83 lines
3.4 KiB
C++
83 lines
3.4 KiB
C++
/*
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* nextpnr -- Next Generation Place and Route
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*
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* Copyright (C) 2018 Clifford Wolf <clifford@symbioticeda.com>
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* Copyright (C) 2018 David Shah <david@symbioticeda.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#include "pcf.h"
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#include <sstream>
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#include "log.h"
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NEXTPNR_NAMESPACE_BEGIN
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// Read a w
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// Apply PCF constraints to a pre-packing design
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bool apply_pcf(Context *ctx, std::string filename, std::istream &in)
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{
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try {
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if (!in)
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log_error("failed to open PCF file\n");
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std::string line;
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int lineno = 0;
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while (std::getline(in, line)) {
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lineno++;
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size_t cstart = line.find("#");
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if (cstart != std::string::npos)
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line = line.substr(0, cstart);
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std::stringstream ss(line);
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std::vector<std::string> words;
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std::string tmp;
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while (ss >> tmp)
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words.push_back(tmp);
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if (words.size() == 0)
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continue;
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std::string cmd = words.at(0);
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if (cmd == "set_io") {
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size_t args_end = 1;
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while (args_end < words.size() && words.at(args_end).at(0) == '-')
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args_end++;
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if (args_end >= words.size() - 1)
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log_error("expected PCF syntax 'set_io cell pin' (on line %d)\n", lineno);
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std::string cell = words.at(args_end);
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std::string pin = words.at(args_end + 1);
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auto fnd_cell = ctx->cells.find(ctx->id(cell));
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if (fnd_cell == ctx->cells.end()) {
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log_warning("unmatched constraint '%s' (on line %d)\n", cell.c_str(), lineno);
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} else {
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BelId pin_bel = ctx->getPackagePinBel(pin);
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if (pin_bel == BelId())
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log_error("package does not have a pin named '%s' (on line %d)\n", pin.c_str(), lineno);
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if (fnd_cell->second->attrs.count(ctx->id("BEL")))
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log_error("duplicate pin constraint on '%s' (on line %d)\n", cell.c_str(), lineno);
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fnd_cell->second->attrs[ctx->id("BEL")] = ctx->getBelName(pin_bel).str(ctx);
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log_info("constrained '%s' to bel '%s'\n", cell.c_str(),
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fnd_cell->second->attrs[ctx->id("BEL")].c_str());
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}
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} else {
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log_error("unsupported PCF command '%s' (on line %d)\n", cmd.c_str(), lineno);
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}
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}
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ctx->settings.emplace(ctx->id("input/pcf"), filename);
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return true;
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} catch (log_execution_error_exception) {
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return false;
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}
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}
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NEXTPNR_NAMESPACE_END
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