1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/*
* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 8199421
* @summary Test vectorization of popcount
* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UsePopCountInstruction
* compiler.vectorization.TestPopCountVector
* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UsePopCountInstruction
* -XX:MaxVectorSize=8 compiler.vectorization.TestPopCountVector
*/
package compiler.vectorization;
public class TestPopCountVector {
private int[] input;
private int[] output;
private static final int LEN = 1024;
public static void main(String args[]) {
TestPopCountVector test = new TestPopCountVector();
for (int i = 0; i < 10_000; ++i) {
test.vectorizeBitCount();
}
System.out.println("Checking popcount result");
test.checkResult();
for (int i = 0; i < 10_000; ++i) {
test.vectorizeBitCount();
}
System.out.println("Checking popcount result");
test.checkResult();
}
public TestPopCountVector() {
input = new int[LEN];
output = new int[LEN];
for (int i = 0; i < LEN; ++i) {
input[i] = i % 2 == 0 ? i : -1 * i;
}
}
public void vectorizeBitCount() {
for (int i = 0; i < LEN; ++i) {
output[i] = Integer.bitCount(input[i]);
}
}
public void checkResult() {
for (int i = 0; i < LEN; ++i) {
int expected = Integer.bitCount(input[i]);
if (output[i] != expected) {
throw new RuntimeException("Invalid result: output[" + i + "] = " + output[i] + " != " + expected);
}
}
}
}
|
