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Added "singleton" pass

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Clifford Wolf 2015-11-07 19:10:43 +01:00
parent 3ad742056b
commit 1ec6429bad
2 changed files with 102 additions and 0 deletions
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1
passes/hierarchy/Makefile.inc
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@ -1,4 +1,5 @@
OBJS += passes/hierarchy/hierarchy.o
OBJS += passes/hierarchy/singleton.o
OBJS += passes/hierarchy/submod.o

101
passes/hierarchy/singleton.cc Normal file
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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"
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("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