DCMPG.java Source File

00001 package gov.nasa.arc.ase.jpf.jvm.bytecode;
00002 
00003 import de.fub.bytecode.generic.InstructionHandle;
00004 import gov.nasa.arc.ase.jpf.*;
00005 import gov.nasa.arc.ase.jpf.jvm.*;
00006 import gov.nasa.arc.ase.util.Debug;
00007 
00008 public class DCMPG extends AbstractInstruction {
00009   private de.fub.bytecode.generic.DCMPG peer;
00010 
00011   public InstructionHandle execute(SystemState ss, KernelState ks, ThreadInfo th) {
00012     double v1 = Types.longToDouble(th.pop2());
00013     double v2 = Types.longToDouble(th.pop2());
00014     
00015     if (Double.isNaN(v1) || Double.isNaN(v2))
00016       th.push(1);
00017     if (v1 == v2) 
00018       th.push(0);
00019     else if (v2 > v1) 
00020       th.push(1);
00021     else 
00022       th.push(-1);
00023 
00024     return th.getPC().getNext();
00025   }  
00026   public void setPeer(de.fub.bytecode.generic.Instruction i) {
00027     peer = (de.fub.bytecode.generic.DCMPG)i;
00028   }  
00029 }