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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.
*
*/
#ifndef COST_H
#define COST_H
#include <kernel/yosys.h>
YOSYS_NAMESPACE_BEGIN
int get_cell_cost(RTLIL::Cell *cell, dict<RTLIL::IdString, int> *mod_cost_cache = nullptr);
int get_cell_cost(RTLIL::IdString type, const dict<RTLIL::IdString, RTLIL::Const> ¶meters = dict<RTLIL::IdString, RTLIL::Const>(),
RTLIL::Design *design = nullptr, dict<RTLIL::IdString, int> *mod_cost_cache = nullptr)
{
static dict<RTLIL::IdString, int> gate_cost = {
{ "$_BUF_", 1 },
{ "$_NOT_", 2 },
{ "$_AND_", 4 },
{ "$_NAND_", 4 },
{ "$_OR_", 4 },
{ "$_NOR_", 4 },
{ "$_XOR_", 8 },
{ "$_XNOR_", 8 },
{ "$_AOI3_", 6 },
{ "$_OAI3_", 6 },
{ "$_AOI4_", 8 },
{ "$_OAI4_", 8 },
{ "$_MUX_", 4 }
};
if (gate_cost.count(type))
return gate_cost.at(type);
if (parameters.empty() && design && design->module(type))
{
RTLIL::Module *mod = design->module(type);
if (mod->attributes.count("\\cost"))
return mod->attributes.at("\\cost").as_int();
dict<RTLIL::IdString, int> local_mod_cost_cache;
if (mod_cost_cache == nullptr)
mod_cost_cache = &local_mod_cost_cache;
if (mod_cost_cache->count(mod->name))
return mod_cost_cache->at(mod->name);
int module_cost = 1;
for (auto c : mod->cells())
module_cost += get_cell_cost(c, mod_cost_cache);
(*mod_cost_cache)[mod->name] = module_cost;
return module_cost;
}
log_warning("Can't determine cost of %s cell (%d parameters).\n", log_id(type), GetSize(parameters));
return 1;
}
int get_cell_cost(RTLIL::Cell *cell, dict<RTLIL::IdString, int> *mod_cost_cache)
{
return get_cell_cost(cell->type, cell->parameters, cell->module->design, mod_cost_cache);
}
YOSYS_NAMESPACE_END
#endif
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