#80 Changes to netgen setup to enable device level LVS Pull request opened by d-m-bailey Before the change,

decap

and

fill

cells were ignored unconditionally. This change ignores

fill

and

tapvpwrvgnd

cells only if performing device level LVS (

MAGIC_EXT_USE_GDS

).

fill

and

tapvpwrvgnd

cells are extracted as instances only from GDS (no empty subcircuits). This causes a placeholder instance to be created with pins that don't watch the netlist spice library. Ignoring

decap

cells has been removed. There appears to be insignificant performance degradation. Previously, mosfets in the

decap

cells were not extracted, which may have presented a problem. This has been fixed. For LEF based LVS, fill cells,

decap

cells, and

tapvpwrvgnd

cells can all be included to verify connections. This may be the simplest way to check that all

fill

cells and

tapvpwrvgnd

cells are connected correctly. Floating

tapvpwrvgnd

cells do not generate errors in device level LVS if at least one is connected correctly. Floating fill cells are also undetectable in device level LVS. RTimothyEdwards/open_pdks