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Guild: wafer.space Community
Channel: ℹ️ - Information / ⁉️-questions / SDF annotation issues with Icarus
After: 2026-05-31 11:59 p.m.
Before: 2026-07-01 12:00 a.m.
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[2026-06-18 6:44 p.m.] .pogeg
Currently trying out SDF annotated gate simulations as well. 
Would adding specify timing blocks be useful if Librelane can generate SDF annotations from STA  for you?


[2026-06-19 6:20 a.m.] mole99
I don't understand the question. LibreLane already generates SDF timing data, gf180mcu_as_sc_mcu7t3v3 just needs the specify blocks.
If you would like to add them, it would probably be a good idea to gate them behind an `` `ifndef FUNCTIONAL`` same as in sky130.


[2026-06-19 6:22 a.m.] .pogeg
Since Librelane can already generate SDF timing data for you, would there be a point in adding the specify blocks in the Verilog models


[2026-06-19 6:24 a.m.] mole99
The specify blocks in the Verilog models act as placeholders that the simulator populates with the SDF data. Often they are just simply empty triplets `(0.0,0.0,0.0)`.


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