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Merge pull request #648 from YosysHQ/gatecat/nexus-get_pins

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nexus: Add support for get_pins PDC command
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gatecat 2021-03-25 17:36:21 +00:00 committed by GitHub
commit 7b1df27c1a
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1 changed files with 56 additions and 7 deletions
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61
nexus/pdc.cc
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@ -32,32 +32,55 @@ struct TCLEntity
ENTITY_CELL,
ENTITY_PORT,
ENTITY_NET,
ENTITY_PIN,
} type;
IdString name;
IdString pin; // for cell pins only
TCLEntity(EntityType type, IdString name) : type(type), name(name) {}
TCLEntity(EntityType type, IdString name, IdString pin) : type(type), name(name), pin(pin) {}
const std::string &to_string(Context *ctx) { return name.str(ctx); }
CellInfo *get_cell(Context *ctx)
CellInfo *get_cell(Context *ctx) const
{
if (type != ENTITY_CELL)
return nullptr;
return ctx->cells.at(name).get();
}
PortInfo *get_port(Context *ctx)
PortInfo *get_port(Context *ctx) const
{
if (type != ENTITY_PORT)
return nullptr;
return &ctx->ports.at(name);
}
NetInfo *get_net(Context *ctx)
NetInfo *get_net(Context *ctx) const
{
if (type != ENTITY_NET)
if (type == ENTITY_PIN) {
CellInfo *cell = nullptr;
if (ctx->cells.count(name)) {
cell = ctx->cells.at(name).get();
} else {
const std::string &n = name.str(ctx);
auto pos = n.rfind('.');
if (pos == std::string::npos)
return nullptr;
// remove one hierarchy layer due to Radiant weirdness around PLLs etc
IdString stripped_name = ctx->id(n.substr(0, pos));
if (!ctx->cells.count(stripped_name))
return nullptr;
cell = ctx->cells.at(stripped_name).get();
}
if (!cell->ports.count(pin))
return nullptr;
return cell->ports.at(pin).net;
} else if (type == ENTITY_NET) {
return ctx->nets.at(name).get();
} else {
return nullptr;
}
}
};
@ -201,6 +224,8 @@ struct PDCParser
return cmd_get_cells(arguments);
else if (cmd == "get_nets")
return cmd_get_nets(arguments);
else if (cmd == "get_pins")
return cmd_get_pins(arguments);
else if (cmd == "create_clock")
return cmd_create_clock(arguments);
else if (cmd == "ldc_set_location")
@ -286,6 +311,28 @@ struct PDCParser
return cells;
}
TCLValue cmd_get_pins(const std::vector<TCLValue> &arguments)
{
std::vector<TCLEntity> pins;
for (int i = 1; i < int(arguments.size()); i++) {
auto &arg = arguments.at(i);
if (!arg.is_string)
log_error("get_pins expected string arguments (line %d)\n", lineno);
std::string s = arg.str;
if (s.at(0) == '-')
log_error("unsupported argument '%s' to get_pins (line %d)\n", s.c_str(), lineno);
auto pos = s.rfind('/');
if (pos == std::string::npos)
log_error("expected / in cell pin name '%s' (line %d)\n", s.c_str(), lineno);
pins.emplace_back(TCLEntity::ENTITY_PIN, ctx->id(s.substr(0, pos)), ctx->id(s.substr(pos + 1)));
if (pins.back().get_net(ctx) == nullptr) {
log_warning("cell pin '%s' not found\n", s.c_str());
pins.pop_back();
}
}
return pins;
}
TCLValue cmd_create_clock(const std::vector<TCLValue> &arguments)
{
float period = 10;
@ -311,12 +358,14 @@ struct PDCParser
} else {
for (const auto &ety : arg.list) {
NetInfo *net = nullptr;
if (ety.type == TCLEntity::ENTITY_NET)
if (ety.type == TCLEntity::ENTITY_PIN)
net = ety.get_net(ctx);
else if (ety.type == TCLEntity::ENTITY_NET)
net = ctx->nets.at(ety.name).get();
else if (ety.type == TCLEntity::ENTITY_PORT)
net = ctx->ports.at(ety.name).net;
else
log_error("create_clock applies only to cells or IO ports (line %d)\n", lineno);
log_error("create_clock applies only to cells, cell pins, or IO ports (line %d)\n", lineno);
ctx->addClock(net->name, 1000.0f / period);
}
}