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      5 <head>
      6 <title>move</title>
      7 <link rel=stylesheet href="opcode.css">
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     10 <body>
     11 
     12 <h1>move</h1>
     13 
     14 <h2>Purpose</h2>
     15 
     16 <p>
     17 Move the contents of one non-object register to another.
     18 </p>
     19 
     20 <h2>Details</h2>
     21 
     22 <table class="instruc">
     23 <thead>
     24 <tr>
     25   <th>Op &amp; Format</th>
     26   <th>Mnemonic / Syntax</th>
     27   <th>Arguments</th>
     28 </tr>
     29 </thead>
     30 <tbody>
     31 <tr>
     32   <td>01 12x</td>
     33   <td>move vA, vB</td>
     34   <td><code>A:</code> destination register (4 bits)<br/>
     35     <code>B:</code> source register (4 bits)</td>
     36 </tr>
     37 <tr>
     38   <td>02 22x</td>
     39   <td>move/from16 vAA, vBBBB</td>
     40   <td><code>A:</code> destination register (8 bits)<br/>
     41     <code>B:</code> source register (16 bits)</td>
     42 </tr>
     43 <tr>
     44   <td>03 32x</td>
     45   <td>move/16 vAAAA, vBBBB</td>
     46   <td><code>A:</code> destination register (16 bits)<br/>
     47     <code>B:</code> source register (16 bits)</td>
     48 </tr>
     49 </tbody>
     50 </table>
     51 
     52 <h2>Constraints</h2>
     53 
     54 <ul>
     55   <li>
     56     Both A and B must be valid register indices in the current stack frame.
     57   </li>
     58   <li>
     59     Register vB must be defined.
     60   </li>
     61   <li>
     62     Register vB must not contain a reference value.
     63   </li>
     64   <li>
     65     Register vB must not be part of a register pair.
     66   </li>
     67 </ul>
     68 
     69 <h2>Behavior</h2>
     70 
     71 <ul>
     72   <li>
     73     The value of register vB is moved to register vA, that is, vA' = vB.
     74   </li>
     75   <li>
     76     If register v(A-1) is the first half of a register pair, register v(A-1)'
     77     becomes undefined.
     78   </li>
     79   <li>
     80     If register v(A+1) is the second half of a register pair, register v(A+1)'
     81     becomes undefined.
     82   </li>
     83 </ul>
     84 
     85 <h2>Exceptions</h2>
     86 
     87 <p>
     88 None.
     89 </p>
     90 
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