Added "synth -nordff -noalumacc"

diff --git a/techlibs/common/synth.cc b/techlibs/common/synth.cc
index c3e7288db5c23193ab1bff9f171cba144f5de1b5..f6853651e6d1f94f7bff0eb87f7e23a8bd22b738 100644 (file)
--- a/techlibs/common/synth.cc
+++ b/techlibs/common/synth.cc
@@ -58,6 +58,13 @@ struct SynthPass : public Pass {
                log("    -noabc\n");
                log("        do not run abc (as if yosys was compiled without ABC support)\n");
                log("\n");
+               log("    -noalumacc\n");
+               log("        do not run 'alumacc' pass. i.e. keep arithmetic operators in\n");
+               log("        their direct form ($add, $sub, etc.).\n");
+               log("\n");
+               log("    -nordff\n");
+               log("        passed to 'memory'. prohibits merging of FFs into memory read ports\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");
@@ -102,8 +109,9 @@ struct SynthPass : public Pass {
        }
        virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
        {
-               std::string top_module, fsm_opts;
+               std::string top_module, fsm_opts, memory_opts;
                std::string run_from, run_to;
+               bool noalumacc = false;
                bool noabc = false;
 
                size_t argidx;
@@ -132,6 +140,14 @@ struct SynthPass : public Pass {
                                noabc = true;
                                continue;
                        }
+                       if (args[argidx] == "-noalumacc") {
+                               noalumacc = true;
+                               continue;
+                       }
+                       if (args[argidx] == "-nordff") {
+                               memory_opts += " -nordff";
+                               continue;
+                       }
                        break;
                }
                extra_args(args, argidx, design);
@@ -159,12 +175,13 @@ struct SynthPass : public Pass {
                        Pass::call(design, "check");
                        Pass::call(design, "opt");
                        Pass::call(design, "wreduce");
-                       Pass::call(design, "alumacc");
+                       if (!noalumacc)
+                               Pass::call(design, "alumacc");
                        Pass::call(design, "share");
                        Pass::call(design, "opt");
                        Pass::call(design, "fsm" + fsm_opts);
                        Pass::call(design, "opt -fast");
-                       Pass::call(design, "memory -nomap");
+                       Pass::call(design, "memory -nomap" + memory_opts);
                        Pass::call(design, "opt_clean");
                }