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/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
* Copyright (C) 2012 Martin Schmölzer <martin@schmoelzer.at>
*
* 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/log.h"
#include "kernel/register.h"
#include "kernel/sigtools.h"
#include "kernel/consteval.h"
#include "kernel/celltypes.h"
#include "fsmdata.h"
#include <string>
#include <iostream>
#include <fstream>
/**
* Convert a signal into a KISS-compatible textual representation.
*/
std::string kiss_convert_signal(const RTLIL::SigSpec &sig) {
if (!sig.is_fully_const()) {
throw 0;
}
return sig.as_const().as_string();
}
/**
* Create a KISS2 file from a cell.
*
* The destination file name is taken from the fsm_export attribute if present,
* e.g. (* fsm_export="filename.kiss2" *). If this attribute is not present,
* the file name will be assembled from the module and cell names.
*
* @param module pointer to module which contains the FSM cell.
* @param cell pointer to the FSM cell which should be exported.
*/
void write_kiss2(struct RTLIL::Module *module, struct RTLIL::Cell *cell) {
std::map<RTLIL::IdString, RTLIL::Const>::iterator attr_it;
FsmData fsm_data;
FsmData::transition_t tr;
std::ofstream kiss_file;
std::string kiss_name;
size_t i;
attr_it = cell->attributes.find("\\fsm_export");
if (attr_it != cell->attributes.end() && attr_it->second.str != "") {
kiss_name.assign(attr_it->second.str);
}
else {
kiss_name.assign(module->name);
kiss_name.append('-' + cell->name + ".kiss2");
}
log("\n");
log("Exporting FSM `%s' from module `%s' to file `%s'.\n",
cell->name.c_str(),
module->name.c_str(),
kiss_name.c_str());
kiss_file.open(kiss_name, std::ios::out | std::ios::trunc);
if (!kiss_file.is_open()) {
log_error("Could not open file \"%s\" with write access.\n", kiss_name.c_str());
}
fsm_data.copy_from_cell(cell);
kiss_file << ".i " << std::dec << fsm_data.num_inputs << std::endl;
kiss_file << ".o " << std::dec << fsm_data.num_outputs << std::endl;
kiss_file << ".p " << std::dec << fsm_data.transition_table.size() << std::endl;
kiss_file << ".s " << std::dec << fsm_data.state_table.size() << std::endl;
kiss_file << ".r s" << std::dec << fsm_data.reset_state << std::endl;
for (i = 0; i < fsm_data.transition_table.size(); i++) {
tr = fsm_data.transition_table[i];
try {
kiss_file << kiss_convert_signal(tr.ctrl_in) << ' ';
kiss_file << 's' << tr.state_in << ' ';
kiss_file << 's' << tr.state_out << ' ';
kiss_file << kiss_convert_signal(tr.ctrl_out) << std::endl;
}
catch (int) {
kiss_file.close();
log_error("exporting an FSM input or output signal failed.\n");
}
}
kiss_file.close();
}
/**
* Exports Finite State Machines in the design to one file per FSM. Currently,
* only the KISS2 file format is supported.
*/
struct FsmExportPass : public Pass {
FsmExportPass() : Pass("fsm_export") {
}
virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
{
std::map<RTLIL::IdString, RTLIL::Const>::iterator attr_it;
std::string arg;
bool flag_noauto = false;
size_t argidx;
log_header("Executing FSM_EXPORT pass (exporting FSMs in KISS2 file format).\n");
for (argidx = 1; argidx < args.size(); argidx++) {
arg = args[argidx];
if (arg == "-noauto") {
flag_noauto = true;
continue;
}
break;
}
extra_args(args, argidx, design);
for (auto &mod_it : design->modules)
for (auto &cell_it : mod_it.second->cells)
if (cell_it.second->type == "$fsm") {
attr_it = cell_it.second->attributes.find("\\fsm_export");
if (!flag_noauto || (attr_it != cell_it.second->attributes.end())) {
write_kiss2(mod_it.second, cell_it.second);
}
}
}
} FsmExportPass;
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