001/*
002 * Copyright 2010-2013 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.jetbrains.jet.codegen.intrinsics;
018
019import com.intellij.psi.PsiElement;
020import org.jetbrains.annotations.NotNull;
021import org.jetbrains.asm4.Type;
022import org.jetbrains.asm4.commons.InstructionAdapter;
023import org.jetbrains.jet.codegen.ExpressionCodegen;
024import org.jetbrains.jet.codegen.StackValue;
025import org.jetbrains.jet.codegen.state.GenerationState;
026import org.jetbrains.jet.lang.psi.JetExpression;
027
028import java.util.List;
029
030import static org.jetbrains.jet.codegen.AsmUtil.genNegate;
031import static org.jetbrains.jet.codegen.AsmUtil.unboxType;
032
033public class UnaryMinus implements IntrinsicMethod {
034    @Override
035    public StackValue generate(
036            ExpressionCodegen codegen,
037            InstructionAdapter v,
038            @NotNull Type expectedType,
039            PsiElement element,
040            List<JetExpression> arguments,
041            StackValue receiver,
042            @NotNull GenerationState state
043    ) {
044        boolean nullable = expectedType.getSort() == Type.OBJECT;
045        if (nullable) {
046            expectedType = unboxType(expectedType);
047        }
048        if (arguments.size() == 1) {
049            codegen.gen(arguments.get(0), expectedType);
050        }
051        else {
052            receiver.put(expectedType, v);
053        }
054        StackValue.coerce(genNegate(expectedType, v), expectedType, v);
055        return StackValue.onStack(expectedType);
056    }
057}