mirror of https://github.com/YosysHQ/yosys.git
104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
|
/*
|
||
|
|
* 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
|
||
|
|
|
||
|
|
void assertpmux_worker(Cell *pmux, bool flag_noinit)
|
||
|
|
{
|
||
|
|
Module *module = pmux->module;
|
||
|
|
|
||
|
|
log("Adding assert for $pmux cell %s.%s.\n", log_id(module), log_id(pmux));
|
||
|
|
|
||
|
|
int swidth = pmux->getParam("\\S_WIDTH").as_int();
|
||
|
|
int cntbits = ceil_log2(swidth+1);
|
||
|
|
|
||
|
|
SigSpec sel = pmux->getPort("\\S");
|
||
|
|
SigSpec cnt(State::S0, cntbits);
|
||
|
|
|
||
|
|
for (int i = 0; i < swidth; i++)
|
||
|
|
cnt = module->Add(NEW_ID, cnt, sel[i]);
|
||
|
|
|
||
|
|
SigSpec assert_a = module->Le(NEW_ID, cnt, SigSpec(1, cntbits));
|
||
|
|
SigSpec assert_en = State::S1;
|
||
|
|
|
||
|
|
if (flag_noinit) {
|
||
|
|
Cell *initstate_cell = module->addCell(NEW_ID, "$initstate");
|
||
|
|
SigSpec initstate_sig = module->addWire(NEW_ID);
|
||
|
|
initstate_cell->setPort("\\Y", initstate_sig);
|
||
|
|
assert_en = module->LogicNot(NEW_ID, initstate_sig);
|
||
|
|
}
|
||
|
|
|
||
|
|
Cell *assert_cell = module->addAssert(NEW_ID, assert_a, assert_en);
|
||
|
|
|
||
|
|
if (pmux->attributes.count("\\src") != 0)
|
||
|
|
assert_cell->attributes["\\src"] = pmux->attributes.at("\\src");
|
||
|
|
}
|
||
|
|
|
||
|
|
struct AssertpmuxPass : public Pass {
|
||
|
|
AssertpmuxPass() : Pass("assertpmux", "convert internal signals to module ports") { }
|
||
|
|
virtual void help()
|
||
|
|
{
|
||
|
|
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
|
||
|
|
log("\n");
|
||
|
|
log(" assertpmux [options] [selection]\n");
|
||
|
|
log("\n");
|
||
|
|
log("This command adds asserts to the design that assert that all parallel muxes\n");
|
||
|
|
log("($pmux cells) have a maximum of one of their inputs enable at any time.\n");
|
||
|
|
log("\n");
|
||
|
|
log(" -noinit\n");
|
||
|
|
log(" do not enforce the pmux condition during the init state\n");
|
||
|
|
log("\n");
|
||
|
|
}
|
||
|
|
virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
|
||
|
|
{
|
||
|
|
bool flag_noinit = false;
|
||
|
|
|
||
|
|
log_header(design, "Executing ASSERTPMUX pass (add asserts for $pmux cells).\n");
|
||
|
|
|
||
|
|
size_t argidx;
|
||
|
|
for (argidx = 1; argidx < args.size(); argidx++)
|
||
|
|
{
|
||
|
|
if (args[argidx] == "-noinit") {
|
||
|
|
flag_noinit = true;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
extra_args(args, argidx, design);
|
||
|
|
|
||
|
|
for (auto module : design->selected_modules())
|
||
|
|
{
|
||
|
|
vector<Cell*> pmux_cells;
|
||
|
|
|
||
|
|
for (auto cell : module->selected_cells())
|
||
|
|
if (cell->type == "$pmux")
|
||
|
|
pmux_cells.push_back(cell);
|
||
|
|
|
||
|
|
for (auto cell : pmux_cells)
|
||
|
|
assertpmux_worker(cell, flag_noinit);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
} AssertpmuxPass;
|
||
|
|
|
||
|
|
PRIVATE_NAMESPACE_END
|