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Improve error messages when reading (and discarding) binned models, 

e.g. for Skywater PDK with up to 160 bins per model parameter set.
This commit is contained in:
Holger Vogt 2025-04-29 11:32:46 +02:00
parent 78581e3ad4
commit 33f18b485a
2 changed files with 46 additions and 25 deletions
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68
src/frontend/subckt.c
View File

@ -583,11 +583,18 @@ doit(struct card *deck, wordlist *modnames) {
scale = 1;
error = 0;
/* Second pass: do the replacements. */
/* Second pass: do the replacements.
Check if binning is used for .model inside of the subcircuit.
Reduce .model lines to the one with appropriate w and l.
(Inspired by Skywater PDK with excessive use of binning (161 bins)
in the subcircuit referencing a MOS device) */
do { /* while (!error && numpasses-- && gotone) */
struct card *c = deck;
struct card *prev_of_c = NULL;
bool foundmodel = FALSE;
gotone = FALSE;
for (; c; prev_of_c = c, c = c->nextcard) {
if (ciprefix(invoke, c->line)) { /* found reference to .subckt (i.e. component with refdes X) */
@ -597,16 +604,13 @@ doit(struct card *deck, wordlist *modnames) {
gotone = TRUE;
t = tofree = s = copy(c->line); /* s & t hold copy of component line */
/* make scname point to first non-whitepace chars after refdes invocation
* e.g. if invocation is Xreference, *scname = reference
*/
/* scname contains the refdes Xname */
tofree2 = scname = gettok(&s);
/*scname += strlen(invoke); */
while ((*scname == ' ') || (*scname == '\t') || (*scname == ':'))
scname++;
/* Now set s to point to last non-space chars in line (i.e.
* the name of the model invoked
/* Now set s to point to last non-space chars in the x line (i.e.
* the name of the model invoked)
*/
while (*s)
s++;
@ -617,38 +621,47 @@ doit(struct card *deck, wordlist *modnames) {
s--;
s++;
/* iterate through .subckt list and look for .subckt name invoked */
/* Iterate through .subckt list and look for .subckt name
corresponding to the subckt name extracted from the x line */
for (sss = subs; sss; sss = sss->su_next)
if (eq(sss->su_name, s))
break;
/* At this point, sss points to the .subckt invoked,
* and scname points to the netnames
* involved.
/* At this point,
* c is the card with the x line.
* scname points to the netname of the x line involved.
* s is the subckt name extracted from the x line.
* sss points to the subcircuit referenced by the x line
* sss->su_def is the contents of the subcircuit.
*/
/* If no .subckt is found, don't complain -- this might be an
* instance of a subckt that is defined above at higher level.
*/
if (sss) {
// tprint(sss->su_def);
/* copy of the contents between .subckt and .ends */
struct card *su_deck = inp_deckcopy(sss->su_def);
/* If we have modern PDKs, we have to reduce the amount of memory required.
We try to reduce the models to the one really used.
Otherwise su_deck is full of unused binning models.*/
Otherwise su_deck is full of unused binning models.
c->w > 0 and c->l > 0 point to an x line with given w and l
(typically a call to a MOS device). */
if ((newcompat.hs || newcompat.spe) && c->w > 0 && c->l > 0) {
/* extract wmin, wmax, lmin, lmax */
struct card* new_deck = su_deck;
struct card* enter_su_deck = su_deck;
struct card* prev = NULL;
while (su_deck) {
/* find a .model line */
if (!ciprefix(".model", su_deck->line)) {
prev = su_deck;
su_deck = su_deck->nextcard;
continue;
}
/* check if line contains wmin, wmax, lmin, lmax
if available, extract its values,
if not, go to next line */
char* curr_line = su_deck->line;
float fwmin, fwmax, flmin, flmax;
char *wmin = strstr(curr_line, " wmin=");
@ -716,32 +729,39 @@ doit(struct card *deck, wordlist *modnames) {
su_deck = su_deck->nextcard;
continue;
}
/* check if x line's w and l are withing the limites of wmin, wmax, lmin, lmax */
float csl = (float)scale * c->l;
/* scale by nf */
float csw = (float)scale * c->w / c->nf;
/*fprintf(stdout, "Debug: nf = %f\n", c->nf);*/
if (csl >= flmin && csl < flmax && csw >= fwmin && csw < fwmax) {
/* use the current .model card */
/* if within the limits, use the current .model card */
prev = su_deck;
su_deck = su_deck->nextcard;
foundmodel = TRUE;
continue;
}
else {
/* if not within the limits,
delete the .model line not fitting the device */
struct card* tmpcard = su_deck->nextcard;
line_free_x(prev->nextcard, FALSE);
su_deck = prev->nextcard = tmpcard;
}
}
su_deck = new_deck;
/* go back to the first card of su_deck */
su_deck = enter_su_deck;
}
if (!su_deck) {
fprintf(stderr, "\nError: Could not find a model for device %s in subcircuit %s\n",
scname, sss->su_name);
if (!foundmodel && (newcompat.hs || newcompat.spe) && c->w > 0 && c->l > 0) {
fprintf(stderr, "\nError: Could not find a model\n"
" for device %s in transistor subcircuit %s\n", scname, sss->su_name);
fprintf(stderr, " with w = %.3g and l = %.3g\n\n", c->w, c->l);
controlled_exit(1);
}
foundmodel = FALSE;
struct card *rest_of_c = c->nextcard;
/* Now we have to replace this line with the
@ -782,8 +802,8 @@ doit(struct card *deck, wordlist *modnames) {
tfree(tofree);
tfree(tofree2);
}
}
} /* if (ciprefix(invoke, c->line)) */
} /* for (; c; prev_of_c = c, c = c->nextcard) */
} while (!error && numpasses-- && gotone);

3
src/spicelib/parser/inpgmod.c
View File

@ -286,6 +286,7 @@ INPgetModBin(CKTcircuit *ckt, char *name, INPmodel **model, INPtables *tab, char
for (modtmp = modtab; modtmp; modtmp = modtmp->INPnextModel) {
/* exact: 1, with binning extension .[0-9]: 2*/
if (model_name_match(name, modtmp->INPmodName) < 2)
continue;
@ -328,8 +329,8 @@ INPgetModBin(CKTcircuit *ckt, char *name, INPmodel **model, INPtables *tab, char
*model = modtmp;
return NULL;
}
fprintf(stderr, "Warning: no model found for w=%.3e and l=%.3e\n", w, l);
}
return NULL;
}