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.asm4.Type;
022    import org.jetbrains.asm4.commons.InstructionAdapter;
023    import org.jetbrains.jet.codegen.ExpressionCodegen;
024    import org.jetbrains.jet.codegen.StackValue;
025    import org.jetbrains.jet.codegen.state.GenerationState;
026    import org.jetbrains.jet.lang.psi.JetExpression;
027    
028    import java.util.List;
029    
030    import static org.jetbrains.asm4.Opcodes.*;
031    import static org.jetbrains.jet.codegen.AsmUtil.boxType;
032    import static org.jetbrains.jet.codegen.AsmUtil.unboxType;
033    
034    public class BinaryOp implements IntrinsicMethod {
035        private final int opcode;
036    
037        public BinaryOp(int opcode) {
038            this.opcode = opcode;
039        }
040    
041        @Override
042        public StackValue generate(
043                ExpressionCodegen codegen,
044                InstructionAdapter v,
045                @NotNull Type expectedType,
046                PsiElement element,
047                List<JetExpression> arguments,
048                StackValue receiver,
049                @NotNull GenerationState state
050        ) {
051            boolean nullable = expectedType.getSort() == Type.OBJECT;
052            if (nullable) {
053                expectedType = unboxType(expectedType);
054            }
055            if (arguments.size() == 1) {
056                // Intrinsic is called as an ordinary function
057                if (receiver != null) {
058                    receiver.put(expectedType, v);
059                }
060                codegen.gen(arguments.get(0), shift() ? Type.INT_TYPE : expectedType);
061            }
062            else {
063                codegen.gen(arguments.get(0), expectedType);
064                codegen.gen(arguments.get(1), shift() ? Type.INT_TYPE : expectedType);
065            }
066            v.visitInsn(expectedType.getOpcode(opcode));
067    
068            if (nullable) {
069                StackValue.onStack(expectedType).put(expectedType = boxType(expectedType), v);
070            }
071            return StackValue.onStack(expectedType);
072        }
073    
074        private boolean shift() {
075            return opcode == ISHL || opcode == ISHR || opcode == IUSHR;
076        }
077    }