From: Eddie Hung <eddie@fpgeh.com>
Date: Mon, 13 Jan 2020 17:22:42 +0000 (-0800)
Subject: Merge remote-tracking branch 'origin/master' into eddie/abc9_refactor
X-Git-Tag: working-ls180~849^2~36
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9f3cb981d7c0767f40febf0b32e0a19c28d8e6a0;p=yosys.git

Merge remote-tracking branch 'origin/master' into eddie/abc9_refactor
---

9f3cb981d7c0767f40febf0b32e0a19c28d8e6a0
diff --cc passes/techmap/abc9.cc
index 5d6d8904c,8a6195741..2ded1c162
--- a/passes/techmap/abc9.cc
+++ b/passes/techmap/abc9.cc
@@@ -18,18 -18,764 +18,69 @@@
   *
   */
  
+ // [[CITE]] ABC
+ // Berkeley Logic Synthesis and Verification Group, ABC: A System for Sequential Synthesis and Verification
+ // http://www.eecs.berkeley.edu/~alanmi/abc/
+ 
  #include "kernel/register.h"
 -#include "kernel/sigtools.h"
  #include "kernel/celltypes.h"
 -#include "kernel/cost.h"
 +#include "kernel/rtlil.h"
  #include "kernel/log.h"
 -#include <stdlib.h>
 -#include <stdio.h>
 -#include <string.h>
 -#include <cerrno>
 -#include <sstream>
 -#include <climits>
  
 -#ifndef _WIN32
 -#  include <unistd.h>
 -#  include <dirent.h>
 -#endif
 -
 -#include "frontends/aiger/aigerparse.h"
 -#include "kernel/utils.h"
 -
 -#ifdef YOSYS_LINK_ABC
 -extern "C" int Abc_RealMain(int argc, char *argv[]);
 -#endif
++// abc9_exe.cc
++std::string fold_abc9_cmd(std::string str);
+ 
  USING_YOSYS_NAMESPACE
  PRIVATE_NAMESPACE_BEGIN
  
 -int map_autoidx;
 -
 -inline std::string remap_name(RTLIL::IdString abc9_name)
 -{
 -	return stringf("$abc$%d$%s", map_autoidx, abc9_name.c_str()+1);
 -}
 -
 -void handle_loops(RTLIL::Design *design, RTLIL::Module *module)
 -{
 -	Pass::call(design, "scc -set_attr abc9_scc_id {} % w:*");
 -
 -	// For every unique SCC found, (arbitrarily) find the first
 -	// cell in the component, and select (and mark) all its output
 -	// wires
 -	pool<RTLIL::Const> ids_seen;
 -	for (auto cell : module->cells()) {
 -		auto it = cell->attributes.find(ID(abc9_scc_id));
 -		if (it != cell->attributes.end()) {
 -			auto r = ids_seen.insert(it->second);
 -			if (r.second) {
 -				for (auto &c : cell->connections_) {
 -					if (c.second.is_fully_const()) continue;
 -					if (cell->output(c.first)) {
 -						SigBit b = c.second.as_bit();
 -						Wire *w = b.wire;
 -						if (w->port_input) {
 -							// In this case, hopefully the loop break has been already created
 -							// Get the non-prefixed wire
 -							Wire *wo = module->wire(stringf("%s.abco", b.wire->name.c_str()));
 -							log_assert(wo != nullptr);
 -							log_assert(wo->port_output);
 -							log_assert(b.offset < GetSize(wo));
 -							c.second = RTLIL::SigBit(wo, b.offset);
 -						}
 -						else {
 -							// Create a new output/input loop break
 -							w->port_input = true;
 -							w = module->wire(stringf("%s.abco", w->name.c_str()));
 -							if (!w) {
 -								w = module->addWire(stringf("%s.abco", b.wire->name.c_str()), GetSize(b.wire));
 -								w->port_output = true;
 -							}
 -							else {
 -								log_assert(w->port_input);
 -								log_assert(b.offset < GetSize(w));
 -							}
 -							w->set_bool_attribute(ID(abc9_scc_break));
 -							c.second = RTLIL::SigBit(w, b.offset);
 -						}
 -					}
 -				}
 -			}
 -			cell->attributes.erase(it);
 -		}
 -	}
 -
 -	module->fixup_ports();
 -}
 -
 -std::string add_echos_to_abc9_cmd(std::string str)
 -{
 -	std::string new_str, token;
 -	for (size_t i = 0; i < str.size(); i++) {
 -		token += str[i];
 -		if (str[i] == ';') {
 -			while (i+1 < str.size() && str[i+1] == ' ')
 -				i++;
 -			new_str += "echo + " + token + " " + token + " ";
 -			token.clear();
 -		}
 -	}
 -
 -	if (!token.empty()) {
 -		if (!new_str.empty())
 -			new_str += "echo + " + token + "; ";
 -		new_str += token;
 -	}
 -
 -	return new_str;
 -}
 -
 -std::string fold_abc9_cmd(std::string str)
 -{
 -	std::string token, new_str = "          ";
 -	int char_counter = 10;
 -
 -	for (size_t i = 0; i <= str.size(); i++) {
 -		if (i < str.size())
 -			token += str[i];
 -		if (i == str.size() || str[i] == ';') {
 -			if (char_counter + token.size() > 75)
 -				new_str += "\n              ", char_counter = 14;
 -			new_str += token, char_counter += token.size();
 -			token.clear();
 -		}
 -	}
 -
 -	return new_str;
 -}
 -
 -std::string replace_tempdir(std::string text, std::string tempdir_name, bool show_tempdir)
 +struct Abc9Pass : public ScriptPass
  {
 -	if (show_tempdir)
 -		return text;
 -
 -	while (1) {
 -		size_t pos = text.find(tempdir_name);
 -		if (pos == std::string::npos)
 -			break;
 -		text = text.substr(0, pos) + "<abc-temp-dir>" + text.substr(pos + GetSize(tempdir_name));
 -	}
 -
 -	std::string  selfdir_name = proc_self_dirname();
 -	if (selfdir_name != "/") {
 -		while (1) {
 -			size_t pos = text.find(selfdir_name);
 -			if (pos == std::string::npos)
 -				break;
 -			text = text.substr(0, pos) + "<yosys-exe-dir>/" + text.substr(pos + GetSize(selfdir_name));
 -		}
 -	}
 -
 -	return text;
 -}
 -
 -struct abc9_output_filter
 -{
 -	bool got_cr;
 -	int escape_seq_state;
 -	std::string linebuf;
 -	std::string tempdir_name;
 -	bool show_tempdir;
 -
 -	abc9_output_filter(std::string tempdir_name, bool show_tempdir) : tempdir_name(tempdir_name), show_tempdir(show_tempdir)
 -	{
 -		got_cr = false;
 -		escape_seq_state = 0;
 -	}
 -
 -	void next_char(char ch)
 -	{
 -		if (escape_seq_state == 0 && ch == '\033') {
 -			escape_seq_state = 1;
 -			return;
 -		}
 -		if (escape_seq_state == 1) {
 -			escape_seq_state = ch == '[' ? 2 : 0;
 -			return;
 -		}
 -		if (escape_seq_state == 2) {
 -			if ((ch < '0' || '9' < ch) && ch != ';')
 -				escape_seq_state = 0;
 -			return;
 -		}
 -		escape_seq_state = 0;
 -		if (ch == '\r') {
 -			got_cr = true;
 -			return;
 -		}
 -		if (ch == '\n') {
 -			log("ABC: %s\n", replace_tempdir(linebuf, tempdir_name, show_tempdir).c_str());
 -			got_cr = false, linebuf.clear();
 -			return;
 -		}
 -		if (got_cr)
 -			got_cr = false, linebuf.clear();
 -		linebuf += ch;
 -	}
 -
 -	void next_line(const std::string &line)
 -	{
 -		//int pi, po;
 -		//if (sscanf(line.c_str(), "Start-point = pi%d.  End-point = po%d.", &pi, &po) == 2) {
 -		//	log("ABC: Start-point = pi%d (%s).  End-point = po%d (%s).\n",
 -		//			pi, pi_map.count(pi) ? pi_map.at(pi).c_str() : "???",
 -		//			po, po_map.count(po) ? po_map.at(po).c_str() : "???");
 -		//	return;
 -		//}
 -
 -		for (char ch : line)
 -			next_char(ch);
 -	}
 -};
 -
 -void abc9_module(RTLIL::Design *design, RTLIL::Module *module, std::string script_file, std::string exe_file,
 -		bool cleanup, vector<int> lut_costs, bool dff_mode, std::string delay_target, std::string /*lutin_shared*/, bool fast_mode,
 -		bool show_tempdir, std::string box_file, std::string lut_file,
 -		std::string wire_delay
 -)
 -{
 -	map_autoidx = autoidx++;
 -
 -	std::string tempdir_name = "/tmp/yosys-abc-XXXXXX";
 -	if (!cleanup)
 -		tempdir_name[0] = tempdir_name[4] = '_';
 -	tempdir_name = make_temp_dir(tempdir_name);
 -	log_header(design, "Extracting gate netlist of module `%s' to `%s/input.xaig'..\n",
 -			module->name.c_str(), replace_tempdir(tempdir_name, tempdir_name, show_tempdir).c_str());
 -
 -	std::string abc9_script;
 -
 -	if (!lut_costs.empty()) {
 -		abc9_script += stringf("read_lut %s/lutdefs.txt; ", tempdir_name.c_str());
 -		if (!box_file.empty())
 -			abc9_script += stringf("read_box %s; ", box_file.c_str());
 -	}
 -	else
 -	if (!lut_file.empty()) {
 -		abc9_script += stringf("read_lut %s; ", lut_file.c_str());
 -		if (!box_file.empty())
 -			abc9_script += stringf("read_box %s; ", box_file.c_str());
 -	}
 -	else
 -		log_abort();
 -
 -	abc9_script += stringf("&read %s/input.xaig; &ps; ", tempdir_name.c_str());
 -
 -	if (!script_file.empty()) {
 -		if (script_file[0] == '+') {
 -			for (size_t i = 1; i < script_file.size(); i++)
 -				if (script_file[i] == '\'')
 -					abc9_script += "'\\''";
 -				else if (script_file[i] == ',')
 -					abc9_script += " ";
 -				else
 -					abc9_script += script_file[i];
 -		} else
 -			abc9_script += stringf("source %s", script_file.c_str());
 -	} else if (!lut_costs.empty() || !lut_file.empty()) {
 -		abc9_script += fast_mode ? RTLIL::constpad.at("abc9.script.default.fast").substr(1,std::string::npos)
 -			: RTLIL::constpad.at("abc9.script.default").substr(1,std::string::npos);
 -	} else
 -		log_abort();
 -
 -	for (size_t pos = abc9_script.find("{D}"); pos != std::string::npos; pos = abc9_script.find("{D}", pos))
 -		abc9_script = abc9_script.substr(0, pos) + delay_target + abc9_script.substr(pos+3);
 -
 -	//for (size_t pos = abc9_script.find("{S}"); pos != std::string::npos; pos = abc9_script.find("{S}", pos))
 -	//	abc9_script = abc9_script.substr(0, pos) + lutin_shared + abc9_script.substr(pos+3);
 -
 -	for (size_t pos = abc9_script.find("{W}"); pos != std::string::npos; pos = abc9_script.find("{W}", pos))
 -		abc9_script = abc9_script.substr(0, pos) + wire_delay + abc9_script.substr(pos+3);
 -
 -	std::string C;
 -	if (design->scratchpad.count("abc9.if.C"))
 -		C = "-C " + design->scratchpad_get_string("abc9.if.C");
 -	for (size_t pos = abc9_script.find("{C}"); pos != std::string::npos; pos = abc9_script.find("{C}", pos))
 -		abc9_script = abc9_script.substr(0, pos) + C + abc9_script.substr(pos+3);
 -
 -	std::string R;
 -	if (design->scratchpad.count("abc9.if.R"))
 -		R = "-R " + design->scratchpad_get_string("abc9.if.R");
 -	for (size_t pos = abc9_script.find("{R}"); pos != std::string::npos; pos = abc9_script.find("{R}", pos))
 -		abc9_script = abc9_script.substr(0, pos) + R + abc9_script.substr(pos+3);
 -
 -	abc9_script += stringf("; &ps -l; &write -n %s/output.aig;", tempdir_name.c_str());
 -	if (design->scratchpad_get_bool("abc9.verify")) {
 -		if (dff_mode)
 -			abc9_script += "verify -s;";
 -		else
 -			abc9_script += "verify;";
 -	}
 -	abc9_script += "time";
 -	abc9_script = add_echos_to_abc9_cmd(abc9_script);
 -
 -	for (size_t i = 0; i+1 < abc9_script.size(); i++)
 -		if (abc9_script[i] == ';' && abc9_script[i+1] == ' ')
 -			abc9_script[i+1] = '\n';
 -
 -	FILE *f = fopen(stringf("%s/abc.script", tempdir_name.c_str()).c_str(), "wt");
 -	fprintf(f, "%s\n", abc9_script.c_str());
 -	fclose(f);
 -
 -	log_push();
 -
 -	handle_loops(design, module);
 -
 -	Pass::call(design, "aigmap -select");
 -
 -	Pass::call(design, stringf("write_xaiger -map %s/input.sym %s/input.xaig", tempdir_name.c_str(), tempdir_name.c_str()));
 -
 -	int count_outputs = design->scratchpad_get_int("write_xaiger.num_outputs");
 -	log("Extracted %d AND gates and %d wires to a netlist network with %d inputs and %d outputs.\n",
 -			design->scratchpad_get_int("write_xaiger.num_ands"),
 -			design->scratchpad_get_int("write_xaiger.num_wires"),
 -			design->scratchpad_get_int("write_xaiger.num_inputs"),
 -			count_outputs);
 -
 -	if (count_outputs > 0) {
 -		std::string buffer;
 -		std::ifstream ifs;
 -#if 0
 -		buffer = stringf("%s/%s", tempdir_name.c_str(), "input.xaig");
 -		ifs.open(buffer);
 -		if (ifs.fail())
 -			log_error("Can't open ABC output file `%s'.\n", buffer.c_str());
 -		buffer = stringf("%s/%s", tempdir_name.c_str(), "input.sym");
 -		log_assert(!design->module(ID($__abc9__)));
 -		{
 -			AigerReader reader(design, ifs, ID($__abc9__), "" /* clk_name */, /*buffer.c_str()*/ "" /* map_filename */, true /* wideports */);
 -			reader.parse_xaiger();
 -		}
 -		ifs.close();
 -		Pass::call_on_module(design, design->module(ID($__abc9__)), stringf("write_verilog -noexpr -norename -selected"));
 -		design->remove(design->module(ID($__abc9__)));
 -#endif
 -
 -		log_header(design, "Executing ABC9.\n");
 -
 -		if (!lut_costs.empty()) {
 -			buffer = stringf("%s/lutdefs.txt", tempdir_name.c_str());
 -			f = fopen(buffer.c_str(), "wt");
 -			if (f == NULL)
 -				log_error("Opening %s for writing failed: %s\n", buffer.c_str(), strerror(errno));
 -			for (int i = 0; i < GetSize(lut_costs); i++)
 -				fprintf(f, "%d %d.00 1.00\n", i+1, lut_costs.at(i));
 -			fclose(f);
 -		}
 -
 -		buffer = stringf("%s -s -f %s/abc.script 2>&1", exe_file.c_str(), tempdir_name.c_str());
 -		log("Running ABC command: %s\n", replace_tempdir(buffer, tempdir_name, show_tempdir).c_str());
 -
 -#ifndef YOSYS_LINK_ABC
 -		abc9_output_filter filt(tempdir_name, show_tempdir);
 -		int ret = run_command(buffer, std::bind(&abc9_output_filter::next_line, filt, std::placeholders::_1));
 -#else
 -		// These needs to be mutable, supposedly due to getopt
 -		char *abc9_argv[5];
 -		string tmp_script_name = stringf("%s/abc.script", tempdir_name.c_str());
 -		abc9_argv[0] = strdup(exe_file.c_str());
 -		abc9_argv[1] = strdup("-s");
 -		abc9_argv[2] = strdup("-f");
 -		abc9_argv[3] = strdup(tmp_script_name.c_str());
 -		abc9_argv[4] = 0;
 -		int ret = Abc_RealMain(4, abc9_argv);
 -		free(abc9_argv[0]);
 -		free(abc9_argv[1]);
 -		free(abc9_argv[2]);
 -		free(abc9_argv[3]);
 -#endif
 -		if (ret != 0)
 -			log_error("ABC: execution of command \"%s\" failed: return code %d.\n", buffer.c_str(), ret);
 -
 -		buffer = stringf("%s/%s", tempdir_name.c_str(), "output.aig");
 -		ifs.open(buffer, std::ifstream::binary);
 -		if (ifs.fail())
 -			log_error("Can't open ABC output file `%s'.\n", buffer.c_str());
 -
 -		buffer = stringf("%s/%s", tempdir_name.c_str(), "input.sym");
 -		log_assert(!design->module(ID($__abc9__)));
 -
 -		AigerReader reader(design, ifs, ID($__abc9__), "" /* clk_name */, buffer.c_str() /* map_filename */, true /* wideports */);
 -		reader.parse_xaiger();
 -		ifs.close();
 -
 -#if 0
 -		Pass::call_on_module(design, design->module(ID($__abc9__)), stringf("write_verilog -noexpr -norename -selected"));
 -#endif
 -
 -		log_header(design, "Re-integrating ABC9 results.\n");
 -		RTLIL::Module *mapped_mod = design->module(ID($__abc9__));
 -		if (mapped_mod == NULL)
 -			log_error("ABC output file does not contain a module `$__abc9__'.\n");
 -
 -		for (auto w : mapped_mod->wires())
 -			module->addWire(remap_name(w->name), GetSize(w));
 -
 -		dict<IdString, bool> abc9_box;
 -		vector<RTLIL::Cell*> boxes;
 -		for (auto cell : module->cells().to_vector()) {
 -			if (cell->type.in(ID($_AND_), ID($_NOT_), ID($__ABC9_FF_))) {
 -				module->remove(cell);
 -				continue;
 -			}
 -			RTLIL::Module* box_module = design->module(cell->type);
 -			auto jt = abc9_box.find(cell->type);
 -			if (jt == abc9_box.end())
 -				jt = abc9_box.insert(std::make_pair(cell->type, box_module && box_module->attributes.count(ID(abc9_box_id)))).first;
 -			if (jt->second) {
 -				if (box_module->get_bool_attribute("\\abc9_flop")) {
 -					if (dff_mode)
 -						boxes.emplace_back(cell);
 -					else
 -						box_module->set_bool_attribute("\\abc9_keep", false);
 -				}
 -				else
 -					boxes.emplace_back(cell);
 -			}
 -		}
 -
 -		dict<SigBit, pool<IdString>> bit_drivers, bit_users;
 -		TopoSort<IdString, RTLIL::sort_by_id_str> toposort;
 -		dict<RTLIL::Cell*,RTLIL::Cell*> not2drivers;
 -		dict<SigBit, std::vector<RTLIL::Cell*>> bit2sinks;
 -
 -		std::map<IdString, int> cell_stats;
 -		for (auto mapped_cell : mapped_mod->cells())
 -		{
 -			toposort.node(mapped_cell->name);
 -
 -			RTLIL::Cell *cell = nullptr;
 -			if (mapped_cell->type == ID($_NOT_)) {
 -				RTLIL::SigBit a_bit = mapped_cell->getPort(ID::A);
 -				RTLIL::SigBit y_bit = mapped_cell->getPort(ID::Y);
 -				bit_users[a_bit].insert(mapped_cell->name);
 -				bit_drivers[y_bit].insert(mapped_cell->name);
 -
 -				if (!a_bit.wire) {
 -					mapped_cell->setPort(ID::Y, module->addWire(NEW_ID));
 -					RTLIL::Wire *wire = module->wire(remap_name(y_bit.wire->name));
 -					log_assert(wire);
 -					module->connect(RTLIL::SigBit(wire, y_bit.offset), State::S1);
 -				}
 -				else if (!lut_costs.empty() || !lut_file.empty()) {
 -					RTLIL::Cell* driver_lut = nullptr;
 -					// ABC can return NOT gates that drive POs
 -					if (!a_bit.wire->port_input) {
 -						// If it's not a NOT gate that that comes from a PI directly,
 -						// find the driver LUT and clone that to guarantee that we won't
 -						// increase the max logic depth
 -						// (TODO: Optimise by not cloning unless will increase depth)
 -						RTLIL::IdString driver_name;
 -						if (GetSize(a_bit.wire) == 1)
 -							driver_name = stringf("%s$lut", a_bit.wire->name.c_str());
 -						else
 -							driver_name = stringf("%s[%d]$lut", a_bit.wire->name.c_str(), a_bit.offset);
 -						driver_lut = mapped_mod->cell(driver_name);
 -					}
 -
 -					if (!driver_lut) {
 -						// If a driver couldn't be found (could be from PI or box CI)
 -						// then implement using a LUT
 -						cell = module->addLut(remap_name(stringf("%s$lut", mapped_cell->name.c_str())),
 -								RTLIL::SigBit(module->wires_.at(remap_name(a_bit.wire->name)), a_bit.offset),
 -								RTLIL::SigBit(module->wires_.at(remap_name(y_bit.wire->name)), y_bit.offset),
 -								RTLIL::Const::from_string("01"));
 -						bit2sinks[cell->getPort(ID::A)].push_back(cell);
 -						cell_stats[ID($lut)]++;
 -					}
 -					else
 -						not2drivers[mapped_cell] = driver_lut;
 -					continue;
 -				}
 -				else
 -					log_abort();
 -				continue;
 -			}
 -			cell_stats[mapped_cell->type]++;
 -
 -			RTLIL::Cell *existing_cell = nullptr;
 -			if (mapped_cell->type.in(ID($lut), ID($__ABC9_FF_))) {
 -				if (mapped_cell->type == ID($lut) &&
 -						GetSize(mapped_cell->getPort(ID::A)) == 1 &&
 -						mapped_cell->getParam(ID(LUT)) == RTLIL::Const::from_string("01")) {
 -					SigSpec my_a = module->wires_.at(remap_name(mapped_cell->getPort(ID::A).as_wire()->name));
 -					SigSpec my_y = module->wires_.at(remap_name(mapped_cell->getPort(ID::Y).as_wire()->name));
 -					module->connect(my_y, my_a);
 -					log_abort();
 -					continue;
 -				}
 -				cell = module->addCell(remap_name(mapped_cell->name), mapped_cell->type);
 -			}
 -			else {
 -				existing_cell = module->cell(mapped_cell->name);
 -				log_assert(existing_cell);
 -				cell = module->addCell(remap_name(mapped_cell->name), mapped_cell->type);
 -			}
 -
 -			if (existing_cell) {
 -				cell->parameters = existing_cell->parameters;
 -				cell->attributes = existing_cell->attributes;
 -			}
 -			else {
 -				cell->parameters = mapped_cell->parameters;
 -				cell->attributes = mapped_cell->attributes;
 -			}
 -
 -			RTLIL::Module* box_module = design->module(mapped_cell->type);
 -			auto abc9_flop = box_module && box_module->get_bool_attribute("\\abc9_flop");
 -			for (auto &conn : mapped_cell->connections()) {
 -				RTLIL::SigSpec newsig;
 -				for (auto c : conn.second.chunks()) {
 -					if (c.width == 0)
 -						continue;
 -					//log_assert(c.width == 1);
 -					if (c.wire)
 -						c.wire = module->wires_.at(remap_name(c.wire->name));
 -					newsig.append(c);
 -				}
 -				cell->setPort(conn.first, newsig);
 -
 -				if (!abc9_flop) {
 -					if (cell->input(conn.first)) {
 -						for (auto i : newsig)
 -							bit2sinks[i].push_back(cell);
 -						for (auto i : conn.second)
 -							bit_users[i].insert(mapped_cell->name);
 -					}
 -					if (cell->output(conn.first))
 -						for (auto i : conn.second)
 -							bit_drivers[i].insert(mapped_cell->name);
 -				}
 -			}
 -		}
 -
 -		for (auto existing_cell : boxes) {
 -			Cell *cell = module->cell(remap_name(existing_cell->name));
 -			if (cell) {
 -				for (auto &conn : existing_cell->connections()) {
 -					if (!conn.second.is_wire())
 -						continue;
 -					Wire *wire = conn.second.as_wire();
 -					if (!wire->get_bool_attribute(ID(abc9_padding)))
 -						continue;
 -					cell->unsetPort(conn.first);
 -					log_debug("Dropping padded port connection for %s (%s) .%s (%s )\n", log_id(cell), cell->type.c_str(), log_id(conn.first), log_signal(conn.second));
 -				}
 -				module->swap_names(cell, existing_cell);
 -			}
 -			module->remove(existing_cell);
 -		}
 -
 -		// Copy connections (and rename) from mapped_mod to module
 -		for (auto conn : mapped_mod->connections()) {
 -			if (!conn.first.is_fully_const()) {
 -				auto chunks = conn.first.chunks();
 -				for (auto &c : chunks)
 -					c.wire = module->wires_.at(remap_name(c.wire->name));
 -				conn.first = std::move(chunks);
 -			}
 -			if (!conn.second.is_fully_const()) {
 -				auto chunks = conn.second.chunks();
 -				for (auto &c : chunks)
 -					if (c.wire)
 -						c.wire = module->wires_.at(remap_name(c.wire->name));
 -				conn.second = std::move(chunks);
 -			}
 -			module->connect(conn);
 -		}
 -
 -		for (auto &it : cell_stats)
 -			log("ABC RESULTS:   %15s cells: %8d\n", it.first.c_str(), it.second);
 -		int in_wires = 0, out_wires = 0;
 -
 -		// Stitch in mapped_mod's inputs/outputs into module
 -		for (auto port : mapped_mod->ports) {
 -			RTLIL::Wire *w = mapped_mod->wire(port);
 -			RTLIL::Wire *wire = module->wire(port);
 -			log_assert(wire);
 -			RTLIL::Wire *remap_wire = module->wire(remap_name(port));
 -			RTLIL::SigSpec signal = RTLIL::SigSpec(wire, 0, GetSize(remap_wire));
 -			log_assert(GetSize(signal) >= GetSize(remap_wire));
 -
 -			RTLIL::SigSig conn;
 -			if (w->port_output) {
 -				conn.first = signal;
 -				conn.second = remap_wire;
 -				out_wires++;
 -				module->connect(conn);
 -			}
 -			else if (w->port_input) {
 -				conn.first = remap_wire;
 -				conn.second = signal;
 -				in_wires++;
 -				module->connect(conn);
 -			}
 -		}
 -
 -		for (auto &it : bit_users)
 -			if (bit_drivers.count(it.first))
 -				for (auto driver_cell : bit_drivers.at(it.first))
 -				for (auto user_cell : it.second)
 -					toposort.edge(driver_cell, user_cell);
 -		bool no_loops YS_ATTRIBUTE(unused) = toposort.sort();
 -		log_assert(no_loops);
 -
 -		for (auto ii = toposort.sorted.rbegin(); ii != toposort.sorted.rend(); ii++) {
 -			RTLIL::Cell *not_cell = mapped_mod->cell(*ii);
 -			log_assert(not_cell);
 -			if (not_cell->type != ID($_NOT_))
 -				continue;
 -			auto it = not2drivers.find(not_cell);
 -			if (it == not2drivers.end())
 -				continue;
 -			RTLIL::Cell *driver_lut = it->second;
 -			RTLIL::SigBit a_bit = not_cell->getPort(ID::A);
 -			RTLIL::SigBit y_bit = not_cell->getPort(ID::Y);
 -			RTLIL::Const driver_mask;
 -
 -			a_bit.wire = module->wires_.at(remap_name(a_bit.wire->name));
 -			y_bit.wire = module->wires_.at(remap_name(y_bit.wire->name));
 -
 -			auto jt = bit2sinks.find(a_bit);
 -			if (jt == bit2sinks.end())
 -				goto clone_lut;
 -
 -			for (auto sink_cell : jt->second)
 -				if (sink_cell->type != ID($lut))
 -					goto clone_lut;
 -
 -			// Push downstream LUTs past inverter
 -			for (auto sink_cell : jt->second) {
 -				SigSpec A = sink_cell->getPort(ID::A);
 -				RTLIL::Const mask = sink_cell->getParam(ID(LUT));
 -				int index = 0;
 -				for (; index < GetSize(A); index++)
 -					if (A[index] == a_bit)
 -						break;
 -				log_assert(index < GetSize(A));
 -				int i = 0;
 -				while (i < GetSize(mask)) {
 -					for (int j = 0; j < (1 << index); j++)
 -						std::swap(mask[i+j], mask[i+j+(1 << index)]);
 -					i += 1 << (index+1);
 -				}
 -				A[index] = y_bit;
 -				sink_cell->setPort(ID::A, A);
 -				sink_cell->setParam(ID(LUT), mask);
 -			}
 -
 -			// Since we have rewritten all sinks (which we know
 -			// to be only LUTs) to be after the inverter, we can
 -			// go ahead and clone the LUT with the expectation
 -			// that the original driving LUT will become dangling
 -			// and get cleaned away
 -clone_lut:
 -			driver_mask = driver_lut->getParam(ID(LUT));
 -			for (auto &b : driver_mask.bits) {
 -				if (b == RTLIL::State::S0) b = RTLIL::State::S1;
 -				else if (b == RTLIL::State::S1) b = RTLIL::State::S0;
 -			}
 -			auto cell = module->addLut(NEW_ID,
 -					driver_lut->getPort(ID::A),
 -					y_bit,
 -					driver_mask);
 -			for (auto &bit : cell->connections_.at(ID::A)) {
 -				bit.wire = module->wires_.at(remap_name(bit.wire->name));
 -				bit2sinks[bit].push_back(cell);
 -			}
 -		}
 -
 -		// Now 'unexpose' those wires by undoing
 -		// the expose operation -- remove them from PO/PI
 -		// and re-connecting them back together
 -		for (auto wire : module->wires()) {
 -			auto it = wire->attributes.find(ID(abc9_scc_break));
 -			if (it != wire->attributes.end()) {
 -				wire->attributes.erase(it);
 -				log_assert(wire->port_output);
 -				wire->port_output = false;
 -				std::string name = wire->name.str();
 -				RTLIL::Wire *i_wire = module->wire(name.substr(0, GetSize(name) - 5));
 -				log_assert(i_wire);
 -				log_assert(i_wire->port_input);
 -				i_wire->port_input = false;
 -				module->connect(i_wire, wire);
 -			}
 -		}
 -		module->fixup_ports();
 -
 -		//log("ABC RESULTS:        internal signals: %8d\n", int(signal_list.size()) - in_wires - out_wires);
 -		log("ABC RESULTS:           input signals: %8d\n", in_wires);
 -		log("ABC RESULTS:          output signals: %8d\n", out_wires);
 -
 -		design->remove(mapped_mod);
 -	}
 -	else
 -	{
 -		log("Don't call ABC as there is nothing to map.\n");
 -	}
 -
 -	if (cleanup)
 -	{
 -		log("Removing temp directory.\n");
 -		remove_directory(tempdir_name);
 -	}
 -
 -	log_pop();
 -}
 -
 -struct Abc9Pass : public Pass {
 -	Abc9Pass() : Pass("abc9", "use ABC9 for technology mapping") { }
 +	Abc9Pass() : ScriptPass("abc9", "use ABC9 for technology mapping") { }
- 
+ 	void on_register() YS_OVERRIDE
+ 	{
+ 		RTLIL::constpad["abc9.script.default"] = "+&scorr; &sweep; &dc2; &dch -f; &ps; &if {C} {W} {D} {R} -v; &mfs";
+ 		RTLIL::constpad["abc9.script.default.area"] = "+&scorr; &sweep; &dc2; &dch -f; &ps; &if {C} {W} {D} {R} -a -v; &mfs";
+ 		RTLIL::constpad["abc9.script.default.fast"] = "+&if {C} {W} {D} {R} -v";
+ 		// Based on ABC's &flow
+ 		RTLIL::constpad["abc9.script.flow"] = "+&scorr; &sweep;" \
+ 			"&dch -C 500;" \
+ 			/* Round 1 */ \
+ 			/* Map 1 */ "&unmap; &if {C} {W} {D} {R} -v; &save; &load; &mfs;" \
+ 			"&st; &dsdb;" \
+ 			/* Map 2 */ "&unmap; &if {C} {W} {D} {R} -v; &save; &load; &mfs;" \
+ 			"&st; &syn2 -m -R 10; &dsdb;" \
+ 			"&blut -a -K 6;" \
+ 			/* Map 3 */ "&unmap; &if {C} {W} {D} {R} -v; &save; &load; &mfs;" \
+ 			/* Round 2 */ \
+ 			"&st; &sopb;" \
+ 			/* Map 1 */ "&unmap; &if {C} {W} {D} {R} -v; &save; &load; &mfs;" \
+ 			"&st; &dsdb;" \
+ 			/* Map 2 */ "&unmap; &if {C} {W} {D} {R} -v; &save; &load; &mfs;" \
+ 			"&st; &syn2 -m -R 10; &dsdb;" \
+ 			"&blut -a -K 6;" \
+ 			/* Map 3 */ "&unmap; &if {C} {W} {D} {R} -v; &save; &load; &mfs;" \
+ 			/* Round 3 */ \
+ 			/* Map 1 */ "&unmap; &if {C} {W} {D} {R} -v; &save; &load; &mfs;" \
+ 			"&st; &dsdb;" \
+ 			/* Map 2 */ "&unmap; &if {C} {W} {D} {R} -v; &save; &load; &mfs;" \
+ 			"&st; &syn2 -m -R 10; &dsdb;" \
+ 			"&blut -a -K 6;" \
+ 			/* Map 3 */ "&unmap; &if {C} {W} {D} {R} -v; &save; &load; &mfs;";
+ 		// Based on ABC's &flow2
+ 		RTLIL::constpad["abc9.script.flow2"] = "+&scorr; &sweep;" \
+ 			/* Comm1 */ "&synch2 -K 6 -C 500; &if -m {C} {W} {D} {R} -v; &mfs "/*"-W 4 -M 500 -C 7000"*/"; &save;"\
+ 			/* Comm2 */ "&dch -C 500; &if -m {C} {W} {D} {R} -v; &mfs "/*"-W 4 -M 500 -C 7000"*/"; &save;"\
+ 			"&load; &st; &sopb -R 10 -C 4; " \
+ 			/* Comm3 */ "&synch2 -K 6 -C 500; &if -m "/*"-E 5"*/" {C} {W} {D} {R} -v; &mfs "/*"-W 4 -M 500 -C 7000"*/"; &save;"\
+ 			/* Comm2 */ "&dch -C 500; &if -m {C} {W} {D} {R} -v; &mfs "/*"-W 4 -M 500 -C 7000"*/"; &save; "\
+ 			"&load";
+ 		// Based on ABC's &flow3
+ 		RTLIL::constpad["abc9.script.flow3"] = "+&scorr; &sweep;" \
+ 			"&if {C} {W} {D}; &save; &st; &syn2; &if {C} {W} {D} {R} -v; &save; &load;"\
+ 			"&st; &if {C} -g -K 6; &dch -f; &if {C} {W} {D} {R} -v; &save; &load;"\
+ 			"&st; &if {C} -g -K 6; &synch2; &if {C} {W} {D} {R} -v; &save; &load;"\
+ 			"&mfs";
+ 	}
  	void help() YS_OVERRIDE
  	{
  		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
@@@ -57,14 -802,16 +108,12 @@@
  		log("        replaced with blanks before the string is passed to ABC.\n");
  		log("\n");
  		log("        if no -script parameter is given, the following scripts are used:\n");
- 		//FIXME:
- 		//log("%s\n", fold_abc9_cmd(ABC_COMMAND_LUT).c_str());
 -		log("\n");
 -		log("        for -lut/-luts:\n");
+ 		log("%s\n", fold_abc9_cmd(RTLIL::constpad.at("abc9.script.default").substr(1,std::string::npos)).c_str());
  		log("\n");
  		log("    -fast\n");
  		log("        use different default scripts that are slightly faster (at the cost\n");
  		log("        of output quality):\n");
- 		//FIXME:
- 		//log("%s\n", fold_abc9_cmd(ABC_FAST_COMMAND_LUT).c_str());
 -		log("\n");
 -		log("        for -lut/-luts:\n");
+ 		log("%s\n", fold_abc9_cmd(RTLIL::constpad.at("abc9.script.default.fast").substr(1,std::string::npos)).c_str());
  		log("\n");
  		log("    -D <picoseconds>\n");
  		log("        set delay target. the string {D} in the default scripts above is\n");
@@@ -104,7 -851,7 +153,7 @@@
  		log("        command output is identical across runs.\n");
  		log("\n");
  		log("    -box <file>\n");
--		log("        pass this file with box library to ABC. Use with -lut.\n");
++		log("        pass this file with box library to ABC.\n");
  		log("\n");
  		log("Note that this is a logic optimization pass within Yosys that is calling ABC\n");
  		log("internally. This is not going to \"run ABC on your design\". It will instead run\n");
@@@ -115,48 -862,96 +164,53 @@@
  		log("\n");
  		log("[1] http://www.eecs.berkeley.edu/~alanmi/abc/\n");
  		log("\n");
 +		help_script();
 +		log("\n");
  	}
 -	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
 -	{
 -		log_header(design, "Executing ABC9 pass (technology mapping using ABC9).\n");
 -		log_push();
  
 -#ifdef ABCEXTERNAL
 -		std::string exe_file = ABCEXTERNAL;
 -#else
 -		std::string exe_file = proc_self_dirname() + "yosys-abc";
 -#endif
 -		std::string script_file, clk_str, box_file, lut_file;
 -		std::string delay_target, lutin_shared = "-S 1", wire_delay;
 -		bool fast_mode = false, dff_mode = false, cleanup = true;
 -		bool show_tempdir = false;
 -		vector<int> lut_costs;
 +	std::stringstream exe_cmd;
 +	bool dff_mode, cleanup;
  
 -#if 0
 -		cleanup = false;
 -		show_tempdir = true;
 -#endif
 +	void clear_flags() YS_OVERRIDE
 +	{
 +		exe_cmd.str("");
 +		exe_cmd << "abc9_exe";
 +		dff_mode = false;
 +		cleanup = true;
 +	}
  
 -#ifdef _WIN32
 -#ifndef ABCEXTERNAL
 -		if (!check_file_exists(exe_file + ".exe") && check_file_exists(proc_self_dirname() + "..\\yosys-abc.exe"))
 -			exe_file = proc_self_dirname() + "..\\yosys-abc";
 -#endif
 -#endif
 +	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
 +	{
 +		std::string run_from, run_to;
 +		clear_flags();
  
  		// get arguments from scratchpad first, then override by command arguments
 -		std::string lut_arg, luts_arg;
 -		exe_file = design->scratchpad_get_string("abc9.exe", exe_file /* inherit default value if not set */);
 -		script_file = design->scratchpad_get_string("abc9.script", script_file);
 -		if (design->scratchpad.count("abc9.D")) {
 -			delay_target = "-D " + design->scratchpad_get_string("abc9.D");
 -		}
 -		lut_arg = design->scratchpad_get_string("abc9.lut", lut_arg);
 -		luts_arg = design->scratchpad_get_string("abc9.luts", luts_arg);
 -		fast_mode = design->scratchpad_get_bool("abc9.fast", fast_mode);
  		dff_mode = design->scratchpad_get_bool("abc9.dff", dff_mode);
  		cleanup = !design->scratchpad_get_bool("abc9.nocleanup", !cleanup);
 -		show_tempdir = design->scratchpad_get_bool("abc9.showtmp", show_tempdir);
 -		box_file = design->scratchpad_get_string("abc9.box", box_file);
 -		if (design->scratchpad.count("abc9.W")) {
 -			wire_delay = "-W " + design->scratchpad_get_string("abc9.W");
 -		}
  
+ 		if (design->scratchpad_get_bool("abc9.debug")) {
+ 			cleanup = false;
 -			show_tempdir = true;
++			exe_cmd << " -showtmp";
+ 		}
+ 
  		size_t argidx;
 -		char pwd [PATH_MAX];
 -		if (!getcwd(pwd, sizeof(pwd))) {
 -			log_cmd_error("getcwd failed: %s\n", strerror(errno));
 -			log_abort();
 -		}
  		for (argidx = 1; argidx < args.size(); argidx++) {
  			std::string arg = args[argidx];
 -			if (arg == "-exe" && argidx+1 < args.size()) {
 -				exe_file = args[++argidx];
 -				continue;
 -			}
 -			if (arg == "-script" && argidx+1 < args.size()) {
 -				script_file = args[++argidx];
 -				continue;
 -			}
 -			if (arg == "-D" && argidx+1 < args.size()) {
 -				delay_target = "-D " + args[++argidx];
 -				continue;
 -			}
 -			//if (arg == "-S" && argidx+1 < args.size()) {
 -			//	lutin_shared = "-S " + args[++argidx];
 -			//	continue;
 -			//}
 -			if (arg == "-lut" && argidx+1 < args.size()) {
 -				lut_arg = args[++argidx];
 +			if ((arg == "-exe" || arg == "-script" || arg == "-D" ||
 +						/* arg == "-S" || */ arg == "-lut" || arg == "-luts" ||
 +						arg == "-box" || arg == "-W") &&
 +					argidx+1 < args.size()) {
 +				exe_cmd << " " << arg << " " << args[++argidx];
  				continue;
  			}
 -			if (arg == "-luts" && argidx+1 < args.size()) {
 -				luts_arg = args[++argidx];
 -				continue;
 -			}
 -			if (arg == "-fast") {
 -				fast_mode = true;
 +			if (arg == "-fast" || /* arg == "-dff" || */
- 					/* arg == "-nocleanup" || */ arg == "-showtmp" ||
- 					arg == "-nomfs") {
++					/* arg == "-nocleanup" || */ arg == "-showtmp") {
 +				exe_cmd << " " << arg;
  				continue;
  			}
  			if (arg == "-dff") {
  				dff_mode = true;
++                exe_cmd << " " << arg;
  				continue;
  			}
  			if (arg == "-nocleanup") {
diff --cc passes/techmap/abc9_exe.cc
index 3108765a1,000000000..c1687ef97
mode 100644,000000..100644
--- a/passes/techmap/abc9_exe.cc
+++ b/passes/techmap/abc9_exe.cc
@@@ -1,539 -1,0 +1,535 @@@
 +/*
 + *  yosys -- Yosys Open SYnthesis Suite
 + *
 + *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
 + *                2019  Eddie Hung <eddie@fpgeh.com>
 + *
 + *  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.
 + *
 + */
 +
 +// [[CITE]] ABC
 +// Berkeley Logic Synthesis and Verification Group, ABC: A System for Sequential Synthesis and Verification
 +// http://www.eecs.berkeley.edu/~alanmi/abc/
 +
- #if 0
- // Based on &flow3 - better QoR but more experimental
- #define ABC_COMMAND_LUT "&st; &ps -l; &sweep -v; &scorr; " \
- 						"&st; &if {W}; &save; &st; &syn2; &if {W} -v; &save; &load; "\
- 						"&st; &if -g -K 6; &dch -f; &if {W} -v; &save; &load; "\
- 						"&st; &if -g -K 6; &synch2; &if {W} -v; &save; &load; "\
- 						"&mfs; &ps -l"
- #else
- #define ABC_COMMAND_LUT "&st; &scorr; &sweep; &dc2; &st; &dch -f; &ps; &if {W} {D} -v; &mfs; &ps -l"
- #endif
- 
- 
- #define ABC_FAST_COMMAND_LUT "&st; &if {W} {D}"
- 
 +#include "kernel/register.h"
 +#include "kernel/log.h"
 +
 +#ifndef _WIN32
 +#  include <unistd.h>
 +#  include <dirent.h>
 +#endif
 +
 +#ifdef YOSYS_LINK_ABC
 +extern "C" int Abc_RealMain(int argc, char *argv[]);
 +#endif
 +
++std::string fold_abc9_cmd(std::string str)
++{
++	std::string token, new_str = "          ";
++	int char_counter = 10;
++
++	for (size_t i = 0; i <= str.size(); i++) {
++		if (i < str.size())
++			token += str[i];
++		if (i == str.size() || str[i] == ';') {
++			if (char_counter + token.size() > 75)
++				new_str += "\n              ", char_counter = 14;
++			new_str += token, char_counter += token.size();
++			token.clear();
++		}
++	}
++
++	return new_str;
++}
++
 +USING_YOSYS_NAMESPACE
 +PRIVATE_NAMESPACE_BEGIN
 +
 +std::string add_echos_to_abc9_cmd(std::string str)
 +{
 +	std::string new_str, token;
 +	for (size_t i = 0; i < str.size(); i++) {
 +		token += str[i];
 +		if (str[i] == ';') {
 +			while (i+1 < str.size() && str[i+1] == ' ')
 +				i++;
 +			new_str += "echo + " + token + " " + token + " ";
 +			token.clear();
 +		}
 +	}
 +
 +	if (!token.empty()) {
 +		if (!new_str.empty())
 +			new_str += "echo + " + token + "; ";
 +		new_str += token;
 +	}
 +
 +	return new_str;
 +}
 +
- std::string fold_abc9_cmd(std::string str)
- {
- 	std::string token, new_str = "          ";
- 	int char_counter = 10;
- 
- 	for (size_t i = 0; i <= str.size(); i++) {
- 		if (i < str.size())
- 			token += str[i];
- 		if (i == str.size() || str[i] == ';') {
- 			if (char_counter + token.size() > 75)
- 				new_str += "\n              ", char_counter = 14;
- 			new_str += token, char_counter += token.size();
- 			token.clear();
- 		}
- 	}
- 
- 	return new_str;
- }
- 
 +std::string replace_tempdir(std::string text, std::string tempdir_name, bool show_tempdir)
 +{
 +	if (show_tempdir)
 +		return text;
 +
 +	while (1) {
 +		size_t pos = text.find(tempdir_name);
 +		if (pos == std::string::npos)
 +			break;
 +		text = text.substr(0, pos) + "<abc-temp-dir>" + text.substr(pos + GetSize(tempdir_name));
 +	}
 +
 +	std::string  selfdir_name = proc_self_dirname();
 +	if (selfdir_name != "/") {
 +		while (1) {
 +			size_t pos = text.find(selfdir_name);
 +			if (pos == std::string::npos)
 +				break;
 +			text = text.substr(0, pos) + "<yosys-exe-dir>/" + text.substr(pos + GetSize(selfdir_name));
 +		}
 +	}
 +
 +	return text;
 +}
 +
 +struct abc9_output_filter
 +{
 +	bool got_cr;
 +	int escape_seq_state;
 +	std::string linebuf;
 +	std::string tempdir_name;
 +	bool show_tempdir;
 +
 +	abc9_output_filter(std::string tempdir_name, bool show_tempdir) : tempdir_name(tempdir_name), show_tempdir(show_tempdir)
 +	{
 +		got_cr = false;
 +		escape_seq_state = 0;
 +	}
 +
 +	void next_char(char ch)
 +	{
 +		if (escape_seq_state == 0 && ch == '\033') {
 +			escape_seq_state = 1;
 +			return;
 +		}
 +		if (escape_seq_state == 1) {
 +			escape_seq_state = ch == '[' ? 2 : 0;
 +			return;
 +		}
 +		if (escape_seq_state == 2) {
 +			if ((ch < '0' || '9' < ch) && ch != ';')
 +				escape_seq_state = 0;
 +			return;
 +		}
 +		escape_seq_state = 0;
 +		if (ch == '\r') {
 +			got_cr = true;
 +			return;
 +		}
 +		if (ch == '\n') {
 +			log("ABC: %s\n", replace_tempdir(linebuf, tempdir_name, show_tempdir).c_str());
 +			got_cr = false, linebuf.clear();
 +			return;
 +		}
 +		if (got_cr)
 +			got_cr = false, linebuf.clear();
 +		linebuf += ch;
 +	}
 +
 +	void next_line(const std::string &line)
 +	{
 +		//int pi, po;
 +		//if (sscanf(line.c_str(), "Start-point = pi%d.  End-point = po%d.", &pi, &po) == 2) {
 +		//	log("ABC: Start-point = pi%d (%s).  End-point = po%d (%s).\n",
 +		//			pi, pi_map.count(pi) ? pi_map.at(pi).c_str() : "???",
 +		//			po, po_map.count(po) ? po_map.at(po).c_str() : "???");
 +		//	return;
 +		//}
 +
 +		for (char ch : line)
 +			next_char(ch);
 +	}
 +};
 +
 +void abc9_module(RTLIL::Design *design, std::string script_file, std::string exe_file,
- 		vector<int> lut_costs, std::string delay_target, std::string /*lutin_shared*/, bool fast_mode,
++		vector<int> lut_costs, bool dff_mode, std::string delay_target, std::string /*lutin_shared*/, bool fast_mode,
 +		bool show_tempdir, std::string box_file, std::string lut_file,
- 		std::string wire_delay, bool nomfs, std::string tempdir_name
++		std::string wire_delay, std::string tempdir_name
 +)
 +{
 +	//FIXME:
 +	//log_header(design, "Extracting gate netlist of module `%s' to `%s/input.xaig'..\n",
 +	//		module->name.c_str(), replace_tempdir(tempdir_name, tempdir_name, show_tempdir).c_str());
 +
 +	std::string abc9_script;
 +
- 	if (!lut_costs.empty()) {
++	if (!lut_costs.empty())
 +		abc9_script += stringf("read_lut %s/lutdefs.txt; ", tempdir_name.c_str());
- 		if (!box_file.empty())
- 			abc9_script += stringf("read_box %s; ", box_file.c_str());
- 	}
- 	else
- 	if (!lut_file.empty()) {
++	else if (!lut_file.empty())
 +		abc9_script += stringf("read_lut %s; ", lut_file.c_str());
- 		if (!box_file.empty())
- 			abc9_script += stringf("read_box %s; ", box_file.c_str());
- 	}
 +	else
 +		log_abort();
 +
++	log_assert(!box_file.empty());
++	abc9_script += stringf("read_box %s; ", box_file.c_str());
 +	abc9_script += stringf("&read %s/input.xaig; &ps; ", tempdir_name.c_str());
 +
 +	if (!script_file.empty()) {
 +		if (script_file[0] == '+') {
 +			for (size_t i = 1; i < script_file.size(); i++)
 +				if (script_file[i] == '\'')
 +					abc9_script += "'\\''";
 +				else if (script_file[i] == ',')
 +					abc9_script += " ";
 +				else
 +					abc9_script += script_file[i];
 +		} else
 +			abc9_script += stringf("source %s", script_file.c_str());
 +	} else if (!lut_costs.empty() || !lut_file.empty()) {
- 		abc9_script += fast_mode ? ABC_FAST_COMMAND_LUT : ABC_COMMAND_LUT;
++		abc9_script += fast_mode ? RTLIL::constpad.at("abc9.script.default.fast").substr(1,std::string::npos)
++			: RTLIL::constpad.at("abc9.script.default").substr(1,std::string::npos);
 +	} else
 +		log_abort();
 +
 +	for (size_t pos = abc9_script.find("{D}"); pos != std::string::npos; pos = abc9_script.find("{D}", pos))
 +		abc9_script = abc9_script.substr(0, pos) + delay_target + abc9_script.substr(pos+3);
 +
 +	//for (size_t pos = abc9_script.find("{S}"); pos != std::string::npos; pos = abc9_script.find("{S}", pos))
 +	//	abc9_script = abc9_script.substr(0, pos) + lutin_shared + abc9_script.substr(pos+3);
 +
 +	for (size_t pos = abc9_script.find("{W}"); pos != std::string::npos; pos = abc9_script.find("{W}", pos))
 +		abc9_script = abc9_script.substr(0, pos) + wire_delay + abc9_script.substr(pos+3);
 +
- 	if (nomfs)
- 		for (size_t pos = abc9_script.find("&mfs"); pos != std::string::npos; pos = abc9_script.find("&mfs", pos))
- 			abc9_script = abc9_script.erase(pos, strlen("&mfs"));
- 
- 	abc9_script += stringf("; &write -n %s/output.aig", tempdir_name.c_str());
++	std::string C;
++	if (design->scratchpad.count("abc9.if.C"))
++		C = "-C " + design->scratchpad_get_string("abc9.if.C");
++	for (size_t pos = abc9_script.find("{C}"); pos != std::string::npos; pos = abc9_script.find("{C}", pos))
++		abc9_script = abc9_script.substr(0, pos) + C + abc9_script.substr(pos+3);
++
++	std::string R;
++	if (design->scratchpad.count("abc9.if.R"))
++		R = "-R " + design->scratchpad_get_string("abc9.if.R");
++	for (size_t pos = abc9_script.find("{R}"); pos != std::string::npos; pos = abc9_script.find("{R}", pos))
++		abc9_script = abc9_script.substr(0, pos) + R + abc9_script.substr(pos+3);
++
++	abc9_script += stringf("; &ps -l; &write -n %s/output.aig;", tempdir_name.c_str());
++	if (design->scratchpad_get_bool("abc9.verify")) {
++		if (dff_mode)
++			abc9_script += "verify -s;";
++		else
++			abc9_script += "verify;";
++	}
++	abc9_script += "time";
 +	abc9_script = add_echos_to_abc9_cmd(abc9_script);
 +
 +	for (size_t i = 0; i+1 < abc9_script.size(); i++)
 +		if (abc9_script[i] == ';' && abc9_script[i+1] == ' ')
 +			abc9_script[i+1] = '\n';
 +
 +	FILE *f = fopen(stringf("%s/abc.script", tempdir_name.c_str()).c_str(), "wt");
 +	fprintf(f, "%s\n", abc9_script.c_str());
 +	fclose(f);
 +
 +	std::string buffer;
 +
 +	log_header(design, "Executing ABC9.\n");
 +
 +	if (!lut_costs.empty()) {
 +		buffer = stringf("%s/lutdefs.txt", tempdir_name.c_str());
 +		f = fopen(buffer.c_str(), "wt");
 +		if (f == NULL)
 +			log_error("Opening %s for writing failed: %s\n", buffer.c_str(), strerror(errno));
 +		for (int i = 0; i < GetSize(lut_costs); i++)
 +			fprintf(f, "%d %d.00 1.00\n", i+1, lut_costs.at(i));
 +		fclose(f);
 +	}
 +
 +	buffer = stringf("%s -s -f %s/abc.script 2>&1", exe_file.c_str(), tempdir_name.c_str());
 +	log("Running ABC command: %s\n", replace_tempdir(buffer, tempdir_name, show_tempdir).c_str());
 +
 +#ifndef YOSYS_LINK_ABC
 +	abc9_output_filter filt(tempdir_name, show_tempdir);
 +	int ret = run_command(buffer, std::bind(&abc9_output_filter::next_line, filt, std::placeholders::_1));
 +#else
 +	// These needs to be mutable, supposedly due to getopt
 +	char *abc9_argv[5];
 +	string tmp_script_name = stringf("%s/abc.script", tempdir_name.c_str());
 +	abc9_argv[0] = strdup(exe_file.c_str());
 +	abc9_argv[1] = strdup("-s");
 +	abc9_argv[2] = strdup("-f");
 +	abc9_argv[3] = strdup(tmp_script_name.c_str());
 +	abc9_argv[4] = 0;
 +	int ret = Abc_RealMain(4, abc9_argv);
 +	free(abc9_argv[0]);
 +	free(abc9_argv[1]);
 +	free(abc9_argv[2]);
 +	free(abc9_argv[3]);
 +#endif
 +	if (ret != 0)
 +		log_error("ABC: execution of command \"%s\" failed: return code %d.\n", buffer.c_str(), ret);
 +}
 +
 +struct Abc9ExePass : public Pass {
 +	Abc9ExePass() : Pass("abc9_exe", "use ABC9 for technology mapping") { }
 +	void help() YS_OVERRIDE
 +	{
 +		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
 +		log("\n");
 +		log("    abc9_exe [options]\n");
 +		log("\n");
 +		log(" \n");
 +		log("This pass uses the ABC tool [1] for technology mapping of the top module\n");
 +		log("(according to the (* top *) attribute or if only one module is currently selected)\n");
 +		log("to a target FPGA architecture.\n");
 +		log("\n");
 +		log("    -exe <command>\n");
 +#ifdef ABCEXTERNAL
 +		log("        use the specified command instead of \"" ABCEXTERNAL "\" to execute ABC.\n");
 +#else
 +		log("        use the specified command instead of \"<yosys-bindir>/yosys-abc\" to execute ABC.\n");
 +#endif
 +		log("        This can e.g. be used to call a specific version of ABC or a wrapper.\n");
 +		log("\n");
 +		log("    -script <file>\n");
 +		log("        use the specified ABC script file instead of the default script.\n");
 +		log("\n");
 +		log("        if <file> starts with a plus sign (+), then the rest of the filename\n");
 +		log("        string is interpreted as the command string to be passed to ABC. The\n");
 +		log("        leading plus sign is removed and all commas (,) in the string are\n");
 +		log("        replaced with blanks before the string is passed to ABC.\n");
 +		log("\n");
 +		log("        if no -script parameter is given, the following scripts are used:\n");
- 		log("%s\n", fold_abc9_cmd(ABC_COMMAND_LUT).c_str());
++		log("%s\n", fold_abc9_cmd(RTLIL::constpad.at("abc9.script.default").substr(1,std::string::npos)).c_str());
 +		log("\n");
 +		log("    -fast\n");
 +		log("        use different default scripts that are slightly faster (at the cost\n");
 +		log("        of output quality):\n");
- 		log("%s\n", fold_abc9_cmd(ABC_FAST_COMMAND_LUT).c_str());
++		log("%s\n", fold_abc9_cmd(RTLIL::constpad.at("abc9.script.default.fast").substr(1,std::string::npos)).c_str());
 +		log("\n");
 +		log("    -D <picoseconds>\n");
 +		log("        set delay target. the string {D} in the default scripts above is\n");
 +		log("        replaced by this option when used, and an empty string otherwise\n");
 +		log("        (indicating best possible delay).\n");
 +		log("\n");
 +//		log("    -S <num>\n");
 +//		log("        maximum number of LUT inputs shared.\n");
 +//		log("        (replaces {S} in the default scripts above, default: -S 1)\n");
 +//		log("\n");
 +		log("    -lut <width>\n");
 +		log("        generate netlist using luts of (max) the specified width.\n");
 +		log("\n");
 +		log("    -lut <w1>:<w2>\n");
 +		log("        generate netlist using luts of (max) the specified width <w2>. All\n");
 +		log("        luts with width <= <w1> have constant cost. for luts larger than <w1>\n");
 +		log("        the area cost doubles with each additional input bit. the delay cost\n");
 +		log("        is still constant for all lut widths.\n");
 +		log("\n");
 +		log("    -lut <file>\n");
 +		log("        pass this file with lut library to ABC.\n");
 +		log("\n");
 +		log("    -luts <cost1>,<cost2>,<cost3>,<sizeN>:<cost4-N>,..\n");
 +		log("        generate netlist using luts. Use the specified costs for luts with 1,\n");
 +		log("        2, 3, .. inputs.\n");
 +		log("\n");
 +		log("    -showtmp\n");
 +		log("        print the temp dir name in log. usually this is suppressed so that the\n");
 +		log("        command output is identical across runs.\n");
 +		log("\n");
 +		log("    -box <file>\n");
- 		log("        pass this file with box library to ABC. Use with -lut.\n");
++		log("        pass this file with box library to ABC.\n");
 +		log("\n");
 +		log("    -cwd <dir>\n");
 +		log("        use this as the current working directory, inside which the 'input.xaig'\n");
 +		log("        file is expected. temporary files will be created in this directory, and\n");
 +		log("        the mapped result will be written to 'output.aig'.\n");
 +		log("\n");
 +		log("Note that this is a logic optimization pass within Yosys that is calling ABC\n");
 +		log("internally. This is not going to \"run ABC on your design\". It will instead run\n");
 +		log("ABC on logic snippets extracted from your design. You will not get any useful\n");
 +		log("output when passing an ABC script that writes a file. Instead write your full\n");
 +		log("design as BLIF file with write_blif and then load that into ABC externally if\n");
 +		log("you want to use ABC to convert your design into another format.\n");
 +		log("\n");
 +		log("[1] http://www.eecs.berkeley.edu/~alanmi/abc/\n");
 +		log("\n");
 +	}
 +	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
 +	{
 +		log_header(design, "Executing ABC9_MAP pass (technology mapping using ABC9).\n");
 +
 +#ifdef ABCEXTERNAL
 +		std::string exe_file = ABCEXTERNAL;
 +#else
 +		std::string exe_file = proc_self_dirname() + "yosys-abc";
 +#endif
 +		std::string script_file, clk_str, box_file, lut_file;
 +		std::string delay_target, lutin_shared = "-S 1", wire_delay;
 +		std::string tempdir_name;
- 		bool fast_mode = false;
++		bool fast_mode = false, dff_mode = false;
 +		bool show_tempdir = false;
- 		bool nomfs = false;
 +		vector<int> lut_costs;
 +
 +#if 0
 +		cleanup = false;
 +		show_tempdir = true;
 +#endif
 +
 +#ifdef _WIN32
 +#ifndef ABCEXTERNAL
 +		if (!check_file_exists(exe_file + ".exe") && check_file_exists(proc_self_dirname() + "..\\yosys-abc.exe"))
 +			exe_file = proc_self_dirname() + "..\\yosys-abc";
 +#endif
 +#endif
 +
 +		std::string lut_arg, luts_arg;
 +		exe_file = design->scratchpad_get_string("abc9.exe", exe_file /* inherit default value if not set */);
 +		script_file = design->scratchpad_get_string("abc9.script", script_file);
 +		if (design->scratchpad.count("abc9.D")) {
 +			delay_target = "-D " + design->scratchpad_get_string("abc9.D");
 +		}
 +		lut_arg = design->scratchpad_get_string("abc9.lut", lut_arg);
 +		luts_arg = design->scratchpad_get_string("abc9.luts", luts_arg);
 +		fast_mode = design->scratchpad_get_bool("abc9.fast", fast_mode);
++		dff_mode = design->scratchpad_get_bool("abc9.dff", dff_mode);
 +		show_tempdir = design->scratchpad_get_bool("abc9.showtmp", show_tempdir);
 +		box_file = design->scratchpad_get_string("abc9.box", box_file);
 +		if (design->scratchpad.count("abc9.W")) {
 +			wire_delay = "-W " + design->scratchpad_get_string("abc9.W");
 +		}
- 		nomfs = design->scratchpad_get_bool("abc9.nomfs", nomfs);
 +
 +		size_t argidx;
 +		char pwd [PATH_MAX];
 +		if (!getcwd(pwd, sizeof(pwd))) {
 +			log_cmd_error("getcwd failed: %s\n", strerror(errno));
 +			log_abort();
 +		}
 +		for (argidx = 1; argidx < args.size(); argidx++) {
 +			std::string arg = args[argidx];
 +			if (arg == "-exe" && argidx+1 < args.size()) {
 +				exe_file = args[++argidx];
 +				continue;
 +			}
 +			if (arg == "-script" && argidx+1 < args.size()) {
 +				script_file = args[++argidx];
 +				continue;
 +			}
 +			if (arg == "-D" && argidx+1 < args.size()) {
 +				delay_target = "-D " + args[++argidx];
 +				continue;
 +			}
 +			//if (arg == "-S" && argidx+1 < args.size()) {
 +			//	lutin_shared = "-S " + args[++argidx];
 +			//	continue;
 +			//}
 +			if (arg == "-lut" && argidx+1 < args.size()) {
 +				lut_arg = args[++argidx];
 +				continue;
 +			}
 +			if (arg == "-luts" && argidx+1 < args.size()) {
 +				lut_arg = args[++argidx];
 +				continue;
 +			}
 +			if (arg == "-fast") {
 +				fast_mode = true;
 +				continue;
 +			}
++			if (arg == "-dff") {
++				dff_mode = true;
++				continue;
++			}
 +			if (arg == "-showtmp") {
 +				show_tempdir = true;
 +				continue;
 +			}
 +			if (arg == "-box" && argidx+1 < args.size()) {
 +				box_file = args[++argidx];
 +				continue;
 +			}
 +			if (arg == "-W" && argidx+1 < args.size()) {
 +				wire_delay = "-W " + args[++argidx];
 +				continue;
 +			}
- 			if (arg == "-nomfs") {
- 				nomfs = true;
- 				continue;
- 			}
 +			if (arg == "-cwd" && argidx+1 < args.size()) {
 +				tempdir_name = args[++argidx];
 +				continue;
 +			}
 +			break;
 +		}
 +		extra_args(args, argidx, design);
 +
 +		rewrite_filename(script_file);
 +		if (!script_file.empty() && !is_absolute_path(script_file) && script_file[0] != '+')
 +			script_file = std::string(pwd) + "/" + script_file;
 +
 +		// handle -lut / -luts args
 +		if (!lut_arg.empty()) {
 +			string arg = lut_arg;
 +			if (arg.find_first_not_of("0123456789:") == std::string::npos) {
 +				size_t pos = arg.find_first_of(':');
 +				int lut_mode = 0, lut_mode2 = 0;
 +				if (pos != string::npos) {
 +					lut_mode = atoi(arg.substr(0, pos).c_str());
 +					lut_mode2 = atoi(arg.substr(pos+1).c_str());
 +				} else {
 +					lut_mode = atoi(arg.c_str());
 +					lut_mode2 = lut_mode;
 +				}
 +				lut_costs.clear();
 +				for (int i = 0; i < lut_mode; i++)
 +					lut_costs.push_back(1);
 +				for (int i = lut_mode; i < lut_mode2; i++)
 +					lut_costs.push_back(2 << (i - lut_mode));
 +			}
 +			else {
 +				lut_file = arg;
 +				rewrite_filename(lut_file);
 +				if (!lut_file.empty() && !is_absolute_path(lut_file) && lut_file[0] != '+')
 +					lut_file = std::string(pwd) + "/" + lut_file;
 +			}
 +		}
 +		if (!luts_arg.empty()) {
 +			lut_costs.clear();
 +			for (auto &tok : split_tokens(luts_arg, ",")) {
 +				auto parts = split_tokens(tok, ":");
 +				if (GetSize(parts) == 0 && !lut_costs.empty())
 +					lut_costs.push_back(lut_costs.back());
 +				else if (GetSize(parts) == 1)
 +					lut_costs.push_back(atoi(parts.at(0).c_str()));
 +				else if (GetSize(parts) == 2)
 +					while (GetSize(lut_costs) < atoi(parts.at(0).c_str()))
 +						lut_costs.push_back(atoi(parts.at(1).c_str()));
 +				else
 +					log_cmd_error("Invalid -luts syntax.\n");
 +			}
 +		}
 +
 +		// ABC expects a box file for XAIG
 +		if (box_file.empty())
 +			box_file = "+/dummy.box";
 +
 +		rewrite_filename(box_file);
 +		if (!box_file.empty() && !is_absolute_path(box_file) && box_file[0] != '+')
 +			box_file = std::string(pwd) + "/" + box_file;
 +
 +		if (tempdir_name.empty())
 +			log_cmd_error("abc9_exe '-cwd' option is mandatory.\n");
 +
 +
- 		abc9_module(design, script_file, exe_file, lut_costs,
++		abc9_module(design, script_file, exe_file, lut_costs, dff_mode,
 +				delay_target, lutin_shared, fast_mode, show_tempdir,
- 				box_file, lut_file, wire_delay, nomfs, tempdir_name);
++				box_file, lut_file, wire_delay, tempdir_name);
 +	}
 +} Abc9ExePass;
 +
 +PRIVATE_NAMESPACE_END