//
// Copyright (C) 2006 United States Government as represented by the
// Administrator of the National Aeronautics and Space Administration
// (NASA). All Rights Reserved.
//
// This software is distributed under the NASA Open Source Agreement
// (NOSA), version 1.3. The NOSA has been approved by the Open Source
// Initiative. See the file NOSA-1.3-JPF at the top of the distribution
// directory tree for the complete NOSA document.
//
// THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY
// KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT
// LIMITED TO, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL CONFORM TO
// SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR
// A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT
// THE SUBJECT SOFTWARE WILL BE ERROR FREE, OR ANY WARRANTY THAT
// DOCUMENTATION, IF PROVIDED, WILL CONFORM TO THE SUBJECT SOFTWARE.
//
package gov.nasa.jpf.jvm.bytecode;
import cmu.conditional.Conditional;
import de.fosd.typechef.featureexpr.FeatureExpr;
import gov.nasa.jpf.vm.StackFrame;
import gov.nasa.jpf.vm.ThreadInfo;
/**
* Return float from method
* ..., value => [empty]
*/
public class FRETURN extends ReturnInstruction {
Conditional<Float> ret;
public int getReturnTypeSize() {
return 1;
}
protected Object getReturnedOperandAttr (FeatureExpr ctx, StackFrame frame) {
return frame.getOperandAttr(ctx);
}
protected void getAndSaveReturnValue (StackFrame frame, FeatureExpr ctx) {
ret = frame.popFloat(ctx);
}
protected void pushReturnValue (FeatureExpr ctx, StackFrame frame) {
frame.push(ctx, ret);
}
public Conditional<Float> getReturnValue () {
return ret;
}
public Conditional<Float> getReturnValue (FeatureExpr ctx, ThreadInfo ti) {
if (!isCompleted(ti)) { // we have to pull it from the operand stack
StackFrame frame = ti.getTopFrame();
ret = frame.peekFloat(ctx);
}
return ret;
}
public int getByteCode () {
return 0xAE;
}
public String toString() {
return "freturn " + mi.getFullName();
}
public void accept(InstructionVisitor insVisitor) {
insVisitor.visit(this);
}
}