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Java > Open Source Codes > jas > IincInsn


1 /**
2  * Some instructions are perniticky enough that its simpler
3  * to write them separately instead of smushing them with
4  * all the rest. the iinc instruction is one of them.
5  * @author $Author: fqian $
6  * @version $Revision: 1.1 $
7  */
8
9 package jas;
10
11 import java.io.*;
12
13
14 public class IincInsn extends Insn implements RuntimeConstants
15 {
16   /**
17    * @param vindex Index of variable to be incremented.
18    * @param increment value to be added to the variable.
19    *
20    * A wide prefix is automatically added if either the
21    * vindex exceeds 256, or the increment value lies
22    * outside the range [-128, 127]
23    *
24    * The VM spec is unclear on how the wide instruction is implemented,
25    * but the implementation makes <em>both</em> the constant and the
26    * variable index 16 bit values for the wide version of this instruction.
27    */
28   public IincInsn(int vindex, int increment)
29   {
30     opc = opc_iinc;
31     operand = new IincOperand(vindex, increment);
32   }
33 }
34
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