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netgen
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The example cited in the last commit is not completely solved by 

the code changes in the last commit.  There is still an issue in
which pins should match between name X on one side and X[Y] on
the other side, if there is no X[Z] where Z != Y, specifically if
one or both cells is a black box, since the equivalence cannot
be determined by net matching.

The pin matching has gotten out of hand and really should be
completely redone. . .
This commit is contained in:
R. Timothy Edwards 2026-05-21 15:35:57 -04:00
parent f29452e550
commit 9630670071
1 changed files with 54 additions and 1 deletions
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55
base/netcmp.c
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@ -7896,7 +7896,7 @@ int MatchPins(struct nlist *tc1, struct nlist *tc2, int dolist)
if (*(cover + i) == (char)0) {
j = 0;
for (ob2 = tc2->cell; ob2 != NULL; ob2 = ob2->next) {
char *name1, *name2;
char *name1, *name2, *aptr1 = NULL, *aptr2 = NULL;
if (!IsPort(ob2)) break;
@ -7914,8 +7914,59 @@ int MatchPins(struct nlist *tc1, struct nlist *tc2, int dolist)
if (!strncmp(name1, "proxy", 5) && (ob2->node == -1)) name1 +=5;
if (!strncmp(name2, "proxy", 5) && (ob1->node == -1)) name2 +=5;
/* Recognize an array as matching a non-array of the same */
/* name if the array is size 1. There must be a better way */
/* to do this; this method makes excessive calls to */
/* matchfunc(). */
if ((tc1->flags & CELL_PLACEHOLDER) || (tc2->flags && CELL_PLACEHOLDER)) {
aptr1 = strchr(name1, '[');
aptr2 = strchr(name2, '[');
if ((aptr1 != NULL) && (aptr2 == NULL)) {
*aptr1 = '\0';
if ((*matchfunc)(name1, name2)) {
/* Check that name1 does not have another array
* component in ob1
*/
struct objlist *ob3;
for (ob3 = tc1->cell; ob3; ob3 = ob3->next) {
if (!IsPort(ob3)) break;
if (ob3 == ob1) continue;
if (!strncmp(ob3->name, name1, strlen(name1)) &&
*(ob3->name + strlen(name1)) == '[') {
*aptr1 = '[';
break;
}
}
}
}
if ((aptr1 == NULL) && (aptr2 != NULL)) {
*aptr2 = '\0';
if ((*matchfunc)(name1, name2)) {
/* Check that name2 does not have another array
* component in ob1
*/
struct objlist *ob3;
for (ob3 = tc2->cell; ob3; ob3 = ob3->next) {
if (!IsPort(ob3)) break;
if (ob3 == ob2) continue;
if (!strncmp(ob3->name, name2, strlen(name2)) &&
*(ob3->name + strlen(name2)) == '[') {
*aptr2 = '[';
break;
}
}
}
}
}
if ((*matchfunc)(name1, name2)) {
if (aptr1) *aptr1 = '[';
if (aptr2) *aptr2 = '[';
/* If both sides have unconnected nodes, then pins with */
/* matching names are an automatic match. Otherwise, if */
/* matching black-box entries, then pins are always */
@ -8069,6 +8120,8 @@ int MatchPins(struct nlist *tc1, struct nlist *tc2, int dolist)
}
}
if (bangptr2) *bangptr2 = '!';
if (aptr1) *aptr1 = '[';
if (aptr2) *aptr2 = '[';
j++;
}
}