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
|
/*
* Copyright (c) 2022, 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.
*/
package compiler.intrinsics;
import java.util.random.RandomGenerator;
import java.util.random.RandomGeneratorFactory;
public class TestDoubleClassCheck {
RandomGenerator rng;
int BUFFER_SIZE = 1024;
double[] inputs;
boolean[] outputs;
public TestDoubleClassCheck() {
outputs = new boolean[BUFFER_SIZE];
inputs = new double[BUFFER_SIZE];
RandomGenerator rng = RandomGeneratorFactory.getDefault().create(0);
double input;
for (int i = 0; i < BUFFER_SIZE; i++) {
if (i % 5 == 0) {
input = (i%2 == 0) ? Double.NEGATIVE_INFINITY : Double.POSITIVE_INFINITY;
}
else if (i % 3 == 0) input = Double.NaN;
else input = rng.nextDouble();
inputs[i] = input;
}
}
public void checkResult(String method) {
for (int i=0; i < BUFFER_SIZE; i++) {
boolean expected = doubleClassCheck(inputs[i], method);
if (expected != outputs[i]) {
String errorMsg = "Correctness check failed for Double." + method +
"() for input = " + inputs[i];
throw new RuntimeException(errorMsg);
}
}
}
public boolean doubleClassCheck(double f, String method) {
long infBits = Double.doubleToRawLongBits(Double.POSITIVE_INFINITY);
long bits = Double.doubleToRawLongBits(f);
bits = bits & Long.MAX_VALUE;
switch (method) {
case "isFinite": return (bits < infBits);
case "isInfinite": return (bits == infBits);
case "isNaN": return (bits > infBits);
default: throw new IllegalArgumentException("incorrect method for Double");
}
}
}
|
