1 files changed, 95 insertions, 0 deletions
diff --git a/docs/opcodes/opcode-1f-check-cast.html b/docs/opcodes/opcode-1f-check-cast.html
new file mode 100644
index 000000000..6325ca47b
--- /dev/null
+++ b/docs/opcodes/opcode-1f-check-cast.html
@@ -0,0 +1,95 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+
+<html>
+
+<head>
+<title>check-cast</title>
+<link rel=stylesheet href="opcode.css">
+</head>
+
+<body>
+
+<h1>check-cast</h1>
+
+<h2>Purpose</h2>
+
+<p>
+Throw if the reference in the given register cannot be cast to the indicated
+type. The type must be a reference type (not a primitive type). 
+</p>
+
+<h2>Details</h2>
+
+<table class="instruc">
+<thead>
+<tr>
+  <th>Op &amp; Format</th>
+  <th>Mnemonic / Syntax</th>
+  <th>Arguments</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+  <td>1f 21c</td>
+  <td>check-cast vAA, type@BBBB</td>
+  <td><code>A:</code> reference-bearing register (8 bits)<br/>
+    <code>B:</code> type index (16 bits)</td>
+</tr>
+</tbody>
+</table>
+
+<h2>Constraints</h2>
+
+<ul>
+  <li>
+    A must be a valid register index in the current stack frame.
+  </li>
+  <li>
+    Register vA must contain a reference value.
+  </li>
+  <li>
+    B must be a valid index into the type pool.
+  </li>
+  <li>
+    Type pool entry B must contain a valid type descriptor for a reference type.
+  </li>
+</ul> 
+    
+<h2>Behavior</h2>
+
+<ul>
+  <li>
+    An attempt is made to get a reference to the class C the name of which is
+    contained in type pool entry B.
+  </li>
+  <li>
+    If C has not been loaded and resolved before, it is being loaded and
+    resolved. All exceptions that are possible during class loading can occur at
+    this point.
+  </li>
+  <li>
+    The run-time type of the object reference vA is compared against C.
+    <ul>
+      <li>
+        If vA is null, the instruction succeeds (without further effects).
+      </li>
+      <li>
+        If vA is assignment compatible with C according to the usual rules of
+        the Java programming language, the instruction succeeds (without further
+        effects).
+      </li>
+    </ul>
+  </li>
+</ul>
+
+<h2>Exceptions</h2>
+
+<ul>
+  <li>
+    ClassCastException is thrown if vA is either not null or not assignment
+    compatible with C.
+  </li>
+</ul>
+
+</body>
+</html>