add -noalu and -json option for apicula

diff --git a/techlibs/gowin/synth_gowin.cc b/techlibs/gowin/synth_gowin.cc
index 4d1e968ae6efdaa25c46ba0fff38bc2c9d3cc2e5..5bf0894da12b36cbb82207da536583b5f32d8fbf 100644 (file)
--- a/techlibs/gowin/synth_gowin.cc
+++ b/techlibs/gowin/synth_gowin.cc
@@ -44,6 +44,11 @@ struct SynthGowinPass : public ScriptPass
                log("        write the design to the specified Verilog netlist file. writing of an\n");
                log("        output file is omitted if this parameter is not specified.\n");
                log("\n");
+               log("    -json <file>\n");
+               log("        write the design to the specified JSON netlist file. writing of an\n");
+               log("        output file is omitted if this parameter is not specified.\n");
+               log("        This disables features not yet supported by nexpnr-gowin.\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");
@@ -70,6 +75,9 @@ struct SynthGowinPass : public ScriptPass
                log("    -noiopads\n");
                log("        do not emit IOB at top level ports\n");
                log("\n");
+               log("    -noalu\n");
+               log("        do not use ALU cells\n");
+               log("\n");
                log("    -abc9\n");
                log("        use new ABC9 flow (EXPERIMENTAL)\n");
                log("\n");
@@ -79,13 +87,14 @@ struct SynthGowinPass : public ScriptPass
                log("\n");
        }
 
-       string top_opt, vout_file;
-       bool retime, nobram, nolutram, flatten, nodffe, nowidelut, abc9, noiopads;
+       string top_opt, vout_file, json_file;
+       bool retime, nobram, nolutram, flatten, nodffe, nowidelut, abc9, noiopads, noalu;
 
        void clear_flags() override
        {
                top_opt = "-auto-top";
                vout_file = "";
+               json_file = "";
                retime = false;
                flatten = true;
                nobram = false;
@@ -94,6 +103,7 @@ struct SynthGowinPass : public ScriptPass
                nowidelut = false;
                abc9 = false;
                noiopads = false;
+               noalu = false;
        }
 
        void execute(std::vector<std::string> args, RTLIL::Design *design) override
@@ -112,6 +122,14 @@ struct SynthGowinPass : public ScriptPass
                                vout_file = args[++argidx];
                                continue;
                        }
+                       if (args[argidx] == "-json" && argidx+1 < args.size()) {
+                               json_file = args[++argidx];
+                               nobram = true;
+                               nolutram = true;
+                               nowidelut = true;
+                               noalu = true;
+                               continue;
+                       }
                        if (args[argidx] == "-run" && argidx+1 < args.size()) {
                                size_t pos = args[argidx+1].find(':');
                                if (pos == std::string::npos)
@@ -144,6 +162,10 @@ struct SynthGowinPass : public ScriptPass
                                nowidelut = true;
                                continue;
                        }
+                       if (args[argidx] == "-noalu") {
+                               noalu = true;
+                               continue;
+                       }
                        if (args[argidx] == "-abc9") {
                                abc9 = true;
                                continue;
@@ -210,7 +232,11 @@ struct SynthGowinPass : public ScriptPass
 
                if (check_label("map_gates"))
                {
-                       run("techmap -map +/techmap.v -map +/gowin/arith_map.v");
+                       if (noalu) {
+                               run("techmap -map +/techmap.v");
+                       } else {
+                               run("techmap -map +/techmap.v -map +/gowin/arith_map.v");
+                       }
                        run("opt -fast");
                        if (retime || help_mode)
                                run("abc -dff -D 1", "(only if -retime)");
@@ -270,6 +296,9 @@ struct SynthGowinPass : public ScriptPass
                        if (!vout_file.empty() || help_mode)
                                 run(stringf("write_verilog -decimal -attr2comment -defparam -renameprefix gen %s",
                                                help_mode ? "<file-name>" : vout_file.c_str()));
+                       if (!json_file.empty() || help_mode)
+                                run(stringf("write_json %s",
+                                               help_mode ? "<file-name>" : json_file.c_str()));
                }
        }
 } SynthGowinPass;