--- /dev/null
+/*
+ * 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/yosys.h"
+#include "kernel/sigtools.h"
+
+USING_YOSYS_NAMESPACE
+PRIVATE_NAMESPACE_BEGIN
+
+void aiger_encode(std::ostream &f, int x)
+{
+ log_assert(x >= 0);
+
+ while (x & ~0x7f) {
+ f.put((x & 0x7f) | 0x80);
+ x = x >> 7;
+ }
+
+ f.put(x);
+}
+
+struct AigerWriter
+{
+ Module *module;
+ bool zinit_mode;
+ SigMap sigmap;
+
+ dict<SigBit, bool> init_map;
+ pool<SigBit> input_bits, output_bits;
+ dict<SigBit, SigBit> not_map, ff_map;
+ dict<SigBit, pair<SigBit, SigBit>> and_map;
+ pool<SigBit> initstate_bits;
+
+ vector<pair<int, int>> aig_gates;
+ vector<int> aig_latchin, aig_latchinit, aig_outputs;
+ int aig_m = 0, aig_i = 0, aig_l = 0, aig_o = 0, aig_a = 0;
+
+ dict<SigBit, int> aig_map;
+ dict<SigBit, int> ordered_outputs;
+ dict<SigBit, int> ordered_latches;
+
+ dict<SigBit, int> init_inputs;
+ int initstate_ff = 0;
+
+ int bit2aig(SigBit bit)
+ {
+ if (aig_map.count(bit) == 0)
+ {
+ aig_map[bit] = -1;
+
+ if (initstate_bits.count(bit)) {
+ log_assert(initstate_ff > 0);
+ aig_map[bit] = initstate_ff;
+ } else
+ if (not_map.count(bit)) {
+ int a = bit2aig(not_map.at(bit)) ^ 1;
+ aig_map[bit] = a;
+ } else
+ if (and_map.count(bit)) {
+ auto args = and_map.at(bit);
+ int a0 = bit2aig(args.first);
+ int a1 = bit2aig(args.second);
+ aig_m++, aig_a++;
+ aig_map[bit] = 2*aig_m;
+ aig_gates.push_back(a0 > a1 ? make_pair(a0, a1) : make_pair(a1, a0));
+ }
+ }
+
+ log_assert(aig_map.at(bit) >= 0);
+ return aig_map.at(bit);
+ }
+
+ AigerWriter(Module *module, bool zinit_mode) : module(module), zinit_mode(zinit_mode), sigmap(module)
+ {
+ for (auto wire : module->wires())
+ {
+ if (wire->attributes.count("\\init")) {
+ SigSpec initsig = sigmap(wire);
+ Const initval = wire->attributes.at("\\init");
+ for (int i = 0; i < GetSize(wire) && i < GetSize(initval); i++)
+ init_map[initsig[i]] = initval[i];
+ }
+
+ if (wire->port_input)
+ for (auto bit : sigmap(wire))
+ input_bits.insert(bit);
+
+ if (wire->port_output)
+ for (auto bit : sigmap(wire))
+ output_bits.insert(bit);
+ }
+
+ for (auto cell : module->cells())
+ {
+ if (cell->type == "$_NOT_")
+ {
+ SigBit A = sigmap(cell->getPort("\\A").as_bit());
+ SigBit Y = sigmap(cell->getPort("\\Y").as_bit());
+ not_map[Y] = A;
+ continue;
+ }
+
+ if (cell->type.in("$_FF_", "$_DFF_N_", "$_DFF_P_"))
+ {
+ SigBit D = sigmap(cell->getPort("\\D").as_bit());
+ SigBit Q = sigmap(cell->getPort("\\Q").as_bit());
+ ff_map[Q] = D;
+ continue;
+ }
+
+ if (cell->type == "$_AND_")
+ {
+ SigBit A = sigmap(cell->getPort("\\A").as_bit());
+ SigBit B = sigmap(cell->getPort("\\B").as_bit());
+ SigBit Y = sigmap(cell->getPort("\\Y").as_bit());
+ and_map[Y] = make_pair(A, B);
+ continue;
+ }
+
+ if (cell->type == "$initstate")
+ {
+ SigBit Y = sigmap(cell->getPort("\\Y").as_bit());
+ initstate_bits.insert(Y);
+ continue;
+ }
+
+ log_error("Unsupported cell type: %s (%s)\n", log_id(cell->type), log_id(cell));
+ }
+
+ init_map.sort();
+ input_bits.sort();
+ output_bits.sort();
+ not_map.sort();
+ ff_map.sort();
+ and_map.sort();
+
+ aig_map[State::S0] = 0;
+ aig_map[State::S1] = 1;
+
+ for (auto bit : input_bits) {
+ aig_m++, aig_i++;
+ aig_map[bit] = 2*aig_m;
+ }
+
+ if (zinit_mode)
+ {
+ for (auto it : ff_map) {
+ if (init_map.count(it.first))
+ continue;
+ aig_m++, aig_i++;
+ init_inputs[it.first] = 2*aig_m;
+ }
+ }
+
+ for (auto it : ff_map) {
+ aig_m++, aig_l++;
+ aig_map[it.first] = 2*aig_m;
+ ordered_latches[it.first] = aig_l;
+ if (init_map.count(it.first) == 0)
+ aig_latchinit.push_back(2);
+ else
+ aig_latchinit.push_back(init_map.at(it.first) ? 1 : 0);
+ }
+
+ if (!initstate_bits.empty() || !init_inputs.empty()) {
+ aig_m++, aig_l++;
+ initstate_ff = 2*aig_m+1;
+ aig_latchinit.push_back(0);
+ }
+
+ for (auto it : ff_map)
+ aig_latchin.push_back(bit2aig(it.second));
+
+ if (!initstate_bits.empty() || !init_inputs.empty())
+ aig_latchin.push_back(1);
+
+ for (auto bit : output_bits) {
+ aig_o++;
+ ordered_outputs[bit] = aig_o;
+ aig_outputs.push_back(bit2aig(bit));
+ }
+ }
+
+ void write_aiger(std::ostream &f, bool ascii_mode, bool miter_mode)
+ {
+ log_assert(aig_m == aig_i + aig_l + aig_a);
+ log_assert(aig_l == GetSize(aig_latchin));
+ log_assert(aig_l == GetSize(aig_latchinit));
+ log_assert(aig_o == GetSize(aig_outputs));
+
+ if (miter_mode)
+ f << stringf("%s %d %d %d 0 %d %d\n", ascii_mode ? "aag" : "aig", aig_m, aig_i, aig_l, aig_a, aig_o);
+ else
+ f << stringf("%s %d %d %d %d %d\n", ascii_mode ? "aag" : "aig", aig_m, aig_i, aig_l, aig_o, aig_a);
+
+ if (ascii_mode)
+ {
+ for (int i = 0; i < aig_i; i++)
+ f << stringf("%d\n", 2*i+2);
+
+ for (int i = 0; i < aig_l; i++) {
+ if (aig_latchinit.at(i) == 0)
+ f << stringf("%d %d\n", 2*(aig_i+i)+2, aig_latchin.at(i));
+ else if (aig_latchinit.at(i) == 1)
+ f << stringf("%d %d 1\n", 2*(aig_i+i)+2, aig_latchin.at(i));
+ else if (aig_latchinit.at(i) == 2)
+ f << stringf("%d %d %d\n", 2*(aig_i+i)+2, aig_latchin.at(i), 2*(aig_i+i)+2);
+ }
+
+ for (int i = 0; i < aig_o; i++)
+ f << stringf("%d\n", aig_outputs.at(i));
+
+ for (int i = 0; i < aig_a; i++)
+ f << stringf("%d %d %d\n", 2*(aig_i+aig_l+i)+2, aig_gates.at(i).first, aig_gates.at(i).second);
+ }
+ else
+ {
+ for (int i = 0; i < aig_l; i++) {
+ if (aig_latchinit.at(i) == 0)
+ f << stringf("%d\n", aig_latchin.at(i));
+ else if (aig_latchinit.at(i) == 1)
+ f << stringf("%d 1\n", aig_latchin.at(i));
+ else if (aig_latchinit.at(i) == 2)
+ f << stringf("%d %d\n", aig_latchin.at(i), 2*(aig_i+i)+2);
+ }
+
+ for (int i = 0; i < aig_o; i++)
+ f << stringf("%d\n", aig_outputs.at(i));
+
+ for (int i = 0; i < aig_a; i++) {
+ int lhs = 2*(aig_i+aig_l+i)+2;
+ int rhs0 = aig_gates.at(i).first;
+ int rhs1 = aig_gates.at(i).second;
+ int delta0 = lhs - rhs0;
+ int delta1 = rhs0 - rhs1;
+ aiger_encode(f, delta0);
+ aiger_encode(f, delta1);
+ }
+ }
+
+ f << stringf("c\nGenerated by %s\n", yosys_version_str);
+ }
+
+ void write_map(std::ostream &f)
+ {
+ dict<int, string> input_lines;
+ dict<int, string> output_lines;
+ dict<int, string> latch_lines;
+ dict<int, string> wire_lines;
+
+ for (auto wire : module->wires())
+ {
+ if (wire->name[0] == '$')
+ continue;
+
+ SigSpec sig = sigmap(wire);
+
+ for (int i = 0; i < GetSize(wire); i++)
+ {
+ if (aig_map.count(sig[i]) == 0)
+ continue;
+
+ int a = aig_map.at(sig[i]);
+ // wire_lines[a] = stringf("wire %d %d %s\n", a, i, log_id(wire));
+
+ if (wire->port_input) {
+ log_assert((a & 1) == 0);
+ input_lines[a] = stringf("input %d %d %s\n", (a >> 1)-1, i, log_id(wire));
+ }
+
+ if (wire->port_output) {
+ int n = ordered_outputs.at(sig[i]);
+ output_lines[n] = stringf("output %d %d %s\n", n-1, i, log_id(wire));
+ }
+
+ if (ordered_latches.count(sig[i])) {
+ int n = ordered_latches.at(sig[i]);
+ latch_lines[n] = stringf("latch %d %d %s\n", n-1, i, log_id(wire));
+ }
+ }
+ }
+
+ input_lines.sort();
+ for (auto &it : input_lines)
+ f << it.second;
+
+ output_lines.sort();
+ for (auto &it : output_lines)
+ f << it.second;
+
+ latch_lines.sort();
+ for (auto &it : latch_lines)
+ f << it.second;
+
+ wire_lines.sort();
+ for (auto &it : wire_lines)
+ f << it.second;
+ }
+};
+
+struct AigerBackend : public Backend {
+ AigerBackend() : Backend("aiger", "write design to AIGER file") { }
+ virtual void help()
+ {
+ // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
+ log("\n");
+ log(" write_aiger [options] [filename]\n");
+ log("\n");
+ log("Write the current design to an AIGER file. The design must be flattened and\n");
+ log("must not contain any cell types except $_AND_, $_NOT_, and simple FF types.\n");
+ log("\n");
+ log(" -ascii\n");
+ log(" write ASCII version of AGIER format\n");
+ log("\n");
+ // log(" -zinit\n");
+ // log(" convert FFs to zero-initialized FFs, adding additional inputs for\n");
+ // log(" uninitialized FFs.\n");
+ // log("\n");
+ log(" -miter\n");
+ log(" design outputs are AIGER bad state properties\n");
+ log("\n");
+ log(" -map <filename>\n");
+ log(" write an extra file with port, latch and wire mappings\n");
+ log("\n");
+ }
+ virtual void execute(std::ostream *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design)
+ {
+ bool ascii_mode = false;
+ bool zinit_mode = false;
+ bool miter_mode = false;
+ std::string map_filename;
+
+ log_header(design, "Executing AIGER backend.\n");
+
+ size_t argidx;
+ for (argidx = 1; argidx < args.size(); argidx++)
+ {
+ if (args[argidx] == "-ascii") {
+ ascii_mode = true;
+ continue;
+ }
+ if (args[argidx] == "-zinit") {
+ zinit_mode = true;
+ continue;
+ }
+ if (args[argidx] == "-miter") {
+ miter_mode = true;
+ continue;
+ }
+ if (args[argidx] == "-map" && argidx+1 < args.size()) {
+ map_filename = args[++argidx];
+ continue;
+ }
+ break;
+ }
+ extra_args(f, filename, args, argidx);
+
+ Module *top_module = design->top_module();
+
+ if (top_module == nullptr)
+ log_error("Can't find top module in current design!\n");
+
+ if (zinit_mode)
+ log_error("zinit mode is not implemented yet.\n");
+
+ AigerWriter writer(top_module, zinit_mode);
+ writer.write_aiger(*f, ascii_mode, miter_mode);
+
+ if (!map_filename.empty()) {
+ std::ofstream mapf;
+ mapf.open(map_filename.c_str(), std::ofstream::trunc);
+ if (mapf.fail())
+ log_error("Can't open file `%s' for writing: %s\n", map_filename.c_str(), strerror(errno));
+ writer.write_map(mapf);
+ }
+ }
+} AigerBackend;
+
+PRIVATE_NAMESPACE_END
projects / yosys.git / commitdiff