/**
python-console
Copyright (C) 2018  Alex Tsui

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION W
/*
 *  yosys -- Yosys Open SYnthesis Suite
 *
 *  Copyright (C) 2020 William D. Jones <wjones@wdj-consulting.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.
 *
 */

#include "kernel/register.h"
#include "kernel/celltypes.h"
#include "kernel/rtlil.h"
#include "kernel/log.h"

USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN

struct SynthMachXO2Pass : public ScriptPass
{
	SynthMachXO2Pass() : ScriptPass("synth_machxo2", "synthesis for MachXO2 FPGAs. This work is experimental.") { }

	void help() override
	{
		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
		log("\n");
		log("    synth_machxo2 [options]\n");
		log("\n");
		log("This command runs synthesis for MachXO2 FPGAs.\n");
		log("\n");
		log("    -top <module>\n");
		log("        use the specified module as top module\n");
		log("\n");
		log("    -blif <file>\n");
		log("        write the design to the specified BLIF file. writing of an output file\n");
		log("        is omitted if this parameter is not specified.\n");
		log("\n");
		log("    -edif <file>\n");
		log("        write the design to the specified EDIF file. writing of an output file\n");
		log("        is omitted if this parameter is not specified.\n");
		log("\n");
		log("    -json <file>\n");
		log("        write the design to the specified JSON file. writing of an output file\n");
		log("        is omitted if this parameter is not specified.\n");
		log("\n");
		log("    -run <from_label>:<to_label>\n");
		log("        only run the commands between the labels (see below). an empty\n");
		log("        from label is synonymous to 'begin', and empty to label is\n");
		log("        synonymous to the end of the command list.\n");
		log("\n");
		log("    -nobram\n");
		log("        do not use block RAM cells in output netlist\n");
		log("\n");
		log("    -nolutram\n");
		log("        do not use LUT RAM cells in output netlist\n");
		log("\n");
		log("    -noflatten\n");
		log("        do not flatten design before synthesis\n");
		log("\n");
		log("    -noiopad\n");
		log("        do not insert IO buffers\n");
		log("\n");
		log("    -vpr\n");
		log("        generate an output netlist (and BLIF file) suitable for VPR\n");
		log("        (this feature is experimental and incomplete)\n");
		log("\n");
		log("\n");
		log("The following commands are executed by this synthesis command:\n");
		help_script();
		log("\n");
	}

	string top_opt, blif_file, edif_file, json_file;
	bool nobram, nolutram, flatten, vpr, noiopad;

	void clear_flags() override
	{
		top_opt = "-auto-top";
		blif_file = "";
		edif_file = "";
		json_file = "";
		nobram = false;
		nolutram = false;
		flatten = true;
		vpr = false;
		noiopad = false;
	}

	void execute(std::vector<std::string> args, RTLIL::Design *design) override
	{
		string run_from, run_to;
		clear_flags();

		size_t argidx;
		for (argidx = 1; argidx < args.size(); argidx++)
		{
			if (args[argidx] == "-top" && argidx+1 < args.size()) {
				top_opt = "-top " + args[++argidx];
				continue;
			}
			if (args[argidx] == "-blif" && argidx+1 < args.size()) {
				blif_file = args[++argidx];
				continue;
			}
			if (args[argidx] == "-edif" && argidx+1 < args.size()) {
				edif_file = args[++argidx];
				continue;
			}
			if (args[argidx] == "-json" && argidx+1 < args.size()) {
				json_file = args[++argidx];
				continue;
			}
			if (args[argidx] == "-run" && argidx+1 < args.size()) {
				size_t pos = args[argidx+1].find(':');
				if (pos == std::string::npos)
					break;
				run_from = args[++argidx].substr(0, pos);
				run_to = args[argidx].substr(pos+1);
				continue;
			}
			if (args[argidx] == "-flatten") {
				flatten = true;
				continue;
			}
			if (args[argidx] == "-noflatten") {
				flatten = false;
				continue;
			}
			if (args[argidx] == "-nobram") {
				nobram = true;
				continue;
			}
			if (args[argidx] == "-nolutram") {
				nolutram = true;
				continue;
			}
			if (args[argidx] == "-noiopad") {
				noiopad = true;
				continue;
			}
			if (args[argidx] == "-vpr") {
				vpr = true;
				continue;
			}
			break;
		}
		extra_args(args, argidx, design);

		if (!design->full_selection())
			log_cmd_error("This command only operates on fully selected designs!\n");

		log_header(design, "Executing SYNTH_MACHXO2 pass.\n");
		log_push();

		run_script(design, run_from, run_to);

		log_pop();
	}

	void script() override
	{
		if (check_label("begin"))
		{
			run("read_verilog -lib -icells +/machxo2/cells_sim.v");
			run(stringf("hierarchy -check %s", help_mode ? "-top <top>" : top_opt.c_str()));
		}

		if (check_label("flatten", "(unless -noflatten)"))
		{
			if (flatten || help_mode) {
				run("proc");
				run("flatten");
				run("tribuf -logic");
				run("deminout");
			}
		}

		if (check_label("coarse"))
		{
			run("synth -run coarse");
		}

		if (check_label("map_ram"))
		{
			std::string args = "";
			if (nobram)
				args += " -no-auto-block";
			if (nolutram)
				args += " -no-auto-distributed";
			if (help_mode)
				args += " [-no-auto-block] [-no-auto-distributed]";
			run("memory_libmap -lib +/machxo2/lutrams.txt -lib +/machxo2/brams.txt" + args, "(-no-auto-block if -nobram, -no-auto-distributed if -nolutram)");
			run("techmap -map +/machxo2/lutrams_map.v -map +/machxo2/brams_map.v");
		}

		if (check_label("fine"))
		{
			run("memory_map");
			run("opt -full");
			run("techmap -map +/techmap.v");
			run("opt -fast");
		}

		if (check_label("map_ios", "(unless -noiopad)"))
		{
			if (!noiopad || help_mode)
			{
				run("iopadmap -bits -outpad $__FACADE_OUTPAD I:O -inpad $__FACADE_INPAD O:I -toutpad $__FACADE_TOUTPAD ~T:I:O -tinoutpad $__FACADE_TINOUTPAD ~T:O:I:B A:top");
				run("attrmvcp -attr src -attr LOC t:$__FACADE_OUTPAD %x:+[O] t:$__FACADE_TOUTPAD %x:+[O] t:$__FACADE_TINOUTPAD %x:+[B]");
				run("attrmvcp -attr src -attr LOC -driven t:$__FACADE_INPAD %x:+[I]");
			}
		}

		if (check_label("map_ffs"))
		{
			run("dfflegalize -cell $_DFF_P_ 0");
		}

		if (check_label("map_luts"))
		{
			run("abc -lut 4 -dress");
			run("clean");
		}

		if (check_label("map_cells"))
		{
			run("techmap -map +/machxo2/cells_map.v");
			run("clean");
		}

		if (check_label("check"))
		{
			run("hierarchy -check");
			run("stat");
			run("blackbox =A:whitebox");
		}

		if (check_label("blif"))
		{
			if (!blif_file.empty() || help_mode) {
				if (vpr || help_mode) {
					run(stringf("opt_clean -purge"),
							"                                 (vpr mode)");
					run(stringf("write_blif -attr -cname -conn -param %s",
							help_mode ? "<file-name>" : blif_file.c_str()),
							" (vpr mode)");
				}
				if (!vpr)
					run(stringf("write_blif -gates -attr -param %s",
							help_mode ? "<file-name>" : blif_file.c_str()),
							"       (non-vpr mode)");
			}
		}

		if (check_label("edif"))
		{
			if (!edif_file.empty() || help_mode)
				run(stringf("write_edif %s", help_mode ? "<file-name>" : edif_file.c_str()));
		}

		if (check_label("json"))
		{
			if (!json_file.empty() || help_mode)
				run(stringf("write_json %s", help_mode ? "<file-name>" : json_file.c_str()));
		}
	}
} SynthMachXO2Pass;

PRIVATE_NAMESPACE_END