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/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2012 Clifford Wolf <clifford@clifford.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/yosys.h"
#include "kernel/sigtools.h"
USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN
struct InsbufPass : public Pass {
InsbufPass() : Pass("insbuf", "insert buffer cells for connected wires") { }
virtual void help()
{
log("\n");
log(" insbuf [options] [selection]\n");
log("\n");
log("Insert buffer cells into the design for directly connected wires.\n");
log("\n");
log(" -buf <celltype> <in-portname> <out-portname>\n");
log(" Use the given cell type instead of $_BUF_. (Notice that the next\n");
log(" call to \"clean\" will remove all $_BUF_ in the design.)\n");
log("\n");
}
virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
{
log_header(design, "Executing INSBUF pass (insert buffer cells for connected wires).\n");
std::string celltype = "$_BUF_", in_portname = "\\A", out_portname = "\\Y";
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++)
{
std::string arg = args[argidx];
if (arg == "-buf" && argidx+3 < args.size()) {
celltype = args[++argidx];
in_portname = args[++argidx];
out_portname = args[++argidx];
continue;
}
break;
}
extra_args(args, argidx, design);
for (auto module : design->selected_modules())
{
std::vector<RTLIL::SigSig> new_connections;
for (auto &conn : module->connections())
{
RTLIL::SigSig new_conn;
for (int i = 0; i < GetSize(conn.first); i++)
{
SigBit lhs = conn.first[i];
SigBit rhs = conn.second[i];
if (lhs.wire && !design->selected(module, lhs.wire)) {
new_conn.first.append(lhs);
new_conn.second.append(rhs);
continue;
}
Cell *cell = module->addCell(NEW_ID, RTLIL::escape_id(celltype));
cell->setPort(RTLIL::escape_id(in_portname), rhs);
cell->setPort(RTLIL::escape_id(out_portname), lhs);
log("Added %s.%s: %s -> %s\n", log_id(module), log_id(cell), log_signal(rhs), log_signal(lhs));
}
if (GetSize(new_conn.first))
new_connections.push_back(new_conn);
}
module->new_connections(new_connections);
}
}
} InsbufPass;
PRIVATE_NAMESPACE_END
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