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drt: add -disable_auto_taper_ndr_nets flag to detailed_route #1

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drt: add -disable_auto_taper_ndr_nets flag to detailed_route #1

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2 changes: 2 additions & 0 deletions src/drt/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,7 @@ detailed_route
[-save_guide_updates]
[-repair_pdn_vias layer]
[-single_step_dr]
[-disable_auto_taper_ndr_nets]
```

#### Options
Expand Down Expand Up @@ -95,6 +96,7 @@ detailed_route
| `-no_pin_access` | Disables pin access for routing. |
| `-save_guide_updates` | Flag to save guides updates. |
| `-repair_pdn_vias` | This option is used for PDKs where M1 and M2 power rails run in parallel. |
| `-disable_auto_taper_ndr_nets` | Disables automatic tapering of NDR nets at pin connections. By default, tapering is enabled. |

#### Developer arguments

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1 change: 1 addition & 0 deletions src/drt/include/drt/TritonRoute.h
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Expand Up @@ -78,6 +78,7 @@ struct ParamStruct
bool saveGuideUpdates = false;
std::string repairPDNLayerName;
int num_threads = 1;
bool autoTaperNdrNets = true;
};

class TritonRoute : public PinAccessService
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1 change: 1 addition & 0 deletions src/drt/src/TritonRoute.cpp
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Expand Up @@ -1324,6 +1324,7 @@ void TritonRoute::setParams(const ParamStruct& params)
router_cfg_->SAVE_GUIDE_UPDATES = params.saveGuideUpdates;
router_cfg_->REPAIR_PDN_LAYER_NAME = params.repairPDNLayerName;
router_cfg_->MAX_THREADS = params.num_threads;
router_cfg_->AUTO_TAPER_NDR_NETS = params.autoTaperNdrNets;
}

void TritonRoute::addWorkerResults(
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6 changes: 4 additions & 2 deletions src/drt/src/TritonRoute.i
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Expand Up @@ -66,7 +66,8 @@ void detailed_route_cmd(const char* outputMazeFile,
int minAccessPoints,
bool saveGuideUpdates,
const char* repairPDNLayerName,
int drcReportIterStep)
int drcReportIterStep,
bool autoTaperNdrNets)
{
auto* router = ord::OpenRoad::openRoad()->getTritonRoute();
const int num_threads = ord::OpenRoad::openRoad()->getThreadCount();
Expand All @@ -89,7 +90,8 @@ void detailed_route_cmd(const char* outputMazeFile,
minAccessPoints,
saveGuideUpdates,
repairPDNLayerName,
num_threads});
num_threads,
autoTaperNdrNets});
router->main();
router->setDistributed(false);
}
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6 changes: 4 additions & 2 deletions src/drt/src/TritonRoute.tcl
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Expand Up @@ -28,6 +28,7 @@ sta::define_cmd_args "detailed_route" {
[-save_guide_updates]
[-repair_pdn_vias layer]
[-single_step_dr]
[-disable_auto_taper_ndr_nets]
}

proc detailed_route { args } {
Expand All @@ -38,7 +39,7 @@ proc detailed_route { args } {
-top_routing_layer -verbose -remote_host -remote_port -shared_volume \
-cloud_size -min_access_points -repair_pdn_vias -drc_report_iter_step} \
flags {-disable_via_gen -distributed -clean_patches -no_pin_access \
-single_step_dr -save_guide_updates}
-single_step_dr -save_guide_updates -disable_auto_taper_ndr_nets}
sta::check_argc_eq0 "detailed_route" $args

set enable_via_gen [expr ![info exists flags(-disable_via_gen)]]
Expand All @@ -48,6 +49,7 @@ proc detailed_route { args } {
# development. It is not listed in the help string intentionally.
set single_step_dr [expr [info exists flags(-single_step_dr)]]
set save_guide_updates [expr [info exists flags(-save_guide_updates)]]
set auto_taper_ndr_nets [expr ![info exists flags(-disable_auto_taper_ndr_nets)]]

if { [info exists keys(-repair_pdn_vias)] } {
set repair_pdn_vias $keys(-repair_pdn_vias)
Expand Down Expand Up @@ -166,7 +168,7 @@ proc detailed_route { args } {
$via_in_pin_bottom_layer $via_in_pin_top_layer \
$via_access_layer $or_seed $or_k $verbose \
$clean_patches $no_pin_access $single_step_dr $min_access_points \
$save_guide_updates $repair_pdn_vias $drc_report_iter_step
$save_guide_updates $repair_pdn_vias $drc_report_iter_step $auto_taper_ndr_nets
}

proc detailed_route_num_drvs { args } {
Expand Down