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FCMPL.java

00001 package gov.nasa.arc.ase.jpf.jvm.bytecode;
00002 
00003 import de.fub.bytecode.classfile.ConstantPool;
00004 import gov.nasa.arc.ase.jpf.jvm.SystemState;
00005 import gov.nasa.arc.ase.jpf.jvm.KernelState;
00006 import gov.nasa.arc.ase.jpf.jvm.ThreadInfo;
00007 import gov.nasa.arc.ase.jpf.jvm.Types;
00008 import gov.nasa.arc.ase.util.Debug;
00009 
00010 public class FCMPL extends Instruction {
00011   public Instruction execute(SystemState ss, KernelState ks, ThreadInfo th) {
00012     float v1 = Types.intToFloat(th.pop());
00013     float v2 = Types.intToFloat(th.pop());
00014 
00015     if (Float.isNaN(v1) || Float.isNaN(v2))
00016       th.push(-1, false);
00017     else if (v1 == v2) 
00018       th.push(0, false);
00019     else if (v2 > v1) 
00020       th.push(1, false);
00021     else 
00022       th.push(-1, false);
00023 
00024     return th.getPC().getNext();
00025   }  
00026   public void setPeer(de.fub.bytecode.generic.Instruction i, ConstantPool cp) {
00027   }  
00028 }

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