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WIP stubber

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This commit is contained in:
Emil J. Tywoniak 2025-07-07 14:53:36 +02:00
parent b85bd37360
commit 024c9b022b
1 changed files with 80 additions and 1 deletions
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81
passes/cmds/box_derive.cc
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@ -17,10 +17,61 @@
* *
*/ */
#include "kernel/yosys.h" #include "kernel/yosys.h"
#include "kernel/celltypes.h"
USING_YOSYS_NAMESPACE USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN PRIVATE_NAMESPACE_BEGIN
struct LibertyStubber {
CellTypes ct;
CellTypes ct_ff;
LibertyStubber() {
ct.setup();
ct.setup_internals_ff();
}
void liberty_prefix(std::ostream& f)
{
f << "library (yosys) {\n";
f << "\tinput_threshold_pct_fall : 50;\n";
f << "\tinput_threshold_pct_rise : 50;\n";
f << "\toutput_threshold_pct_fall : 50;\n";
f << "\toutput_threshold_pct_rise : 50;\n";
f << "\tslew_lower_threshold_pct_fall : 1;\n";
f << "\tslew_lower_threshold_pct_rise : 1;\n";
f << "\tslew_upper_threshold_pct_fall : 99;\n";
f << "\tslew_upper_threshold_pct_rise : 99;\n";
}
void liberty_suffix(std::ostream& f)
{
f << "}\n";
}
void liberty_cell(Module* base, Module* derived, std::ostream& f)
{
auto base_name = base->name.str().substr(1);
auto derived_name = derived->name.str().substr(1);
if (!ct.cell_types.count(base_name)) {
log_debug("skip skeleton for %s\n", base_name.c_str());
return;
}
auto& base_type = ct.cell_types[base_name];
f << "\tcell (" << derived_name << ") {\n";
for (auto x : derived->ports) {
bool is_input = base_type.inputs.count(x);
bool is_output = base_type.outputs.count(x);
f << "\t\tpin (" << RTLIL::unescape_id(x.str()) << ") {\n";
if (is_input && !is_output) {
f << "\t\t\tdirection : input;\n";
} else if (!is_input && is_output) {
f << "\t\t\tdirection : output;\n";
} else {
f << "\t\t\tdirection : inout;\n";
}
f << "\t\t}\n";
}
f << "\t}\n";
}
};
struct BoxDerivePass : Pass { struct BoxDerivePass : Pass {
BoxDerivePass() : Pass("box_derive", "derive box modules") {} BoxDerivePass() : Pass("box_derive", "derive box modules") {}
void help() override void help() override
@ -51,6 +102,8 @@ struct BoxDerivePass : Pass {
log(" replaces the internal Yosys naming scheme in which the names of derived\n"); log(" replaces the internal Yosys naming scheme in which the names of derived\n");
log(" modules start with '$paramod$')\n"); log(" modules start with '$paramod$')\n");
log("\n"); log("\n");
log(" -liberty <file>\n"); // TODO
log("\n");
log(" -apply\n"); log(" -apply\n");
log(" use the derived modules\n"); log(" use the derived modules\n");
log("\n"); log("\n");
@ -62,12 +115,17 @@ struct BoxDerivePass : Pass {
size_t argidx; size_t argidx;
IdString naming_attr; IdString naming_attr;
IdString base_name; IdString base_name;
std::string liberty_filename;
std::ofstream* liberty_file = new std::ofstream;
bool apply_mode; bool apply_mode;
for (argidx = 1; argidx < args.size(); argidx++) { for (argidx = 1; argidx < args.size(); argidx++) {
if (args[argidx] == "-naming_attr" && argidx + 1 < args.size()) if (args[argidx] == "-naming_attr" && argidx + 1 < args.size())
naming_attr = RTLIL::escape_id(args[++argidx]); naming_attr = RTLIL::escape_id(args[++argidx]);
else if (args[argidx] == "-base" && argidx + 1 < args.size()) else if (args[argidx] == "-base" && argidx + 1 < args.size())
base_name = RTLIL::escape_id(args[++argidx]); base_name = RTLIL::escape_id(args[++argidx]);
else if (args[argidx] == "-liberty" && argidx + 1 < args.size())
liberty_filename = args[++argidx];
else if (args[argidx] == "-apply") else if (args[argidx] == "-apply")
apply_mode = true; apply_mode = true;
else else
@ -75,6 +133,14 @@ struct BoxDerivePass : Pass {
} }
extra_args(args, argidx, d); extra_args(args, argidx, d);
if (liberty_filename.size()) {
liberty_file->open(liberty_filename.c_str());
if (liberty_file->fail()) {
delete liberty_file;
log_error("Can't open file `%s' for writing: %s\n", liberty_filename.c_str(), strerror(errno));
}
}
Module *base_override = nullptr; Module *base_override = nullptr;
if (!base_name.empty()) { if (!base_name.empty()) {
base_override = d->module(base_name); base_override = d->module(base_name);
@ -83,6 +149,10 @@ struct BoxDerivePass : Pass {
} }
dict<std::pair<RTLIL::IdString, dict<RTLIL::IdString, RTLIL::Const>>, Module*> done; dict<std::pair<RTLIL::IdString, dict<RTLIL::IdString, RTLIL::Const>>, Module*> done;
LibertyStubber stubber = {};
if (liberty_file)
stubber.liberty_prefix(*liberty_file);
for (auto module : d->selected_modules()) { for (auto module : d->selected_modules()) {
for (auto cell : module->selected_cells()) { for (auto cell : module->selected_cells()) {
@ -114,13 +184,22 @@ struct BoxDerivePass : Pass {
d->rename(derived, new_name); d->rename(derived, new_name);
} }
if (liberty_file)
stubber.liberty_cell(base, derived, *liberty_file);
done[index] = derived; done[index] = derived;
} }
if (apply_mode) if (apply_mode) {
cell->type = done[index]->name; cell->type = done[index]->name;
cell->parameters.clear();
}
} }
} }
if (liberty_file) {
stubber.liberty_suffix(*liberty_file);
delete liberty_file;
}
} }
} BoxDerivePass; } BoxDerivePass;