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<div>LEF/DEF 5.8 Language Reference</div>
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<h1>2<a name="918624"> </a></h1>
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<h1><a name="919793">ALIAS Statements</a></h1>
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<p><a name="920496">This chapter contains information about the following topics. </a></p>
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<td><a href="#ALIAS Statements" title="2" name="920506"><font color="Blue"><u>ALIAS Statements</u></font></a><a href="#ALIAS Statements" title="2"> </a></td>
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<td><a href="#Alias Definition" title="2" name="920508"><font color="Blue"><u>ALIAS Definition</u></font></a><a href="#Alias Definition" title="2"> </a></td>
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<td><a href="#Alias Examples" title="2" name="921270"><font color="Blue"><u>ALIAS Examples</u></font></a><a href="#Alias Examples" title="2"> </a></td>
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<td><a href="#Alias Expansion" title="2" name="921274"><font color="Blue"><u>ALIAS Expansion</u></font></a><a href="#Alias Expansion" title="2"> </a></td>
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<h2><a name="ALIAS Statements"></a><a name="918778">ALIAS Statements</a></h2>
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<p><a name="918780">You can use alias statements in LEF and DEF files to define commands or parameters associated with the library or design.</a><strong> </strong>An alias statement can appear anywhere in a LEF or DEF file as follows:</p>
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<blockquote>
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<font size="2" face=""Courier New"" color="#000000"></font>
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<font size="2" face=""Courier New"" color="#000000"><a name="918781">&ALIAS &&</a><font size="2" face="'Courier New'" color="#000000"><em>aliasName</em></font> = <em> </em><font size="2" face="'Courier New'" color="#000000"><em>aliasDefinition</em></font> &ENDALIAS</font>
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</blockquote>
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<p><a name="918782"><font size="2" face="'Courier New'" color="#000000">&ALIAS</font></a> and <font size="2" face="'Courier New'" color="#000000">&ENDALIAS</font> are both reserved keywords and are not case sensitive. An alias statement has the following requirements:</p>
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<td><a name="918783"><font size="2" face="'Courier New'" color="#000000">&ALIAS</font></a> must be the first token in the line in which it appears.</td>
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<td><a name="918784"><font color="#000000"><em>aliasName </em></font></a>is string name and must appear on the same line as <font color="#000000"><em>&ALIAS. </em></font>It is case sensitive based on the value of <font size="2" face="'Courier New'" color="#000000">NAMESCASENSITIVE</font> in the LEF input, or the value of <font size="2" face="'Courier New'" color="#000000">Input.Lef.Names.Case.Sensitive</font><font color="#000000"><em>.</em></font></td>
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<td><a name="918785"><font color="#000000"><em>aliasName </em></font></a>cannot contain any of the following special characters: #, space, tab, or control characters.</td>
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<td><a name="918786"><font size="2" face="'Courier New'" color="#000000">&ENDALIAS</font></a> must be the last token in the line in which it appears.</td>
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<td><a name="918787">Multiple commands can appear in the alias definition, separated by semicolons. However, the last command must not be terminated by a semicolon. </a></td>
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<h3><a name="Alias Definition"></a><a name="918790">ALIAS Definition</a></h3>
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<p><a name="918791">The alias name (</a><font color="#000000"><em>aliasName</em></font>) is an identifier for the associated alias definition (<font color="#000000"><em>aliasDefinition</em></font>). The data reader stores the alias definition in the database. If the associated alias name already exists in the database, a warning is issued and the existing definition is replaced.</p>
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<p><a name="918792">Alias definitions are text strings with the following properties:</a></p>
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<td><a name="918793"><font color="#000000"><em>aliasDefinition</em></font></a> is any text excluding "<font size="2" face="'Courier New'" color="#000000">&ENDALIAS</font>".</td>
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<td><a name="918794">All EOL, space, and tab characters are preserved.</a></td>
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<td><a name="918795"><font color="#000000"><em>aliasDefinition</em></font></a> text can expand to multiple lines.</td>
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<h3><a name="Alias Examples"></a><a name="918797">ALIAS Examples</a></h3>
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<p><a name="918798">The following examples include legal and illegal alias statements:</a></p>
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<td><a name="918799">The following statement is legal.</a></td>
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<font size="2" face=""Courier New"" color="#000000"></font>
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<font size="2" face=""Courier New"" color="#000000"><a name="918800">&ALIAS &&MAC = SROUTE ADDCELL AREA &&CORE &ENDALIAS</a></font>
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<div>
|
||
|
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<nobr>
|
||
|
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<font color="#000000"><img src="images/b_bullet.gif" alt="ParagraphBullet" border="0"></font>
|
||
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</nobr>
|
||
|
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</div>
|
||
|
|
</td>
|
||
|
|
<td><a name="918801">The following statement is illegal because </a><font size="2" face="'Courier New'" color="#000000">MAC</font> does not start with "<font size="2" face="'Courier New'" color="#000000">&&</font>".</td>
|
||
|
|
</tr>
|
||
|
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</table>
|
||
|
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</div>
|
||
|
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<blockquote>
|
||
|
|
<font size="2" face=""Courier New"" color="#000000"></font>
|
||
|
|
<font size="2" face=""Courier New"" color="#000000"><a name="918802">&ALIAS MAC = SROUTE AREA &&CORE &ENDALIAS</a></font>
|
||
|
|
</blockquote>
|
||
|
|
<div>
|
||
|
|
<table border="0" cellspacing="0" cellpadding="3" summary="">
|
||
|
|
<tr valign="baseline">
|
||
|
|
<td width="31.999679999999998">
|
||
|
|
<div>
|
||
|
|
<nobr>
|
||
|
|
<font color="#000000"><img src="images/b_bullet.gif" alt="ParagraphBullet" border="0"></font>
|
||
|
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</nobr>
|
||
|
|
</div>
|
||
|
|
</td>
|
||
|
|
<td><a name="918803">The following statement is illegal because </a><font size="2" face="'Courier New'" color="#000000">&ALIAS</font> is not the first token in this line.</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div>
|
||
|
|
<blockquote>
|
||
|
|
<font size="2" face=""Courier New"" color="#000000"></font>
|
||
|
|
<font size="2" face=""Courier New"" color="#000000"><a name="918804">( 100 200 ) &ALIAS &&MAC = SROUTE AREA &&CORE &ENDALIAS</a></font>
|
||
|
|
</blockquote>
|
||
|
|
<div>
|
||
|
|
<table border="0" cellspacing="0" cellpadding="3" summary="">
|
||
|
|
<tr valign="baseline">
|
||
|
|
<td width="31.999679999999998">
|
||
|
|
<div>
|
||
|
|
<nobr>
|
||
|
|
<font color="#000000"><img src="images/b_bullet.gif" alt="ParagraphBullet" border="0"></font>
|
||
|
|
</nobr>
|
||
|
|
</div>
|
||
|
|
</td>
|
||
|
|
<td><a name="918805">The following statement is legal. It contains multiple commands; the last command is not terminated by a semicolon.</a></td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div>
|
||
|
|
<blockquote>
|
||
|
|
<font size="2" face=""Courier New"" color="#000000"></font>
|
||
|
|
<font size="2" face=""Courier New"" color="#000000"><a name="918806">$ALIAS $$ = INPUT LEF myfile.txt;<br>VERIFY LIBRARY<br>ENDALIAS</a></font>
|
||
|
|
</blockquote>
|
||
|
|
<p><a name="918807">The following examples show legal and illegal alias names:</a></p>
|
||
|
|
<div>
|
||
|
|
<table border="0" cellspacing="0" cellpadding="3" summary="">
|
||
|
|
<tr valign="baseline">
|
||
|
|
<td width="31.999679999999998">
|
||
|
|
<div>
|
||
|
|
<nobr>
|
||
|
|
<font color="#000000"><img src="images/b_bullet.gif" alt="ParagraphBullet" border="0"></font>
|
||
|
|
</nobr>
|
||
|
|
</div>
|
||
|
|
</td>
|
||
|
|
<td><a name="918808">"</a><font size="2" face="'Courier New'" color="#000000">Engineer_change</font>" is a legal alias name.</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div>
|
||
|
|
<blockquote>
|
||
|
|
<font size="2" face=""Courier New"" color="#000000"></font>
|
||
|
|
<font size="2" face=""Courier New"" color="#000000"><a name="918809">&&Engineer_change</a></font>
|
||
|
|
</blockquote>
|
||
|
|
<div>
|
||
|
|
<table border="0" cellspacing="0" cellpadding="3" summary="">
|
||
|
|
<tr valign="baseline">
|
||
|
|
<td width="31.999679999999998">
|
||
|
|
<div>
|
||
|
|
<nobr>
|
||
|
|
<font color="#000000"><img src="images/b_bullet.gif" alt="ParagraphBullet" border="0"></font>
|
||
|
|
</nobr>
|
||
|
|
</div>
|
||
|
|
</td>
|
||
|
|
<td><a name="918810">"</a><font size="2" face="'Courier New'" color="#000000">&Version&History&&</font>" is a legal alias name.</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div>
|
||
|
|
<blockquote>
|
||
|
|
<font size="2" face=""Courier New"" color="#000000"></font>
|
||
|
|
<font size="2" face=""Courier New"" color="#000000"><a name="918811">&&&Version&History&&</a></font>
|
||
|
|
</blockquote>
|
||
|
|
<div>
|
||
|
|
<table border="0" cellspacing="0" cellpadding="3" summary="">
|
||
|
|
<tr valign="baseline">
|
||
|
|
<td width="31.999679999999998">
|
||
|
|
<div>
|
||
|
|
<nobr>
|
||
|
|
<font color="#000000"><img src="images/b_bullet.gif" alt="ParagraphBullet" border="0"></font>
|
||
|
|
</nobr>
|
||
|
|
</div>
|
||
|
|
</td>
|
||
|
|
<td><a name="918812">"</a><font size="2" face="'Courier New'" color="#000000">design history</font>" is an illegal alias name. It contains a space character and is considered as two tokens: an <font color="#000000"><em>aliasName </em></font>token "<font size="2" face="'Courier New'" color="#000000">&&design</font>," and a non-<font color="#000000"><em>aliasName </em></font>token "<font size="2" face="'Courier New'" color="#000000">history</font>".</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div>
|
||
|
|
<blockquote>
|
||
|
|
<font size="2" face=""Courier New"" color="#000000"></font>
|
||
|
|
<font size="2" face=""Courier New"" color="#000000"><a name="918813">&&design history</a></font>
|
||
|
|
</blockquote>
|
||
|
|
<div>
|
||
|
|
<table border="0" cellspacing="0" cellpadding="3" summary="">
|
||
|
|
<tr valign="baseline">
|
||
|
|
<td width="31.999679999999998">
|
||
|
|
<div>
|
||
|
|
<nobr>
|
||
|
|
<font color="#000000"><img src="images/b_bullet.gif" alt="ParagraphBullet" border="0"></font>
|
||
|
|
</nobr>
|
||
|
|
</div>
|
||
|
|
</td>
|
||
|
|
<td><a name="918814">"</a><font size="2" face="'Courier New'" color="#000000">someName#IO-pin-Num</font>" is an illegal alias name. It contains a "#" character and is translated as one <font color="#000000"><em>aliasName </em></font>token "<font size="2" face="'Courier New'" color="#000000">&&someName</font>". The "#" is considered a comment character.</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div>
|
||
|
|
<blockquote>
|
||
|
|
<font size="2" face=""Courier New"" color="#000000"></font>
|
||
|
|
<font size="2" face=""Courier New"" color="#000000"><a name="918815">&&someName#IO-pin-Num</a></font>
|
||
|
|
</blockquote>
|
||
|
|
<h3><a name="Alias Expansion"></a><a name="918818">ALIAS Expansion</a></h3>
|
||
|
|
<p><a name="918819">Alias expansion is the reverse operation of alias definition. The following is the syntax for alias expansion.</a></p>
|
||
|
|
<blockquote>
|
||
|
|
<font size="2" face="Courier" color="#000000"></font>
|
||
|
|
<font size="2" face="Courier" color="#000000"><a name="918820"><font size="2" face="'Courier New'" color="#000000">&&</font></a><font size="2" face="'Courier New'" color="#000000"><em>aliasName</em></font></font>
|
||
|
|
</blockquote>
|
||
|
|
<p><a name="918821">where </a><font color="#000000"><em>aliasName </em></font>is any name previously defined by an alias statement. If an <font color="#000000"><em>aliasName </em></font>does not exist in the database, no substitution occurs.</p>
|
||
|
|
<p><a name="918822">You use aliases as string expansion parameters for LEF or DEF files. An alias can substitute for any token of a LEF or DEF file.</a></p>
|
||
|
|
</div>
|
||
|
|
<br>
|
||
|
|
<a href="#pagetop">Return to top of page</a>
|
||
|
|
<hr>
|
||
|
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<hr align="left">
|
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|
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<div style="text-align: left;">
|
||
|
|
<!-- Begin Buttons -->
|
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<table width="650" cellpadding="0" cellspacing="0" border="0">
|
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<tr>
|
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<td height="20" width="59">
|
||
|
|
<a href="javascript:openLibrary()"><img src="../support/nav2_library.gif" border="0" alt="View Library" height="20" width="59"></a>
|
||
|
|
</td>
|
||
|
|
<td height="20" width="73">
|
||
|
|
<a href="lefdefrefTOC.html"><img src="../support/nav2_toc.gif" alt="Table of Contents" border="0"></a>
|
||
|
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</td>
|
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<td height="20" width="46">
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||
|
|
<a href="lefdefrefIX.html"><img src="../support/nav2_index.gif" border="0"></a>
|
||
|
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</td>
|
||
|
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<td>
|
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|
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<a href="LEFSyntax.html"><img src="images/nav2_previous.gif" alt="Previous" border="0"></a>
|
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|
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|
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<td>
|
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|
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<a href="WorkingwithLEF.html"><img src="images/nav_next.gif" alt="Next" border="0"></a>
|
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|
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|
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<a>
|
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|
|
<a href="lefdefref.pdf"><img src="../support/nav2_print.gif" border="0" alt="Open PDF to print book" height="20" width="114"></a>
|
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|
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|
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<td height="20" width="61">
|
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|
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<a href="/feedback.htm"><img src="../support/nav2_feedback.gif" border="0" alt="Email Comments" height="20" width="76"></a>
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|
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<td height="20" width="43">
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<a href="../cdsuser/help.html"><img src="../support/nav2_help.gif" border="0" alt="Help Using Documentation" height="20" width="43"></a>
|
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|
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<td height="20" width="37">
|
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<a href="/exitsearch.htm"><img src="../support/nav2_exit.gif" border="0" alt="Shut Down Cadence Documentation Server" height="20" width="37"></a>
|
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|
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|
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<font size="-1" >
|
||
|
|
For support, see <a href="http://support.cadence.com" target="_blank">Cadence Online Support</a> service.</font>
|
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|
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<br>
|
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|
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<br>
|
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|
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<font size="-1" >
|
||
|
|
<font size="-1"><i>Copyright © 2016, <a href ="http://www.cadence.com">Cadence Design Systems, Inc.</a></i></font>
|
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</font>
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<br>
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<font size="-1" >
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All rights reserved.</font>
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