1:  package compiler;

   2:   

   3:  /**

   4:   * //虚拟机指令

   5:   *

   6:   * @author jiangnan

   7:   *

   8:   */

   9:  public class Pcode {

  10:   

  11:      public Pcode(int f, int l, int a) {

  12:          this.f = f;

  13:          this.l = l;

  14:          this.a = a;

  15:      }

  16:      public static final int LIT = 0;

  17:      public static final int OPR = 1;

  18:      public static final int LOD = 2;

  19:      public static final int STO = 3;

  20:      public static final int CAL = 4;

  21:      public static final int INT = 5;

  22:      public static final int JMP = 6;

  23:      public static final int JPC = 7;

  24:   

  25:      //各符号的名字

  26:      public static final String[] pcode = new String[]{"LIT", "OPR", "LOD", "STO", "CAL", "INT", "JMP", "JPC"};

  27:      //虚拟机代码指令

  28:      public int f;

  29:      //引用层与声明层的层次差

  30:      public int l;

  31:      //指令参数

  32:      public int a;

  33:   

  34:  }