Mercurial > hg > truffle
view test/compiler/6946040/TestCharShortByteSwap.java @ 10370:47bdfb3d010f
8015486: PSScavenge::is_obj_in_young is unnecessarily slow with UseCompressedOops
Summary: Compare compressed oops to a compressed young gen boundary instead of uncompressing the oops before doing the young gen boundary check.
Reviewed-by: brutisso, jmasa
author | stefank |
---|---|
date | Thu, 30 May 2013 10:58:16 +0200 |
parents | 7369298bec7e |
children |
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/* * Copyright 2010 Google, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ /* * @test * @bug 6946040 * @summary Tests Character/Short.reverseBytes and their intrinsics implementation in the server compiler * @run main/othervm -Xbatch -XX:CompileOnly=.testChar,.testShort TestCharShortByteSwap */ // This test must run without any command line arguments. public class TestCharShortByteSwap { private static short initShort(String[] args, short v) { if (args.length > 0) { try { return (short) Integer.valueOf(args[0]).intValue(); } catch (NumberFormatException e) { } } return v; } private static char initChar(String[] args, char v) { if (args.length > 0) { try { return (char) Integer.valueOf(args[0]).intValue(); } catch (NumberFormatException e) { } } return v; } private static void testChar(char a, char b) { if (a != Character.reverseBytes(b)) { throw new RuntimeException("FAIL: " + (int)a + " != Character.reverseBytes(" + (int)b + ")"); } if (b != Character.reverseBytes(a)) { throw new RuntimeException("FAIL: " + (int)b + " != Character.reverseBytes(" + (int)a + ")"); } } private static void testShort(short a, short b) { if (a != Short.reverseBytes(b)) { throw new RuntimeException("FAIL: " + (int)a + " != Short.reverseBytes(" + (int)b + ")"); } if (b != Short.reverseBytes(a)) { throw new RuntimeException("FAIL: " + (int)b + " != Short.reverseBytes(" + (int)a + ")"); } } public static void main(String[] args) { for (int i = 0; i < 100000; ++i) { // Trigger compilation char c1 = initChar(args, (char) 0x0123); char c2 = initChar(args, (char) 0x2301); char c3 = initChar(args, (char) 0xaabb); char c4 = initChar(args, (char) 0xbbaa); short s1 = initShort(args, (short) 0x0123); short s2 = initShort(args, (short) 0x2301); short s3 = initShort(args, (short) 0xaabb); short s4 = initShort(args, (short) 0xbbaa); testChar(c1, c2); testChar(c3, c4); testShort(s1, s2); testShort(s3, s4); } } }