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12323
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1 /*
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2 * Copyright (c) 2013, 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
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24 public class Verify {
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25 public static String throwWord(boolean threw) {
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26 return (threw ? "threw" : "didn't throw");
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27 }
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28
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29 public static void verify(int a, int b) {
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30 boolean exception1 = false, exception2 = false;
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31 int result1 = 0, result2 = 0;
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32 try {
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33 result1 = testIntrinsic(a, b);
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34 } catch (ArithmeticException e) {
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35 exception1 = true;
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36 }
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37 try {
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38 result2 = testNonIntrinsic(a, b);
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39 } catch (ArithmeticException e) {
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40 exception2 = true;
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41 }
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42
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43 if (exception1 != exception2) {
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44 throw new RuntimeException("Intrinsic version " + throwWord(exception1) + " exception, NonIntrinsic version " + throwWord(exception2) + " for: " + a + " + " + b);
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45 }
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46 if (result1 != result2) {
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47 throw new RuntimeException("Intrinsic version returned: " + a + " while NonIntrinsic version returned: " + b);
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48 }
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49 }
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50
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51 public static int testIntrinsic(int a, int b) {
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52 return java.lang.Math.addExact(a, b);
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53 }
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54
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55 public static int testNonIntrinsic(int a, int b) {
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56 return safeAddExact(a, b);
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57 }
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58
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59 // Copied java.lang.Math.addExact to avoid intrinsification
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60 public static int safeAddExact(int x, int y) {
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61 int r = x + y;
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62 // HD 2-12 Overflow iff both arguments have the opposite sign of the result
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63 if (((x ^ r) & (y ^ r)) < 0) {
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64 throw new ArithmeticException("integer overflow");
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65 }
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66 return r;
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67 }
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68 }
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