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Modified the LEF VIAGEN reading such that it can accomodate a different 

order of layers than specified in the LEF/DEF spec.  It is not clear
whether this is common practice, or a bug in the tool that produced the
DEF file that prompted this change.  NOTE:  The "grow" function applied
in this case should be replaced by the actual GDS input rule sequence,
that includes the grow and shrink merge.  Otherwise, vias read from
DEF files do not match the layout from those read from GDS, even though
the mask layers represented by the layouts are the same.
This commit is contained in:
Tim Edwards 2020-03-03 17:13:37 -05:00
parent cb7926ab0d
commit b6cb1fb54a
2 changed files with 37 additions and 1 deletions
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9
ext2spice/ext2spice.c
View File

@ -2873,7 +2873,14 @@ int spcnAP(node, resClass, scale, asterm, psterm, m, outf, w)
if (!esDistrJunct || w == -1) goto oldFmt;
dsc = w / ((nodeClient*)node->efnode_client)->m_w.widths[resClass];
if (((nodeClient*)node->efnode_client)->m_w.widths != NULL)
dsc = w / ((nodeClient*)node->efnode_client)->m_w.widths[resClass];
else
{
TxError("Device missing records for source/drain area/perim.\n");
dsc = w;
}
if (esScale < 0)
{
if (asterm)

29
lef/defRead.c
View File

@ -1287,6 +1287,35 @@ DefReadVias(f, sname, oscale, total)
blayer = LefReadLayer(f, FALSE);
clayer = LefReadLayer(f, FALSE);
tlayer = LefReadLayer(f, FALSE);
/* Provisional behavior: A known tool generating */
/* DEF uses the order (bottom, top, cut). This may */
/* be a bug in the tool and an issue is being */
/* raised. However, there is no harm in detecting */
/* which layer is the cut and swapping as needed. */
if (!DBIsContact(clayer))
{
TileType swaplayer;
LefError(DEF_WARNING, "Improper layer order for"
" VIARULE.\n");
if (DBIsContact(tlayer))
{
swaplayer = clayer;
clayer = tlayer;
tlayer = swaplayer;
}
else if (DBIsContact(blayer))
{
swaplayer = clayer;
clayer = blayer;
blayer = swaplayer;
}
else
LefError(DEF_ERROR, "No cut layer specified in"
" VIARULE.\n");
}
generated = TRUE;
break;
case DEF_VIAS_PROP_CUTSPACING: