Development status

Updated 2026-11-01. This page describes the source published with the RustEDA development update. Use the superproject’s exact gitlinks and the repository lockfile when reproducing a run.

Spacing-aware placement and bounded physical implementation

The development source combines bounded extraction indices and query workers, single-session antenna repair, an opt-in staggered tap lattice, placement-stage diagnostics and spacing-aware electrostatic density. The density model accounts for the same cell spacing required by legalization. Optional checkpoint retention at an evaluation horizon reports the reason explicitly; the default policy stays strict. Repeated same-path routing near misses receive bounded repair.

In the qualified Ibex layout, standard-cell non-filler area is 204,053.9 µm², routed signal wire is 1,190,522 µm and the via count is 168,381. The complete CPU flow with two real SRAMs records 472.2 s and 472.6 s, with 16/16 gates, complete foundry main/antenna checks, device LVS and TT/SS timing. The additional maximal deck contains 272 categories including LU.a; the main deck checks LU.b. The qualifier requires the early checked GDS to equal the final GDS byte for byte.

The spacing-aware placer and diagnostic settings are opt-in. Dual-PDK physical smokes cover Sky130 and GF180. OpenC910 physical closure, general macro flows and GPU-integrated extraction remain unverified. The latest measurements use a pinned campaign recipe, not every default CLI configuration.

Whole-flow evidence and measurement scope · RustEDA engine status

Publication checks

The isolated source passes 472 regular Rust tests (11 ignored), formatting and all-target/all-feature Clippy. These checks do not replace the retained independent PDK/whole-flow receipts or qualify a new design.