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/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2018 David Shah <david@symbioticeda.com>
*
* 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 <sstream>
#include "log.h"
NEXTPNR_NAMESPACE_BEGIN
bool Arch::applyLPF(std::string filename, std::istream &in)
{
auto isempty = [](const std::string &str) {
return std::all_of(str.begin(), str.end(), [](char c) { return isblank(c); });
};
auto strip_quotes = [](const std::string &str) {
if (str.at(0) == '"') {
NPNR_ASSERT(str.back() == '"');
return str.substr(1, str.size() - 2);
} else {
return str;
}
};
try {
if (!in)
log_error("failed to open LPF file\n");
std::string line;
std::string linebuf;
while (std::getline(in, line)) {
size_t cstart = line.find('#');
if (cstart != std::string::npos)
line = line.substr(0, cstart);
if (isempty(line))
continue;
linebuf += line;
// Look for a command up to a semicolon
size_t scpos = linebuf.find(';');
while (scpos != std::string::npos) {
std::string command = linebuf.substr(0, scpos);
// Split command into words
std::stringstream ss(command);
std::vector<std::string> words;
std::string tmp;
while (ss >> tmp)
words.push_back(tmp);
if (words.size() >= 0) {
std::string verb = words.at(0);
if (verb == "BLOCK" || verb == "SYSCONFIG") {
log_warning(" ignoring unsupported LPF command '%s'\n", command.c_str());
} else if (verb == "FREQUENCY") {
std::string etype = words.at(1);
if (etype == "PORT" || etype == "NET") {
std::string target = words.at(2);
if (target.at(0) == '\"') {
NPNR_ASSERT(target.back() == '\"');
target = target.substr(1, target.length() - 2);
}
float freq = std::stof(words.at(3));
std::string unit = words.at(4);
if (unit == "MHz")
;
else if (unit == "kHz")
freq /= 1.0e3;
else if (unit == "Hz")
freq /= 1.0e6;
else
log_error("unsupported frequency unit '%s'\n", unit.c_str());
addClock(id(target), freq);
} else {
log_warning(" ignoring unsupported LPF command '%s %s'\n", command.c_str(),
etype.c_str());
}
} else if (verb == "LOCATE") {
NPNR_ASSERT(words.at(1) == "COMP");
std::string cell = strip_quotes(words.at(2));
NPNR_ASSERT(words.at(3) == "SITE");
auto fnd_cell = cells.find(id(cell));
if (fnd_cell == cells.end()) {
log_warning("unmatched LPF 'LOCATE COMP' '%s'\n", cell.c_str());
} else {
fnd_cell->second->attrs[id("LOC")] = strip_quotes(words.at(4));
}
} else if (verb == "IOBUF") {
NPNR_ASSERT(words.at(1) == "PORT");
std::string cell = strip_quotes(words.at(2));
auto fnd_cell = cells.find(id(cell));
if (fnd_cell == cells.end()) {
log_warning("unmatched LPF 'IOBUF PORT' '%s'\n", cell.c_str());
} else {
for (size_t i = 3; i < words.size(); i++) {
std::string setting = words.at(i);
size_t eqpos = setting.find('=');
NPNR_ASSERT(eqpos != std::string::npos);
std::string key = setting.substr(0, eqpos), value = setting.substr(eqpos + 1);
fnd_cell->second->attrs[id(key)] = value;
}
}
}
}
linebuf = linebuf.substr(scpos + 1);
scpos = linebuf.find(';');
}
}
if (!isempty(linebuf))
log_error("unexpected end of LPF file\n");
settings.emplace(id("input/lpf"), filename);
return true;
} catch (log_execution_error_exception) {
return false;
}
}
NEXTPNR_NAMESPACE_END
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