--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/gov/nasa/jpf/jvm/bytecode/LDC.java	Fri Jan 23 10:14:01 2015 -0800
@@ -0,0 +1,157 @@
+/*
+ * Copyright (C) 2014, United States Government, as represented by the
+ * Administrator of the National Aeronautics and Space Administration.
+ * All rights reserved.
+ *
+ * The Java Pathfinder core (jpf-core) platform is licensed under the
+ * Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ * 
+ *        http://www.apache.org/licenses/LICENSE-2.0. 
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and 
+ * limitations under the License.
+ */
+package gov.nasa.jpf.jvm.bytecode;
+
+import gov.nasa.jpf.vm.Instruction;
+import gov.nasa.jpf.vm.ClassInfo;
+import gov.nasa.jpf.vm.ElementInfo;
+import gov.nasa.jpf.vm.LoadOnJPFRequired;
+import gov.nasa.jpf.vm.StackFrame;
+import gov.nasa.jpf.vm.ThreadInfo;
+import gov.nasa.jpf.vm.Types;
+
+
+/**
+ * Push item from runtime constant pool
+ * ... => ..., value
+ */
+public class LDC extends Instruction implements JVMInstruction {
+
+  public enum Type {STRING, CLASS, INT, FLOAT};
+
+  Type type;
+
+  protected String  string;  // the string value if Type.STRING, classname if Type.CLASS
+  protected int     value;
+
+  public LDC() {}
+
+  public LDC (String s, boolean isClass){
+    if (isClass){
+      string = Types.getClassNameFromTypeName(s);
+      type = Type.CLASS;
+    } else {
+      string = s;
+      type = Type.STRING;
+    }
+  }
+
+  public LDC (int v){
+    value = v;
+    type = Type.INT;
+  }
+
+  public LDC (float f){
+    value = Float.floatToIntBits(f);
+    type = Type.FLOAT;
+  }
+
+
+  @Override
+  public Instruction execute (ThreadInfo ti) {
+    StackFrame frame = ti.getModifiableTopFrame();
+    
+    switch (type){
+      case STRING:
+        // too bad we can't cache it, since location might change between different paths
+        ElementInfo eiValue = ti.getHeap().newInternString(string, ti); 
+        value = eiValue.getObjectRef();
+        frame.pushRef(value);
+        break;
+
+      case INT:
+      case FLOAT:
+        frame.push(value);
+        break;
+
+      case CLASS:
+        ClassInfo ci;
+        // resolve the referenced class
+        try {
+          ci = ti.resolveReferencedClass(string);
+        } catch(LoadOnJPFRequired lre) {
+          return frame.getPC();
+        }
+
+        // LDC doesn't cause a <clinit> - we only register all required classes
+        // to make sure we have class objects. <clinit>s are called prior to
+        // GET/PUT or INVOKE
+        if (!ci.isRegistered()) {
+          ci.registerClass(ti);
+        }
+
+        frame.pushRef( ci.getClassObjectRef());
+
+        break;
+    }
+    
+    return getNext(ti);
+  }
+
+  @Override
+  public int getLength() {
+    return 2; // opcode, index
+  }
+
+  @Override
+  public int getByteCode () {
+    return 0x12;
+  }
+  
+  public int getValue() {
+    return value;
+  }
+  
+  public Type getType() {
+    return type;
+  }
+  
+  public boolean isString() {
+    return (type == Type.STRING);
+  }
+  
+  public float getFloatValue(){
+	  if(type!=Type.FLOAT){
+      throw new IllegalStateException();
+	  }
+    
+	  return Float.intBitsToFloat(value);
+	}
+
+  public String getStringValue() { // if it is a String (not acquired from the class const pool)
+    if (type == Type.STRING) {
+      return string;
+    } else {
+      return null;
+    }
+  }
+  
+  public String getClassValue() { // if it is the name of a Class (acquired from the class const pool)
+	    if (type == Type.CLASS) {
+	      return string;
+	    } else {
+	      return null;
+	    }
+	  }
+
+  
+  @Override
+  public void accept(JVMInstructionVisitor insVisitor) {
+	  insVisitor.visit(this);
+  }
+}