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<head>
<title>move-result-object</title>
<link rel=stylesheet href="opcode.css">
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<body>

<h1>move-result-object</h1>

<h2>Purpose</h2>

<p>
Move the object result of the most recent invoke-kind into the indicated
register. This must be done as the instruction immediately after an invoke-kind
or filled-new-array whose (object) result is not to be ignored; anywhere else
is invalid.
</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>0c 11x</td>
  <td>move-result-object vAA</td>
  <td><code>A:</code> destination register (8 bits)</td>
</tr>
</tbody>
</table>

<h2>Constraints</h2>

<ul>
  <li>
    A must be a valid register index in the current stack frame.
  </li>
  <li>
    The instruction must be immediately preceded (in the code array) by an
    invoke-kind, filled-new-array, or filled-new-array/range instruction.
  </li>
  <li>
    The instruction must be immediately reached (in the actual control flow)
    through returning from this invoke-kind instruction or by passing a
    filled-new-array or filled-new-array/range instruction (it must not be
    jumped to).
  </li>
  <li>
    The result delivered by the invoke-kind instruction must be a reference
    value (which excludes the case of a long and double values).
  </li>
</ul>

<h2>Behavior</h2>

<ul>
  <li>
    The result delivered by the invoke-kind instruction is moved to register
    vA, that, is vA' = result.
  </li>
  <li>
    If register v(A-1) is the lower half of a register pair, register v(A-1)'
    becomes undefined.
  </li>
  <li>
    If register v(A+1) is the upper half of a register pair, register v(A+1)'
    becomes undefined.
  </li>
</ul>
 
<h2>Exceptions</h2>

<p>
None.
</p>

<h2>Notes</h2>

<p>
This instruction can also be thought of as reading the contents of a special
"result" register that is made valid and defined by executing a non-void return
instruction or a filled-new-array instruction. The execution of any other
instruction (including this one) renders this special register invalid. 
</p>

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