/*
 *  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/rtlil.h"
#include "kernel/log.h"

USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN

struct SynthIntelPass : public ScriptPass {
  SynthIntelPass() : ScriptPass("synth_intel", "synthesis for Intel (Altera) FPGAs.") { }

  virtual void help() YS_OVERRIDE
  {
    //   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
    log("\n");
    log("    synth_intel [options]\n");
    log("\n");
    log("This command runs synthesis for Intel FPGAs.\n");
    log("\n");
    log("    -family < max10 | a10gx | cyclonev | cycloneiv | cycloneive>\n");
    log("        generate the synthesis netlist for the specified family.\n");
    log("        MAX10 is the default target if not family argument specified.\n");
    log("        For Cyclone GX devices, use cycloneiv argument; For Cyclone E, use cycloneive.\n");
    log("        Cyclone V and Arria 10 GX devices are experimental, use it with a10gx argument.\n");
    log("\n");
    log("    -top <module>\n");
    log("        use the specified module as top module (default='top')\n");
    log("\n");
    log("    -vqm <file>\n");
    log("        write the design to the specified Verilog Quartus Mapping File. Writing of an\n");
    log("        output file 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 altsyncram cells in output netlist\n");
    log("\n");
    log("    -noflatten\n");
    log("        do not flatten design before synthesis\n");
    log("\n");
    log("    -retime\n");
    log("        run 'abc' with -dff option\n");
    log("\n");
    log("The following commands are executed by this synthesis command:\n");
    help_script();
    log("\n");
  }

  string top_opt, family_opt, vout_file;
  bool retime, flatten, nobram;

  virtual void clear_flags() YS_OVERRIDE
  {
    top_opt = "-auto-top";
    family_opt = "max10";
    vout_file = "";
    retime = false;
    flatten = true;
    nobram = false;
  }

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

    size_t argidx;
    for (argidx = 1; argidx < args.size(); argidx++)
      {
        if (args[argidx] == "-family" && argidx+1 < args.size()) {
          family_opt = args[++argidx];
          continue;
        }
        if (args[argidx] == "-top" && argidx+1 < args.size()) {
          top_opt = "-top " + args[++argidx];
          continue;
        }
        if (args[argidx] == "-vqm" && argidx+1 < args.size()) {
          vout_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] == "-nobram") {
          nobram = true;
          continue;
        }
        if (args[argidx] == "-flatten") {
          flatten = true;
          continue;
        }
        if (args[argidx] == "-retime") {
          retime = true;
          continue;
        }
        break;
      }
    extra_args(args, argidx, design);

    if (!design->full_selection())
      log_cmd_error("This command only operates on fully selected designs!\n");
    if (family_opt != "max10" && family_opt !="a10gx" && family_opt != "cyclonev" && family_opt !="cycloneiv" && family_opt !="cycloneive")
      log_cmd_error("Invalid or not family specified: '%s'\n", family_opt.c_str());

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

    run_script(design, run_from, run_to);

    log_pop();
  }

  virtual void script() YS_OVERRIDE
  {
    if (check_label("begin"))
      {
        if(check_label("family") && family_opt=="max10")
          run("read_verilog -sv -lib +/intel/max10/cells_sim.v");
        else if(check_label("family") && family_opt=="a10gx")
          run("read_verilog -sv -lib +/intel/a10gx/cells_sim.v");
        else if(check_label("family") && family_opt=="cyclonev")
          run("read_verilog -sv -lib +/intel/cyclonev/cells_sim.v");
        else if(check_label("family") && family_opt=="cycloneiv")
          run("read_verilog -sv -lib +/intel/cycloneiv/cells_sim.v");
        else
          run("read_verilog -sv -lib +/intel/cycloneive/cells_sim.v");
        // Misc and common cells
        run("read_verilog -sv -lib +/intel/common/m9k_bb.v");
        run("read_verilog -sv -lib +/intel/common/altpll_bb.v");
        run(stringf("hierarchy -check %s", help_mode ? "-top <top>" : top_opt.c_str()));
      }

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

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

    if (!nobram && check_label("bram", "(skip if -nobram)"))
      {
        run("memory_bram -rules +/intel/common/brams.txt");
        run("techmap -map +/intel/common/brams_map.v");
      }

    if (check_label("fine"))
      {
        run("opt -fast -mux_undef -undriven -fine -full");
        run("memory_map");
        run("opt -undriven -fine");
        run("dffsr2dff");
        run("dff2dffe -direct-match $_DFF_*");
        run("opt -fine");
        run("techmap -map +/techmap.v");
        run("opt -full");
        run("clean -purge");
        run("setundef -undriven -zero");
        if (retime || help_mode)
          run("abc -markgroups -dff", "(only if -retime)");
      }

    if (check_label("map_luts"))
      {
        if(family_opt=="a10gx" || family_opt=="cyclonev")
          run("abc -luts 2:2,3,6:5,10" + string(retime ? " -dff" : ""));
        else
          run("abc -lut 4" + string(retime ? " -dff" : ""));
        run("clean");
      }

    if (check_label("map_cells"))
      {
        run("iopadmap -bits -outpad $__outpad I:O -inpad $__inpad O:I");
        if(family_opt=="max10")
          run("techmap -map +/intel/max10/cells_map.v");
        else if(family_opt=="a10gx")
          run("techmap -map +/intel/a10gx/cells_map.v");
        else if(family_opt=="cyclonev")
          run("techmap -map +/intel/cyclonev/cells_map.v");
        else if(family_opt=="cycloneiv")
          run("techmap -map +/intel/cycloneiv/cells_map.v");
        else
          run("techmap -map +/intel/cycloneive/cells_map.v");
        run("dffinit -ff dffeas Q INIT");
        run("clean -purge");
      }

    if (check_label("check"))
      {
        run("hierarchy -check");
        run("stat");
        run("check -noinit");
      }

    if (check_label("vqm"))
      {
        if (!vout_file.empty() || help_mode)
          run(stringf("write_verilog -attr2comment -defparam -nohex -decimal -renameprefix syn_ %s",
                      help_mode ? "<file-name>" : vout_file.c_str()));
      }
  }
} SynthIntelPass;

PRIVATE_NAMESPACE_END