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Modified the LEF read routine so that it determines the LEF-to-

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magic conversion for making magic contact types from contact cuts
from the CIF/GDS input rules rather than the output rules.  This
generally makes more sense, plus avoids conflicts where the output
rules may be set for CIF-DRC checks and may not be appropriate for
LEF input without changing the style.
This commit is contained in:
Tim Edwards
2018-06-21 12:50:31 -04:00
parent 3b99464080
commit 4ae868802d
2 changed files with 94 additions and 3 deletions
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lef/lefRead.c
+35 -3
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@@ -40,6 +40,7 @@ static char rcsid[] __attribute__ ((unused)) = "$Header: /usr/cvsroot/magic-8.0/
#include "textio/textio.h"
#include "cif/cif.h"
#include "cif/CIFint.h" /* Access to CIFCurStyle. . . */
#include "cif/CIFread.h" /* Access to cifCurReadStyle. . . */
#include "lef/lefInt.h"
/* ---------------------------------------------------------------------*/
@@ -1618,12 +1619,43 @@ LefAddViaGeometry(f, lefl, curlayer, oscale)
/* For LEF contact types matching magic contact types, */
/* size the LEF contact cut to cover the minimum */
/* rectangle in the other layers that satisfies the */
/* CIF/GDS contact generation. */
/* CIF/GDS contact generation. Use the "cifinput" style */
/* to determine how much the via layer needs to grow to */
/* make a contact area. If the "cifinput" style is not */
/* defined, then determine rules from "cifoutput". */
if (DBIsContact(curlayer) && CIFCurStyle != NULL)
if (DBIsContact(curlayer) && cifCurReadStyle != NULL)
{
int growSize;
/* Get the amount (in magic units) that the layer needs to */
/* expand according to the "cifinput" style rules to convert */
/* a contact cut to a magic contact layer. */
growSize = CIFReadGetGrowSize(curlayer);
/* All internal LEF via geometry values are doubled */
growSize <<= 1;
if (growSize % cifCurReadStyle->crs_scaleFactor == 0)
growSize /= cifCurReadStyle->crs_scaleFactor;
else
growSize = growSize / cifCurReadStyle->crs_scaleFactor + 1;
if (growSize > 0)
{
/* cifinput styles expect the cut size to be correct, so */
/* there is no check for correctness of the layer. */
currect->r_xbot = currect->r_xbot - growSize;
currect->r_ybot = currect->r_ybot - growSize;
currect->r_xtop = currect->r_xtop + growSize;
currect->r_ytop = currect->r_ytop + growSize;
}
}
else if (DBIsContact(curlayer) && CIFCurStyle != NULL)
{
int edgeSize = 0, contSize, halfSize;
float fcontSize;
/* Get the minimum size of a contact (cut + borders) from cifoutput */
contSize = CIFGetContactSize(curlayer, &edgeSize, NULL, NULL);