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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
struct CellCosts
{
static const dict<RTLIL::IdString, int>& default_gate_cost() {
static const dict<RTLIL::IdString, int> db = {
{ ID($_BUF_), 1 },
{ ID($_NOT_), 2 },
{ ID($_AND_), 4 },
{ ID($_NAND_), 4 },
{ ID($_OR_), 4 },
{ ID($_NOR_), 4 },
{ ID($_ANDNOT_), 4 },
{ ID($_ORNOT_), 4 },
{ ID($_XOR_), 5 },
{ ID($_XNOR_), 5 },
{ ID($_AOI3_), 6 },
{ ID($_OAI3_), 6 },
{ ID($_AOI4_), 7 },
{ ID($_OAI4_), 7 },
{ ID($_MUX_), 4 },
{ ID($_NMUX_), 4 }
};
return db;
}
static const dict<RTLIL::IdString, int>& cmos_gate_cost() {
static const dict<RTLIL::IdString, int> db = {
{ ID($_BUF_), 1 },
{ ID($_NOT_), 2 },
{ ID($_AND_), 6 },
{ ID($_NAND_), 4 },
{ ID($_OR_), 6 },
{ ID($_NOR_), 4 },
{ ID($_ANDNOT_), 6 },
{ ID($_ORNOT_), 6 },
{ ID($_XOR_), 12 },
{ ID($_XNOR_), 12 },
{ ID($_AOI3_), 6 },
{ ID($_OAI3_), 6 },
{ ID($_AOI4_), 8 },
{ ID($_OAI4_), 8 },
{ ID($_MUX_), 12 },
{ ID($_NMUX_), 10 }
};
return db;
}
dict<RTLIL::IdString, int> mod_cost_cache;
const dict<RTLIL::IdString, int> *gate_cost = nullptr;
Design *design = nullptr;
int get(RTLIL::IdString type) const
{
if (gate_cost && gate_cost->count(type))
return gate_cost->at(type);
log_warning("Can't determine cost of %s cell.\n", log_id(type));
return 1;
}
int get(RTLIL::Cell *cell)
{
if (gate_cost && gate_cost->count(cell->type))
return gate_cost->at(cell->type);
if (design && design->module(cell->type) && cell->parameters.empty())
{
RTLIL::Module *mod = design->module(cell->type);
if (mod->attributes.count(ID(cost)))
return mod->attributes.at(ID(cost)).as_int();
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(c);
mod_cost_cache[mod->name] = module_cost;
return module_cost;
}
log_warning("Can't determine cost of %s cell (%d parameters).\n", log_id(cell->type), GetSize(cell->parameters));
return 1;
}
};
YOSYS_NAMESPACE_END
#endif
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