From e789a005572f7b75b53ad71bc74f8e663a83370c Mon Sep 17 00:00:00 2001 From: Pepijn de Vos Date: Wed, 13 Jan 2021 17:24:28 +0100 Subject: [PATCH] add buffer option to spice backend --- backends/spice/spice.cc | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) diff --git a/backends/spice/spice.cc b/backends/spice/spice.cc index aa20f106a..ca5c680c9 100644 --- a/backends/spice/spice.cc +++ b/backends/spice/spice.cc @@ -64,7 +64,7 @@ static void print_spice_net(std::ostream &f, RTLIL::SigBit s, std::string &neg, } } -static void print_spice_module(std::ostream &f, RTLIL::Module *module, RTLIL::Design *design, std::string &neg, std::string &pos, std::string &ncpf, bool big_endian, bool use_inames) +static void print_spice_module(std::ostream &f, RTLIL::Module *module, RTLIL::Design *design, std::string &neg, std::string &pos, std::string &buf, std::string &ncpf, bool big_endian, bool use_inames) { SigMap sigmap(module); idict inums; @@ -121,10 +121,10 @@ static void print_spice_module(std::ostream &f, RTLIL::Module *module, RTLIL::De for (auto &conn : module->connections()) for (int i = 0; i < conn.first.size(); i++) { - f << stringf("V%d", conn_counter++); - print_spice_net(f, conn.first.extract(i, 1), neg, pos, ncpf, nc_counter, use_inames, inums); + f << (buf == "DC" ? stringf("V%d", conn_counter++) : stringf("X%d", cell_counter++)); print_spice_net(f, conn.second.extract(i, 1), neg, pos, ncpf, nc_counter, use_inames, inums); - f << stringf(" DC 0\n"); + print_spice_net(f, conn.first.extract(i, 1), neg, pos, ncpf, nc_counter, use_inames, inums); + f << (buf == "DC" ? " DC 0\n" : stringf(" %s\n", buf.c_str())); } } @@ -148,6 +148,10 @@ struct SpiceBackend : public Backend { log(" -pos net_name\n"); log(" set the net name for constant 1 (default: Vdd)\n"); log("\n"); + log(" -buf DC|subckt_name\n"); + log(" set the name for jumper element (default: DC)\n"); + log(" (used to connect different nets)\n"); + log("\n"); log(" -nc_prefix\n"); log(" prefix for not-connected nets (default: _NC)\n"); log("\n"); @@ -164,7 +168,7 @@ struct SpiceBackend : public Backend { std::string top_module_name; RTLIL::Module *top_module = NULL; bool big_endian = false, use_inames = false; - std::string neg = "Vss", pos = "Vdd", ncpf = "_NC"; + std::string neg = "Vss", pos = "Vdd", ncpf = "_NC", buf = "DC"; log_header(design, "Executing SPICE backend.\n"); @@ -187,6 +191,10 @@ struct SpiceBackend : public Backend { pos = args[++argidx]; continue; } + if (args[argidx] == "-buf" && argidx+1 < args.size()) { + buf = args[++argidx]; + continue; + } if (args[argidx] == "-nc_prefix" && argidx+1 < args.size()) { ncpf = args[++argidx]; continue; @@ -241,14 +249,14 @@ struct SpiceBackend : public Backend { *f << stringf(" %s", spice_id2str(wire->name).c_str()); } *f << stringf("\n"); - print_spice_module(*f, module, design, neg, pos, ncpf, big_endian, use_inames); + print_spice_module(*f, module, design, neg, pos, buf, ncpf, big_endian, use_inames); *f << stringf(".ENDS %s\n\n", spice_id2str(module->name).c_str()); } if (!top_module_name.empty()) { if (top_module == NULL) log_error("Can't find top module `%s'!\n", top_module_name.c_str()); - print_spice_module(*f, top_module, design, neg, pos, ncpf, big_endian, use_inames); + print_spice_module(*f, top_module, design, neg, pos, buf, ncpf, big_endian, use_inames); *f << stringf("\n"); } -- 2.30.2