TestBlsrI.java revision 11707:ad7af1afda7a 
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 BLSR instruction
30 * @library /testlibrary /test/lib /
31 * @modules java.base/jdk.internal.misc
32 *          java.management
33 *
34 * @build compiler.intrinsics.bmi.TestBlsrI
35 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
36 *                                sun.hotspot.WhiteBox$WhiteBoxPermission
37 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
38 *                   -XX:+WhiteBoxAPI
39 *                   compiler.intrinsics.bmi.TestBlsrI
40 */
41
42package compiler.intrinsics.bmi;
43
44import sun.hotspot.cpuinfo.CPUInfo;
45
46public class TestBlsrI {
47
48    public static void main(String args[]) throws Throwable {
49        if (!CPUInfo.hasFeature("bmi1")) {
50            System.out.println("INFO: CPU does not support bmi1 feature.");
51        }
52
53        BMITestRunner.runTests(BlsrIExpr.class, args,
54                               "-XX:+IgnoreUnrecognizedVMOptions",
55                               "-XX:+UseBMI1Instructions");
56        BMITestRunner.runTests(BlsrICommutativeExpr.class, args,
57                               "-XX:+IgnoreUnrecognizedVMOptions",
58                               "-XX:+UseBMI1Instructions");
59    }
60
61    public static class BlsrIExpr extends Expr.BMIUnaryIntExpr {
62
63        public int intExpr(int src) {
64            return (src - 1) & src;
65        }
66
67        public int intExpr(Expr.MemI src) {
68            return (src.value - 1) & src.value;
69        }
70
71    }
72
73    public static class BlsrICommutativeExpr extends Expr.BMIUnaryIntExpr {
74
75        public int intExpr(int src) {
76            return src & (src - 1);
77        }
78
79        public int intExpr(Expr.MemI src) {
80            return src.value & (src.value - 1);
81        }
82
83    }
84
85}
86