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comparison graal/com.oracle.graal.compiler.hsail.test/src/com/oracle/graal/compiler/hsail/test/AtomicReferenceGetAndSetTest.java @ 12742:40924dbc623b

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HSAIL support for compare-and-swap and volatile load/store operations Contributed-by: Tom Deneau <tom.deneau@amd.com>
author Doug Simon <doug.simon@oracle.com>
date Sun, 10 Nov 2013 11:42:31 +0100
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12741:a5b5e1ebab81 12742:40924dbc623b
1 /*
2 * Copyright (c) 2013, 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 package com.oracle.graal.compiler.hsail.test;
24
25 import java.util.concurrent.atomic.*;
26
27 import org.junit.*;
28
29 import sun.misc.*;
30
31 import com.oracle.graal.compiler.hsail.test.infra.*;
32 import com.oracle.graal.debug.*;
33
34 /**
35 * Tests {@link AtomicReference#getAndSet(Object)} which indirectly tests
36 * {@link Unsafe#compareAndSwapObject(Object, long, Object, Object)}. The latter requires special
37 * handling if compressed oops are enabled.
38 */
39 public class AtomicReferenceGetAndSetTest extends GraalKernelTester {
40
41 static final int NUM = 20;
42 @Result public int[] followedCount = new int[NUM];
43 public MyObj[] inArray = new MyObj[NUM];
44 AtomicReference<MyObj> atomicRef = new AtomicReference<>();
45
46 public static class MyObj {
47 public int val;
48 public boolean[] followedBy = new boolean[NUM + 1];
49
50 MyObj(int n) {
51 val = n;
52 }
53 }
54
55 void setupArrays() {
56 for (int i = 0; i < NUM; i++) {
57 inArray[i] = new MyObj(i + 1);
58 }
59 atomicRef.set(new MyObj(0)); // initial value
60 }
61
62 private static final boolean DEBUG = false;
63
64 @Override
65 public void runTest() {
66 setupArrays();
67
68 dispatchMethodKernel(NUM);
69
70 // make a fake followedBy for the final object
71 MyObj finalObj = atomicRef.get();
72 finalObj.followedBy[0] = true;
73
74 // When the kernel is done, compute the number of true bits in each followedBy array;
75 for (int i = 0; i < NUM; i++) {
76 MyObj obj = inArray[i];
77 int count = 0;
78 for (int j = 0; j < NUM + 1; j++) {
79 boolean b = obj.followedBy[j];
80 if (b) {
81 count++;
82 if (DEBUG) {
83 TTY.println("obj " + obj.val + " was followed by " + j);
84 }
85 }
86
87 }
88 followedCount[i] = count;
89 }
90 }
91
92 public void run(int gid) {
93 MyObj newObj = inArray[gid];
94 MyObj oldObj = atomicRef.getAndSet(newObj);
95 oldObj.followedBy[newObj.val] = true;
96 }
97
98 @Test
99 public void test() {
100 testGeneratedHsail();
101 }
102 }