cx.java

来自「编译原理大作业---tiger编译器 包括semant,translate,m」· Java 代码 · 共 47 行

package Translate;

abstract class Cx extends Exp {
   public Tree.Exp unEx() {
      Temp.Temp r = new Temp.Temp();
      Temp.Label t = new Temp.Label();
      Temp.Label f = new Temp.Label();
      return new Tree.ESEQ(
                new Tree.SEQ(
                   new Tree.MOVE(
                      new Tree.TEMP(r),
                      new Tree.CONST(1)),
                   new Tree.SEQ(
                      unCx(t,f),
                      new Tree.SEQ(
                         new Tree.LABEL(f),
                         new Tree.SEQ(
                            new Tree.MOVE(
                               new Tree.TEMP(r),
                               new Tree.CONST(0)),
                            new Tree.LABEL(t))))),
                         new Tree.TEMP(r));
   }

   abstract public Tree.Stm unCx(Temp.Label t, Temp.Label f);

   public Tree.Stm unNx() {
      Temp.Temp r = new Temp.Temp();
      Temp.Label t = new Temp.Label();
      Temp.Label f = new Temp.Label();

      return new Tree.SEQ(
                new Tree.MOVE(
                   new Tree.TEMP(r),
                   new Tree.CONST(1)),
                new Tree.SEQ(
                   unCx(t,f),
                   new Tree.SEQ(
                      new Tree.LABEL(f),
                      new Tree.SEQ(
                         new Tree.MOVE(
                            new Tree.TEMP(r),
                            new Tree.CONST(0)),
                         new Tree.LABEL(t)))));
   }
}