1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 26 /** 27 * @test 28 * @bug 8148490 29 * @summary Test correct saving and restoring of vector registers at safepoints. 30 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -Xbatch -XX:-TieredCompilation -XX:CompileCommand=exclude,TestRegisterRestoring::main -XX:+SafepointALot TestRegisterRestoring 31 */ 32 public class TestRegisterRestoring { 33 public static void main(String args[]) throws Exception { 34 // Initialize 35 float[] array = new float[100]; 36 for (int i = 0; i < array.length; ++i) { 37 array[i] = 0; 38 } 39 // Test 40 for (int j = 0; j < 20_000; ++j) { 41 increment(array); 42 // Check result 43 for (int i = 0; i < array.length; i++) { 44 if (array[i] != 10_000) { 45 throw new RuntimeException("Test failed: array[" + i + "] = " + array[i] + " but should be 10.000"); 46 } 47 array[i] = 0; 48 } 49 } 50 } 51 52 static void increment(float[] array) { 53 // Loop with safepoint 54 for (long l = 0; l < 10_000; l++) { 55 // Vectorized loop 56 for (int i = 0; i < array.length; ++i) { 57 array[i] += 1; 58 } 59 } 60 } 61 } 62