69 lines
2.4 KiB
Java
69 lines
2.4 KiB
Java
/*
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* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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public class Verify {
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public static String throwWord(boolean threw) {
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return (threw ? "threw" : "didn't throw");
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}
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public static void verify(int a, int b) {
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boolean exception1 = false, exception2 = false;
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int result1 = 0, result2 = 0;
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try {
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result1 = testIntrinsic(a, b);
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} catch (ArithmeticException e) {
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exception1 = true;
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}
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try {
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result2 = testNonIntrinsic(a, b);
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} catch (ArithmeticException e) {
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exception2 = true;
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}
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if (exception1 != exception2) {
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throw new RuntimeException("Intrinsic version " + throwWord(exception1) + " exception, NonIntrinsic version " + throwWord(exception2) + " for: " + a + " + " + b);
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}
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if (result1 != result2) {
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throw new RuntimeException("Intrinsic version returned: " + a + " while NonIntrinsic version returned: " + b);
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}
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}
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public static int testIntrinsic(int a, int b) {
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return java.lang.Math.addExact(a, b);
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}
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public static int testNonIntrinsic(int a, int b) {
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return safeAddExact(a, b);
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}
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// Copied java.lang.Math.addExact to avoid intrinsification
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public static int safeAddExact(int x, int y) {
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int r = x + y;
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// HD 2-12 Overflow iff both arguments have the opposite sign of the result
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if (((x ^ r) & (y ^ r)) < 0) {
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throw new ArithmeticException("integer overflow");
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}
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return r;
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}
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}
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