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nexus/pdc: Parse simple clock constraints

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2020-12-02 09:34:11 +00:00
parent 868902fbdf
commit 5a291e4622
1 changed files with 61 additions and 0 deletions
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61
nexus/pdc.cc
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@ -199,6 +199,10 @@ struct PDCParser
return cmd_get_ports(arguments); return cmd_get_ports(arguments);
else if (cmd == "get_cells") else if (cmd == "get_cells")
return cmd_get_cells(arguments); return cmd_get_cells(arguments);
else if (cmd == "get_nets")
return cmd_get_nets(arguments);
else if (cmd == "create_clock")
return cmd_create_clock(arguments);
else if (cmd == "ldc_set_location") else if (cmd == "ldc_set_location")
return cmd_ldc_set_location(arguments); return cmd_ldc_set_location(arguments);
else if (cmd == "ldc_set_port") else if (cmd == "ldc_set_port")
@ -229,6 +233,25 @@ struct PDCParser
return args; return args;
} }
TCLValue cmd_get_nets(const std::vector<TCLValue> &arguments)
{
std::vector<TCLEntity> nets;
for (int i = 1; i < int(arguments.size()); i++) {
auto &arg = arguments.at(i);
if (!arg.is_string)
log_error("get_nets expected string arguments (line %d)\n", lineno);
std::string s = arg.str;
if (s.at(0) == '-')
log_error("unsupported argument '%s' to get_nets (line %d)\n", s.c_str(), lineno);
IdString id = ctx->id(s);
if (ctx->nets.count(id) || ctx->net_aliases.count(id))
nets.emplace_back(TCLEntity::ENTITY_NET, ctx->net_aliases.count(id) ? ctx->net_aliases.at(id) : id);
else
log_warning("get_nets argument '%s' matched no objects.\n", s.c_str());
}
return nets;
}
TCLValue cmd_get_ports(const std::vector<TCLValue> &arguments) TCLValue cmd_get_ports(const std::vector<TCLValue> &arguments)
{ {
std::vector<TCLEntity> ports; std::vector<TCLEntity> ports;
@ -263,6 +286,44 @@ struct PDCParser
return cells; return cells;
} }
TCLValue cmd_create_clock(const std::vector<TCLValue> &arguments)
{
float period = 10;
for (int i = 1; i < int(arguments.size()); i++) {
auto &arg = arguments.at(i);
if (arg.is_string) {
std::string s = arg.str;
if (s == "-period") {
i++;
auto &val = arguments.at(i);
if (!val.is_string)
log_error("expecting string argument to -period (line %d)\n", lineno);
try {
period = std::stof(val.str);
} catch (std::exception &e) {
log_error("invalid argument '%s' to -period (line %d)\n", val.str.c_str(), lineno);
}
} else if (s == "-name") {
i++;
} else {
log_error("unsupported argument '%s' to create_clock\n", s.c_str());
}
} else {
for (const auto &ety : arg.list) {
NetInfo *net = nullptr;
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);
ctx->addClock(net->name, 1000.0f / period);
}
}
}
return std::string{};
}
TCLValue cmd_ldc_set_location(const std::vector<TCLValue> &arguments) TCLValue cmd_ldc_set_location(const std::vector<TCLValue> &arguments)
{ {
std::string site; std::string site;