mirror of https://github.com/YosysHQ/yosys.git
Added JSON backend
This commit is contained in:
Clifford Wolf
parent
422794c584
commit
8b488983d0
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OBJS += backends/json/json.o
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/*
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* yosys -- Yosys Open SYnthesis Suite
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*
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* Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#include "kernel/rtlil.h"
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#include "kernel/register.h"
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#include "kernel/sigtools.h"
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#include "kernel/celltypes.h"
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#include "kernel/log.h"
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#include <string>
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USING_YOSYS_NAMESPACE
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PRIVATE_NAMESPACE_BEGIN
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struct JsonWriter
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{
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std::ostream &f;
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bool use_selection;
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Design *design;
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Module *module;
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SigMap sigmap;
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int sigidcounter;
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dict<SigBit, string> sigids;
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JsonWriter(std::ostream &f, bool use_selection) : f(f), use_selection(use_selection) { }
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string get_string(string str)
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{
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// FIXME: proper string escaping
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return stringf("\"%s\"", str.c_str());
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}
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string get_name(IdString name)
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{
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return get_string(RTLIL::unescape_id(name));
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}
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string get_bits(SigSpec sig)
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{
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bool first = true;
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string str = "[";
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for (auto bit : sigmap(sig)) {
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str += first ? " " : ", ";
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first = false;
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if (sigids.count(bit) == 0) {
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string &s = sigids[bit];
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if (bit.wire == nullptr) {
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if (bit == State::S0) s = "\"0\"";
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else if (bit == State::S1) s = "\"0\"";
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else if (bit == State::Sz) s = "\"z\"";
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else s = "\"x\"";
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} else
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s = stringf("%d", sigidcounter++);
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}
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str += sigids[bit];
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}
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return str + " ]";
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}
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void write_module(Module *module_)
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{
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module = module_;
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log_assert(module->design == design);
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sigmap.set(module);
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sigids.clear();
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// reserve 0 and 1 to avoid confusion with "0" and "1"
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sigidcounter = 2;
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f << stringf(" %s: {\n", get_name(module->name).c_str());
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f << stringf(" \"ports\": {");
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bool first = true;
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for (auto n : module->ports) {
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Wire *w = module->wire(n);
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if (use_selection && !module->selected(w))
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continue;
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f << stringf("%s\n", first ? "" : ",");
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f << stringf(" %s: {\n", get_name(n).c_str());
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f << stringf(" \"direction\": \"%s\",\n", w->port_input ? w->port_output ? "inout" : "input" : "output");
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f << stringf(" \"bits\": %s\n", get_bits(w).c_str());
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f << stringf(" }");
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first = false;
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}
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f << stringf("\n },\n");
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f << stringf(" \"cells\": {");
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first = true;
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for (auto c : module->cells()) {
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if (use_selection && !module->selected(c))
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continue;
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f << stringf("%s\n", first ? "" : ",");
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f << stringf(" %s: {\n", get_name(c->name).c_str());
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f << stringf(" \"hide_name\": %s,\n", c->name[0] == '$' ? "1" : "0");
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f << stringf(" \"type\": %s,\n", get_name(c->type).c_str());
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f << stringf(" \"parameters\": {");
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bool first2 = true;
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for (auto ¶m : c->parameters) {
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f << stringf("%s\n", first2 ? "" : ",");
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f << stringf(" %s: ", get_name(param.first).c_str());
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if ((param.second.flags & RTLIL::ConstFlags::CONST_FLAG_STRING) != 0)
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f << get_string(param.second.decode_string());
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else if (GetSize(param.second.bits) > 32)
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f << get_string(param.second.as_string());
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else
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f << stringf("%d", param.second.as_int());
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first2 = false;
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}
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f << stringf("\n },\n");
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f << stringf(" \"connections\": {");
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first2 = true;
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for (auto &conn : c->connections()) {
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f << stringf("%s\n", first2 ? "" : ",");
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f << stringf(" %s: %s", get_name(conn.first).c_str(), get_bits(conn.second).c_str());
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first2 = false;
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}
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f << stringf("\n }\n");
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f << stringf(" }");
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first = false;
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}
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f << stringf("\n },\n");
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f << stringf(" \"netnames\": {");
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first = true;
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for (auto w : module->wires()) {
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if (use_selection && !module->selected(w))
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continue;
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f << stringf("%s\n", first ? "" : ",");
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f << stringf(" %s: {\n", get_name(w->name).c_str());
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f << stringf(" \"hide_name\": %s,\n", w->name[0] == '$' ? "1" : "0");
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f << stringf(" \"bits\": %s\n", get_bits(w).c_str());
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f << stringf(" }");
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first = false;
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}
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f << stringf("\n }\n");
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f << stringf(" }");
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}
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void write_design(Design *design_)
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{
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design = design_;
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f << stringf("{\n \"modules\": {\n");
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vector<Module*> modules = use_selection ? design->selected_modules() : design->modules();
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bool first_module = true;
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for (auto mod : modules) {
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if (!first_module)
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f << stringf(",\n");
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write_module(mod);
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first_module = false;
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}
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f << stringf("\n }\n}\n");
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}
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};
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struct JsonBackend : public Backend {
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JsonBackend() : Backend("json", "write design to a JSON file") { }
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virtual void help()
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{
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// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
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log("\n");
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log(" write_json [options] [filename]\n");
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log("\n");
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log("Write a JSON netlist of the current design.\n");
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log("\n");
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}
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virtual void execute(std::ostream *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design)
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{
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size_t argidx;
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for (argidx = 1; argidx < args.size(); argidx++)
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{
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// if (args[argidx] == "-verbose") {
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// verbose = true;
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// continue;
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// }
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break;
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}
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extra_args(f, filename, args, argidx);
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log_header("Executing JSON backend.\n");
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JsonWriter json_writer(*f, false);
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json_writer.write_design(design);
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}
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} JsonBackend;
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struct JsonPass : public Pass {
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JsonPass() : Pass("json", "write design to a JSON file") { }
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virtual void help()
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{
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// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
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log("\n");
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log(" write_json [options] [selection]\n");
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log("\n");
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log("Write a JSON netlist of all selected objects.\n");
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log("\n");
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log(" -o <filename>\n");
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log(" write to the specified file.\n");
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log("\n");
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}
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virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
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{
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std::string filename;
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size_t argidx;
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for (argidx = 1; argidx < args.size(); argidx++)
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{
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if (args[argidx] == "-o" && argidx+1 < args.size()) {
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filename = args[++argidx];
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continue;
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}
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break;
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}
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extra_args(args, argidx, design);
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std::ostream *f;
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std::stringstream buf;
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if (!filename.empty()) {
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std::ofstream *ff = new std::ofstream;
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ff->open(filename.c_str(), std::ofstream::trunc);
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if (ff->fail()) {
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delete ff;
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log_error("Can't open file `%s' for writing: %s\n", filename.c_str(), strerror(errno));
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}
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f = ff;
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} else {
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f = &buf;
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}
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JsonWriter json_writer(*f, true);
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json_writer.write_design(design);
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if (!filename.empty()) {
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delete f;
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} else {
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log("%s", buf.str().c_str());
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}
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}
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} JsonPass;
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PRIVATE_NAMESPACE_END
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