1 /* 2 * Copyright (c) 2014, 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 * @test 27 * @bug 8031321 28 * @summary Verify that results of computations are the same w/ 29 * and w/o usage of BLSMSK instruction 30 * @library /testlibrary /testlibrary/whitebox 31 * @build TestBlsmskI BMITestRunner Expr 32 * @run main/othervm/bootclasspath -XX:+UnlockDiagnosticVMOptions 33 * -XX:+WhiteBoxAPI TestBlsmskI 34 */ 35 36 import sun.hotspot.cpuinfo.CPUInfo; 37 38 public class TestBlsmskI { 39 40 public static void main(String args[]) throws Throwable { 41 if (!CPUInfo.hasFeature("bmi1")) { 42 System.out.println("CPU does not support bmi1 feature. " + 43 "Test skipped."); 44 return; 45 } 46 47 BMITestRunner.runTests(BlsmskIExpr.class, args, 48 "-XX:+UseBMI1Instructions"); 49 BMITestRunner.runTests(BlsmskICommutativeExpr.class, args, 50 "-XX:+UseBMI1Instructions"); 51 } 52 53 public static class BlsmskIExpr extends Expr.BMIUnaryIntExpr { 54 55 public int intExpr(int src) { 56 return (src - 1) ^ src; 57 } 58 59 public int intExpr(Expr.MemI src) { 60 return (src.value - 1) ^ src.value; 61 } 62 63 } 64 65 public static class BlsmskICommutativeExpr extends Expr.BMIUnaryIntExpr { 66 67 public int intExpr(int src) { 68 return src ^ (src - 1); 69 } 70 71 public int intExpr(Expr.MemI src) { 72 return src.value ^ (src.value - 1); 73 } 74 75 } 76 77 }