From e0af812180528c45e79291209e2e3726c98b80ae Mon Sep 17 00:00:00 2001 From: Eddie Hung Date: Fri, 10 Jan 2020 12:38:49 -0800 Subject: [PATCH] abc9_ops -prep_times: update comment --- passes/techmap/abc9_ops.cc | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/passes/techmap/abc9_ops.cc b/passes/techmap/abc9_ops.cc index 4d49bb4d2..14b3f6c43 100644 --- a/passes/techmap/abc9_ops.cc +++ b/passes/techmap/abc9_ops.cc @@ -485,9 +485,9 @@ void prep_times(RTLIL::Design *design) continue; if (!inst_module->get_blackbox_attribute()) continue; - // Flop inputs cannot have required times - // (required time should be captured by flop box) - // TODO: enforce this + // Only flop boxes are not combinatorial and may have required times, + // however those times are captured by this flop box, no need to + // add delay boxes if (cell->attributes.count(ID(abc9_box_id))) continue; boxes.emplace_back(cell); @@ -566,6 +566,7 @@ void write_box(RTLIL::Module *module, const std::string &src, const std::string ofs << "$__ABC9_DELAY@" << d << " " << ABC9_DELAY_BASE_ID + d << " 0 1 1" << std::endl; ofs << d << std::endl; } + module->attributes.erase(it); } ofs.close(); -- 2.30.2