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-rw-r--r--backends/aiger/xaiger.cc227
1 files changed, 105 insertions, 122 deletions
diff --git a/backends/aiger/xaiger.cc b/backends/aiger/xaiger.cc
index df970e341..4810e0113 100644
--- a/backends/aiger/xaiger.cc
+++ b/backends/aiger/xaiger.cc
@@ -66,7 +66,6 @@ struct XAigerWriter
pool<SigBit> input_bits, output_bits;
dict<SigBit, SigBit> not_map, ff_map, alias_map;
dict<SigBit, pair<SigBit, SigBit>> and_map;
- //pool<SigBit> initstate_bits;
vector<std::tuple<SigBit,RTLIL::Cell*,RTLIL::IdString,int>> ci_bits;
vector<std::tuple<SigBit,RTLIL::Cell*,RTLIL::IdString,int,int>> co_bits;
vector<std::pair<SigBit,SigBit>> ff_bits;
@@ -97,10 +96,6 @@ struct XAigerWriter
{
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;
@@ -207,16 +202,6 @@ struct XAigerWriter
continue;
}
- //if (cell->type.in("$_FF_", "$_DFF_N_", "$_DFF_P_"))
- //{
- // SigBit D = sigmap(cell->getPort("\\D").as_bit());
- // SigBit Q = sigmap(cell->getPort("\\Q").as_bit());
- // unused_bits.erase(D);
- // undriven_bits.erase(Q);
- // ff_map[Q] = D;
- // continue;
- //}
-
if (cell->type == "$_AND_")
{
SigBit A = sigmap(cell->getPort("\\A").as_bit());
@@ -237,61 +222,62 @@ struct XAigerWriter
log_assert(!holes_mode);
- //if (cell->type == "$initstate")
+ // FIXME: Should short here, rather than provide $_DFF_[NP]_
+ // to ABC as a user cell
+ //if (cell->type.in(/*"$_FF_",*/ "$_DFF_N_", "$_DFF_P_"))
//{
- // SigBit Y = sigmap(cell->getPort("\\Y").as_bit());
- // undriven_bits.erase(Y);
- // initstate_bits.insert(Y);
+ // SigBit D = sigmap(cell->getPort("\\D").as_bit());
+ // SigBit Q = sigmap(cell->getPort("\\Q").as_bit());
+ // alias_map[Q] = D;
// continue;
//}
- RTLIL::Module* inst_module = module->design->module(cell->type);
- //bool inst_flop = inst_module ? inst_module->attributes.count("\\abc_flop") : false;
- //if (inst_flop) {
- // SigBit d, q;
- // for (const auto &c : cell->connections()) {
- // auto is_input = cell->input(c.first);
- // auto is_output = cell->output(c.first);
- // log_assert(is_input || is_output);
- // RTLIL::Wire* port = inst_module->wire(c.first);
- // for (auto b : c.second.bits()) {
- // if (is_input && port->attributes.count("\\abc_flop_d")) {
- // d = b;
- // SigBit I = sigmap(d);
- // if (I != d)
- // alias_map[I] = d;
- // unused_bits.erase(d);
- // }
- // if (is_output && port->attributes.count("\\abc_flop_q")) {
- // q = b;
- // SigBit O = sigmap(q);
- // if (O != q)
- // alias_map[O] = q;
- // undriven_bits.erase(O);
- // }
- // }
- // }
- // if (!abc_box_seen)
- // abc_box_seen = inst_module->attributes.count("\\abc_box_id");
- // ff_bits.emplace_back(d, q);
- //}
- /*else*/ if (inst_module && inst_module->attributes.count("\\abc_box_id")) {
- abc_box_seen = true;
+ RTLIL::Module* inst_module = !holes_mode ? module->design->module(cell->type) : nullptr;
+ bool inst_flop = inst_module ? inst_module->attributes.count("\\abc_flop") : false;
+ if (inst_flop) {
+ toposort.node(cell->name);
- if (!holes_mode) {
- toposort.node(cell->name);
- for (const auto &conn : cell->connections()) {
- if (cell->input(conn.first)) {
- // Ignore inout for the sake of topographical ordering
- if (cell->output(conn.first)) continue;
- for (auto bit : sigmap(conn.second))
- bit_users[bit].insert(cell->name);
- }
+ SigBit d, q;
+ for (const auto &c : cell->connections()) {
+ auto is_input = cell->input(c.first);
+ auto is_output = cell->output(c.first);
+ log_assert(is_input || is_output);
+ RTLIL::Wire* port = inst_module->wire(c.first);
+ if (is_input && port->attributes.count("\\abc_flop_d")) {
+ d = c.second;
+ SigBit I = sigmap(d);
+ if (I != d)
+ alias_map[I] = d;
+ unused_bits.erase(d);
+ }
+ if (is_output && port->attributes.count("\\abc_flop_q")) {
+ q = c.second;
+ SigBit O = sigmap(q);
+ if (O != q)
+ alias_map[O] = q;
+ undriven_bits.erase(O);
+ }
+ }
+ if (!abc_box_seen)
+ abc_box_seen = inst_module->attributes.count("\\abc_box_id");
+
+ ff_bits.emplace_back(d, q);
+ }
+ else if (inst_module && inst_module->attributes.count("\\abc_box_id")) {
+ abc_box_seen = true;
- if (cell->output(conn.first))
- for (auto bit : sigmap(conn.second))
- bit_drivers[bit].insert(cell->name);
+ toposort.node(cell->name);
+ for (const auto &conn : cell->connections()) {
+ if (cell->input(conn.first)) {
+ // Ignore inout for the sake of topographical ordering
+ if (cell->output(conn.first)) continue;
+ for (auto bit : sigmap(conn.second))
+ bit_users[bit].insert(cell->name);
}
+
+ if (cell->output(conn.first))
+ for (auto bit : sigmap(conn.second))
+ bit_drivers[bit].insert(cell->name);
}
}
else {
@@ -555,17 +541,17 @@ struct XAigerWriter
// }
//}
- for (auto it : ff_map) {
- aig_m++, aig_l++;
- aig_map[it.first] = 2*aig_m;
- ordered_latches[it.first] = aig_l-1;
- if (init_map.count(it.first) == 0)
- aig_latchinit.push_back(2);
- else
- aig_latchinit.push_back(init_map.at(it.first) ? 1 : 0);
- }
+ //for (auto it : ff_map) {
+ // aig_m++, aig_l++;
+ // aig_map[it.first] = 2*aig_m;
+ // ordered_latches[it.first] = aig_l-1;
+ // 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()) {
+ //if (!init_inputs.empty()) {
// aig_m++, aig_l++;
// initstate_ff = 2*aig_m+1;
// aig_latchinit.push_back(0);
@@ -589,16 +575,16 @@ struct XAigerWriter
// }
//}
- for (auto it : ff_map) {
- int a = bit2aig(it.second);
- int l = ordered_latches[it.first];
- if (zinit_mode && aig_latchinit.at(l) == 1)
- aig_latchin.push_back(a ^ 1);
- else
- aig_latchin.push_back(a);
- }
+ //for (auto it : ff_map) {
+ // int a = bit2aig(it.second);
+ // int l = ordered_latches[it.first];
+ // if (zinit_mode && aig_latchinit.at(l) == 1)
+ // aig_latchin.push_back(a ^ 1);
+ // else
+ // aig_latchin.push_back(a);
+ //}
- //if (!initstate_bits.empty() || !init_inputs.empty())
+ //if (!init_inputs.empty())
// aig_latchin.push_back(1);
for (auto &c : co_bits) {
@@ -617,7 +603,6 @@ struct XAigerWriter
RTLIL::SigBit bit = f.second;
aig_outputs.push_back(ff_aig_map.at(bit));
}
-
}
void write_aiger(std::ostream &f, bool ascii_mode)
@@ -639,14 +624,14 @@ struct XAigerWriter
for (int i = 0; i < aig_i; i++)
f << stringf("%d\n", 2*i+2);
- for (int i = 0; i < aig_l; i++) {
- if (zinit_mode || 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_l; i++) {
+ // if (zinit_mode || 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_obc; i++)
f << stringf("%d\n", aig_outputs.at(i));
@@ -665,14 +650,14 @@ struct XAigerWriter
}
else
{
- for (int i = 0; i < aig_l; i++) {
- if (zinit_mode || 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_l; i++) {
+ // if (zinit_mode || 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_obc; i++)
f << stringf("%d\n", aig_outputs.at(i));
@@ -789,21 +774,19 @@ struct XAigerWriter
f.write(reinterpret_cast<const char*>(&buffer_size_be), sizeof(buffer_size_be));
f.write(buffer_str.data(), buffer_str.size());
- /*if (!ff_bits.empty())*/ {
- std::stringstream r_buffer;
- auto write_r_buffer = std::bind(write_buffer, std::ref(r_buffer), std::placeholders::_1);
- log_debug("flopNum = %zu\n", ff_bits.size());
- write_r_buffer(ff_bits.size());
- //int mergeability_class = 1;
- //for (auto cell : ff_bits)
- // write_r_buffer(mergeability_class++);
-
- f << "r";
- std::string buffer_str = r_buffer.str();
- int32_t buffer_size_be = to_big_endian(buffer_str.size());
- f.write(reinterpret_cast<const char*>(&buffer_size_be), sizeof(buffer_size_be));
- f.write(buffer_str.data(), buffer_str.size());
- }
+ std::stringstream r_buffer;
+ auto write_r_buffer = std::bind(write_buffer, std::ref(r_buffer), std::placeholders::_1);
+ log_debug("flopNum = %zu\n", ff_bits.size());
+ write_r_buffer(ff_bits.size());
+ int mergeability_class = 1;
+ for (auto cell : ff_bits)
+ write_r_buffer(mergeability_class++);
+
+ f << "r";
+ buffer_str = r_buffer.str();
+ buffer_size_be = to_big_endian(buffer_str.size());
+ f.write(reinterpret_cast<const char*>(&buffer_size_be), sizeof(buffer_size_be));
+ f.write(buffer_str.data(), buffer_str.size());
if (holes_module) {
// NB: fixup_ports() will sort ports by name
@@ -885,14 +868,14 @@ struct XAigerWriter
// continue;
//}
- if (ordered_latches.count(sig[i])) {
- int l = ordered_latches.at(sig[i]);
- if (zinit_mode && (aig_latchinit.at(l) == 1))
- latch_lines[l] += stringf("invlatch %d %d %s\n", l, i, log_id(wire));
- else
- latch_lines[l] += stringf("latch %d %d %s\n", l, i, log_id(wire));
- continue;
- }
+ //if (ordered_latches.count(sig[i])) {
+ // int l = ordered_latches.at(sig[i]);
+ // if (zinit_mode && (aig_latchinit.at(l) == 1))
+ // latch_lines[l] += stringf("invlatch %d %d %s\n", l, i, log_id(wire));
+ // else
+ // latch_lines[l] += stringf("latch %d %d %s\n", l, i, log_id(wire));
+ // continue;
+ //}
if (verbose_map) {
if (aig_map.count(sig[i]) == 0)
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 05:02:08 +0000