modelparamset.cir

Enhancement-344: .model params take the fast path's direct set
* The `.param` fast sweep (Enhancement-320..323) pushes a swept value straight
* into a resolved device slot via ft_sim->setInstanceParm, skipping the
* per-point reset. MODEL params were the one tier left out: they still went
* through the textual `altermod <model> <param> = <value>` command, which
* re-lexes the command and re-resolves the model BY NAME on every single point.
*
* E-344 resolves a model bind to (GENmodel *, type, param-id) once at arm time,
* exactly as instance binds already were, and pushes it with
* ft_sim->setModelParm. Model params now cost what instance params cost.
*
* A semiconductor resistor with l=w=1u has R = rsh, so with the 1k load
*   v(out) = 1000 / (rsh + 1000)
* which the verify script checks in closed form at every swept point.
.param rsh_p = 100
V1 in 0 dc 1
R1 in out rm l=1u w=1u
R2 out 0 1k
.model rm r rsh={rsh_p}
.control
set numdgt=12
sweep rsh_p lin 5 100 500 -analysis op -output v(out)

* rsh 100 -> 0.909090..., rsh 500 -> 0.666666...
print v(out)[0]
print v(out)[4]

echo SURVIVED
.endc
.end