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icell_liberty: start

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Emil J. Tywoniak 2025-07-16 23:15:43 +02:00
parent 4d8032ba01
commit c768d5e8d2
2 changed files with 139 additions and 0 deletions
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1
passes/cmds/Makefile.inc
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@ -58,3 +58,4 @@ OBJS += passes/cmds/test_select.o
OBJS += passes/cmds/timeest.o
OBJS += passes/cmds/linecoverage.o
OBJS += passes/cmds/publish.o
OBJS += passes/cmds/icell_liberty.o

138
passes/cmds/icell_liberty.cc Normal file
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@ -0,0 +1,138 @@
/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2024 Martin Povišer <povik@cutebit.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "kernel/yosys.h"
#include "kernel/celltypes.h"
USING_YOSYS_NAMESPACE
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 IcellLiberty : Pass {
IcellLiberty() : Pass("icell_liberty", "derive box modules") {}
void help() override
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" icell_liberty <liberty_file>\n"); // TODO
log("\n");
log("\n");
}
void execute(std::vector<std::string> args, RTLIL::Design *d) override
{
log_header(d, "Executing ICELL_LIBERTY pass.\n");
size_t argidx;
IdString naming_attr;
std::string liberty_filename;
std::ofstream* liberty_file = new std::ofstream;
for (argidx = 1; argidx < args.size(); argidx++) {
break;
}
if (argidx < args.size())
liberty_filename = args[argidx++];
else
log_error("no Liberty filename specified\n");
// 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));
}
}
pool<RTLIL::IdString> done;
LibertyStubber stubber = {};
if (liberty_file)
stubber.liberty_prefix(*liberty_file);
for (auto module : d->selected_modules()) {
for (auto cell : module->selected_cells()) {
Module *inst_module = d->module(cell->type);
if (!inst_module || !inst_module->get_blackbox_attribute())
continue;
Module *base = inst_module;
if (!done.count(base->name)) {
stubber.liberty_cell(base, base, *liberty_file);
done.insert(base->name);
}
}
}
if (liberty_file) {
stubber.liberty_suffix(*liberty_file);
delete liberty_file;
}
}
} IcellLiberty;
PRIVATE_NAMESPACE_END