00001 package gov.nasa.arc.ase.jpf.jvm.bytecode;
00002
00003 import gov.nasa.arc.ase.jpf.*;
00004 import gov.nasa.arc.ase.jpf.jvm.*;
00005 import de.fub.bytecode.generic.InstructionHandle;
00006 import gov.nasa.arc.ase.util.Debug;
00007
00008 public class IFNULL extends AbstractInstruction {
00009 private de.fub.bytecode.generic.IFNULL peer;
00010
00011 public InstructionHandle execute(SystemState ss, KernelState ks, ThreadInfo th) {
00012 int v = th.pop();
00013
00014 if (v == -1) {
00015 return peer.getTarget();
00016 } else {
00017 return th.getPC().getNext();
00018 }
00019 }
00020 public void setPeer(de.fub.bytecode.generic.Instruction i) {
00021 peer = (de.fub.bytecode.generic.IFNULL)i;
00022 }
00023 }
