hi @lnsharma as for the 2. this PR antmicro/quicklogic-timings-importer#1 should add functionality to import the timing data from liberty format used in QLAL4S3B_ss_0p990v_m040c.sdf. I'll proceed with merge of that PR and bump the submodule.

@lnsharma the timing importer script has been updated and it can handle the liberty library files now. The QLAL4S3B_ss_0p990v_m040c.sdf is now imported.

Since the importer has been updated and many issues are now fixed, please grab the latest code , regenerate the sdfs and check them again.

Any comments on item #3. Also how should we report both best and worst case delays as mentioned in item #1.

I was reviewing generated sdf file - QLAL4S3B_ss_0p990v_m040c.sdf and as mentioned in my initial comment #3.i about sdf condition, I think we should define the condition is sdf defined format.
For example, sdf file contains these lines:

(CELL
(CELLTYPE "GMUX_IS0_EQ_0")
(INSTANCE GMUX)
(DELAY
(ABSOLUTE
(IOPATH IP IZ (:0.445:)(:0.432:))
)
)
)
(CELL
(CELLTYPE "GMUX_IS0_EQ_1")
(INSTANCE GMUX)
(DELAY
(ABSOLUTE
(IOPATH IC IZ (:1.296:)(:1.211:))
)
)
)

However, as per the format it should be defined as:
(CELL
(CELLTYPE "GMUX")
(INSTANCE GMUX)
(DELAY
(ABSOLUTE
(COND IS0_EQ_0 (IOPATH IP IZ (:0.445:)(:0.432:) ) )
(COND IS0_EQ_1 (IOPATH IC IZ (:1.296:)(:1.211:) ) )
)
)
)

In the generated "QLAL4S3B_ss_0p990v_m040c.sdf" file, the LOGIC cell related delays are directly read in from LIB file and the k-factor is not applied. Please apply k-factor while reading in delays from lib file and taking them into sdf.