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

[bugzilla-daemon at libre-riscv.org]

http://bugs.libre-riscv.org/show_bug.cgi?id=217

--- Comment #48 from Jock Tanner <tanner.of.kha at gmail.com> ---
(In reply to Luke Kenneth Casson Leighton from comment #47)
> (In reply to Jock Tanner from comment #46)
> > I think it is 'void EtesianEngine::setDefaultAb()'. But I can be wrong,
> > since it is used only once in Python code shipped with Coriolis, and not
> > documented anywhere.
> 
> have a look in other experiments, i used the function i am thinking of at
> least once.
> 
> computeAbutmentBox or something

Then we're talking about the same thing.

This is the contents of
'cumulus.plugins.clocktree.ClockTree.computeAbutmentBox' (minus the commented
out code):

  def computeAbutmentBox ( cell, spaceMargin, aspectRatio, cellGauge ):
      UpdateSession.open()
      etesian = Etesian.EtesianEngine.create( cell )
      etesian.setDefaultAb()
      etesian.destroy()
      UpdateSession.close()
      return cell.getAbutmentBox()

It's just a call to 'etesian.setDefaultAb()'. All parameters but 'cell' are
ignored.

BTW 'etesian.place()' calls 'etesian.setDefaultAb()' under the hood if cell's
AB is empty, so even this code may be superfluous. But it needs further
experimenting.

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