Add "write_aiger -L"

Signed-off-by: Clifford Wolf <clifford@clifford.at>

diff --git a/backends/aiger/aiger.cc b/backends/aiger/aiger.cc
index 7c851bb91afe4faad50e20e01ec5b213ba321b80..0798fb35d8d4e259c8fe17a3ab0e0923b57029fa 100644 (file)
--- a/backends/aiger/aiger.cc
+++ b/backends/aiger/aiger.cc
@@ -101,7 +101,7 @@ struct AigerWriter
                return a;
        }
 
-       AigerWriter(Module *module, bool zinit_mode, bool imode, bool omode, bool bmode) : module(module), zinit_mode(zinit_mode), sigmap(module)
+       AigerWriter(Module *module, bool zinit_mode, bool imode, bool omode, bool bmode, bool lmode) : module(module), zinit_mode(zinit_mode), sigmap(module)
        {
                pool<SigBit> undriven_bits;
                pool<SigBit> unused_bits;
@@ -367,6 +367,12 @@ struct AigerWriter
                                aig_latchin.push_back(a);
                }
 
+               if (lmode && aig_l == 0) {
+                       aig_m++, aig_l++;
+                       aig_latchinit.push_back(0);
+                       aig_latchin.push_back(0);
+               }
+
                if (!initstate_bits.empty() || !init_inputs.empty())
                        aig_latchin.push_back(1);
 
@@ -704,9 +710,9 @@ struct AigerBackend : public Backend {
                log("    -vmap <filename>\n");
                log("        like -map, but more verbose\n");
                log("\n");
-               log("    -I, -O, -B\n");
-               log("        If the design contains no input/output/assert then create one\n");
-               log("        dummy input/output/bad_state pin to make the tools reading the\n");
+               log("    -I, -O, -B, -L\n");
+               log("        If the design contains no input/output/assert/flip-flop then create one\n");
+               log("        dummy input/output/bad_state-pin or latch to make the tools reading the\n");
                log("        AIGER file happy.\n");
                log("\n");
        }
@@ -720,6 +726,7 @@ struct AigerBackend : public Backend {
                bool imode = false;
                bool omode = false;
                bool bmode = false;
+               bool lmode = false;
                std::string map_filename;
 
                log_header(design, "Executing AIGER backend.\n");
@@ -764,6 +771,10 @@ struct AigerBackend : public Backend {
                                bmode = true;
                                continue;
                        }
+                       if (args[argidx] == "-L") {
+                               lmode = true;
+                               continue;
+                       }
                        break;
                }
                extra_args(f, filename, args, argidx);
@@ -773,7 +784,7 @@ struct AigerBackend : public Backend {
                if (top_module == nullptr)
                        log_error("Can't find top module in current design!\n");
 
-               AigerWriter writer(top_module, zinit_mode, imode, omode, bmode);
+               AigerWriter writer(top_module, zinit_mode, imode, omode, bmode, lmode);
                writer.write_aiger(*f, ascii_mode, miter_mode, symbols_mode);
 
                if (!map_filename.empty()) {