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.org.objectweb.asm.Opcodes.*;
030    import static org.jetbrains.jet.codegen.AsmUtil.isPrimitive;
031    import static org.jetbrains.jet.codegen.AsmUtil.numberFunctionOperandType;
032    
033    public class BinaryOp extends IntrinsicMethod {
034        private final int opcode;
035    
036        public BinaryOp(int opcode) {
037            this.opcode = opcode;
038        }
039    
040        @NotNull
041        @Override
042        public Type generateImpl(
043                @NotNull ExpressionCodegen codegen,
044                @NotNull InstructionAdapter v,
045                @NotNull Type returnType,
046                PsiElement element,
047                List<JetExpression> arguments,
048                StackValue receiver
049        ) {
050            assert isPrimitive(returnType) : "Return type of BinaryOp intrinsic should be of primitive type : " + returnType;
051    
052            Type operandType = numberFunctionOperandType(returnType);
053    
054            if (arguments.size() == 1) {
055                // Intrinsic is called as an ordinary function
056                if (receiver != null) {
057                    receiver.put(operandType, v);
058                }
059                codegen.gen(arguments.get(0), shift() ? Type.INT_TYPE : operandType);
060            }
061            else {
062                codegen.gen(arguments.get(0), operandType);
063                codegen.gen(arguments.get(1), shift() ? Type.INT_TYPE : operandType);
064            }
065            v.visitInsn(returnType.getOpcode(opcode));
066            return returnType;
067        }
068    
069        private boolean shift() {
070            return opcode == ISHL || opcode == ISHR || opcode == IUSHR;
071        }
072    }