Was missing needed expansion of via cut sizes to match magic's
internal definition of via areas, when reading parameterized vias from a DEF file.
This commit is contained in:
Tim Edwards
parent
38fa141db5
commit
5ba84b068a
181
lef/lefRead.c
181
lef/lefRead.c
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@ -1729,6 +1729,101 @@ origin_error:
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&DBAllButSpaceBits);
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}
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/*
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*------------------------------------------------------------
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*
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* LefGrowVia ---
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*
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* For LEF contact types matching magic contact types, size the
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* LEF contact cut to cover the minimum rectangle in the other
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* layers that satisfies the CIF/GDS contact generation. Use
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* the "cifinput" style to determine how much the via layer
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* needs to grow to make a contact area. If the "cifinput"
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* style is not defined, then determine rules from "cifoutput".
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*
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*------------------------------------------------------------
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*/
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void LefGrowVia(curlayer, currect, lefl)
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TileType curlayer;
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Rect *currect;
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lefLayer *lefl;
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{
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if (DBIsContact(curlayer) && cifCurReadStyle != NULL)
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{
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int growSize;
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/* Get the amount (in magic units) that the layer needs to */
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/* expand according to the "cifinput" style rules to convert */
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/* a contact cut to a magic contact layer. */
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growSize = CIFReadGetGrowSize(curlayer);
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/* All internal LEF via geometry values are doubled */
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growSize <<= 1;
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if (growSize % cifCurReadStyle->crs_scaleFactor == 0)
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growSize /= cifCurReadStyle->crs_scaleFactor;
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else
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growSize = growSize / cifCurReadStyle->crs_scaleFactor + 1;
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if (growSize > 0)
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{
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/* cifinput styles expect the cut size to be correct, so */
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/* there is no check for correctness of the layer. */
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currect->r_xbot = currect->r_xbot - growSize;
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currect->r_ybot = currect->r_ybot - growSize;
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currect->r_xtop = currect->r_xtop + growSize;
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currect->r_ytop = currect->r_ytop + growSize;
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}
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}
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else if (DBIsContact(curlayer) && CIFCurStyle != NULL)
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{
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int edgeSize = 0, contSize, halfSize;
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/* Get the minimum size of a contact (cut + borders) from cifoutput */
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contSize = CIFGetContactSize(curlayer, &edgeSize, NULL, NULL);
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/* All internal LEF via geometry values are doubled */
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contSize <<= 1;
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edgeSize <<= 1;
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if (contSize % CIFCurStyle->cs_scaleFactor == 0)
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contSize /= CIFCurStyle->cs_scaleFactor;
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else
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contSize = contSize / CIFCurStyle->cs_scaleFactor + 1;
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if (edgeSize % CIFCurStyle->cs_scaleFactor == 0)
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edgeSize /= CIFCurStyle->cs_scaleFactor;
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else
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edgeSize = edgeSize / CIFCurStyle->cs_scaleFactor + 1;
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if (edgeSize > 0 && contSize > 0)
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{
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/* Flag a warning if the cut size is different from what's expected */
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if ((currect->r_xtop - currect->r_xbot != edgeSize) ||
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(currect->r_ytop - currect->r_ybot != edgeSize))
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{
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LefError(LEF_WARNING, "Cut size for magic type \"%s\" (%d x %d) does "
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"not match LEF/DEF\n",
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DBTypeLongNameTbl[lefl->type],
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edgeSize, edgeSize);
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LefError(LEF_WARNING, "Via cut size (%d x %d). Magic layer "
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"cut size will be used!\n",
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currect->r_xtop - currect->r_xbot,
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currect->r_ytop - currect->r_ybot);
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}
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halfSize = contSize >> 1;
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currect->r_xbot = ((currect->r_xbot + currect->r_xtop) / 2) - halfSize;
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currect->r_ybot = ((currect->r_ybot + currect->r_ytop) / 2) - halfSize;
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currect->r_xtop = currect->r_xbot + contSize;
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currect->r_ytop = currect->r_ybot + contSize;
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}
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}
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}
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/*
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*------------------------------------------------------------
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*
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@ -1811,6 +1906,9 @@ LefGenViaGeometry(f, lefl, sizex, sizey, spacex, spacey,
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rect.r_xtop = rect.r_xbot + (int)roundf(sizex / hscale);
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rect.r_ytop = rect.r_ybot + (int)roundf(sizey / hscale);
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/* Expand via to the size used by magic */
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LefGrowVia(clayer, &rect, lefl);
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viaLR = (LinkedRect *)mallocMagic(sizeof(LinkedRect));
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viaLR->r_next = lefl->info.via.lr;
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lefl->info.via.lr = viaLR;
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@ -1858,87 +1956,8 @@ LefAddViaGeometry(f, lefl, curlayer, oscale)
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/* Don't create any geometry for unknown layers! */
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if (curlayer < 0) return;
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/* For LEF contact types matching magic contact types, */
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/* size the LEF contact cut to cover the minimum */
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/* rectangle in the other layers that satisfies the */
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/* CIF/GDS contact generation. Use the "cifinput" style */
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/* to determine how much the via layer needs to grow to */
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/* make a contact area. If the "cifinput" style is not */
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/* defined, then determine rules from "cifoutput". */
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if (DBIsContact(curlayer) && cifCurReadStyle != NULL)
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{
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int growSize;
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/* Get the amount (in magic units) that the layer needs to */
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/* expand according to the "cifinput" style rules to convert */
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/* a contact cut to a magic contact layer. */
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growSize = CIFReadGetGrowSize(curlayer);
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/* All internal LEF via geometry values are doubled */
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growSize <<= 1;
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if (growSize % cifCurReadStyle->crs_scaleFactor == 0)
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growSize /= cifCurReadStyle->crs_scaleFactor;
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else
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growSize = growSize / cifCurReadStyle->crs_scaleFactor + 1;
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if (growSize > 0)
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{
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/* cifinput styles expect the cut size to be correct, so */
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/* there is no check for correctness of the layer. */
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currect->r_xbot = currect->r_xbot - growSize;
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currect->r_ybot = currect->r_ybot - growSize;
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currect->r_xtop = currect->r_xtop + growSize;
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currect->r_ytop = currect->r_ytop + growSize;
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}
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}
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else if (DBIsContact(curlayer) && CIFCurStyle != NULL)
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{
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int edgeSize = 0, contSize, halfSize;
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/* Get the minimum size of a contact (cut + borders) from cifoutput */
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contSize = CIFGetContactSize(curlayer, &edgeSize, NULL, NULL);
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/* All internal LEF via geometry values are doubled */
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contSize <<= 1;
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edgeSize <<= 1;
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if (contSize % CIFCurStyle->cs_scaleFactor == 0)
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contSize /= CIFCurStyle->cs_scaleFactor;
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else
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contSize = contSize / CIFCurStyle->cs_scaleFactor + 1;
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if (edgeSize % CIFCurStyle->cs_scaleFactor == 0)
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edgeSize /= CIFCurStyle->cs_scaleFactor;
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else
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edgeSize = edgeSize / CIFCurStyle->cs_scaleFactor + 1;
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if (edgeSize > 0 && contSize > 0)
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{
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/* Flag a warning if the cut size is different from what's expected */
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if ((currect->r_xtop - currect->r_xbot != edgeSize) ||
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(currect->r_ytop - currect->r_ybot != edgeSize))
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{
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LefError(LEF_WARNING, "Cut size for magic type \"%s\" (%d x %d) does "
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"not match LEF/DEF\n",
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DBTypeLongNameTbl[lefl->type],
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edgeSize, edgeSize);
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LefError(LEF_WARNING, "Via cut size (%d x %d). Magic layer "
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"cut size will be used!\n",
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currect->r_xtop - currect->r_xbot,
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currect->r_ytop - currect->r_ybot);
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}
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halfSize = contSize >> 1;
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currect->r_xbot = ((currect->r_xbot + currect->r_xtop) / 2) - halfSize;
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currect->r_ybot = ((currect->r_ybot + currect->r_ytop) / 2) - halfSize;
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currect->r_xtop = currect->r_xbot + contSize;
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currect->r_ytop = currect->r_ybot + contSize;
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}
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}
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/* Expand via to the size used by magic */
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LefGrowVia(curlayer, currect, lefl);
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if (GEO_SAMERECT(lefl->info.via.area, GeoNullRect))
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{
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