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Add new `bbox_derive` command for blackbox derivation

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Martin Povišer 2024-04-10 15:20:01 +02:00 committed by Emil J. Tywoniak
parent 2631c7e918
commit 4c000d3aba
2 changed files with 91 additions and 0 deletions
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1
passes/cmds/Makefile.inc
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@ -48,3 +48,4 @@ OBJS += passes/cmds/clean_zerowidth.o
OBJS += passes/cmds/xprop.o OBJS += passes/cmds/xprop.o
OBJS += passes/cmds/dft_tag.o OBJS += passes/cmds/dft_tag.o
OBJS += passes/cmds/future.o OBJS += passes/cmds/future.o
OBJS += passes/cmds/bbox_derive.o

90
passes/cmds/bbox_derive.cc Normal file
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@ -0,0 +1,90 @@
/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2024 Martin Povišer <povik@cutebit.org>
*
* 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
struct BboxDerivePass : Pass {
BboxDerivePass() : Pass("bbox_derive", "derive blackbox modules") {}
void help() override
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" bbox_derive [-base <base_module>] [-naming_attr <attr>] [selection]\n");
log("\n");
}
void execute(std::vector<std::string> args, RTLIL::Design *d) override
{
log_header(d, "Executing BBOX_DERIVE pass. (derive modules for blackboxes)\n");
size_t argidx;
IdString naming_attr;
IdString base_name;
for (argidx = 1; argidx < args.size(); argidx++) {
if (args[argidx] == "-naming_attr" && argidx + 1 < args.size())
naming_attr = RTLIL::escape_id(args[++argidx]);
else if (args[argidx] == "-base" && argidx + 1 < args.size())
base_name = RTLIL::escape_id(args[++argidx]);
else
break;
}
extra_args(args, argidx, d);
Module *base_override;
if (!base_name.empty()) {
base_override = d->module(base_name);
if (!base_override)
log_cmd_error("Base module %s not found.\n", log_id(base_name));
}
dict<dict<RTLIL::IdString, RTLIL::Const>, Module*> done;
for (auto module : d->selected_modules()) {
for (auto cell : module->selected_cells()) {
Module *inst_module = d->module(cell->type);
if (!inst_module || !inst_module->get_blackbox_attribute())
continue;
if (cell->parameters.empty() || done.count(cell->parameters))
continue;
Module *base = inst_module;
if (base_override)
base = base_override;
IdString derived_type = base->derive(d, cell->parameters);
Module *derived = d->module(derived_type);
if (!naming_attr.empty() && derived->has_attribute(naming_attr)) {
IdString new_name = RTLIL::escape_id(derived->get_string_attribute(naming_attr));
if (!new_name.isPublic())
log_error("Derived module %s cannot be renamed to private name %s.\n",
log_id(derived), log_id(new_name));
derived->attributes.erase(naming_attr);
d->rename(derived, new_name);
}
done[cell->parameters] = derived;
}
}
}
} BboxDerivePass;
PRIVATE_NAMESPACE_END