RBA::CellInstArray.new issue

phlion

Hi Matthias,

I wrote a ruby script to merge two database with a 0_TOP cell, and it works fine to output a gds file, however it failed to output a oasis file.

newtop = layout.add_cell("0_TOP")

(0..(layout.cells-1)).each do |ci|
  if layout.cell_name(ci) == "test1_abc_TOP"
    layout.cell(newtop).insert(RBA::CellInstArray.new(ci, RBA::Trans.new(RBA::Point.new(0, 0)), RBA::Point::new(2000, 0), RBA::Point::new(0, 2000), 0, 0) )
  end
end

(0..(layout.cells-1)).each do |ci|
  if layout.cell_name(ci) == "test2_abc_TOP"
    layout.cell(newtop).insert(RBA::CellInstArray.new(ci, RBA::Trans.new(RBA::Point.new(0, 20000)), RBA::Point::new(2000, 0), RBA::Point::new(0, 2000), 0, 0) )
  end
end

layout.write("output.oas")

If I modify the CellInstArray section from

layout.cell(newtop).insert(RBA::CellInstArray.new(ci, RBA::Trans.new(RBA::Point.new(0, 0)), RBA::Point::new(2000, 0), RBA::Point::new(0, 2000), 0, 0) )

to

layout.cell(newtop).insert(RBA::CellInstArray.new(ci, RBA::Trans.new(RBA::Point.new(0, 0)) ) )

It works fine to output oasis file, is it a bug or I made any mistake about that ?

Thanks for your kindly help~

Best Regards,

chhung

Matthias

Hi chhung,

Arrays with dimensions 0x0 are illegal for OASIS (see the last two arguments to CellInstArray). For GDS2 they can be produced, although their interpretation is implementation-dependent.

I'd not use 0x0 arrays. If you want to create a single-instance array, use the second form. Only use the first form if you really want to create an array and make sure the dimensions are 1 at least.

Matthias