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Rearranged the "lef write" routine so that the search for antenna 

gate and diffusion area on each pin is done before erasing parts
of the cell that are to be hidden by obstruction layers.  That
preserves the antenna information even when "-hide" is used.  This
corrects the issue raised by Kareem Farid in the github issue
tracker #236.
This commit is contained in:
Tim Edwards 2023-04-26 10:24:13 -04:00
parent a33d7b78b5
commit e66b2e1338
2 changed files with 32 additions and 32 deletions
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2
VERSION
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@ -1 +1 @@
8.3.394
8.3.395

62
lef/lefWrite.c
View File

@ -1440,11 +1440,42 @@ lefWriteMacro(def, f, scale, setback, pinonly, toplayer, domaster)
scx.scx_area = labr;
SelectClear();
SelectNet(&scx, lab->lab_type, 0, NULL, FALSE);
// Search for gate and diff types and accumulate antenna
// areas. For gates, check for all gate types tied to
// devices with MOSFET types (including "msubcircuit", etc.).
// For diffusion, use the types declared in the "tiedown"
// statement in the extract section of the techfile.
antgatearea = 0;
for (pNum = PL_TECHDEPBASE; pNum < DBNumPlanes; pNum++)
{
DBSrPaintArea((Tile *)NULL, SelectDef->cd_planes[pNum],
&TiPlaneRect, &gatetypemask,
lefAccumulateArea, (ClientData) &antgatearea);
// Stop after first plane with geometry to avoid double-counting
// contacts.
if (antgatearea > 0) break;
}
antdiffarea = 0;
for (pNum = PL_TECHDEPBASE; pNum < DBNumPlanes; pNum++)
{
DBSrPaintArea((Tile *)NULL, SelectDef->cd_planes[pNum],
&TiPlaneRect, &difftypemask,
lefAccumulateArea, (ClientData) &antdiffarea);
// Stop after first plane with geometry to avoid double-counting
// contacts.
if (antdiffarea > 0) break;
}
if (setback == 0)
{
Rect carea;
labelLinkedList *newlll;
SelectClear();
if (pinonly == 0)
carea = labr;
else
@ -1484,7 +1515,6 @@ lefWriteMacro(def, f, scale, setback, pinonly, toplayer, domaster)
/* For -hide with setback, select the entire net and then */
/* remove the part inside the setback area. */
SelectNet(&scx, lab->lab_type, 0, NULL, FALSE);
GEO_EXPAND(&boundary, -setback, &carea);
SelRemoveArea(&carea, &DBAllButSpaceAndDRCBits, NULL);
@ -1505,8 +1535,6 @@ lefWriteMacro(def, f, scale, setback, pinonly, toplayer, domaster)
}
else
{
SelectNet(&scx, lab->lab_type, 0, NULL, FALSE);
/* Apply any pin setback */
if (pinonly >= 0)
{
@ -1523,34 +1551,6 @@ lefWriteMacro(def, f, scale, setback, pinonly, toplayer, domaster)
}
}
// Search for gate and diff types and accumulate antenna
// areas. For gates, check for all gate types tied to
// devices with MOSFET types (including "msubcircuit", etc.).
// For diffusion, use the types declared in the "tiedown"
// statement in the extract section of the techfile.
antgatearea = 0;
for (pNum = PL_TECHDEPBASE; pNum < DBNumPlanes; pNum++)
{
DBSrPaintArea((Tile *)NULL, SelectDef->cd_planes[pNum],
&TiPlaneRect, &gatetypemask,
lefAccumulateArea, (ClientData) &antgatearea);
// Stop after first plane with geometry to avoid double-counting
// contacts.
if (antgatearea > 0) break;
}
antdiffarea = 0;
for (pNum = PL_TECHDEPBASE; pNum < DBNumPlanes; pNum++)
{
DBSrPaintArea((Tile *)NULL, SelectDef->cd_planes[pNum],
&TiPlaneRect, &difftypemask,
lefAccumulateArea, (ClientData) &antdiffarea);
// Stop after first plane with geometry to avoid double-counting
// contacts.
if (antdiffarea > 0) break;
}
if (toplayer)
{
for (pTop = DBNumPlanes - 1; pTop >= PL_TECHDEPBASE; pTop--)