102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
/*
|
|
* 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"
|
|
|
|
USING_YOSYS_NAMESPACE
|
|
PRIVATE_NAMESPACE_BEGIN
|
|
|
|
struct SingletonPass : public Pass {
|
|
SingletonPass() : Pass("singleton", "create singleton modules") { }
|
|
virtual void help()
|
|
{
|
|
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
|
|
log("\n");
|
|
log(" singleton [selection]\n");
|
|
log("\n");
|
|
log("By default, a module that is instantiated by several other modules is only\n");
|
|
log("kept once in the design. This preserves the original modularity of the design\n");
|
|
log("and reduces the overall size of the design in memory. But it prevents certain\n");
|
|
log("optimizations and other operations on the design. This pass creates singleton\n");
|
|
log("modules for all selected cells. The created modules are marked with the\n");
|
|
log("'singleton' attribute.\n");
|
|
log("\n");
|
|
log("This commands only operates on modules that by themself have the 'singleton'\n");
|
|
log("attribute set (the 'top' module is a singleton implicitly).\n");
|
|
log("\n");
|
|
}
|
|
virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
|
|
{
|
|
log_header(design, "Executing SINGLETON pass (creating singleton modules).\n");
|
|
|
|
size_t argidx;
|
|
for (argidx = 1; argidx < args.size(); argidx++)
|
|
{
|
|
// if (args[argidx] == "-check") {
|
|
// flag_check = true;
|
|
// continue;
|
|
// }
|
|
}
|
|
extra_args(args, argidx, design);
|
|
|
|
bool did_something = true;
|
|
int singleton_cnt = 0;
|
|
|
|
while (did_something)
|
|
{
|
|
did_something = false;
|
|
|
|
for (auto module : design->selected_modules())
|
|
{
|
|
if (!module->get_bool_attribute("\\singleton") && !module->get_bool_attribute("\\top"))
|
|
continue;
|
|
|
|
for (auto cell : module->selected_cells())
|
|
{
|
|
auto tmod = design->module(cell->type);
|
|
|
|
if (tmod == nullptr)
|
|
continue;
|
|
|
|
if (tmod->get_bool_attribute("\\blackbox"))
|
|
continue;
|
|
|
|
if (tmod->get_bool_attribute("\\singleton"))
|
|
continue;
|
|
|
|
cell->type = module->name.str() + "." + log_id(cell->name);
|
|
log("Creating singleton '%s'.\n", log_id(cell->type));
|
|
|
|
auto smod = tmod->clone();
|
|
smod->name = cell->type;
|
|
smod->set_bool_attribute("\\singleton");
|
|
design->add(smod);
|
|
|
|
did_something = true;
|
|
singleton_cnt++;
|
|
}
|
|
}
|
|
}
|
|
|
|
log("Created %d singleton modules.\n", singleton_cnt);
|
|
}
|
|
} SingletonPass;
|
|
|
|
PRIVATE_NAMESPACE_END
|