mirror of https://github.com/YosysHQ/yosys.git
114 lines
3.0 KiB
C++
114 lines
3.0 KiB
C++
/*
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* yosys -- Yosys Open SYnthesis Suite
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*
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* Copyright (C) 2018 Miodrag Milanovic <micko@yosyshq.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#include "kernel/yosys.h"
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#include "kernel/sigtools.h"
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USING_YOSYS_NAMESPACE
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PRIVATE_NAMESPACE_BEGIN
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struct AnlogicEqnPass : public Pass {
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AnlogicEqnPass() : Pass("anlogic_eqn", "Anlogic: Calculate equations for luts") { }
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void help() override
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{
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log("\n");
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log(" anlogic_eqn [selection]\n");
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log("\n");
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log("Calculate equations for luts since bitstream generator depends on it.\n");
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log("\n");
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}
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Const init2eqn(Const init, int inputs)
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{
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std::string init_bits = init.as_string();
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const char* names[] = { "A" , "B", "C", "D", "E", "F" };
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std::string eqn;
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int width = (int)pow(2,inputs);
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for(int i=0;i<width;i++)
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{
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if (init_bits[width-1-i]=='1')
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{
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eqn += "(";
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for(int j=0;j<inputs;j++)
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{
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if (i & (1<<j))
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eqn += names[j];
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else
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eqn += std::string("~") + names[j];
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if (j!=(inputs-1)) eqn += "*";
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}
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eqn += ")+";
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}
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}
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if (eqn.empty()) return Const("0");
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eqn = eqn.substr(0, eqn.length()-1);
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return Const(eqn);
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}
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void execute(std::vector<std::string> args, RTLIL::Design *design) override
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{
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log_header(design, "Executing ANLOGIC_EQN pass (calculate equations for luts).\n");
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extra_args(args, args.size(), design);
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int cnt = 0;
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for (auto module : design->selected_modules())
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{
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for (auto cell : module->selected_cells())
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{
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if (cell->type == ID(AL_MAP_LUT1))
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{
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cell->setParam(ID(EQN), init2eqn(cell->getParam(ID::INIT),1));
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cnt++;
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}
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if (cell->type == ID(AL_MAP_LUT2))
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{
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cell->setParam(ID(EQN), init2eqn(cell->getParam(ID::INIT),2));
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cnt++;
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}
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if (cell->type == ID(AL_MAP_LUT3))
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{
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cell->setParam(ID(EQN), init2eqn(cell->getParam(ID::INIT),3));
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cnt++;
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}
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if (cell->type == ID(AL_MAP_LUT4))
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{
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cell->setParam(ID(EQN), init2eqn(cell->getParam(ID::INIT),4));
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cnt++;
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}
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if (cell->type == ID(AL_MAP_LUT5))
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{
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cell->setParam(ID(EQN), init2eqn(cell->getParam(ID::INIT),5));
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cnt++;
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}
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if (cell->type == ID(AL_MAP_LUT6))
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{
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cell->setParam(ID(EQN), init2eqn(cell->getParam(ID::INIT),6));
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cnt++;
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}
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}
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}
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log_header(design, "Updated %d of AL_MAP_LUT* elements with equation.\n", cnt);
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}
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} AnlogicEqnPass;
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PRIVATE_NAMESPACE_END
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