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<title>move-object</title>
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<h1>move-object</h1>
<h2>Purpose</h2>
<p>
Move the contents of one object-bearing register to another.
</p>
<h2>Details</h2>
<table class="instruc">
<thead>
<tr>
<th>Op & Format</th>
<th>Mnemonic / Syntax</th>
<th>Arguments</th>
</tr>
</thead>
<tbody>
<tr>
<td>07 12x</td>
<td>move-object vA, vB</td>
<td><code>A:</code> destination register (4 bits)<br/>
<code>B:</code> source register (4 bits)</td>
</tr>
<tr>
<td>08 22x</td>
<td>move-object/from16 vAA, vBBBB</td>
<td><code>A:</code> destination register (8 bits)<br/>
<code>B:</code> source register (16 bits)</td>
</tr>
<tr>
<td>09 32x</td>
<td>move-object/16 vAAAA, vBBBB</td>
<td><code>A:</code> destination register (16 bits)<br/>
<code>B:</code> source register (16 bits)</td>
</tr>
</tbody>
</table>
<h2>Constraints</h2>
<ul>
<li>
Both A and B must be legal register indices in the current stack frame.
</li>
<li>
Register vB must be defined.
</li>
<li>
Register vB must contain a reference value (which excludes the case of it
being part of a register pair).
</li>
</ul>
<h2>Behavior</h2>
<ul>
<li>
The value of register vB is moved to register vA, that is, vA' = vB.
</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>
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