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 TestBlsmskL BMITestRunner Expr
  32  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  33  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  34  *                   -XX:+WhiteBoxAPI TestBlsmskL
  35  */
  36 
  37 import sun.hotspot.WhiteBox;
  38 import sun.hotspot.cpuinfo.CPUInfo;
  39 
  40 public class TestBlsmskL {
  41 
  42     private static WhiteBox wb = WhiteBox.getWhiteBox();
  43 
  44     public static void main(String args[]) throws Throwable {
  45         if (!new CPUInfo(wb.getCPUFeatures()).hasFeature("bmi1")) {
  46             System.out.println("CPU does not support bmi1 feature. " +
  47                                "Test skipped.");
  48             return;
  49         }
  50 
  51         BMITestRunner.runTests(BlsmskLExpr.class, args,
  52                                "-XX:+UseBMI1Instructions");
  53         BMITestRunner.runTests(BlsmskLCommutativeExpr.class, args,
  54                                "-XX:+UseBMI1Instructions");
  55     }
  56 
  57     public static class BlsmskLExpr
  58         extends Expr.BMIUnaryLongExpr {
  59 
  60         public long longExpr(long src) {
  61             return (src - 1) ^ src;
  62         }
  63 
  64         public long longExpr(Expr.MemL src) {
  65             return (src.value - 1) ^ src.value;
  66         }
  67 
  68     }
  69 
  70     public static class BlsmskLCommutativeExpr
  71         extends Expr.BMIUnaryLongExpr {
  72 
  73         public long longExpr(long src) {
  74             return src ^ (src - 1);
  75         }
  76 
  77         public long longExpr(Expr.MemL src) {
  78             return src.value ^ (src.value - 1);
  79         }
  80 
  81     }
  82 
  83 }