aboutsummaryrefslogtreecommitdiffstats
path: root/backends/aiger/xaiger.cc
diff options
context:
space:
mode:
Diffstat (limited to 'backends/aiger/xaiger.cc')
-rw-r--r--backends/aiger/xaiger.cc550
1 files changed, 312 insertions, 238 deletions
diff --git a/backends/aiger/xaiger.cc b/backends/aiger/xaiger.cc
index 445103771..05e9678ee 100644
--- a/backends/aiger/xaiger.cc
+++ b/backends/aiger/xaiger.cc
@@ -82,6 +82,7 @@ struct XAigerWriter
dict<SigBit, SigBit> not_map, alias_map;
dict<SigBit, pair<SigBit, SigBit>> and_map;
vector<SigBit> ci_bits, co_bits;
+ dict<SigBit, Cell*> ff_bits;
dict<SigBit, float> arrival_times;
vector<pair<int, int>> aig_gates;
@@ -92,7 +93,7 @@ struct XAigerWriter
dict<SigBit, int> ordered_outputs;
vector<Cell*> box_list;
- bool omode = false;
+ dict<IdString, std::vector<IdString>> box_ports;
int mkgate(int a0, int a1)
{
@@ -140,7 +141,6 @@ struct XAigerWriter
{
pool<SigBit> undriven_bits;
pool<SigBit> unused_bits;
- pool<SigBit> keep_bits;
// promote public wires
for (auto wire : module->wires())
@@ -152,46 +152,38 @@ struct XAigerWriter
if (wire->port_input)
sigmap.add(wire);
+ // promote keep wires
for (auto wire : module->wires())
- {
- bool keep = wire->attributes.count("\\keep");
+ if (wire->get_bool_attribute(ID::keep))
+ sigmap.add(wire);
+
+ for (auto wire : module->wires())
for (int i = 0; i < GetSize(wire); i++)
{
SigBit wirebit(wire, i);
SigBit bit = sigmap(wirebit);
- if (bit.wire) {
- undriven_bits.insert(bit);
- unused_bits.insert(bit);
+ if (bit.wire == nullptr) {
+ if (wire->port_output) {
+ aig_map[wirebit] = (bit == State::S1) ? 1 : 0;
+ output_bits.insert(wirebit);
+ }
+ continue;
}
- if (keep)
- keep_bits.insert(wirebit);
+ undriven_bits.insert(bit);
+ unused_bits.insert(bit);
- if (wire->port_input || keep) {
- if (bit != wirebit)
- alias_map[bit] = wirebit;
- input_bits.insert(wirebit);
- }
+ if (wire->port_input)
+ input_bits.insert(bit);
- if (wire->port_output || keep) {
- if (bit != RTLIL::Sx) {
- if (bit != wirebit)
- alias_map[wirebit] = bit;
- output_bits.insert(wirebit);
- }
- else
- log_debug("Skipping PO '%s' driven by 1'bx\n", log_signal(wirebit));
+ if (wire->port_output) {
+ if (bit != wirebit)
+ alias_map[wirebit] = bit;
+ output_bits.insert(wirebit);
}
}
- }
-
- for (auto bit : input_bits)
- undriven_bits.erase(sigmap(bit));
- for (auto bit : output_bits)
- if (!bit.wire->port_input)
- unused_bits.erase(bit);
// TODO: Speed up toposort -- ultimately we care about
// box ordering, but not individual AIG cells
@@ -207,11 +199,9 @@ struct XAigerWriter
unused_bits.erase(A);
undriven_bits.erase(Y);
not_map[Y] = A;
- if (!holes_mode) {
- toposort.node(cell->name);
- bit_users[A].insert(cell->name);
- bit_drivers[Y].insert(cell->name);
- }
+ toposort.node(cell->name);
+ bit_users[A].insert(cell->name);
+ bit_drivers[Y].insert(cell->name);
continue;
}
@@ -224,89 +214,92 @@ struct XAigerWriter
unused_bits.erase(B);
undriven_bits.erase(Y);
and_map[Y] = make_pair(A, B);
- if (!holes_mode) {
- toposort.node(cell->name);
- bit_users[A].insert(cell->name);
- bit_users[B].insert(cell->name);
- bit_drivers[Y].insert(cell->name);
- }
+ toposort.node(cell->name);
+ bit_users[A].insert(cell->name);
+ bit_users[B].insert(cell->name);
+ bit_drivers[Y].insert(cell->name);
continue;
}
- log_assert(!holes_mode);
+ if (cell->type == "$__ABC9_FF_" &&
+ // The presence of an abc9_mergeability attribute indicates
+ // that we do want to pass this flop to ABC
+ cell->attributes.count("\\abc9_mergeability"))
+ {
+ SigBit D = sigmap(cell->getPort("\\D").as_bit());
+ SigBit Q = sigmap(cell->getPort("\\Q").as_bit());
+ unused_bits.erase(D);
+ undriven_bits.erase(Q);
+ alias_map[Q] = D;
+ auto r YS_ATTRIBUTE(unused) = ff_bits.insert(std::make_pair(D, cell));
+ log_assert(r.second);
+ continue;
+ }
RTLIL::Module* inst_module = module->design->module(cell->type);
- if (inst_module && inst_module->attributes.count("\\abc9_box_id")) {
- abc9_box_seen = true;
-
- if (!holes_mode) {
- toposort.node(cell->name);
- for (const auto &conn : cell->connections()) {
- auto port_wire = inst_module->wire(conn.first);
- if (port_wire->port_input) {
- // Ignore inout for the sake of topographical ordering
- if (port_wire->port_output) continue;
+ if (inst_module) {
+ bool abc9_box = inst_module->attributes.count("\\abc9_box_id");
+ bool abc9_flop = inst_module->get_bool_attribute("\\abc9_flop");
+ if (abc9_box && cell->get_bool_attribute("\\abc9_keep"))
+ abc9_box = false;
+
+ for (const auto &conn : cell->connections()) {
+ auto port_wire = inst_module->wire(conn.first);
+
+ if (abc9_box) {
+ // Ignore inout for the sake of topographical ordering
+ if (port_wire->port_input && !port_wire->port_output)
for (auto bit : sigmap(conn.second))
bit_users[bit].insert(cell->name);
- }
-
if (port_wire->port_output)
for (auto bit : sigmap(conn.second))
bit_drivers[bit].insert(cell->name);
- }
- }
- }
- else {
- bool cell_known = inst_module || cell->known();
- for (const auto &c : cell->connections()) {
- if (c.second.is_fully_const()) continue;
- auto port_wire = inst_module ? inst_module->wire(c.first) : nullptr;
- auto is_input = (port_wire && port_wire->port_input) || !cell_known || cell->input(c.first);
- auto is_output = (port_wire && port_wire->port_output) || !cell_known || cell->output(c.first);
- if (!is_input && !is_output)
- log_error("Connection '%s' on cell '%s' (type '%s') not recognised!\n", log_id(c.first), log_id(cell), log_id(cell->type));
-
- if (is_input) {
- for (auto b : c.second) {
- Wire *w = b.wire;
- if (!w) continue;
- if (!w->port_output || !cell_known) {
- SigBit I = sigmap(b);
- if (I != b)
- alias_map[b] = I;
- output_bits.insert(b);
- unused_bits.erase(b);
- if (!cell_known)
- keep_bits.insert(b);
- }
- }
+ if (!abc9_flop)
+ continue;
}
- if (is_output) {
+
+ if (port_wire->port_output) {
int arrival = 0;
- if (port_wire) {
- auto it = port_wire->attributes.find("\\abc9_arrival");
- if (it != port_wire->attributes.end()) {
- if (it->second.flags != 0)
- log_error("Attribute 'abc9_arrival' on port '%s' of module '%s' is not an integer.\n", log_id(port_wire), log_id(cell->type));
- arrival = it->second.as_int();
- }
+ auto it = port_wire->attributes.find("\\abc9_arrival");
+ if (it != port_wire->attributes.end()) {
+ if (it->second.flags != 0)
+ log_error("Attribute 'abc9_arrival' on port '%s' of module '%s' is not an integer.\n", log_id(port_wire), log_id(cell->type));
+ arrival = it->second.as_int();
}
+ if (arrival)
+ for (auto bit : sigmap(conn.second))
+ arrival_times[bit] = arrival;
+ }
+ }
- for (auto b : c.second) {
- Wire *w = b.wire;
- if (!w) continue;
- input_bits.insert(b);
- SigBit O = sigmap(b);
- if (O != b)
- alias_map[O] = b;
- undriven_bits.erase(O);
+ if (abc9_box) {
+ abc9_box_seen = true;
+ toposort.node(cell->name);
+ continue;
+ }
+ }
- if (arrival)
- arrival_times[b] = arrival;
+ bool cell_known = inst_module || cell->known();
+ for (const auto &c : cell->connections()) {
+ if (c.second.is_fully_const()) continue;
+ auto port_wire = inst_module ? inst_module->wire(c.first) : nullptr;
+ auto is_input = (port_wire && port_wire->port_input) || !cell_known || cell->input(c.first);
+ auto is_output = (port_wire && port_wire->port_output) || !cell_known || cell->output(c.first);
+ if (!is_input && !is_output)
+ log_error("Connection '%s' on cell '%s' (type '%s') not recognised!\n", log_id(c.first), log_id(cell), log_id(cell->type));
+
+ if (is_input)
+ for (auto b : c.second) {
+ Wire *w = b.wire;
+ if (!w) continue;
+ if (!w->port_output || !cell_known) {
+ SigBit I = sigmap(b);
+ if (I != b)
+ alias_map[b] = I;
+ output_bits.insert(b);
}
}
- }
}
//log_warning("Unsupported cell type: %s (%s)\n", log_id(cell->type), log_id(cell));
@@ -346,12 +339,44 @@ struct XAigerWriter
bool blackbox = box_module->get_blackbox_attribute(true /* ignore_wb */);
+ auto r = box_ports.insert(cell->type);
+ if (r.second) {
+ // Make carry in the last PI, and carry out the last PO
+ // since ABC requires it this way
+ IdString carry_in, carry_out;
+ for (const auto &port_name : box_module->ports) {
+ auto w = box_module->wire(port_name);
+ log_assert(w);
+ if (w->get_bool_attribute("\\abc9_carry")) {
+ if (w->port_input) {
+ if (carry_in != IdString())
+ log_error("Module '%s' contains more than one 'abc9_carry' input port.\n", log_id(box_module));
+ carry_in = port_name;
+ }
+ if (w->port_output) {
+ if (carry_out != IdString())
+ log_error("Module '%s' contains more than one 'abc9_carry' output port.\n", log_id(box_module));
+ carry_out = port_name;
+ }
+ }
+ else
+ r.first->second.push_back(port_name);
+ }
+
+ if (carry_in != IdString() && carry_out == IdString())
+ log_error("Module '%s' contains an 'abc9_carry' input port but no output port.\n", log_id(box_module));
+ if (carry_in == IdString() && carry_out != IdString())
+ log_error("Module '%s' contains an 'abc9_carry' output port but no input port.\n", log_id(box_module));
+ if (carry_in != IdString()) {
+ r.first->second.push_back(carry_in);
+ r.first->second.push_back(carry_out);
+ }
+ }
+
// Fully pad all unused input connections of this box cell with S0
// Fully pad all undriven output connections of this box cell with anonymous wires
- // NB: Assume box_module->ports are sorted alphabetically
- // (as RTLIL::Module::fixup_ports() would do)
- for (const auto &port_name : box_module->ports) {
- RTLIL::Wire* w = box_module->wire(port_name);
+ for (auto port_name : r.first->second) {
+ auto w = box_module->wire(port_name);
log_assert(w);
auto it = cell->connections_.find(port_name);
if (w->port_input) {
@@ -366,7 +391,7 @@ struct XAigerWriter
cell->setPort(port_name, rhs);
}
- for (auto b : rhs.bits()) {
+ for (auto b : rhs) {
SigBit I = sigmap(b);
if (b == RTLIL::Sx)
b = State::S0;
@@ -377,7 +402,7 @@ struct XAigerWriter
alias_map[b] = I;
}
co_bits.emplace_back(b);
- unused_bits.erase(b);
+ unused_bits.erase(I);
}
}
if (w->port_output) {
@@ -397,65 +422,53 @@ struct XAigerWriter
}
for (const auto &b : rhs.bits()) {
- ci_bits.emplace_back(b);
SigBit O = sigmap(b);
if (O != b)
alias_map[O] = b;
+ ci_bits.emplace_back(b);
undriven_bits.erase(O);
- input_bits.erase(b);
}
}
}
+
+ // Connect <cell>.abc9_ff.Q (inserted by abc9_map.v) as the last input to the flop box
+ if (box_module->get_bool_attribute("\\abc9_flop")) {
+ SigSpec rhs = module->wire(stringf("%s.abc9_ff.Q", cell->name.c_str()));
+ if (rhs.empty())
+ log_error("'%s.abc9_ff.Q' is not a wire present in module '%s'.\n", log_id(cell), log_id(module));
+
+ for (auto b : rhs) {
+ SigBit I = sigmap(b);
+ if (b == RTLIL::Sx)
+ b = State::S0;
+ else if (I != b) {
+ if (I == RTLIL::Sx)
+ alias_map[b] = State::S0;
+ else
+ alias_map[b] = I;
+ }
+ co_bits.emplace_back(b);
+ unused_bits.erase(I);
+ }
+ }
+
box_list.emplace_back(cell);
}
// TODO: Free memory from toposort, bit_drivers, bit_users
}
- for (auto bit : input_bits) {
- if (!output_bits.count(bit))
- continue;
- RTLIL::Wire *wire = bit.wire;
- // If encountering an inout port, or a keep-ed wire, then create a new wire
- // with $inout.out suffix, make it a PO driven by the existing inout, and
- // inherit existing inout's drivers
- if ((wire->port_input && wire->port_output && !undriven_bits.count(bit))
- || keep_bits.count(bit)) {
- RTLIL::IdString wire_name = stringf("$%s$inout.out", wire->name.c_str());
- RTLIL::Wire *new_wire = module->wire(wire_name);
- if (!new_wire)
- new_wire = module->addWire(wire_name, GetSize(wire));
- SigBit new_bit(new_wire, bit.offset);
- module->connect(new_bit, bit);
- if (not_map.count(bit)) {
- auto a = not_map.at(bit);
- not_map[new_bit] = a;
- }
- else if (and_map.count(bit)) {
- auto a = and_map.at(bit);
- and_map[new_bit] = a;
- }
- else if (alias_map.count(bit)) {
- auto a = alias_map.at(bit);
- alias_map[new_bit] = a;
- }
- else
- alias_map[new_bit] = bit;
- output_bits.erase(bit);
- output_bits.insert(new_bit);
- }
- }
-
+ for (auto bit : input_bits)
+ undriven_bits.erase(bit);
+ for (auto bit : output_bits)
+ unused_bits.erase(sigmap(bit));
for (auto bit : unused_bits)
undriven_bits.erase(bit);
- if (!undriven_bits.empty() && !holes_mode) {
- undriven_bits.sort();
- for (auto bit : undriven_bits) {
- log_warning("Treating undriven bit %s.%s like $anyseq.\n", log_id(module), log_signal(bit));
- input_bits.insert(bit);
- }
- log_warning("Treating a total of %d undriven bits in %s like $anyseq.\n", GetSize(undriven_bits), log_id(module));
+ // Make all undriven bits a primary input
+ for (auto bit : undriven_bits) {
+ input_bits.insert(bit);
+ undriven_bits.erase(bit);
}
if (holes_mode) {
@@ -467,25 +480,27 @@ struct XAigerWriter
input_bits.sort(sort_by_port_id());
output_bits.sort(sort_by_port_id());
}
- else {
- input_bits.sort();
- output_bits.sort();
- }
-
- not_map.sort();
- and_map.sort();
aig_map[State::S0] = 0;
aig_map[State::S1] = 1;
- for (auto bit : input_bits) {
+ for (const auto &bit : input_bits) {
aig_m++, aig_i++;
log_assert(!aig_map.count(bit));
aig_map[bit] = 2*aig_m;
}
- for (auto bit : ci_bits) {
+ for (const auto &i : ff_bits) {
+ const Cell *cell = i.second;
+ const SigBit &q = sigmap(cell->getPort("\\Q"));
+ aig_m++, aig_i++;
+ log_assert(!aig_map.count(q));
+ aig_map[q] = 2*aig_m;
+ }
+
+ for (auto &bit : ci_bits) {
aig_m++, aig_i++;
+ log_assert(!aig_map.count(bit));
aig_map[bit] = 2*aig_m;
}
@@ -494,15 +509,16 @@ struct XAigerWriter
aig_outputs.push_back(bit2aig(bit));
}
- if (output_bits.empty()) {
- output_bits.insert(State::S0);
- omode = true;
- }
-
- for (auto bit : output_bits) {
+ for (const auto &bit : output_bits) {
ordered_outputs[bit] = aig_o++;
aig_outputs.push_back(bit2aig(bit));
}
+
+ for (auto &i : ff_bits) {
+ const SigBit &d = i.first;
+ aig_o++;
+ aig_outputs.push_back(aig_map.at(d));
+ }
}
void write_aiger(std::ostream &f, bool ascii_mode)
@@ -564,7 +580,6 @@ struct XAigerWriter
f << "c";
- log_assert(!output_bits.empty());
auto write_buffer = [](std::stringstream &buffer, int i32) {
int32_t i32_be = to_big_endian(i32);
buffer.write(reinterpret_cast<const char*>(&i32_be), sizeof(i32_be));
@@ -572,14 +587,14 @@ struct XAigerWriter
std::stringstream h_buffer;
auto write_h_buffer = std::bind(write_buffer, std::ref(h_buffer), std::placeholders::_1);
write_h_buffer(1);
- log_debug("ciNum = %d\n", GetSize(input_bits) + GetSize(ci_bits));
- write_h_buffer(input_bits.size() + ci_bits.size());
- log_debug("coNum = %d\n", GetSize(output_bits) + GetSize(co_bits));
- write_h_buffer(output_bits.size() + GetSize(co_bits));
- log_debug("piNum = %d\n", GetSize(input_bits));
- write_h_buffer(input_bits.size());
- log_debug("poNum = %d\n", GetSize(output_bits));
- write_h_buffer(output_bits.size());
+ log_debug("ciNum = %d\n", GetSize(input_bits) + GetSize(ff_bits) + GetSize(ci_bits));
+ write_h_buffer(input_bits.size() + ff_bits.size() + ci_bits.size());
+ log_debug("coNum = %d\n", GetSize(output_bits) + GetSize(ff_bits) + GetSize(co_bits));
+ write_h_buffer(output_bits.size() + GetSize(ff_bits) + GetSize(co_bits));
+ log_debug("piNum = %d\n", GetSize(input_bits) + GetSize(ff_bits));
+ write_h_buffer(input_bits.size() + ff_bits.size());
+ log_debug("poNum = %d\n", GetSize(output_bits) + GetSize(ff_bits));
+ write_h_buffer(output_bits.size() + ff_bits.size());
log_debug("boxNum = %d\n", GetSize(box_list));
write_h_buffer(box_list.size());
@@ -595,7 +610,7 @@ struct XAigerWriter
//for (auto bit : output_bits)
// write_o_buffer(0);
- if (!box_list.empty()) {
+ if (!box_list.empty() || !ff_bits.empty()) {
RTLIL::Module *holes_module = module->design->addModule("$__holes__");
log_assert(holes_module);
@@ -609,35 +624,23 @@ struct XAigerWriter
IdString derived_name = orig_box_module->derive(module->design, cell->parameters);
RTLIL::Module* box_module = module->design->module(derived_name);
if (box_module->has_processes())
- log_error("ABC9 box '%s' contains processes!\n", box_module->name.c_str());
+ Pass::call_on_module(module->design, box_module, "proc");
- int box_inputs = 0, box_outputs = 0;
auto r = cell_cache.insert(std::make_pair(derived_name, nullptr));
Cell *holes_cell = r.first->second;
if (r.second && box_module->get_bool_attribute("\\whitebox")) {
holes_cell = holes_module->addCell(cell->name, cell->type);
holes_cell->parameters = cell->parameters;
r.first->second = holes_cell;
-
- // Since Module::derive() will create a new module, there
- // is a chance that the ports will be alphabetically ordered
- // again, which is a problem when carry-chains are involved.
- // Inherit the port ordering from the original module here...
- // (and set the port_id below, when iterating through those)
- log_assert(GetSize(box_module->ports) == GetSize(orig_box_module->ports));
- box_module->ports = orig_box_module->ports;
}
- // NB: Assume box_module->ports are sorted alphabetically
- // (as RTLIL::Module::fixup_ports() would do)
- int box_port_id = 1;
- for (const auto &port_name : box_module->ports) {
+ int box_inputs = 0, box_outputs = 0;
+ for (auto port_name : box_ports.at(cell->type)) {
RTLIL::Wire *w = box_module->wire(port_name);
log_assert(w);
- if (r.second)
- w->port_id = box_port_id++;
RTLIL::Wire *holes_wire;
RTLIL::SigSpec port_sig;
+
if (w->port_input)
for (int i = 0; i < GetSize(w); i++) {
box_inputs++;
@@ -655,9 +658,9 @@ struct XAigerWriter
box_outputs += GetSize(w);
for (int i = 0; i < GetSize(w); i++) {
if (GetSize(w) == 1)
- holes_wire = holes_module->addWire(stringf("%s.%s", cell->name.c_str(), log_id(w->name)));
+ holes_wire = holes_module->addWire(stringf("$abc%s.%s", cell->name.c_str(), log_id(w->name)));
else
- holes_wire = holes_module->addWire(stringf("%s.%s[%d]", cell->name.c_str(), log_id(w->name), i));
+ holes_wire = holes_module->addWire(stringf("$abc%s.%s[%d]", cell->name.c_str(), log_id(w->name), i));
holes_wire->port_output = true;
holes_wire->port_id = port_id++;
holes_module->ports.push_back(holes_wire->name);
@@ -675,6 +678,23 @@ struct XAigerWriter
}
}
+ // For flops only, create an extra 1-bit input that drives a new wire
+ // called "<cell>.abc9_ff.Q" that is used below
+ if (box_module->get_bool_attribute("\\abc9_flop")) {
+ log_assert(holes_cell);
+
+ box_inputs++;
+ Wire *holes_wire = holes_module->wire(stringf("\\i%d", box_inputs));
+ if (!holes_wire) {
+ holes_wire = holes_module->addWire(stringf("\\i%d", box_inputs));
+ holes_wire->port_input = true;
+ holes_wire->port_id = port_id++;
+ holes_module->ports.push_back(holes_wire->name);
+ }
+ Wire *w = holes_module->addWire(stringf("%s.abc9_ff.Q", cell->name.c_str()));
+ holes_module->connect(w, holes_wire);
+ }
+
write_h_buffer(box_inputs);
write_h_buffer(box_outputs);
write_h_buffer(box_module->attributes.at("\\abc9_box_id").as_int());
@@ -683,13 +703,48 @@ struct XAigerWriter
std::stringstream r_buffer;
auto write_r_buffer = std::bind(write_buffer, std::ref(r_buffer), std::placeholders::_1);
- write_r_buffer(0);
+ 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) {
+ const SigBit &d = i.first;
+ const Cell *cell = i.second;
+
+ int mergeability = cell->attributes.at(ID(abc9_mergeability)).as_int();
+ log_assert(mergeability > 0);
+ write_r_buffer(mergeability);
+
+ Const init = cell->attributes.at(ID(abc9_init));
+ log_assert(GetSize(init) == 1);
+ if (init == State::S1)
+ write_s_buffer(1);
+ else if (init == State::S0)
+ write_s_buffer(0);
+ else {
+ log_assert(init == State::Sx);
+ write_s_buffer(0);
+ }
+
+ write_i_buffer(arrival_times.at(d, 0));
+ //write_o_buffer(0);
+ }
+
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());
+ f << "s";
+ buffer_str = s_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) {
log_push();
@@ -697,34 +752,64 @@ struct XAigerWriter
//holes_module->fixup_ports();
holes_module->check();
- holes_module->design->selection_stack.emplace_back(false);
- RTLIL::Selection& sel = holes_module->design->selection_stack.back();
- sel.select(holes_module);
-
- Pass::call(holes_module->design, "flatten -wb");
-
// Cannot techmap/aigmap/check all lib_whitebox-es outside of write_xaiger
// since boxes may contain parameters in which case `flatten` would have
// created a new $paramod ...
- Pass::call(holes_module->design, "techmap");
- Pass::call(holes_module->design, "aigmap");
- for (auto cell : holes_module->cells())
- if (!cell->type.in("$_NOT_", "$_AND_"))
+ Pass::call_on_module(holes_module->design, holes_module, "flatten -wb; techmap; aigmap");
+
+ dict<SigSig, SigSig> replace;
+ for (auto it = holes_module->cells_.begin(); it != holes_module->cells_.end(); ) {
+ auto cell = it->second;
+ if (cell->type.in("$_DFF_N_", "$_DFF_NN0_", "$_DFF_NN1_", "$_DFF_NP0_", "$_DFF_NP1_",
+ "$_DFF_P_", "$_DFF_PN0_", "$_DFF_PN1", "$_DFF_PP0_", "$_DFF_PP1_")) {
+ SigBit D = cell->getPort("\\D");
+ SigBit Q = cell->getPort("\\Q");
+ // Remove the DFF cell from what needs to be a combinatorial box
+ it = holes_module->cells_.erase(it);
+ Wire *port;
+ if (GetSize(Q.wire) == 1)
+ port = holes_module->wire(stringf("$abc%s", Q.wire->name.c_str()));
+ else
+ port = holes_module->wire(stringf("$abc%s[%d]", Q.wire->name.c_str(), Q.offset));
+ log_assert(port);
+ // Prepare to replace "assign <port> = DFF.Q;" with "assign <port> = DFF.D;"
+ // in order to extract the combinatorial control logic that feeds the box
+ // (i.e. clock enable, synchronous reset, etc.)
+ replace.insert(std::make_pair(SigSig(port,Q), SigSig(port,D)));
+ // Since `flatten` above would have created wires named "<cell>.Q",
+ // extract the pre-techmap cell name
+ auto pos = Q.wire->name.str().rfind(".");
+ log_assert(pos != std::string::npos);
+ IdString driver = Q.wire->name.substr(0, pos);
+ // And drive the signal that was previously driven by "DFF.Q" (typically
+ // used to implement clock-enable functionality) with the "<cell>.abc9_ff.Q"
+ // wire (which itself is driven an input port) we inserted above
+ Wire *currQ = holes_module->wire(stringf("%s.abc9_ff.Q", driver.c_str()));
+ log_assert(currQ);
+ holes_module->connect(Q, currQ);
+ continue;
+ }
+ else if (!cell->type.in("$_NOT_", "$_AND_"))
log_error("Whitebox contents cannot be represented as AIG. Please verify whiteboxes are synthesisable.\n");
+ ++it;
+ }
- holes_module->design->selection_stack.pop_back();
+ for (auto &conn : holes_module->connections_) {
+ auto it = replace.find(conn);
+ if (it != replace.end())
+ conn = it->second;
+ }
// Move into a new (temporary) design so that "clean" will only
// operate (and run checks on) this one module
RTLIL::Design *holes_design = new RTLIL::Design;
- holes_module->design->modules_.erase(holes_module->name);
+ module->design->modules_.erase(holes_module->name);
holes_design->add(holes_module);
- Pass::call(holes_design, "clean -purge");
+ Pass::call(holes_design, "opt -purge");
std::stringstream a_buffer;
XAigerWriter writer(holes_module, true /* holes_mode */);
writer.write_aiger(a_buffer, false /*ascii_mode*/);
-
delete holes_design;
f << "a";
@@ -755,19 +840,20 @@ struct XAigerWriter
//f.write(buffer_str.data(), buffer_str.size());
f << stringf("Generated by %s\n", yosys_version_str);
+
+ module->design->scratchpad_set_int("write_xaiger.num_ands", and_map.size());
+ module->design->scratchpad_set_int("write_xaiger.num_wires", aig_map.size());
+ module->design->scratchpad_set_int("write_xaiger.num_inputs", input_bits.size());
+ module->design->scratchpad_set_int("write_xaiger.num_outputs", output_bits.size());
}
- void write_map(std::ostream &f, bool verbose_map)
+ void write_map(std::ostream &f)
{
dict<int, string> input_lines;
dict<int, string> output_lines;
- dict<int, string> wire_lines;
for (auto wire : module->wires())
{
- //if (!verbose_map && wire->name[0] == '$')
- // continue;
-
SigSpec sig = sigmap(wire);
for (int i = 0; i < GetSize(wire); i++)
@@ -781,17 +867,10 @@ struct XAigerWriter
if (output_bits.count(b)) {
int o = ordered_outputs.at(b);
- output_lines[o] += stringf("output %d %d %s\n", o - GetSize(co_bits), i, log_id(wire));
+ int init = 2;
+ output_lines[o] += stringf("output %d %d %s %d\n", o - GetSize(co_bits), i, log_id(wire), init);
continue;
}
-
- if (verbose_map) {
- 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));
- }
}
}
@@ -805,15 +884,9 @@ struct XAigerWriter
f << stringf("box %d %d %s\n", box_count++, 0, log_id(cell->name));
output_lines.sort();
- if (omode)
- output_lines[State::S0] = "output 0 0 $__dummy__\n";
for (auto &it : output_lines)
f << it.second;
log_assert(output_lines.size() == output_bits.size());
-
- wire_lines.sort();
- for (auto &it : wire_lines)
- f << it.second;
}
};
@@ -825,8 +898,10 @@ struct XAigerBackend : public Backend {
log("\n");
log(" write_xaiger [options] [filename]\n");
log("\n");
- log("Write the current design to an XAIGER file. The design must be flattened and\n");
- log("all unsupported cells will be converted into psuedo-inputs and pseudo-outputs.\n");
+ log("Write the top module (according to the (* top *) attribute or if only one module\n");
+ log("is currently selected) to an XAIGER file. Any non $_NOT_, $_AND_, $_ABC9_FF_, or");
+ log("non (* abc9_box_id *) cells will be converted into psuedo-inputs and\n");
+ log("pseudo-outputs.\n");
log("\n");
log(" -ascii\n");
log(" write ASCII version of AIGER format\n");
@@ -834,14 +909,10 @@ struct XAigerBackend : public Backend {
log(" -map <filename>\n");
log(" write an extra file with port and box symbols\n");
log("\n");
- log(" -vmap <filename>\n");
- log(" like -map, but more verbose\n");
- log("\n");
}
void execute(std::ostream *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
{
bool ascii_mode = false;
- bool verbose_map = false;
std::string map_filename;
log_header(design, "Executing XAIGER backend.\n");
@@ -857,11 +928,6 @@ struct XAigerBackend : public Backend {
map_filename = args[++argidx];
continue;
}
- if (map_filename.empty() && args[argidx] == "-vmap" && argidx+1 < args.size()) {
- map_filename = args[++argidx];
- verbose_map = true;
- continue;
- }
break;
}
extra_args(f, filename, args, argidx, !ascii_mode);
@@ -871,6 +937,14 @@ struct XAigerBackend : public Backend {
if (top_module == nullptr)
log_error("Can't find top module in current design!\n");
+ if (!design->selected_whole_module(top_module))
+ log_cmd_error("Can't handle partially selected module %s!\n", log_id(top_module));
+
+ if (!top_module->processes.empty())
+ log_error("Found unmapped processes in module %s: unmapped processes are not supported in XAIGER backend!\n", log_id(top_module));
+ if (!top_module->memories.empty())
+ log_error("Found unmapped memories in module %s: unmapped memories are not supported in XAIGER backend!\n", log_id(top_module));
+
XAigerWriter writer(top_module);
writer.write_aiger(*f, ascii_mode);
@@ -879,7 +953,7 @@ struct XAigerBackend : public Backend {
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, verbose_map);
+ writer.write_map(mapf);
}
}
} XAigerBackend;
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-28 01:04:53 +0000