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    
017    package org.jetbrains.jet.codegen.intrinsics;
018    
019    import com.intellij.psi.PsiElement;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.org.objectweb.asm.Type;
022    import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter;
023    import org.jetbrains.jet.codegen.ExpressionCodegen;
024    import org.jetbrains.jet.codegen.StackValue;
025    import org.jetbrains.jet.lang.psi.JetExpression;
026    
027    import java.util.List;
028    
029    import static org.jetbrains.jet.codegen.AsmUtil.*;
030    
031    public class UnaryMinus extends IntrinsicMethod {
032        @NotNull
033        @Override
034        public Type generateImpl(
035                @NotNull ExpressionCodegen codegen,
036                @NotNull InstructionAdapter v,
037                @NotNull Type returnType,
038                PsiElement element,
039                List<JetExpression> arguments,
040                StackValue receiver
041        ) {
042            assert isPrimitive(returnType) : "Return type of UnaryMinus intrinsic should be of primitive type: " + returnType;
043    
044            Type operandType = numberFunctionOperandType(returnType);
045    
046            if (arguments.size() == 1) {
047                codegen.gen(arguments.get(0), operandType);
048            }
049            else {
050                receiver.put(operandType, v);
051            }
052            return genNegate(returnType, v);
053        }
054    }