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Added an option to control LUT and FF packing

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Signed-off-by: Maciej Kurc <mkurc@antmicro.com>
This commit is contained in:
Maciej Kurc 2021-11-19 09:28:19 +01:00
parent d97f93ee88
commit 086bcf0615
2 changed files with 8 additions and 1 deletions
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3
nexus/main.cc
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@ -51,6 +51,7 @@ po::options_description NexusCommandHandler::getArchOptions()
specific.add_options()("fasm", po::value<std::string>(), "fasm file to write");
specific.add_options()("pdc", po::value<std::string>(), "physical constraints file");
specific.add_options()("no-post-place-opt", "disable post-place repacking (debugging use only)");
specific.add_options()("no-pack-lutff", "disable packing (clustering) LUTs and FFs together");
return specific;
}
@ -76,6 +77,8 @@ std::unique_ptr<Context> NexusCommandHandler::createContext(dict<std::string, Pr
auto ctx = std::unique_ptr<Context>(new Context(chipArgs));
if (vm.count("no-post-place-opt"))
ctx->settings[ctx->id("no_post_place_opt")] = Property::State::S1;
if (vm.count("no-pack-lutff"))
ctx->settings[ctx->id("no_pack_lutff")] = Property::State::S1;
return ctx;
}

6
nexus/pack.cc
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@ -2395,7 +2395,11 @@ struct NexusPacker
pack_luts();
pack_ip();
handle_iologic();
pack_lutffs();
if (!bool_or_default(ctx->settings, ctx->id("no_pack_lutff"))) {
pack_lutffs();
}
promote_globals();
place_globals();
generate_constraints();