From e789a005572f7b75b53ad71bc74f8e663a83370c Mon Sep 17 00:00:00 2001
From: Pepijn de Vos <pepijndevos@gmail.com>
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<IdString, 1> 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");
}