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-rw-r--r--backends/spice/Makefile.inc3
-rw-r--r--backends/spice/spice.cc225
2 files changed, 228 insertions, 0 deletions
diff --git a/backends/spice/Makefile.inc b/backends/spice/Makefile.inc
new file mode 100644
index 00000000..9c8530cb
--- /dev/null
+++ b/backends/spice/Makefile.inc
@@ -0,0 +1,3 @@
+
+OBJS += backends/spice/spice.o
+
diff --git a/backends/spice/spice.cc b/backends/spice/spice.cc
new file mode 100644
index 00000000..a2be5d0b
--- /dev/null
+++ b/backends/spice/spice.cc
@@ -0,0 +1,225 @@
+/*
+ * yosys -- Yosys Open SYnthesis Suite
+ *
+ * Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "kernel/rtlil.h"
+#include "kernel/register.h"
+#include "kernel/sigtools.h"
+#include "kernel/celltypes.h"
+#include "kernel/log.h"
+#include <string>
+#include <assert.h>
+
+static void print_spice_net(FILE *f, RTLIL::SigSpec s, std::string &neg, std::string &pos, std::string &ncpf, int &nc_counter)
+{
+ log_assert(s.chunks.size() == 1 && s.chunks[0].width == 1);
+ if (s.chunks[0].wire) {
+ if (s.chunks[0].wire->width > 1)
+ fprintf(f, " %s[%d]", RTLIL::id2cstr(s.chunks[0].wire->name), s.chunks[0].offset);
+ else
+ fprintf(f, " %s", RTLIL::id2cstr(s.chunks[0].wire->name));
+ } else {
+ if (s.chunks[0].data.bits.at(0) == RTLIL::State::S0)
+ fprintf(f, " %s", neg.c_str());
+ else if (s.chunks[0].data.bits.at(0) == RTLIL::State::S1)
+ fprintf(f, " %s", pos.c_str());
+ else
+ fprintf(f, " %s%d", ncpf.c_str(), nc_counter++);
+ }
+}
+
+static void print_spice_module(FILE *f, RTLIL::Module *module, RTLIL::Design *design, std::string &neg, std::string &pos, std::string &ncpf, bool big_endian)
+{
+ SigMap sigmap(module);
+ int cell_counter = 0, conn_counter = 0, nc_counter = 0;
+
+ for (auto &cell_it : module->cells)
+ {
+ RTLIL::Cell *cell = cell_it.second;
+ fprintf(f, "X%d", cell_counter++);
+
+ std::vector<RTLIL::SigSpec> port_sigs;
+
+ if (design->modules.count(cell->type) == 0)
+ {
+ log("Warning: no (placeholder) module for cell type `%s' (%s.%s) found! Guessing order of ports.\n",
+ RTLIL::id2cstr(cell->type), RTLIL::id2cstr(module->name), RTLIL::id2cstr(cell->name));
+ for (auto &conn : cell->connections) {
+ RTLIL::SigSpec sig = sigmap(conn.second);
+ port_sigs.push_back(sig);
+ }
+ }
+ else
+ {
+ RTLIL::Module *mod = design->modules.at(cell->type);
+
+ std::vector<RTLIL::Wire*> ports;
+ for (auto wire_it : mod->wires) {
+ RTLIL::Wire *wire = wire_it.second;
+ if (wire->port_id == 0)
+ continue;
+ while (int(ports.size()) < wire->port_id)
+ ports.push_back(NULL);
+ ports.at(wire->port_id-1) = wire;
+ }
+
+ for (RTLIL::Wire *wire : ports) {
+ log_assert(wire != NULL);
+ RTLIL::SigSpec sig(RTLIL::State::Sz, wire->width);
+ if (cell->connections.count(wire->name) > 0) {
+ sig = sigmap(cell->connections.at(wire->name));
+ sig.extend(wire->width, false);
+ }
+ port_sigs.push_back(sig);
+ }
+ }
+
+ for (auto &sig : port_sigs) {
+ for (int i = 0; i < sig.width; i++) {
+ RTLIL::SigSpec s = sig.extract(big_endian ? sig.width - 1 - i : i, 1);
+ log_assert(s.chunks.size() == 1 && s.chunks[0].width == 1);
+ print_spice_net(f, s, neg, pos, ncpf, nc_counter);
+ }
+ }
+
+ fprintf(f, " %s\n", RTLIL::id2cstr(cell->type));
+ }
+
+ for (auto &conn : module->connections)
+ for (int i = 0; i < conn.first.width; i++) {
+ fprintf(f, "V%d", conn_counter++);
+ print_spice_net(f, conn.first.extract(i, 1), neg, pos, ncpf, nc_counter);
+ print_spice_net(f, conn.second.extract(i, 1), neg, pos, ncpf, nc_counter);
+ fprintf(f, " DC 0\n");
+ }
+}
+
+struct SpiceBackend : public Backend {
+ SpiceBackend() : Backend("spice", "write design to SPICE netlist file") { }
+ virtual void help()
+ {
+ // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
+ log("\n");
+ log(" write_spice [options] [filename]\n");
+ log("\n");
+ log("Write the current design to an SPICE netlist file.\n");
+ log("\n");
+ log(" -big_endian\n");
+ log(" generate multi-bit ports in MSB first order \n");
+ log(" (default is LSB first)\n");
+ log("\n");
+ log(" -neg net_name\n");
+ log(" set the net name for constant 0 (default: Vss)\n");
+ log("\n");
+ log(" -pos net_name\n");
+ log(" set the net name for constant 1 (default: Vdd)\n");
+ log("\n");
+ log(" -nc_prefix\n");
+ log(" prefix for not-connected nets (default: _NC)\n");
+ log("\n");
+ log(" -top top_module\n");
+ log(" set the specified module as design top module\n");
+ log("\n");
+ }
+ virtual void execute(FILE *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design)
+ {
+ std::string top_module_name;
+ RTLIL::Module *top_module;
+ bool big_endian = false;
+ std::string neg = "Vss", pos = "Vdd", ncpf = "_NC";
+
+ log_header("Executing SPICE backend.\n");
+
+ size_t argidx;
+ for (argidx = 1; argidx < args.size(); argidx++)
+ {
+ if (args[argidx] == "-top" && argidx+1 < args.size()) {
+ top_module_name = args[++argidx];
+ continue;
+ }
+ if (args[argidx] == "-big_endian") {
+ big_endian = true;
+ continue;
+ }
+ break;
+ }
+ extra_args(f, filename, args, argidx);
+
+ fprintf(f, "\n");
+ fprintf(f, "*************************************\n");
+ fprintf(f, "* SPICE netlist, generated by Yosys *\n");
+ fprintf(f, "*************************************\n");
+ fprintf(f, "\n");
+ fprintf(f, ".GLOBAL %s\n", neg.c_str());
+ fprintf(f, ".GLOBAL %s\n", pos.c_str());
+ fprintf(f, "\n");
+
+ for (auto module_it : design->modules)
+ {
+ RTLIL::Module *module = module_it.second;
+ if ((module->attributes.count("\\placeholder") > 0) > 0)
+ continue;
+
+ if (module->processes.size() != 0)
+ log_error("Found unmapped processes in module %s: unmapped processes are not supported in EDIF backend!\n", RTLIL::id2cstr(module->name));
+ if (module->memories.size() != 0)
+ log_error("Found munmapped emories in module %s: unmapped memories are not supported in EDIF backend!\n", RTLIL::id2cstr(module->name));
+
+ if (module->name == RTLIL::escape_id(top_module_name)) {
+ top_module = module;
+ continue;
+ }
+
+ std::vector<RTLIL::Wire*> ports;
+ for (auto wire_it : module->wires) {
+ RTLIL::Wire *wire = wire_it.second;
+ if (wire->port_id == 0)
+ continue;
+ while (int(ports.size()) < wire->port_id)
+ ports.push_back(NULL);
+ ports.at(wire->port_id-1) = wire;
+ }
+
+ fprintf(f, ".SUBCKT %s", RTLIL::id2cstr(module->name));
+ for (RTLIL::Wire *wire : ports) {
+ log_assert(wire != NULL);
+ if (wire->width > 1) {
+ for (int i = 0; i < wire->width; i++)
+ fprintf(f, " %s[%d]", RTLIL::id2cstr(wire->name), big_endian ? wire->width - 1 - i : i);
+ } else
+ fprintf(f, " %s", RTLIL::id2cstr(wire->name));
+ }
+ fprintf(f, "\n");
+ print_spice_module(f, module, design, neg, pos, ncpf, big_endian);
+ fprintf(f, ".ENDS %s\n\n", RTLIL::id2cstr(module->name));
+ }
+
+ 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);
+ fprintf(f, "\n");
+ }
+
+ fprintf(f, "************************\n");
+ fprintf(f, "* end of SPICE netlist *\n");
+ fprintf(f, "************************\n");
+ fprintf(f, "\n");
+ }
+} SpiceBackend;
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-18 20:58:37 +0000