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First pass at properly handling deep nwell in a parent cell under 

subcells that do not have deep nwell.  This commit handles the
case where the pwell region is explicitly marked with a layer
type.  To do:  Handle the case where the pwell region is implicit.
This commit is contained in:
Tim Edwards 2021-04-01 17:38:00 -04:00
parent 8b9c47c3ef
commit a2f7831b17
1 changed files with 67 additions and 9 deletions
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76
extract/ExtHier.c
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@ -60,16 +60,34 @@ int extHierConnectFunc2();
int extHierConnectFunc3();
Node *extHierNewNode();
/*----------------------------------------------------------------------*/
/* extHierSubShieldFunc -- */
/* */
/* Simple callback function for extHierSubstrate() that halts the */
/* search if any substrate shield type is found in the search area */
/* */
/*----------------------------------------------------------------------*/
/*----------------------------------------------*/
/* extHierSubstrate */
/* */
/* Find the substrate node of a child cell and */
/* make a connection between parent and child */
/* substrates. If either of the substrate */
/* nodes is already in the hash table, then the */
/* table will be updated as necessary. */
/*----------------------------------------------*/
int
extHierSubShieldFunc(tile)
Tile *tile;
{
return 1;
}
/*----------------------------------------------------------------------*/
/* extHierSubstrate -- */
/* */
/* Find the substrate node of a child cell and make a connection */
/* between parent and child substrates. If either of the */
/* substrate nodes is already in the hash table, then the table */
/* will be updated as necessary. */
/* */
/* This function also determines if a child cell's substrate is */
/* isolated by a substrate shield type, in which case no merge is */
/* done. */
/* */
/*----------------------------------------------------------------------*/
void
extHierSubstrate(ha, use, x, y)
@ -84,6 +102,8 @@ extHierSubstrate(ha, use, x, y)
Node *node1, *node2;
char *name1, *name2, *childname;
CellDef *def;
Rect subArea;
int pNum;
NodeRegion *extFindNodes();
@ -107,6 +127,44 @@ extHierSubstrate(ha, use, x, y)
/* Find the child's substrate node */
nodeList = extFindNodes(use->cu_def, (Rect *) NULL, TRUE);
if (nodeList == NULL) return;
/* Check if the child's substrate node is covered by any substrate */
/* shield type (e.g., deep nwell). This is a stupid-simple check */
/* on the node's lower left point. This will fail if (1) only */
/* space exists on the substrate plane in the child cell, or (2) if */
/* some but not all devices in the child are covered by a shield */
/* type. Item (1) is handled by checking if the region point is */
/* outside the cell bound and using the cell bound as the search */
/* area if so. However, it really should look for a device in the */
/* subcell that connects to the substrate. Item (2) is up to the */
/* designer to avoid (but should be flagged as an extraction */
/* error). */
if (GEO_ENCLOSE(&nodeList->nreg_ll, &use->cu_def->cd_bbox))
{
GeoTransPoint(&use->cu_transform, &nodeList->nreg_ll, &subArea.r_ll);
subArea.r_ur.p_x = subArea.r_ll.p_x + 1;
subArea.r_ur.p_y = subArea.r_ll.p_y + 1;
}
else
subArea = ha->ha_subArea;
for (pNum = PL_TECHDEPBASE; pNum < DBNumPlanes; pNum++)
{
if (TTMaskIntersect(&DBPlaneTypes[pNum],
&ExtCurStyle->exts_globSubstrateShieldTypes))
{
if (DBSrPaintArea((Tile *) NULL,
def->cd_planes[pNum], &subArea,
&ExtCurStyle->exts_globSubstrateShieldTypes,
extHierSubShieldFunc, (ClientData)NULL) != 0)
{
freeMagic(nodeList);
return;
}
}
}
/* Make sure substrate labels are represented */
ExtLabelRegions(use->cu_def, ExtCurStyle->exts_nodeConn, &nodeList,