feat!: make substitution strictly class-level, update tools

[donn]

• OpenROAD.Floorplan

  • Fixed an issue in FP_SIZING: absolute mode where if the die area's
    x0 > x1 or y0 > y1, the computed core area would no longer fit in the die
    area. Not that we recommend you ever do that, but technically OpenROAD
    allows it.

Tool Updates

• Updated nix-eda
  • Updated nixpkgs to nixos-24.11 (@ 3c53b4b)
  • Updated KLayout to 0.29.10
  • Updated Magic to 8.3.515
  • Updated Netgen to 1.5.291
• Updated OpenROAD to 655640a
  • Adds new DFT features
• Updated Volare to 0.20.5
  • Includes support for ihp-sg13g2

Misc. Enhancements/Bugfixes

• openlane.flows

  • SequentialFlow
    • Substitutions are now to be strictly consumed by the subclass initializer,
      i.e., it can no longer be done on the object-level and only on the class
      level. Additionally, it can provided as a list of tuples instead of a
      dictionary so the same key may be reused multiple times.
    • Step IDs are re-normalized after every substitution, so a substitution for
      OpenROAD.DetailedPlacement-1 for example would always refer to the
      second OpenROAD.DetailedPlacement AFTER applying all previous
      substitutions, instead of the second "original"
      OpenROAD.DetailedPlacement in the flow.

• openlane.config

  • meta.substituting_steps now only apply to the sequential flow declared in
    meta.flow and not all flows.

---

Resolves #646

[openlane-bot]

Metric comparisons are in beta. Please report bugs under the issues tab.

To create this report yourself, grab the metrics artifact from the CI run, extract them, and invoke python3 -m openlane.common.metrics compare-remote current --branch dev --table-verbosity ALL --table-out ./tables_all.md.

• Changes to critical metrics were detected in the following designs:
  • gf180mcuD/gf180mcu_fd_sc_mcu7t5v0/usb_cdc_core
  • gf180mcuD/gf180mcu_fd_sc_mcu7t5v0/wbqspiflash
  • gf180mcuD/gf180mcu_fd_sc_mcu7t5v0/zipdiv
  • sky130A/sky130_fd_sc_hd/EF_PSRAM_CTRL_V2
  • sky130A/sky130_fd_sc_hd/MS_DMAC_AHBL
  • sky130A/sky130_fd_sc_hd/MS_SPI_XIP_CACHE

Full tables ► https://gist.github.com/openlane-bot/860ccacf224d00f945c02a11b04e4991