/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2018 Miodrag Milanovic <micko@yosyshq.com>
*
* 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 AnlogicEqnPass : public Pass {
AnlogicEqnPass() : Pass("anlogic_eqn", "Anlogic: Calculate equations for luts") { }
void help() override
{
log("\n");
log(" anlogic_eqn [selection]\n");
log("\n");
log("Calculate equations for luts since bitstream generator depends on it.\n");
log("\n");
}
Const init2eqn(Const init, int inputs)
{
std::string init_bits = init.as_string();
const char* names[] = { "A" , "B", "C", "D", "E", "F" };
std::string eqn;
int width = (int)pow(2,inputs);
for(int i=0;i<width;i++)
{
if (init_bits[width-1-i]=='1')
{
eqn += "(";
for(int j=0;j<inputs;j++)
{
if (i & (1<<j))
eqn += names[j];
else
eqn += std::string("~") + names[j];
if (j!=(inputs-1)) eqn += "*";
}
eqn += ")+";
}
}
if (eqn.empty()) return Const("0");
eqn = eqn.substr(0, eqn.length()-1);
return Const(eqn);
}
void execute(std::vector<std::string> args, RTLIL::Design *design) override
{
log_header(design, "Executing ANLOGIC_EQN pass (calculate equations for luts).\n");
extra_args(args, args.size(), design);
int cnt = 0;
for (auto module : design->selected_modules())
{
for (auto cell : module->selected_cells())
{
if (cell->type == ID(AL_MAP_LUT1))
{
cell->setParam(ID(EQN), init2eqn(cell->getParam(ID::INIT),1));
cnt++;
}
if (cell->type == ID(AL_MAP_LUT2))
{
cell->setParam(ID(EQN), init2eqn(cell->getParam(ID::INIT),2));
cnt++;
}
if (cell->type == ID(AL_MAP_LUT3))
{
cell->setParam(ID(EQN), init2eqn(cell->getParam(ID::INIT),3));
cnt++;
}
if (cell->type == ID(AL_MAP_LUT4))
{
cell->setParam(ID(EQN), init2eqn(cell->getParam(ID::INIT),4));
cnt++;
}
if (cell->type == ID(AL_MAP_LUT5))
{
cell->setParam(ID(EQN), init2eqn(cell->getParam(ID::INIT),5));
cnt++;
}
if (cell->type == ID(AL_MAP_LUT6))
{
cell->setParam(ID(EQN), init2eqn(cell->getParam(ID::INIT),6));
cnt++;
}
}
}
log_header(design, "Updated %d of AL_MAP_LUT* elements with equation.\n", cnt);
}
} AnlogicEqnPass;
PRIVATE_NAMESPACE_END