genyaml

Reads the PDK’s spice library tree and writes cicsim corner definitions.

./genyaml parse $PDK_ROOT/sky130A/libs.tech/ngspice/sky130.lib.spice
./genyaml process spice.yaml --prefix K --exclude "rf_(n|p)fet|..."

Normally run through the Makefile in this folder.

parse

Walks .lib and .include recursively from the given file and dumps the tree to spice.yaml as !Spice objects. Each node records its filename, how many non-comment lines it has, how many of those are includes, and its children grouped by the .lib section they appeared in. A file whose every line is an include is marked includeOnly, which is how the walker knows to descend rather than emit it.

process

Prints one cicsim corner per .lib name found, with underscores stripped:

  Kss: |
    .param mc_mm_switch=0
    .param mc_pr_switch=0
    .include "$PDK_ROOT/sky130A/libs.tech/ngspice/..."

The two Monte Carlo switches are set from the corner name: mm in the name turns on mismatch, mc turns on process variation, anything else turns both off.

Option	Default	Meaning
`--prefix`	`K`	Prepended to every corner name
`--exclude`	none	Regex; matching include files are dropped
`--replace`	`/opt/pdk/share/pdk\\|PDK_ROOT`	`find\\|var`, rewrites the absolute PDK path as `$PDK_ROOT`

The --replace default is what keeps the generated corners portable: the paths are parsed as absolute and written back with the environment variable.