Create and use LZCOUNT Pcode op

GhidraDocs/languages/html/pcodedescription.html

@@ -676,6 +676,49 @@ count is zero extended into the output varnode.
 </div>
 <div class="sect2">
 <div class="titlepage"><div><div><h3 class="title">
+<a name="cpui_lzcount"></a>LZCOUNT</h3></div></div></div>
+<div class="informalexample"><div class="table">
+<a name="lzcount.htmltable"></a><table xml:id="lzcount.htmltable" frame="above" width="80%" rules="groups">
+<col width="23%">
+<col width="15%">
+<col width="61%">
+<thead><tr>
+  <td align="center" colspan="2"><span class="bold"><strong>Parameters</strong></span></td>
+  <td><span class="bold"><strong>Description</strong></span></td>
+</tr></thead>
+<tbody>
+<tr>
+  <td align="right">input0</td>
+  <td></td>
+  <td>Input varnode to count.</td>
+</tr>
+<tr>
+  <td align="right">output</td>
+  <td></td>
+  <td>Resulting integer varnode containing count.</td>
+</tr>
+</tbody>
+<tfoot>
+<tr>
+  <td align="center" colspan="2"><span class="bold"><strong>Semantic statement</strong></span></td>
+  <td></td>
+</tr>
+<tr>
+  <td></td>
+  <td colspan="2"><code class="code">output = lzcount(input0);</code></td>
+</tr>
+</tfoot>
+</table>
+</div></div>
+<p>
+This operator counts the number of zeros starting at the most significant bit.
+For instance, for a 4-byte varnode, a value of 0 returns 32, a value of 1
+returns 31, and the value 2<sup>31</sup> returns 0.
+The resulting count is zero extended into the output varnode.
+</p>
+</div>
+<div class="sect2">
+<div class="titlepage"><div><div><h3 class="title">
 <a name="cpui_int_equal"></a>INT_EQUAL</h3></div></div></div>
 <div class="informalexample"><div class="table">
 <a name="intequal.htmltable"></a><table xml:id="intequal.htmltable" frame="above" width="80%" rules="groups">

GhidraDocs/languages/html/pcoderef.html

@@ -26,7 +26,7 @@
 <div>
 <div><h1 class="title">
 <a name="pcoderef_title"></a>P-Code Reference Manual</h1></div>
-<div><p class="releaseinfo">Last updated September 5, 2019</p></div>
+<div><p class="releaseinfo">Last updated March 2, 2023</p></div>
 </div>
 <hr>
 </div>
@@ -117,52 +117,58 @@
 </tr>
 <tr>
  <td></td>
- <td><a class="link" href="pcodedescription.html#cpui_int_equal" title="INT_EQUAL">INT_EQUAL</a></td>
+ <td><a class="link" href="pcodedescription.html#cpui_lzcount" title="LZCOUNT">LZCOUNT</a></td>
  <td><a class="link" href="pcodedescription.html#cpui_int_mult" title="INT_MULT">INT_MULT</a></td>
  <td><a class="link" href="pcodedescription.html#cpui_float_floor" title="FLOAT_FLOOR">FLOAT_FLOOR</a></td>
 </tr>
 <tr>
  <td></td>
- <td><a class="link" href="pcodedescription.html#cpui_int_notequal" title="INT_NOTEQUAL">INT_NOTEQUAL</a></td>
+ <td><a class="link" href="pcodedescription.html#cpui_int_equal" title="INT_EQUAL">INT_EQUAL</a></td>
  <td><a class="link" href="pcodedescription.html#cpui_int_div" title="INT_DIV">INT_DIV</a></td>
  <td><a class="link" href="pcodedescription.html#cpui_float_round" title="FLOAT_ROUND">FLOAT_ROUND</a></td>
 </tr>
 <tr>
  <td></td>
- <td><a class="link" href="pcodedescription.html#cpui_int_less" title="INT_LESS">INT_LESS</a></td>
+ <td><a class="link" href="pcodedescription.html#cpui_int_notequal" title="INT_NOTEQUAL">INT_NOTEQUAL</a></td>
  <td><a class="link" href="pcodedescription.html#cpui_int_rem" title="INT_REM">INT_REM</a></td>
  <td><a class="link" href="pcodedescription.html#cpui_float_nan" title="FLOAT_NAN">FLOAT_NAN</a></td>
 </tr>
 <tr>
  <td></td>
- <td><a class="link" href="pcodedescription.html#cpui_int_sless" title="INT_SLESS">INT_SLESS</a></td>
+ <td><a class="link" href="pcodedescription.html#cpui_int_less" title="INT_LESS">INT_LESS</a></td>
  <td><a class="link" href="pcodedescription.html#cpui_int_sdiv" title="INT_SDIV">INT_SDIV</a></td>
  <td><a class="link" href="pcodedescription.html#cpui_int2float" title="INT2FLOAT">INT2FLOAT</a></td>
 </tr>
 <tr>
  <td></td>
- <td><a class="link" href="pcodedescription.html#cpui_int_lessequal" title="INT_LESSEQUAL">INT_LESSEQUAL</a></td>
+ <td><a class="link" href="pcodedescription.html#cpui_int_sless" title="INT_SLESS">INT_SLESS</a></td>
  <td><a class="link" href="pcodedescription.html#cpui_int_srem" title="INT_SREM">INT_SREM</a></td>
  <td><a class="link" href="pcodedescription.html#cpui_float2float" title="FLOAT2FLOAT">FLOAT2FLOAT</a></td>
 </tr>
 <tr>
  <td></td>
- <td><a class="link" href="pcodedescription.html#cpui_int_slessequal" title="INT_SLESSEQUAL">INT_SLESSEQUAL</a></td>
+ <td><a class="link" href="pcodedescription.html#cpui_int_lessequal" title="INT_LESSEQUAL">INT_LESSEQUAL</a></td>
  <td><a class="link" href="pcodedescription.html#cpui_bool_negate" title="BOOL_NEGATE">BOOL_NEGATE</a></td>
  <td><a class="link" href="pcodedescription.html#cpui_trunc" title="TRUNC">TRUNC</a></td>
 </tr>
 <tr>
  <td></td>
- <td><a class="link" href="pcodedescription.html#cpui_int_zext" title="INT_ZEXT">INT_ZEXT</a></td>
+ <td><a class="link" href="pcodedescription.html#cpui_int_slessequal" title="INT_SLESSEQUAL">INT_SLESSEQUAL</a></td>
  <td><a class="link" href="pcodedescription.html#cpui_bool_xor" title="BOOL_XOR">BOOL_XOR</a></td>
  <td><a class="link" href="pseudo-ops.html#cpui_cpoolref" title="CPOOLREF">CPOOLREF</a></td>
 </tr>
 <tr>
  <td></td>
- <td><a class="link" href="pcodedescription.html#cpui_int_sext" title="INT_SEXT">INT_SEXT</a></td>
+ <td><a class="link" href="pcodedescription.html#cpui_int_zext" title="INT_ZEXT">INT_ZEXT</a></td>
  <td><a class="link" href="pcodedescription.html#cpui_bool_and" title="BOOL_AND">BOOL_AND</a></td>
  <td><a class="link" href="pseudo-ops.html#cpui_new" title="NEW">NEW</a></td>
 </tr>
+<tr>
+ <td></td>
+ <td><a class="link" href="pcodedescription.html#cpui_int_sext" title="INT_SEXT">INT_SEXT</a></td>
+ <td></td>
+ <td></td>
+</tr>
 </tbody>
 </table>
 </div>

GhidraDocs/languages/html/reference.html

@@ -139,6 +139,11 @@
   <td><code class="code">popcount(v0)</code></td>
   <td>Count 1 bits in v0.</td>
 </tr>
+<tr>
+  <td>LZCOUNT</td>
+  <td><code class="code">lzcount(v0)</code></td>
+  <td>Counts the number of leading zero bits in v0.</td>
+</tr>
 <tr>
   <td>INT_EQUAL</td>
   <td><code class="code">v0 == v1</code></td>

GhidraDocs/languages/html/sleigh.html

@@ -27,7 +27,7 @@
 <div><h1 class="title">
 <a name="sleigh_title"></a>SLEIGH</h1></div>
 <div><h3 class="subtitle"><i>A Language for Rapid Processor Specification</i></h3></div>
-<div><p class="releaseinfo">Last updated August 24, 2022</p></div>
+<div><p class="releaseinfo">Last updated March 2, 2023</p></div>
 <div><p class="pubdate">Originally published December 16, 2005</p></div>
 </div>
 <hr>
@@ -372,7 +372,8 @@ general purpose processor instruction sets. They break up into groups.
 </tr>
 <tr>
   <td>Logical</td>
-  <td><code class="code">INT_NEGATE, INT_XOR, INT_AND, INT_OR, INT_LEFT, INT_RIGHT, INT_SRIGHT, POPCOUNT</code></td>
+  <td><code class="code">INT_NEGATE, INT_XOR, INT_AND, INT_OR, INT_LEFT, INT_RIGHT, INT_SRIGHT,
+  POPCOUNT, LZCOUNT</code></td>
 </tr>
 <tr>
   <td>Integer Comparison</td>

GhidraDocs/languages/html/sleigh_ref.html

@@ -83,6 +83,12 @@ to lowest.
   <td>Count the number of 1 bits in v0.
   </td>
 </tr>
+<tr>
+  <td><code class="code">LZCOUNT</code></td>
+  <td><code class="code">lzcount(v0)</code></td>
+  <td>Count the number of leading 0 bits in v0.
+  </td>
+</tr>
 <tr>
   <td><code class="code">(simulated)</code></td>
   <td><code class="code">v0[6,1]</code></td>