diff options
Diffstat (limited to 'backends/blif/blif.cc')
-rw-r--r-- | backends/blif/blif.cc | 42 |
1 files changed, 40 insertions, 2 deletions
diff --git a/backends/blif/blif.cc b/backends/blif/blif.cc index 0fd03389d..f87880616 100644 --- a/backends/blif/blif.cc +++ b/backends/blif/blif.cc @@ -35,6 +35,9 @@ struct BlifDumperConfig bool conn_mode; bool impltf_mode; + std::string buf_type, buf_in, buf_out; + std::string true_type, true_out, false_type, false_out; + BlifDumperConfig() : subckt_mode(false), conn_mode(false), impltf_mode(false) { } }; @@ -115,8 +118,14 @@ struct BlifDumper fprintf(f, "\n"); if (!config->impltf_mode) { - fprintf(f, ".names $false\n"); - fprintf(f, ".names $true\n1\n"); + if (!config->false_type.empty()) + fprintf(f, ".subckt %s %s=$false\n", config->false_type.c_str(), config->false_out.c_str()); + else + fprintf(f, ".names $false\n"); + if (!config->true_type.empty()) + fprintf(f, ".subckt %s %s=$true\n", config->true_type.c_str(), config->true_out.c_str()); + else + fprintf(f, ".names $true\n1\n"); } for (auto &cell_it : module->cells) @@ -182,9 +191,13 @@ struct BlifDumper for (int i = 0; i < conn.first.width; i++) if (config->conn_mode) fprintf(f, ".conn %s %s\n", cstr(conn.second.extract(i, 1)), cstr(conn.first.extract(i, 1))); + else if (!config->buf_type.empty()) + fprintf(f, ".subckt %s %s=%s %s=%s\n", config->buf_type.c_str(), config->buf_in.c_str(), cstr(conn.second.extract(i, 1)), + config->buf_out.c_str(), cstr(conn.first.extract(i, 1))); else fprintf(f, ".names %s %s\n1 1\n", cstr(conn.second.extract(i, 1)), cstr(conn.first.extract(i, 1))); + fprintf(f, ".end\n"); } @@ -208,6 +221,12 @@ struct BlifBackend : public Backend { log(" -top top_module\n"); log(" set the specified module as design top module\n"); log("\n"); + log(" -buf <cell-type> <in-port> <out-port>\n"); + log(" use cells of type <cell-type> with the specified port names for buffers\n"); + log("\n"); + log(" -true <cell-type> <out-port>\n"); + log(" -false <cell-type> <out-port>\n"); + log(" use the specified cell types to drive nets that are constant 1 or 0\n"); log("\n"); log("The following options can be usefull when the generated file is not going to be\n"); log("read by a BLIF parser but a custom tool. It is recommended to not name the output\n"); @@ -228,6 +247,9 @@ struct BlifBackend : public Backend { virtual void execute(FILE *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design) { std::string top_module_name; + std::string buf_type, buf_in, buf_out; + std::string true_type, true_out; + std::string false_type, false_out; BlifDumperConfig config; log_header("Executing BLIF backend.\n"); @@ -239,6 +261,22 @@ struct BlifBackend : public Backend { top_module_name = args[++argidx]; continue; } + if (args[argidx] == "-buf" && argidx+3 < args.size()) { + config.buf_type = args[++argidx]; + config.buf_in = args[++argidx]; + config.buf_out = args[++argidx]; + continue; + } + if (args[argidx] == "-true" && argidx+2 < args.size()) { + config.true_type = args[++argidx]; + config.true_out = args[++argidx]; + continue; + } + if (args[argidx] == "-false" && argidx+2 < args.size()) { + config.false_type = args[++argidx]; + config.false_out = args[++argidx]; + continue; + } if (args[argidx] == "-subckt") { config.subckt_mode = true; continue; |