize(design);
-			for (auto mod_it : design->modules)
-			{
-				if (sel->selected_whole_module(mod_it.first) && list_mode)
-					log("%s\n", id2cstr(mod_it.first));
-				if (sel->selected_module(mod_it.first)) {
-					for (auto &it : mod_it.second->wires)
-						if (sel->selected_member(mod_it.first, it.first))
-							LOG_OBJECT("%s/%s\n", id2cstr(mod_it.first), id2cstr(it.first));
-					for (auto &it : mod_it.second->memories)
-						if (sel->selected_member(mod_it.first, it.first))
-							LOG_OBJECT("%s/%s\n", id2cstr(mod_it.first), id2cstr(it.first));
-					for (auto &it : mod_it.second->cells)
-						if (sel->selected_member(mod_it.first, it.first))
-							LOG_OBJECT("%s/%s\n", id2cstr(mod_it.first), id2cstr(it.first));
-					for (auto &it : mod_it.second->processes)
-						if (sel->selected_member(mod_it.first, it.first))
-							LOG_OBJECT("%s/%s\n", id2cstr(mod_it.first), id2cstr(it.first));
-				}
-			}
-			if (count_mode)
-				log("%d objects.\n", total_count);
-			if (f != NULL)
-				fclose(f);
-		#undef LOG_OBJECT
-			return;
-		}
-
-		if (add_mode)
-		{
-			if (work_stack.size() == 0)
-				log_cmd_error("Nothing to add to selection.\n");
-			select_op_union(design, design->selection_stack.back(), work_stack.back());
-			design->selection_stack.back().optimize(design);
-			return;
-		}
-
-		if (del_mode)
-		{
-			if (work_stack.size() == 0)
-				log_cmd_error("Nothing to delete from selection.\n");
-			select_op_diff(design, design->selection_stack.back(), work_stack.back());
-			design->selection_stack.back().optimize(design);
-			return;
-		}
-
-		if (!set_name.empty())
-		{
-			if (work_stack.size() == 0)
-				design->selection_vars.erase(set_name);
-			else
-				design->selection_vars[set_name] = work_stack.back();
-			return;
-		}
-
-		if (work_stack.size() == 0) {
-			RTLIL::Selection &sel = design->selection_stack.back();
-			if (sel.full_selection)
-				log("*\n");
-			for (auto &it : sel.selected_modules)
-				log("%s\n", id2cstr(it));
-			for (auto &it : sel.selected_members)
-				for (auto &it2 : it.second)
-					log("%s/%s\n", id2cstr(it.first), id2cstr(it2));
-			return;
-		}
-
-		design->selection_stack.back() = work_stack.back();
-		design->selection_stack.back().optimize(design);
-	}
-} SelectPass;
- 
-struct CdPass : public Pass {
-	CdPass() : Pass("cd", "a shortcut for 'select -module <name>'") { }
-	virtual void help()
-	{
-		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
-		log("\n");
-		log("    cd <modname>\n");
-		log("\n");
-		log("This is just a shortcut for 'select -module <modname>'.\n");
-		log("\n");
-		log("\n");
-		log("    cd <cellname>\n");
-		log("\n");
-		log("When no module with the specified name is found, but there is a cell\n");
-		log("with the specified name in the current module, then this is equivialent\n");
-		log("to 'cd <celltype>'.\n");
-		log("\n");
-		log("    cd ..\n");
-		log("\n");
-		log("This is just a shortcut for 'select -clear'.\n");
-		log("\n");
-	}
-	virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
-	{
-		if (args.size() != 2)
-			log_cmd_error("Invalid number of arguments.\n");
-
-		if (args[1] == "..") {
-			design->selection_stack.back() = RTLIL::Selection(true);
-			design->selected_active_module = std::string();
-			return;
-		}
-
-		std::string modname = RTLIL::escape_id(args[1]);
-
-		if (design->modules.count(modname) == 0 && !design->selected_active_module.empty()) {
-			RTLIL::Module *module = NULL;
-			if (design->modules.count(design->selected_active_module) > 0)
-				module = design->modules.at(design->selected_active_module);
-			if (module != NULL && module->cells.count(modname) > 0)
-				modname = module->cells.at(modname)->type;
-		}
-
-		if (design->modules.count(modname) > 0) {
-			design->selected_active_module = modname;
-			design->selection_stack.back() = RTLIL::Selection();
-			select_filter_active_mod(design, design->selection_stack.back());
-			design->selection_stack.back().optimize(design);
-			return;
-		}
-
-		log_cmd_error("No such module `%s' found!\n", RTLIL::id2cstr(modname));
-	}
-} CdPass;
- 
-struct LsPass : public Pass {
-	LsPass() : Pass("ls", "list modules or objects in modules") { }
-	virtual void help()
-	{
-		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
-		log("\n");
-		log("    ls\n");
-		log("\n");
-		log("When no active module is selected, this prints a list of all module.\n");
-		log("\n");
-		log("When an active module is selected, this prints a list of objects in the module.\n");
-		log("\n");
-	}
-	virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
-	{
-		if (args.size() != 1)
-			log_cmd_error("Invalid number of arguments.\n");
-
-		if (design->selected_active_module.empty())
-		{
-			log("\n%d modules:\n", int(design->modules.size()));
-			for (auto &it : design->modules)
-				log("  %s\n", RTLIL::id2cstr(it.first));
-		}
-		else
-		if (design->modules.count(design->selected_active_module) > 0)
-		{
-			RTLIL::Module *module = design->modules.at(design->selected_active_module);
-
-			if (module->wires.size()) {
-				log("\n%d wires:\n", int(module->wires.size()));
-				for (auto &it : module->wires)
-					log("  %s\n", RTLIL::id2cstr(it.first));
-			}
-
-			if (module->memories.size()) {
-				log("\n%d memories:\n", int(module->memories.size()));
-				for (auto &it : module->memories)
-					log("  %s\n", RTLIL::id2cstr(it.first));
-			}
-
-			if (module->cells.size()) {
-				log("\n%d cells:\n", int(module->cells.size()));
-				for (auto &it : module->cells)
-					log("  %s\n", RTLIL::id2cstr(it.first));
-			}
-
-			if (module->processes.size()) {
-				log("\n%d processes:\n", int(module->processes.size()));
-				for (auto &it : module->processes)
-					log("  %s\n", RTLIL::id2cstr(it.first));
-			}
-		}
-	}
-} LsPass;
- 
diff --git a/kernel/show.cc b/kernel/show.cc
deleted file mode 100644
index c66320b3e..000000000
--- a/kernel/show.cc
+++ /dev/null
@@ -1,684 +0,0 @@
-/*
- *  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.
- *
- */
-
-#include "kernel/register.h"
-#include "kernel/celltypes.h"
-#include "kernel/log.h"
-#include <string.h>
-#include <dirent.h>
-
-using RTLIL::id2cstr;
-
-#undef CLUSTER_CELLS_AND_PORTBOXES
-
-struct ShowWorker
-{
-	CellTypes ct;
-
-	std::vector<std::string> dot_escape_store;
-	std::map<RTLIL::IdString, int> dot_id2num_store;
-	std::map<RTLIL::IdString, int> autonames;
-	int single_idx_count;
-
-	struct net_conn { std::set<std::string> in, out; int bits; std::string color; };
-	std::map<std::string, net_conn> net_conn_map;
-
-	FILE *f;
-	RTLIL::Design *design;
-	RTLIL::Module *module;
-	uint32_t currentColor;
-	bool genWidthLabels;
-	bool stretchIO;
-	int page_counter;
-
-	const std::vector<std::pair<std::string, RTLIL::Selection>> &color_selections;
-	const std::vector<std::pair<std::string, RTLIL::Selection>> &label_selections;
-
-	uint32_t xorshift32(uint32_t x) {
-		x ^= x << 13;
-		x ^= x >> 17;
-		x ^= x << 5;
-		return x;
-	}
-
-	std::string nextColor()
-	{
-		if (currentColor == 0)
-			return "color=\"black\"";
-		return stringf("colorscheme=\"dark28\", color=\"%d\", fontcolor=\"%d\"", currentColor%8+1);
-	}
-
-	std::string nextColor(std::string presetColor)
-	{
-		if (presetColor.empty())
-			return nextColor();
-		return presetColor;
-	}
-
-	std::string nextColor(RTLIL::SigSpec sig, std::string defaultColor)
-	{
-		sig.sort_and_unify();
-		for (auto &c : sig.chunks) {
-			if (c.wire != NULL)
-				for (auto &s : color_selections)
-					if (s.second.selected_members.count(module->name) > 0 && s.second.selected_members.at(module->name).count(c.wire->name) > 0)
-						return stringf("color=\"%s\", fontcolor=\"%d\"", s.first.c_str(), s.first.c_str());
-		}
-		return defaultColor;
-	}
-
-	std::string nextColor(RTLIL::SigSig &conn, std::string defaultColor)
-	{
-		return nextColor(conn.first, nextColor(conn.second, defaultColor));
-	}
-
-	std::string nextColor(RTLIL::SigSpec &sig)
-	{
-		return nextColor(sig, nextColor());
-	}
-
-	std::string nextColor(RTLIL::SigSig &conn)
-	{
-		return nextColor(conn, nextColor());
-	}
-
-	std::string widthLabel(int bits)
-	{
-		if (bits <= 1)
-			return "label=\"\"";
-		if (!genWidthLabels)
-			return "style=\"setlinewidth(3)\", label=\"\"";
-		return stringf("style=\"setlinewidth(3)\", label=\"<%d>\"", bits);
-	}
-
-	const char *escape(std::string id, bool is_name = false)
-	{
-		if (id.size() == 0)
-			return "";
-
-		if (id[0] == '$' && is_name) {
-			if (autonames.count(id) == 0) {
-				autonames[id] = autonames.size() + 1;
-				log("Generated short name for internal identifier: _%d_ -> %s\n", autonames[id], id.c_str());
-			}
-			id = stringf("_%d_", autonames[id]);
-		}
-
-		if (id[0] == '\\')
-			id = id.substr(1);
-
-		std::string str;
-		for (char ch : id) {
-			if (ch == '\\' || ch == '"')
-				str += "\\";
-			str += ch;
-		}
-
-		dot_escape_store.push_back(str);
-		return dot_escape_store.back().c_str();
-	}
-
-	int id2num(RTLIL::IdString id)
-	{
-		if (dot_id2num_store.count(id) > 0)
-			return dot_id2num_store[id];
-		return dot_id2num_store[id] = dot_id2num_store.size() + 1;
-	}
-
-	std::string gen_signode_simple(RTLIL::SigSpec sig, bool range_check = true)
-	{
-		sig.optimize();
-
-		if (sig.chunks.size() == 0) {
-			fprintf(f, "v%d [ label=\"\" ];\n", single_idx_count);
-			return stringf("v%d", single_idx_count++);
-		}
-
-		if (sig.chunks.size() == 1) {
-			RTLIL::SigChunk &c = sig.chunks[0];
-			if (c.wire != NULL && design->selected_member(module->name, c.wire->name)) {
-				if (!range_check || c.wire->width == c.width)
-						return stringf("n%d", id2num(c.wire->name));
-			} else {
-				fprintf(f, "v%d [ label=\"%s\" ];\n", single_idx_count, escape(log_signal(c), true));
-				return stringf("v%d", single_idx_count++);
-			}
-		}
-
-		return std::string();
-	}
-
-	std::string gen_portbox(std::string port, RTLIL::SigSpec sig, bool driver, std::string *node = NULL)
-	{
-		std::string code;
-		std::string net = gen_signode_simple(sig);
-		if (net.empty())
-		{
-			std::string label_string;
-			sig.optimize();
-			int pos = sig.width-1;
-			int idx = single_idx_count++;
-			for (int i = int(sig.chunks.size())-1; i >= 0; i--) {
-				RTLIL::SigChunk &c = sig.chunks[i];
-				net = gen_signode_simple(c, false);
-				assert(!net.empty());
-				if (driver) {
-					label_string += stringf("<s%d> %d:%d - %d:%d |", i, pos, pos-c.width+1, c.offset+c.width-1, c.offset);
-					net_conn_map[net].in.insert(stringf("x%d:s%d", idx, i));
-					net_conn_map[net].bits = c.width;
-					net_conn_map[net].color = nextColor(c, net_conn_map[net].color);
-				} else {
-					label_string += stringf("<s%d> %d:%d - %d:%d |", i, c.offset+c.width-1, c.offset, pos, pos-c.width+1);
-					net_conn_map[net].out.insert(stringf("x%d:s%d", idx, i));
-					net_conn_map[net].bits = c.width;
-					net_conn_map[net].color = nextColor(c, net_conn_map[net].color);
-				}
-				pos -= c.width;
-			}
-			if (label_string[label_string.size()-1] == '|')
-				label_string = label_string.substr(0, label_string.size()-1);
-			code += stringf("x%d [ shape=record, style=rounded, label=\"%s\" ];\n", idx, label_string.c_str());
-			if (!port.empty()) {
-				currentColor = xorshift32(currentColor);
-				if (driver)
-					code += stringf("%s:e -> x%d:w [arrowhead=odiamond, arrowtail=odiamond, dir=both, %s, %s];\n", port.c_str(), idx, nextColor(sig).c_str(), widthLabel(sig.width).c_str());
-				else
-					code += stringf("x%d:e -> %s:w [arrowhead=odiamond, arrowtail=odiamond, dir=both, %s, %s];\n", idx, port.c_str(), nextColor(sig).c_str(), widthLabel(sig.width).c_str());
-			}
-			if (node != NULL)
-				*node = stringf("x%d", idx);
-		}
-		else
-		{
-			if (!port.empty()) {
-				if (driver)
-					net_conn_map[net].in.insert(port);
-				else
-					net_conn_map[net].out.insert(port);
-				net_conn_map[net].bits = sig.width;
-				net_conn_map[net].color = nextColor(sig, net_conn_map[net].color);
-			}
-			if (node != NULL)
-				*node = net;
-		}
-		return code;
-	}
-
-	void collect_proc_signals(std::vector<RTLIL::SigSpec> &obj, std::set<RTLIL::SigSpec> &signals)
-	{
-		for (auto &it : obj)
-			if (!it.is_fully_const())
-				signals.insert(it);
-	}
-
-	void collect_proc_signals(std::vector<RTLIL::SigSig> &obj, std::set<RTLIL::SigSpec> &input_signals, std::set<RTLIL::SigSpec> &output_signals)
-	{
-		for (auto &it : obj) {
-			output_signals.insert(it.first);
-			if (!it.second.is_fully_const())
-				input_signals.insert(it.second);
-		}
-	}
-
-	void collect_proc_signals(RTLIL::CaseRule *obj, std::set<RTLIL::SigSpec> &input_signals, std::set<RTLIL::SigSpec> &output_signals)
-	{
-		collect_proc_signals(obj->compare, input_signals);
-		collect_proc_signals(obj->actions, input_signals, output_signals);
-		for (auto it : obj->switches)
-			collect_proc_signals(it, input_signals, output_signals);
-	}
-
-	void collect_proc_signals(RTLIL::SwitchRule *obj, std::set<RTLIL::SigSpec> &input_signals, std::set<RTLIL::SigSpec> &output_signals)
-	{
-		input_signals.insert(obj->signal);
-		for (auto it : obj->cases)
-			collect_proc_signals(it, input_signals, output_signals);
-	}
-
-	void collect_proc_signals(RTLIL::SyncRule *obj, std::set<RTLIL::SigSpec> &input_signals, std::set<RTLIL::SigSpec> &output_signals)
-	{
-		input_signals.insert(obj->signal);
-		collect_proc_signals(obj->actions, input_signals, output_signals);
-	}
-
-	void collect_proc_signals(RTLIL::Process *obj, std::set<RTLIL::SigSpec> &input_signals, std::set<RTLIL::SigSpec> &output_signals)
-	{
-		collect_proc_signals(&obj->root_case, input_signals, output_signals);
-		for (auto it : obj->syncs)
-			collect_proc_signals(it, input_signals, output_signals);
-	}
-
-	void handle_module()
-	{
-		single_idx_count = 0;
-		dot_escape_store.clear();
-		dot_id2num_store.clear();
-		net_conn_map.clear();
-
-		fprintf(f, "digraph \"%s\" {\n", escape(module->name));
-		fprintf(f, "label=\"%s\";\n", escape(module->name));
-		fprintf(f, "rankdir=\"LR\";\n");
-		fprintf(f, "remincross=true;\n");
-
-		std::set<std::string> all_sources, all_sinks;
-
-		std::map<std::string, std::string> wires_on_demand;
-		for (auto &it : module->wires) {
-			if (!design->selected_member(module->name, it.first))
-				continue;
-			const char *shape = "diamond";
-			if (it.second->port_input || it.second->port_output)
-				shape = "octagon";
-			if (it.first[0] == '\\') {
-				fprintf(f, "n%d [ shape=%s, label=\"%s\", %s, fontcolor=\"black\" ];\n",
-						id2num(it.first), shape, escape(it.first),
-						nextColor(RTLIL::SigSpec(it.second), "color=\"black\"").c_str());
-				if (it.second->port_input)
-					all_sources.insert(stringf("n%d", id2num(it.first)));
-				else if (it.second->port_output)
-					all_sinks.insert(stringf("n%d", id2num(it.first)));
-			} else {
-				wires_on_demand[stringf("n%d", id2num(it.first))] = it.first;
-			}
-		}
-
-		if (stretchIO)
-		{
-			fprintf(f, "{ rank=\"source\";");
-			for (auto n : all_sources)
-				fprintf(f, " %s;", n.c_str());
-			fprintf(f, "}\n");
-
-			fprintf(f, "{ rank=\"sink\";");
-			for (auto n : all_sinks)
-				fprintf(f, " %s;", n.c_str());
-			fprintf(f, "}\n");
-		}
-
-		for (auto &it : module->cells)
-		{
-			if (!design->selected_member(module->name, it.first))
-				continue;
-
-			std::vector<RTLIL::IdString> in_ports, out_ports;
-
-			for (auto &conn : it.second->connections) {
-				if (!ct.cell_output(it.second->type, conn.first))
-					in_ports.push_back(conn.first);
-				else
-					out_ports.push_back(conn.first);
-			}
-
-			std::string label_string = "{{";
-
-			for (auto &p : in_ports)
-				label_string += stringf("<p%d> %s|", id2num(p), escape(p));
-			if (label_string[label_string.size()-1] == '|')
-				label_string = label_string.substr(0, label_string.size()-1);
-
-			label_string += stringf("}|%s\\n%s|{", escape(it.first, true), escape(it.second->type));
-
-			for (auto &p : out_ports)
-				label_string += stringf("<p%d> %s|", id2num(p), escape(p));
-			if (label_string[label_string.size()-1] == '|')
-				label_string = label_string.substr(0, label_string.size()-1);
-
-			label_string += "}}";
-
-			std::string code;
-			for (auto &conn : it.second->connections) {
-				code += gen_portbox(stringf("c%d:p%d", id2num(it.first), id2num(conn.first)),
-						conn.second, ct.cell_output(it.second->type, conn.first));
-			}
-
-#ifdef CLUSTER_CELLS_AND_PORTBOXES
-			if (!code.empty())
-				fprintf(f, "subgraph cluster_c%d {\nc%d [ shape=record, label=\"%s\" ];\n%s}\n",
-						id2num(it.first), id2num(it.first), label_string.c_str(), code.c_str());
-			else
-#endif
-				fprintf(f, "c%d [ shape=record, label=\"%s\" ];\n%s",
-						id2num(it.first), label_string.c_str(), code.c_str());
-		}
-
-		for (auto &it : module->processes)
-		{
-			RTLIL::Process *proc = it.second;
-
-			if (!design->selected_member(module->name, proc->name))
-				continue;
-
-			std::set<RTLIL::SigSpec> input_signals, output_signals;
-			collect_proc_signals(proc, input_signals, output_signals);
-
-			int pidx = single_idx_count++;
-			input_signals.erase(RTLIL::SigSpec());
-			output_signals.erase(RTLIL::SigSpec());
-
-			for (auto &sig : input_signals) {
-				std::string code, node;
-				code += gen_portbox("", sig, false, &node);
-				fprintf(f, "%s", code.c_str());
-				net_conn_map[node].out.insert(stringf("p%d", pidx));
-			}
-
-			for (auto &sig : output_signals) {
-				std::string code, node;
-				code += gen_portbox("", sig, true, &node);
-				fprintf(f, "%s", code.c_str());
-				net_conn_map[node].in.insert(stringf("p%d", pidx));
-			}
-
-			fprintf(f, "p%d [shape=box, style=rounded, label=\"PROC\\n%s\"];\n", pidx, RTLIL::id2cstr(proc->name));
-		}
-
-		for (auto &conn : module->connections)
-		{
-			bool found_lhs_wire = false;
-			for (auto &c : conn.first.chunks) {
-				if (c.wire == NULL || design->selected_member(module->name, c.wire->name))
-					found_lhs_wire = true;
-			}
-			bool found_rhs_wire = false;
-			for (auto &c : conn.second.chunks) {
-				if (c.wire == NULL || design->selected_member(module->name, c.wire->name))
-					found_rhs_wire = true;
-			}
-			if (!found_lhs_wire || !found_rhs_wire)
-				continue;
-
-			std::string code, left_node, right_node;
-			code += gen_portbox("", conn.second, false, &left_node);
-			code += gen_portbox("", conn.first, true, &right_node);
-			fprintf(f, "%s", code.c_str());
-
-			if (left_node[0] == 'x' && right_node[0] == 'x') {
-				currentColor = xorshift32(currentColor);
-				fprintf(f, "%s:e -> %s:w [arrowhead=odiamond, arrowtail=odiamond, dir=both, %s, %s];\n", left_node.c_str(), right_node.c_str(), nextColor(conn).c_str(), widthLabel(conn.first.width).c_str());
-			} else {
-				net_conn_map[right_node].bits = conn.first.width;
-				net_conn_map[right_node].color = nextColor(conn, net_conn_map[right_node].color);
-				net_conn_map[left_node].bits = conn.first.width;
-				net_conn_map[left_node].color = nextColor(conn, net_conn_map[left_node].color);
-				if (left_node[0] == 'x') {
-					net_conn_map[right_node].in.insert(left_node);
-				} else if (right_node[0] == 'x') {
-					net_conn_map[left_node].out.insert(right_node);
-				} else {
-					net_conn_map[right_node].in.insert(stringf("x%d:e", single_idx_count));
-					net_conn_map[left_node].out.insert(stringf("x%d:w", single_idx_count));
-					fprintf(f, "x%d [shape=box, style=rounded, label=\"BUF\"];\n", single_idx_count++);
-				}
-			}
-		}
-
-		for (auto &it : net_conn_map)
-		{
-			currentColor = xorshift32(currentColor);
-			if (wires_on_demand.count(it.first) > 0) {
-				if (it.second.in.size() == 1 && it.second.out.size() > 1 && it.second.in.begin()->substr(0, 1) == "p")
-					it.second.out.erase(*it.second.in.begin());
-				if (it.second.in.size() == 1 && it.second.out.size() == 1) {
-					std::string from = *it.second.in.begin(), to = *it.second.out.begin();
-					if (from != to || from.substr(0, 1) != "p")
-						fprintf(f, "%s:e -> %s:w [%s, %s];\n", from.c_str(), to.c_str(), nextColor(it.second.color).c_str(), widthLabel(it.second.bits).c_str());
-					continue;
-				}
-				if (it.second.in.size() == 0 || it.second.out.size() == 0)
-					fprintf(f, "%s [ shape=diamond, label=\"%s\" ];\n", it.first.c_str(), escape(wires_on_demand[it.first], true));
-				else
-					fprintf(f, "%s [ shape=point ];\n", it.first.c_str());
-			}
-			for (auto &it2 : it.second.in)
-				fprintf(f, "%s:e -> %s:w [%s, %s];\n", it2.c_str(), it.first.c_str(), nextColor(it.second.color).c_str(), widthLabel(it.second.bits).c_str());
-			for (auto &it2 : it.second.out)
-				fprintf(f, "%s:e -> %s:w [%s, %s];\n", it.first.c_str(), it2.c_str(), nextColor(it.second.color).c_str(), widthLabel(it.second.bits).c_str());
-		}
-
-		fprintf(f, "};\n");
-	}
-
-	ShowWorker(FILE *f, RTLIL::Design *design, std::vector<RTLIL::Design*> &libs, uint32_t colorSeed, bool genWidthLabels, bool stretchIO,
-			const std::vector<std::pair<std::string, RTLIL::Selection>> &color_selections,
-			const std::vector<std::pair<std::string, RTLIL::Selection>> &label_selections) :
-			f(f), design(design), currentColor(colorSeed), genWidthLabels(genWidthLabels), stretchIO(stretchIO),
-			color_selections(color_selections), label_selections(label_selections)
-	{
-		ct.setup_internals();
-		ct.setup_internals_mem();
-		ct.setup_stdcells();
-		ct.setup_stdcells_mem();
-		ct.setup_design(design);
-
-		for (auto lib : libs)
-			ct.setup_design(lib);
-
-		design->optimize();
-		page_counter = 0;
-		for (auto &mod_it : design->modules)
-		{
-			module = mod_it.second;
-			if (!design->selected_module(module->name))
-				continue;
-			if (design->selected_whole_module(module->name)) {
-				if (module->attributes.count("\\placeholder") > 0) {
-					log("Skipping placeholder module %s.\n", id2cstr(module->name));
-					continue;
-				} else
-				if (module->cells.empty() && module->connections.empty() && module->processes.empty()) {
-					log("Skipping empty module %s.\n", id2cstr(module->name));
-					continue;
-				} else
-					log("Dumping module %s to page %d.\n", id2cstr(module->name), ++page_counter);
-			} else
-				log("Dumping selected parts of module %s to page %d.\n", id2cstr(module->name), ++page_counter);
-			handle_module();
-		}
-	}
-};
-
-struct ShowPass : public Pass {
-	ShowPass() : Pass("show", "generate schematics using graphviz") { }
-	virtual void help()
-	{
-		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
-		log("\n");
-		log("    show [options] [selection]\n");
-		log("\n");
-		log("Create a graphviz DOT file for the selected part of the design and compile it\n");
-		log("to a graphics file (usually SVG or PostScript).\n");
-		log("\n");
-		log("    -viewer <viewer>\n");
-		log("        Run the specified command with the graphics file as parameter.\n");
-		log("\n");
-		log("    -format <format>\n");
-		log("        Generate a graphics file in the specified format.\n");
-		log("        Usually <format> is 'svg' or 'ps'.\n");
-		log("\n");
-		log("    -lib <verilog_or_ilang_file>\n");
-		log("        Use the specified library file for determining whether cell ports are\n");
-		log("        inputs or outputs. This option can be used multiple times to specify\n");
-		log("        more than one library.\n");
-		log("\n");
-		log("    -prefix <prefix>\n");
-		log("        generate <prefix>.dot and <prefix>.ps instead of yosys-show.{dot,ps}\n");
-		log("\n");
-		log("    -color <color> <wire>\n");
-		log("        assign the specified color to the specified wire. The object can be\n");
-		log("        a single selection wildcard expressions or a saved set of objects in\n");
-		log("        the @<name> syntax (see \"help select\" for details).\n");
-		log("\n");
-		log("    -colors <seed>\n");
-		log("        Randomly assign colors to the wires. The integer argument is the seed\n");
-		log("        for the random number generator. Change the seed value if the colored\n");
-		log("        graph still is ambigous. A seed of zero deactivates the coloring.\n");
-		log("\n");
-		log("    -width\n");
-		log("        annotate busses with a label indicating the width of the bus.\n");
-		log("\n");
-		log("    -stretch\n");
-		log("        stretch the graph so all inputs are on the left side and all outputs\n");
-		log("        (including inout ports) are on the right side.\n");
-		log("\n");
-		log("When no <format> is specified, SVG is used. When no <format> and <viewer> is\n");
-		log("specified, 'yosys-svgviewer' is used to display the schematic.\n");
-		log("\n");
-		log("The generated output files are 'yosys-show.dot' and 'yosys-show.<format>',\n");
-		log("unless another prefix is specified using -prefix <prefix>.\n");
-		log("\n");
-	}
-	virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
-	{
-		log_header("Generating Graphviz representation of design.\n");
-		log_push();
-
-		std::vector<std::pair<std::string, RTLIL::Selection>> color_selections;
-		std::vector<std::pair<std::string, RTLIL::Selection>> label_selections;
-
-		std::string format;
-		std::string viewer_exe;
-		std::string prefix = "yosys-show";
-		std::vector<std::string> libfiles;
-		std::vector<RTLIL::Design*> libs;
-		uint32_t colorSeed = 0;
-		bool flag_width = false;
-		bool flag_stretch = false;
-
-		size_t argidx;
-		for (argidx = 1; argidx < args.size(); argidx++)
-		{
-			std::string arg = args[argidx];
-			if (arg == "-viewer" && argidx+1 < args.size()) {
-				viewer_exe = args[++argidx];
-				continue;
-			}
-			if (arg == "-lib" && argidx+1 < args.size()) {
-				libfiles.push_back(args[++argidx]);
-				continue;
-			}
-			if (arg == "-prefix" && argidx+1 < args.size()) {
-				prefix = args[++argidx];
-				continue;
-			}
-			if (arg == "-color" && argidx+2 < args.size()) {
-				std::pair<std::string, RTLIL::Selection> data;
-				data.first = args[++argidx], argidx++;
-				handle_extra_select_args(this, args, argidx, argidx+1, design);
-				data.second = design->selection_stack.back();
-				design->selection_stack.pop_back();
-				color_selections.push_back(data);
-				continue;
-			}
-			if (arg == "-label" && argidx+2 < args.size() && false) {
-				std::pair<std::string, RTLIL::Selection> data;
-				data.first = args[++argidx], argidx++;
-				handle_extra_select_args(this, args, argidx, argidx+1, design);
-				data.second = design->selection_stack.back();
-				design->selection_stack.pop_back();
-				label_selections.push_back(data);
-				continue;
-			}
-			if (arg == "-colors" && argidx+1 < args.size()) {
-				colorSeed = atoi(args[++argidx].c_str());
-				continue;
-			}
-			if (arg == "-format" && argidx+1 < args.size()) {
-				format = args[++argidx];
-				continue;
-			}
-			if (arg == "-width") {
-				flag_width= true;
-				continue;
-			}
-			if (arg == "-stretch") {
-				flag_stretch= true;
-				continue;
-			}
-			break;
-		}
-		extra_args(args, argidx, design);
-
-		if (format != "ps") {
-			int modcount = 0;
-			for (auto &mod_it : design->modules) {
-				if (mod_it.second->attributes.count("\\placeholder") > 0)
-					continue;
-				if (mod_it.second->cells.empty() && mod_it.second->connections.empty())
-					continue;
-				if (design->selected_module(mod_it.first))
-					modcount++;
-			}
-			if (modcount > 1)
-				log_cmd_error("For formats different than 'ps' only one module must be selected.\n");
-		}
-
-		for (auto filename : libfiles) {
-			FILE *f = fopen(filename.c_str(), "rt");
-			if (f == NULL)
-				log_error("Can't open lib file `%s'.\n", filename.c_str());
-			RTLIL::Design *lib = new RTLIL::Design;
-			Frontend::frontend_call(lib, f, filename, (filename.size() > 3 && filename.substr(filename.size()-3) == ".il") ? "ilang" : "verilog");
-			libs.push_back(lib);
-			fclose(f);
-		}
-
-		if (libs.size() > 0)
-			log_header("Continuing show pass.\n");
-
-		std::string dot_file = stringf("%s.dot", prefix.c_str());
-		std::string out_file = stringf("%s.%s", prefix.c_str(), format.empty() ? "svg" : format.c_str());
-
-		log("Writing dot description to `%s'.\n", dot_file.c_str());
-		FILE *f = fopen(dot_file.c_str(), "w");
-		if (f == NULL) {
-			for (auto lib : libs)
-				delete lib;
-			log_cmd_error("Can't open dot file `%s' for writing.\n", dot_file.c_str());
-		}
-		ShowWorker worker(f, design, libs, colorSeed, flag_width, flag_stretch, color_selections, label_selections);
-		fclose(f);
-
-		for (auto lib : libs)
-			delete lib;
-
-		if (worker.page_counter == 0)
-			log_cmd_error("Nothing there to show.\n");
-
-		std::string cmd = stringf("dot -T%s -o '%s' '%s'", format.empty() ? "svg" : format.c_str(), out_file.c_str(), dot_file.c_str());
-		log("Exec: %s\n", cmd.c_str());
-		if (system(cmd.c_str()) != 0)
-			log_cmd_error("Shell command failed!\n");
-
-		if (!viewer_exe.empty()) {
-			cmd = stringf("%s '%s' &", viewer_exe.c_str(), out_file.c_str());
-			log("Exec: %s\n", cmd.c_str());
-			if (system(cmd.c_str()) != 0)
-				log_cmd_error("Shell command failed!\n");
-		} else
-		if (format.empty()) {
-			cmd = stringf("fuser -s '%s' || yosys-svgviewer '%s' &", out_file.c_str(), out_file.c_str());
-			log("Exec: %s\n", cmd.c_str());
-			if (system(cmd.c_str()) != 0)
-				log_cmd_error("Shell command failed!\n");
-		}
-
-		log_pop();
-	}
-} ShowPass;
-