<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <title>move-object</title> <link rel=stylesheet href="opcode.css"> </head> <body> <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> </body> </html>