1 /*
   2  * Copyright (c) 2014, 2015, 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 /test/lib
  31  * @modules java.base/sun.misc
  32  *          java.management
  33  * @build TestBlsmskI BMITestRunner Expr
  34  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  35  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  36  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  37  *                   -XX:+WhiteBoxAPI TestBlsmskI
  38  */
  39 
  40 import sun.hotspot.cpuinfo.CPUInfo;
  41 
  42 public class TestBlsmskI {
  43 
  44     public static void main(String args[]) throws Throwable {
  45         if (!CPUInfo.hasFeature("bmi1")) {
  46             System.out.println("INFO: CPU does not support bmi1 feature.");
  47         }
  48 
  49         BMITestRunner.runTests(BlsmskIExpr.class, args,
  50                                "-XX:+IgnoreUnrecognizedVMOptions",
  51                                "-XX:+UseBMI1Instructions");
  52         BMITestRunner.runTests(BlsmskICommutativeExpr.class, args,
  53                                "-XX:+IgnoreUnrecognizedVMOptions",
  54                                "-XX:+UseBMI1Instructions");
  55     }
  56 
  57     public static class BlsmskIExpr extends Expr.BMIUnaryIntExpr {
  58 
  59         public int intExpr(int src) {
  60             return (src - 1) ^ src;
  61         }
  62 
  63         public int intExpr(Expr.MemI src) {
  64             return (src.value - 1) ^ src.value;
  65         }
  66 
  67     }
  68 
  69     public static class BlsmskICommutativeExpr extends Expr.BMIUnaryIntExpr {
  70 
  71         public int intExpr(int src) {
  72             return src ^ (src - 1);
  73         }
  74 
  75         public int intExpr(Expr.MemI src) {
  76             return src.value ^ (src.value - 1);
  77         }
  78 
  79     }
  80 
  81 }