author | shade |
Fri, 08 Jun 2018 11:41:43 +0200 | |
changeset 50463 | 929cd9246fc9 |
permissions | -rw-r--r-- |
50463
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
1 |
/* |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
2 |
* Copyright (c) 2018, Red Hat Inc. All rights reserved. |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
4 |
* |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
5 |
* This code is free software; you can redistribute it and/or modify it |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
6 |
* under the terms of the GNU General Public License version 2 only, as |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
7 |
* published by the Free Software Foundation. |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
8 |
* |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
9 |
* This code is distributed in the hope that it will be useful, but WITHOUT |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
10 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
11 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
12 |
* version 2 for more details (a copy is included in the LICENSE file that |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
13 |
* accompanied this code). |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
14 |
* |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
15 |
* You should have received a copy of the GNU General Public License version |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
16 |
* 2 along with this work; if not, write to the Free Software Foundation, |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
17 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
18 |
* |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
19 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
20 |
* or visit www.oracle.com if you need additional information or have any |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
21 |
* questions. |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
22 |
*/ |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
23 |
|
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
24 |
/* |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
25 |
* @test |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
26 |
* @bug 8204479 |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
27 |
* @summary Bitwise AND on byte value sometimes produces wrong result |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
28 |
* |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
29 |
* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
30 |
* -XX:-UseOnStackReplacement -XX:-BackgroundCompilation -Xcomp -XX:-Inline |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
31 |
* compiler.c2.TestUnsignedByteCompare |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
32 |
*/ |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
33 |
|
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
34 |
package compiler.c2; |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
35 |
|
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
36 |
public class TestUnsignedByteCompare { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
37 |
|
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
38 |
static int p, n; |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
39 |
|
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
40 |
static void report(byte[] ba, int i, boolean failed) { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
41 |
// Enable for debugging: |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
42 |
// System.out.println((failed ? "Failed" : "Passed") + " with: " + ba[i] + " at " + i); |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
43 |
} |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
44 |
|
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
45 |
static void m1(byte[] ba) { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
46 |
for (int i = 0; i < ba.length; i++) { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
47 |
if ((ba[i] & 0xFF) < 0x10) { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
48 |
p++; |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
49 |
report(ba, i, true); |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
50 |
} else { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
51 |
n++; |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
52 |
report(ba, i, false); |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
53 |
} |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
54 |
} |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
55 |
} |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
56 |
|
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
57 |
static void m2(byte[] ba) { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
58 |
for (int i = 0; i < ba.length; i++) { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
59 |
if (((ba[i] & 0xFF) & 0x80) < 0) { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
60 |
p++; |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
61 |
report(ba, i, true); |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
62 |
} else { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
63 |
n++; |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
64 |
report(ba, i, false); |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
65 |
} |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
66 |
} |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
67 |
} |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
68 |
|
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
69 |
static public void main(String[] args) { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
70 |
final int tries = 1_000; |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
71 |
final int count = 1_000; |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
72 |
|
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
73 |
byte[] ba = new byte[count]; |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
74 |
|
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
75 |
for (int i = 0; i < count; i++) { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
76 |
int v = -(i % 126 + 1); |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
77 |
ba[i] = (byte)v; |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
78 |
} |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
79 |
|
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
80 |
for (int t = 0; t < tries; t++) { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
81 |
m1(ba); |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
82 |
if (p != 0) { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
83 |
throw new IllegalStateException("m1 error: p = " + p + ", n = " + n); |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
84 |
} |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
85 |
} |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
86 |
|
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
87 |
for (int t = 0; t < tries; t++) { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
88 |
m2(ba); |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
89 |
if (p != 0) { |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
90 |
throw new IllegalStateException("m2 error: p = " + p + ", n = " + n); |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
91 |
} |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
92 |
} |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
93 |
} |
929cd9246fc9
8204479: Bitwise AND on byte value sometimes produces wrong result
shade
parents:
diff
changeset
|
94 |
} |