Disable synth_gowin -abc9 as it offers no advantages yet

diff --git a/techlibs/gowin/synth_gowin.cc b/techlibs/gowin/synth_gowin.cc
index 5acc096a33cae5d8ff77e6bbbdfb3a8ad1021377..8431473f08102cfecaed0e9e49ff65ab8bc53e66 100644 (file)
--- a/techlibs/gowin/synth_gowin.cc
+++ b/techlibs/gowin/synth_gowin.cc
@@ -62,16 +62,16 @@ struct SynthGowinPass : public ScriptPass
                log("        do not flatten design before synthesis\n");
                log("\n");
                log("    -retime\n");
-               log("        run 'abc' with -dff option\n");
+               log("        run 'abc' with '-dff -D 1' options\n");
                log("\n");
                log("    -nowidelut\n");
                log("        do not use muxes to implement LUTs larger than LUT4s\n");
                log("\n");
                log("    -noiopads\n");
                log("        do not emit IOB at top level ports\n");
-               log("\n");
-               log("    -abc9\n");
-               log("        use new ABC9 flow (EXPERIMENTAL)\n");
+               //log("\n");
+               //log("    -abc9\n");
+               //log("        use new ABC9 flow (EXPERIMENTAL)\n");
                log("\n");
                log("\n");
                log("The following commands are executed by this synthesis command:\n");
@@ -144,10 +144,10 @@ struct SynthGowinPass : public ScriptPass
                                nowidelut = true;
                                continue;
                        }
-                       if (args[argidx] == "-abc9") {
-                               abc9 = true;
-                               continue;
-                       }
+                       //if (args[argidx] == "-abc9") {
+                       //      abc9 = true;
+                       //      continue;
+                       //}
                        if (args[argidx] == "-noiopads") {
                                noiopads = true;
                                continue;
@@ -227,13 +227,13 @@ struct SynthGowinPass : public ScriptPass
 
                if (check_label("map_luts"))
                {
-                       if (nowidelut && abc9) {
+                       /*if (nowidelut && abc9) {
                                run("abc9 -lut 4");
-                       } else if (nowidelut && !abc9) {
+                       } else*/ if (nowidelut && !abc9) {
                                run("abc -lut 4");
-                       } else if (!nowidelut && abc9) {
+                       } else /*if (!nowidelut && abc9) {
                                run("abc9 -lut 4:8");
-                       } else if (!nowidelut && !abc9) {
+                       } else*/ if (!nowidelut && !abc9) {
                                run("abc -lut 4:8");
                        }
                        run("clean");