Does TritonRoute support all design rules in ISPD 2014/2015 tech files?

Tool: Detailed Routing

Subcategory: Design rule support

Conversation

liangrj2014

We wonder whether TritonRoute support all design rules in ISPD 2014/2015 tech files (https://www.ispd.cc/contests/14/web/benchmarks.html)? Example design rules are as follows:

PROPERTY LEF57_MINSTEP "MINSTEP 0.100 MAXEDGES 1 ;" ;
MINIMUMCUT 2 WIDTH 0.400 ;
MINENCLOSEDAREA 0.30 ;
PROPERTY LEF57_SPACING "SPACING 0.13 PARALLELOVERLAP ;”;

maliberty

We test with ispd 18&19 but not those. 2 is only relevant for pdn and I know we support 3. @osamahammad21 would you check on 1 & 4

refaay

We currently parse for LEF58 rules. We don't parse LEF57 (by looking at /src/odb/src/lefin/lefin.cpp and /src/drt/src/io/io.cpp). I will start a PR for parsing LEF57.

Also, we don't support PARALLELOVERLAP option for LEF58_SPACING in drt according to io.cpp:

case odb::dbTechLayerCutSpacingRule::CutSpacingType::PARALLELOVERLAP:
        logger_->warn(utl::DRT,
                      260,
                      "Unsupported LEF58_SPACING rule for layer {} of type "
                      "PARALLELOVERLAP.",
                      layer->getName());
        break;

We support MAXEDGES for LEF58_MINSTEP as in io.cpp:

for (auto rule : layer->getTechLayerMinStepRules()) {
    auto con = make_unique<frLef58MinStepConstraint>();
    con->setMinStepLength(rule->getMinStepLength());
    con->setMaxEdges(rule->isMaxEdgesValid() ? rule->getMaxEdges() : -1);
    con->setMinAdjacentLength(
        rule->isMinAdjLength1Valid() ? rule->getMinAdjLength1() : -1);
    con->setEolWidth(rule->isNoBetweenEol() ? rule->getEolWidth() : -1);
    tmpLayer->addLef58MinStepConstraint(con.get());
    tech_->addUConstraint(std::move(con));
  }

maliberty

We could add support for new rules if there is strong interest

refaay

Hi @liangrj2014 , we added support for PROPERTY LEF57_MINSTEP & PROPERTY LEF57_SPACING. Also, support for PARALLELOVERLAP will be added soon.

refaay

@liangrj2014 PARALLELOVERLAP is now supported for LEF57_SPACING &LEF58_SPACING properties.