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Added an option to "def read" to avoid creating obstructions from 

"BLOCKAGES" statements.
This commit is contained in:
Tim Edwards 2022-06-24 15:22:53 -04:00
parent 43d5cc2804
commit f7df5e7c86
4 changed files with 27 additions and 5 deletions
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2
VERSION
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@ -1 +1 @@
8.3.314
8.3.315

9
doc/html/def.html
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@ -30,6 +30,7 @@ Read or write DEF format files.
where <I>option</I> is one of the following:
<DL>
<DT> <B>read</B> <I>filename</I> [<B>-labels</B>] [<B>-annotate</B>]
[<B>-noblockage</B>]
<DD> Read a DEF file <I>filename</I>[<B>.def</B>]
<DT> <B>write</B> [<I>cell</I>] [<B>-units</B> <I>value</I>]
<DD> Write DEF for current or indicated cell named <I>cell</I>
@ -75,6 +76,14 @@ Read or write DEF format files.
useful for labeling all of the regular nets if the DEF file was
previously read without the <B>-labels</B> option. <P>
The "<B>-noblockage</B>" option will ignore all BLOCKAGES sections
in the DEF file, in effect producing only mask layer geometry. If
not specified, then layer BLOCKAGES in the DEF file are treated
like obstructions in LEF files, and translated into obstruction
layers in magic (per the definition of obstruction layers in either
the "lef" section of the magic technology file, or in a technology
LEF file read prior to reading the DEF file). <P>
</BLOCKQUOTE>
<H3>Implementation Notes:</H3>

5
lef/defRead.c
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@ -2333,10 +2333,11 @@ enum def_sections {DEF_VERSION = 0, DEF_NAMESCASESENSITIVE,
DEF_NONDEFAULTRULES, DEF_END};
void
DefRead(inName, dolabels, annotate)
DefRead(inName, dolabels, annotate, noblockage)
char *inName;
bool dolabels;
bool annotate;
bool noblockage;
{
CellDef *rootDef;
FILE *f;
@ -2560,7 +2561,7 @@ DefRead(inName, dolabels, annotate)
token = LefNextToken(f, TRUE);
if (sscanf(token, "%d", &total) != 1) total = 0;
LefEndStatement(f);
if (annotate)
if (annotate || noblockage)
LefSkipSection(f, sections[DEF_BLOCKAGES]);
else
DefReadBlockages(f, rootDef, sections[DEF_BLOCKAGES],

16
lef/lefCmd.c
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@ -123,6 +123,10 @@ CmdLef(w, cmd)
* created from any DEF files, which
* will be used for label annotation only.
*/
bool defNoBlockage = FALSE; /* Indicates that BLOCKAGE geometry in
* the DEF file should be ignored; only
* mask geometry will be generated.
*/
static char *cmdLefOption[] =
{
"read [filename] read a LEF file filename[.lef]\n"
@ -145,7 +149,8 @@ CmdLef(w, cmd)
{
"read [filename] read a DEF file filename[.def]\n"
" read [filename] -labels read a DEF file with net labeling\n"
" read [filename] -annotate read a DEF file for net annotation only",
" read [filename] -annotate read a DEF file for net annotation only\n",
" read [filename] -noblockage read a DEF file (mask layers only).",
"write [cell] [-allspecial] write DEF for current or indicated cell",
"writeall (use \"flatten -nosubckt\" + \"def"
" write\" instead)",
@ -216,6 +221,13 @@ CmdLef(w, cmd)
else
defLabelNets = TRUE;
}
else if (!strncmp(cmd->tx_argv[i], "-noblock", 8))
{
if (is_lef)
TxPrintf("The \"-noblockage\" option is only for def read\n");
else
defNoBlockage = TRUE;
}
}
}
}
@ -226,7 +238,7 @@ CmdLef(w, cmd)
if (is_lef)
LefRead(namep, lefImport, lefAnnotate, lefDateStamp);
else
DefRead(namep, defLabelNets, defAnnotate);
DefRead(namep, defLabelNets, defAnnotate, defNoBlockage);
break;
case LEF_WRITEALL:
if (!is_lef)