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write_xaiger to consume abc9_init attribute for abc9_flops

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This commit is contained in:
Eddie Hung 2019-12-03 18:47:44 -08:00
parent a181ff66d3
commit df52bc80d8
1 changed files with 28 additions and 34 deletions
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62
backends/aiger/xaiger.cc
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@ -78,13 +78,12 @@ struct XAigerWriter
Module *module;
SigMap sigmap;
dict<SigBit, bool> init_map;
pool<SigBit> input_bits, output_bits;
dict<SigBit, SigBit> not_map, alias_map;
dict<SigBit, pair<SigBit, SigBit>> and_map;
vector<std::tuple<SigBit,RTLIL::Cell*,RTLIL::IdString,int>> ci_bits;
vector<std::tuple<SigBit,RTLIL::Cell*,RTLIL::IdString,int,int>> co_bits;
dict<SigBit, int> ff_bits;
dict<SigBit, std::pair<int, RTLIL::State>> ff_bits;
dict<SigBit, float> arrival_times;
vector<pair<int, int>> aig_gates;
@ -157,14 +156,6 @@ struct XAigerWriter
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++)
if (initval[i] == State::S0 || initval[i] == State::S1)
init_map[initsig[i]] = initval[i] == State::S1;
}
bool keep = wire->attributes.count("\\keep");
for (int i = 0; i < GetSize(wire); i++)
@ -254,7 +245,7 @@ struct XAigerWriter
unused_bits.erase(D);
undriven_bits.erase(Q);
alias_map[Q] = D;
auto r = ff_bits.insert(std::make_pair(D, 0));
auto r = ff_bits.insert(std::make_pair(D, std::make_pair(0, State::Sx)));
log_assert(r.second);
continue;
}
@ -368,11 +359,20 @@ struct XAigerWriter
else
d = cell->getPort(r.first->second.first);
auto &rhs = ff_bits.at(d);
auto it = cell->attributes.find(ID(abc9_mergeability));
log_assert(it != cell->attributes.end());
ff_bits.at(d) = it->second.as_int();
rhs.first = it->second.as_int();
cell->attributes.erase(it);
it = cell->attributes.find(ID(abc9_init));
log_assert(it != cell->attributes.end());
log_assert(GetSize(it->second) == 1);
rhs.second = it->second[0];
cell->attributes.erase(it);
auto arrival = r.first->second.second;
if (arrival)
arrival_times[d] = arrival;
@ -805,10 +805,23 @@ struct XAigerWriter
auto write_r_buffer = std::bind(write_buffer, std::ref(r_buffer), std::placeholders::_1);
log_debug("flopNum = %d\n", GetSize(ff_bits));
write_r_buffer(ff_bits.size());
std::stringstream s_buffer;
auto write_s_buffer = std::bind(write_buffer, std::ref(s_buffer), std::placeholders::_1);
write_s_buffer(ff_bits.size());
for (const auto &i : ff_bits) {
log_assert(i.second > 0);
write_r_buffer(i.second);
const SigBit &bit = i.first;
int mergeability = i.second.first;
log_assert(mergeability > 0);
write_r_buffer(mergeability);
State init = i.second.second;
if (init == State::S1)
write_s_buffer(1);
else if (init == State::S0)
write_s_buffer(0);
else
write_s_buffer(0);
write_i_buffer(arrival_times.at(bit, 0));
//write_o_buffer(0);
}
@ -819,22 +832,6 @@ struct XAigerWriter
f.write(reinterpret_cast<const char*>(&buffer_size_be), sizeof(buffer_size_be));
f.write(buffer_str.data(), buffer_str.size());
std::stringstream s_buffer;
auto write_s_buffer = std::bind(write_buffer, std::ref(s_buffer), std::placeholders::_1);
write_s_buffer(ff_bits.size());
for (const auto &i : ff_bits) {
const SigBit &bit = i.first;
auto it = bit.wire->attributes.find("\\init");
if (it != bit.wire->attributes.end()) {
auto init = it->second[bit.offset];
if (init == RTLIL::S1) {
write_s_buffer(1);
continue;
}
}
// Default flop init is zero
write_s_buffer(0);
}
f << "s";
buffer_str = s_buffer.str();
buffer_size_be = to_big_endian(buffer_str.size());
@ -962,10 +959,7 @@ struct XAigerWriter
if (output_bits.count(b)) {
int o = ordered_outputs.at(b);
int init = 0;
auto it = init_map.find(b);
if (it != init_map.end() && it->second)
init = 1;
int init = 2;
output_lines[o] += stringf("output %d %d %s %d\n", o - GetSize(co_bits), i, log_id(wire), init);
continue;
}