Akash LevyandCursor e9c075ab94 BIGFEATURE: Add set_path_margin command (#469) ...

* Implement set_path_margin command

Adds a new set_path_margin SDC command that applies a signed slack
adjustment to the capture-clock side of timing paths. A positive
margin tightens the path (harder to meet) and a negative margin
loosens it. Supports -setup/-hold/-from/-through/-to scoping,
priority/override semantics matching other exceptions, text and
JSON report output, and write_sdc serialisation.

Adapted from Silimate PR #57; uses upstream/master Mode/Scene and
string_view APIs. Test uses unset_path_exceptions in place of the
Silimate-only reset_path alias.

Co-authored-by: Cursor <[email protected]>

* Fix nested delaySum call indentation to match project style.

Co-authored-by: Cursor <[email protected]>

* Address review: store PathMargin on PathEnd, split tests

Keep the path margin exception on PathEndClkConstrained, add
PathEnd::hasPathMargin for report gating, and split the monolithic
regression into set_path_margin1–6. Rebased onto upstream/master and
document the command in ChangeLog.

Co-authored-by: Cursor <[email protected]>

* Document set_path_margin in OpenSTA.fodt/pdf

Add the command reference, index entry, and note that
unset_path_exceptions also clears path margin exceptions.

Co-authored-by: Cursor <[email protected]>

* Drop [[nodiscard]] from PathEnd::hasPathMargin.

Co-authored-by: Cursor <[email protected]>

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Co-authored-by: Cursor <[email protected]>

2026-08-09 09:29:03 -07:00

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