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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/expression/demo/SLAddWithoutSpecializationNode.java @ 14628:a08b8694f556

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Truffle: Node API changes deprecate adoptChild, no longer needed in constructor add Node#insert for inserting new nodes into the tree (previously adoptChild) add Node#adoptChildren() helper method that adopts all (direct and indirect) children of a node, automatically called in TruffleRuntime#createCallTarget
author Andreas Woess <andreas.woess@jku.at>
date Wed, 19 Mar 2014 23:11:46 +0100
parents f3e4f746e9c6
children abe7128ca473
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1 /*
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2 * Copyright (c) 2014, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.truffle.sl.nodes.expression.demo;
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24
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25 import java.math.*;
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26
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27 import com.oracle.truffle.api.*;
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28 import com.oracle.truffle.api.dsl.*;
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29 import com.oracle.truffle.api.frame.*;
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30 import com.oracle.truffle.api.nodes.*;
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31 import com.oracle.truffle.sl.nodes.*;
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32 import com.oracle.truffle.sl.nodes.expression.*;
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33
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34 /**
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35 * This is an example how the add operation would be implemented without specializations and without
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36 * the Truffle DSL. Do not write such code in your language! See {@link SLAddNode} how the add
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37 * operation is implemented correctly.
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38 */
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39 public class SLAddWithoutSpecializationNode extends SLExpressionNode {
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40
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41 @Child private SLExpressionNode leftNode;
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42 @Child private SLExpressionNode rightNode;
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43
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44 public SLAddWithoutSpecializationNode(SLExpressionNode leftNode, SLExpressionNode rightNode) {
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45 this.leftNode = leftNode;
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46 this.rightNode = rightNode;
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47 }
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48
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49 @Override
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50 public Object executeGeneric(VirtualFrame frame) {
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51 /* Evaluate the child nodes. */
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52 Object left = leftNode.executeGeneric(frame);
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53 Object right = rightNode.executeGeneric(frame);
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54
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55 if (left instanceof Long && right instanceof Long) {
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56 /* Fast path of the arbitrary-precision arithmetic. We need to check for overflows */
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57 try {
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58 return ExactMath.addExact((Long) left, (Long) right);
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59 } catch (ArithmeticException ex) {
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60 /* Fall through to BigInteger case. */
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61 }
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62 }
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63
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64 /* Implicit type conversions. */
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65 if (left instanceof Long) {
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66 left = BigInteger.valueOf((Long) left);
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67 }
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68 if (right instanceof Long) {
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69 right = BigInteger.valueOf((Long) right);
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70 }
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71 if (left instanceof BigInteger && right instanceof BigInteger) {
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72 /* Slow path of the arbitrary-precision arithmetic. */
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73 return ((BigInteger) left).add((BigInteger) right);
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74 }
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75
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76 /* String concatenation if either the left or the right operand is a String. */
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77 if (left instanceof String || right instanceof String) {
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78 return left.toString() + right.toString();
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79 }
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80
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81 /* Type error. */
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82 throw new UnsupportedSpecializationException(this, new Node[]{leftNode, rightNode}, new Object[]{left, right});
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83 }
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84 }