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abc9_ops: use TimingInfo for -prep_{lut,box} too

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This commit is contained in:
Eddie Hung 2020-02-14 11:41:43 -08:00
parent cda4acb544
commit 3ea5506f81
3 changed files with 65 additions and 97 deletions
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20
kernel/timinginfo.h
View file

@ -148,24 +148,8 @@ struct TimingInfo
}
}
int delay(IdString module_name, const SigBit &src, const SigBit &dst) const {
auto it = data.find(module_name);
if (it == data.end())
return 0;
return it->second.comb.at(BitBit(src,dst), 0);
}
int arrival(IdString module_name, const SigBit &src) const {
auto it = data.find(module_name);
if (it == data.end())
return 0;
return it->second.arrival.at(src, 0);
}
int required(IdString module_name, const SigBit &dst) const {
auto it = data.find(module_name);
if (it == data.end())
return 0;
return it->second.required.at(dst, 0);
}
decltype(data)::const_iterator find (RTLIL::IdString module_name) const { return data.find(module_name); }
decltype(data)::const_iterator end () const { return data.end(); }
};
YOSYS_NAMESPACE_END

125
passes/techmap/abc9_ops.cc
View file

@ -424,8 +424,8 @@ void prep_delays(RTLIL::Design *design, bool dff_mode)
std::stringstream ss;
for (auto module : design->modules()) {
auto it = timing.data.find(module->name);
if (it == timing.data.end())
auto it = timing.find(module->name);
if (it == timing.end())
continue;
const auto &t = it->second;
@ -539,35 +539,31 @@ void prep_delays(RTLIL::Design *design, bool dff_mode)
void prep_lut(RTLIL::Design *design, int maxlut)
{
const TimingInfo timing(design);
std::vector<std::tuple<int, IdString, int, std::vector<int>>> table;
for (auto module : design->modules()) {
auto it = module->attributes.find(ID(abc9_lut));
if (it == module->attributes.end())
continue;
auto jt = timing.find(module->name);
if (jt == timing.end())
continue;
SigBit o;
std::vector<int> specify;
for (auto cell : module->cells()) {
if (cell->type != ID($specify2))
continue;
log_assert(cell->getParam(ID(SRC_WIDTH)) == 1);
log_assert(cell->getParam(ID(DST_WIDTH)) == 1);
SigBit s = cell->getPort(ID(SRC));
SigBit d = cell->getPort(ID(DST));
log_assert(s.wire->port_input);
log_assert(d.wire->port_output);
auto &t = jt->second;
for (const auto &i : t.comb) {
auto &d = i.first.second;
log_dump(o, d);
if (o == SigBit())
o = d;
else
log_assert(o == d);
// TODO: Don't assume that each specify entry with the destination 'o'
// describes a unique LUT input
int rise_max = cell->getParam(ID(T_RISE_MAX)).as_int();
int fall_max = cell->getParam(ID(T_FALL_MAX)).as_int();
int max = std::max(rise_max,fall_max);
if (max < 0)
log_error("Module '%s' contains specify cell '%s' with T_{RISE,FALL}_MAX < 0.\n", log_id(module), log_id(cell));
specify.push_back(max);
}
else if (o != d)
log_error("(* abc9_lut *) module '%s' with has more than one output.\n", log_id(module));
specify.push_back(i.second);
}
if (maxlut && GetSize(specify) > maxlut)
continue;
// ABC requires non-decreasing LUT input delays
@ -607,14 +603,27 @@ void write_lut(RTLIL::Module *module, const std::string &dst) {
void prep_box(RTLIL::Design *design, bool dff_mode)
{
const TimingInfo timing(design);
std::stringstream ss;
int abc9_box_id = 1;
for (auto module : design->modules()) {
auto it = module->attributes.find(ID(abc9_box_id));
if (it == module->attributes.end())
continue;
abc9_box_id = std::max(abc9_box_id, it->second.as_int());
}
dict<IdString,std::vector<IdString>> box_ports;
for (auto module : design->modules()) {
auto abc9_flop = module->get_bool_attribute(ID(abc9_flop));
if (abc9_flop) {
auto r = module->attributes.insert(ID(abc9_box_id));
if (!r.second)
continue;
r.first->second = abc9_box_id++;
if (dff_mode) {
log_dump(module->name);
int num_inputs = 0, num_outputs = 0;
for (auto port_name : module->ports) {
auto wire = module->wire(port_name);
@ -624,10 +633,6 @@ void prep_box(RTLIL::Design *design, bool dff_mode)
}
log_assert(num_outputs == 1);
auto r = module->attributes.insert(ID(abc9_box_id));
if (r.second)
r.first->second = abc9_box_id++;
ss << log_id(module) << " " << r.first->second.as_int();
ss << " " << (module->get_bool_attribute(ID::whitebox) ? "1" : "0");
ss << " " << num_inputs+1 << " " << num_outputs << std::endl;
@ -680,12 +685,12 @@ void prep_box(RTLIL::Design *design, bool dff_mode)
else {
if (!module->attributes.erase(ID(abc9_box)))
continue;
}
log_assert(!module->attributes.count(ID(abc9_box_id)));
dict<std::pair<SigBit,SigBit>, std::string> table;
std::vector<SigBit> inputs;
std::vector<SigBit> outputs;
auto r = module->attributes.insert(ID(abc9_box_id));
if (!r.second)
continue;
r.first->second = abc9_box_id++;
}
auto r = box_ports.insert(module->name);
if (r.second) {
@ -712,6 +717,8 @@ void prep_box(RTLIL::Design *design, bool dff_mode)
}
}
std::vector<SigBit> inputs;
std::vector<SigBit> outputs;
for (auto port_name : r.first->second) {
auto wire = module->wire(port_name);
if (wire->port_input)
@ -721,47 +728,11 @@ void prep_box(RTLIL::Design *design, bool dff_mode)
for (int i = 0; i < GetSize(wire); i++)
outputs.emplace_back(wire, i);
}
for (auto cell : module->cells()) {
if (cell->type != ID($specify2))
continue;
auto src = cell->getPort(ID(SRC));
auto dst = cell->getPort(ID(DST));
for (const auto &c : src.chunks())
if (!c.wire->port_input)
log_error("Module '%s' contains specify cell '%s' where SRC '%s' is not a module input.\n", log_id(module), log_id(cell), log_signal(src));
for (const auto &c : dst.chunks())
if (!c.wire->port_output)
log_error("Module '%s' contains specify cell '%s' where DST '%s' is not a module output.\n", log_id(module), log_id(cell), log_signal(dst));
int rise_max = cell->getParam(ID(T_RISE_MAX)).as_int();
int fall_max = cell->getParam(ID(T_FALL_MAX)).as_int();
int max = std::max(rise_max,fall_max);
if (max < 0)
log_error("Module '%s' contains specify cell '%s' with T_{RISE,FALL}_MAX < 0.\n", log_id(module), log_id(cell));
if (cell->getParam(ID(FULL)).as_bool()) {
for (auto s : src)
for (auto d : dst) {
auto r = table.insert(std::make_pair(s,d));
log_assert(r.second);
r.first->second = std::to_string(max);
}
}
else {
log_assert(GetSize(src) == GetSize(dst));
for (auto i = 0; i < GetSize(src); i++) {
auto r = table.insert(std::make_pair(src[i],dst[i]));
if (!r.second)
log_error("Module '%s' contains multiple specify cells for SRC '%s' and DST '%s'.\n", log_id(module), log_signal(src[i]), log_signal(dst[i]));
log_assert(r.second);
r.first->second = std::to_string(max);
}
}
}
auto r2 = module->attributes.insert(ID(abc9_box_id));
log_assert(r2.second);
ss << log_id(module) << " " << abc9_box_id;
r2.first->second = abc9_box_id++;
ss << log_id(module) << " " << module->attributes.at(ID(abc9_box_id)).as_int();
ss << " " << (module->get_bool_attribute(ID::whitebox) ? "1" : "0");
ss << " " << GetSize(inputs) << " " << GetSize(outputs) << std::endl;
bool first = true;
ss << "#";
for (const auto &i : inputs) {
@ -775,6 +746,12 @@ void prep_box(RTLIL::Design *design, bool dff_mode)
ss << log_id(i.wire) << "[" << i.offset << "]";
}
ss << std::endl;
auto it = timing.find(module->name);
if (it == timing.end())
log_error("(* abc9_box *) module '%s' has no timing information.\n", log_id(module));
const auto &t = it->second.comb;
for (const auto &o : outputs) {
first = true;
for (const auto &i : inputs) {
@ -782,7 +759,11 @@ void prep_box(RTLIL::Design *design, bool dff_mode)
first = false;
else
ss << " ";
ss << table.at(std::make_pair(i,o), "-");
auto jt = t.find(std::make_pair(i,o));
if (jt == t.end())
ss << "-";
else
ss << jt->second;
}
ss << " # ";
if (GetSize(o.wire) == 1)

17
techlibs/xilinx/abc9_model.v
View file

@ -69,6 +69,7 @@ endmodule
(* abc9_box *)
module \$__ABC9_RAM6 (input A, input [5:0] S, output Y);
specify
(A => Y) = 0;
(S[0] => Y) = 642;
(S[1] => Y) = 631;
(S[2] => Y) = 472;
@ -81,13 +82,15 @@ endmodule
(* abc9_box *)
module \$__ABC9_RAM7 (input A, input [6:0] S, output Y);
specify
(S[0] => Y) = 1028;
(S[1] => Y) = 1017;
(S[2] => Y) = 858;
(S[3] => Y) = 793;
(S[4] => Y) = 624;
(S[5] => Y) = 513;
(S[6] => Y) = 464;
(A => Y) = 0;
// https://github.com/SymbiFlow/prjxray-db/blob/1c85daf1b115da4d27ca83c6b89f53a94de39748/artix7/timings/slicel.sdf#L867
(S[0] => Y) = 642 + 223 /* to cross F7BMUX */ + 174 /* CMUX */;
(S[1] => Y) = 631 + 223 /* to cross F7BMUX */ + 174 /* CMUX */;
(S[2] => Y) = 472 + 223 /* to cross F7BMUX */ + 174 /* CMUX */;
(S[3] => Y) = 407 + 223 /* to cross F7BMUX */ + 174 /* CMUX */;
(S[4] => Y) = 238 + 223 /* to cross F7BMUX */ + 174 /* CMUX */;
(S[5] => Y) = 127 + 223 /* to cross F7BMUX */ + 174 /* CMUX */;
(S[6] => Y) = 0 + 296 /* to select F7BMUX */ + 174 /* CMUX */;
endspecify
endmodule