[libre-riscv-dev] [Bug 217] create a "ring" system which allows pad locations to be specified conveniently

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=217

--- Comment #70 from Jean-Paul.Chaput at lip6.fr ---
(In reply to Luke Kenneth Casson Leighton from comment #68)
> how come i manage to break things all the time??
> https://gitlab.lip6.fr/vlsi-eda/coriolis/-/issues/9
> :)

That's half a bug ;-). Put a breakpoint just before the final routing
stage, to see the placement. You will see that it is broken.

In particular, no cell must be outside the abutment box for the
routing to work. It shouldn't end up in core dump, but it issue
a lot of warning/erros before. Especially the "No GCell under"
which means that something to connect to is outside the AB, that
must never happens.

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