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Respect downward-only net labels during trace recovery #819

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Respect downward-only net labels during trace recovery #819

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9 changes: 9 additions & 0 deletions lib/solvers/LongDistancePairSolver/LongDistancePairSolver.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -313,6 +313,14 @@ export class LongDistancePairSolver extends BaseSolver {
connection.pinIds.includes(p1.pinId) &&
connection.pinIds.includes(p2.pinId),
)
const availableNetLabelOrientations = inputNetConnection
? this.inputProblem.availableNetLabelOrientations[
inputNetConnection.netId
]
: undefined
const usesDownwardOnlyNetLabels =
availableNetLabelOrientations?.length === 1 &&
availableNetLabelOrientations[0] === "y-"
const sourceChip = this.chipMap[p1.chipId]
const targetRailTrace = sameNetTraces.find(
(trace) =>
Expand All @@ -321,6 +329,7 @@ export class LongDistancePairSolver extends BaseSolver {
)
const canJoinThreePinNet =
inputNetConnection !== undefined &&
!usesDownwardOnlyNetLabels &&
sourceChip?.pins.length === 2 &&
targetRailTrace !== undefined
const junctionTracePath = canJoinThreePinNet
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