//
// 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 java.util.function.BiFunction;
import cmu.conditional.ChoiceFactory;
import cmu.conditional.Conditional;
import java.util.function.Function;
import cmu.conditional.One;
import de.fosd.typechef.featureexpr.FeatureExpr;
import gov.nasa.jpf.jvm.JVMInstruction;
import gov.nasa.jpf.vm.Instruction;
import gov.nasa.jpf.vm.StackFrame;
import gov.nasa.jpf.vm.ThreadInfo;
/**
* Divide int ..., value1, value2 =>..., result
*/
public class IDIV extends JVMInstruction {
private Conditional<Integer> pushValue = One.valueOf(0);
private FeatureExpr pushCtx;
public Conditional<Instruction> execute(FeatureExpr ctx, final ThreadInfo ti) {
pushValue = One.valueOf(0);
final StackFrame frame = ti.getModifiableTopFrame();
Conditional<Integer> v1 = frame.pop(ctx);
final Conditional<Integer> v2 = frame.pop(ctx);
final IDIV thisInstruction = this;
pushCtx = ctx;
final Conditional<Instruction> returnInstruction = v1.mapf(ctx, new BiFunction<FeatureExpr, Integer, Conditional<Instruction>>() {
@Override
public Conditional<Instruction> apply(FeatureExpr ctx, final Integer v1) {
if (v1 == 0) {
pushCtx = pushCtx.andNot(ctx);
return new One<Instruction>(new EXCEPTION(thisInstruction, "java.lang.ArithmeticException",
"division by zero"));
}
pushValue = ChoiceFactory.create(ctx, v2.mapr(new Function<Integer, Conditional<Integer>>() {
@Override
public Conditional<Integer> apply(Integer v2) {
return new One<>(v2.intValue() / v1.intValue());
}
}), pushValue);
return getNext(ctx, ti);
}
}).simplify();
frame.push(pushCtx, pushValue);
return returnInstruction;
}
public int getByteCode() {
return 0x6C;
}
public void accept(InstructionVisitor insVisitor) {
insVisitor.visit(this);
}
}