Anton Blanchard comments

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                                            Anton Blanchard

Placement resizer timing not met with OpenLane tag 2022.09.13 and above

> [37faafe](https://github.com/The-OpenROAD-Project/OpenLane/commit/37faafee20ec76a349fb817d7a75ed26d94be904) this commit changes the optimization library list. @antonblanchard @donn was this change meant to prevent the resizer from using delay buffers?

Placement resizer timing not met with OpenLane tag 2022.09.13 and above

@maliberty I'm going off the screen shot that @vijayank88 pasted into the bug, where `DONT_USE_CELLS` now includes `sky_fd_sc_hd__dly*` `DONT_USE_CELLS` is defined as `The list of cells to not use during...

Routing time too high with latest OpenROAD

Almost certainly due to an update in Yosys. The standard cell count has gone from 92546 to 94380.

[Global Routing Resizer Timing Optimizations] Stage does not fix hold violation, when a input has setup and hold violation in different end point

The resizer is unable to resolve all the setup violations, and hold fixup is being told not to create setup violations and so can't make progress. Increasing the clock period...

[Global Routing Resizer Timing Optimizations] Stage does not fix hold violation, when a input has setup and hold violation in different end point

> Even with that option, hold repair gives up after a couple of passes. It's not obvious to me why it gave up though. I see why, because the path...

Remove some cells from no_synth.tcl and drc_excluded.tcl

@RTimothyEdwards makes sense. @donn any thoughts here?

Remove some cells from no_synth.tcl and drc_excluded.tcl

Here's at least one of the reasons we excluded a cell (a magic issue since fixed): https://github.com/The-OpenROAD-Project/OpenROAD/issues/580

Remove some cells from no_synth.tcl and drc_excluded.tcl

I am finding some designs are struggling to route with this patch, investigating.

Extraction creates spurious pin on some sky130_fd_sc_hd__a21bo_1 cells

Testcase: [extract-fail.tar.gz](https://github.com/RTimothyEdwards/open_pdks/files/7930441/extract-fail.tar.gz)

Extraction creates spurious pin on some sky130_fd_sc_hd__a21bo_1 cells

@d-m-bailey here are the .ext and .spice files for both the `sky130_fd_sc_hd__a21bo_1` cell and the macro as a whole: [extract-fail-2.tar.gz](https://github.com/RTimothyEdwards/open_pdks/files/7931048/extract-fail-2.tar.gz) The cell itself: ``` * NGSPICE file created from sky130_fd_sc_hd__a21bo_1.ext...