author | roland |
Wed, 04 May 2016 13:32:03 -0700 | |
changeset 38235 | b2cbc7dbebb6 |
parent 26198 | 9113047a7f86 |
permissions | -rw-r--r-- |
26198
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
1 |
/* |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
2 |
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
4 |
* |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
5 |
* This code is free software; you can redistribute it and/or modify it |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
6 |
* under the terms of the GNU General Public License version 2 only, as |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
7 |
* published by the Free Software Foundation. |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
8 |
* |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
9 |
* This code is distributed in the hope that it will be useful, but WITHOUT |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
10 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
11 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
12 |
* version 2 for more details (a copy is included in the LICENSE file that |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
13 |
* accompanied this code). |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
14 |
* |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
15 |
* You should have received a copy of the GNU General Public License version |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
16 |
* 2 along with this work; if not, write to the Free Software Foundation, |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
17 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
18 |
* |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
19 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
20 |
* or visit www.oracle.com if you need additional information or have any |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
21 |
* questions. |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
22 |
*/ |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
23 |
|
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
24 |
/** |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
25 |
* Common library for additional constants of the {@code float} type. |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
26 |
*/ |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
27 |
public final class FloatConsts { |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
28 |
/** |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
29 |
* Don't let anyone instantiate this class. |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
30 |
*/ |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
31 |
private FloatConsts() {} |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
32 |
|
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
33 |
/** |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
34 |
* Bias used in representing a {@code float} exponent. |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
35 |
*/ |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
36 |
public static final int EXP_BIAS = 127; |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
37 |
|
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
38 |
/** |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
39 |
* Bit mask to isolate the exponent field of a {@code float}. |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
40 |
*/ |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
41 |
public static final int EXP_BIT_MASK = 0x7F800000; |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
42 |
|
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
43 |
/** |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
44 |
* Bit mask to isolate the sign bit of a {@code float}. |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
45 |
*/ |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
46 |
public static final int SIGN_BIT_MASK = 0x80000000; |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
47 |
|
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
48 |
/** |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
49 |
* Bit mask to isolate the significand field of a {@code float}. |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
50 |
*/ |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
51 |
public static final int SIGNIF_BIT_MASK = 0x007FFFFF; |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
52 |
|
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
53 |
/** |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
54 |
* The number of logical bits in the significand of a |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
55 |
* {@code float} number, including the implicit bit. |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
56 |
*/ |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
57 |
public static final int SIGNIFICAND_WIDTH = 24; |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
58 |
|
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
59 |
/** |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
60 |
* The exponent the smallest positive {@code float} subnormal |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
61 |
* value would have if it could be normalized. |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
62 |
*/ |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
63 |
public static final int MIN_SUB_EXPONENT = Float.MIN_EXPONENT - |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
64 |
(SIGNIFICAND_WIDTH - 1); |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
65 |
|
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
66 |
static { |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
67 |
// verify bit masks cover all bit positions and that the bit |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
68 |
// masks are non-overlapping |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
69 |
assert(((SIGN_BIT_MASK | EXP_BIT_MASK | SIGNIF_BIT_MASK) == ~0) && |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
70 |
(((SIGN_BIT_MASK & EXP_BIT_MASK) == 0) && |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
71 |
((SIGN_BIT_MASK & SIGNIF_BIT_MASK) == 0) && |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
72 |
((EXP_BIT_MASK & SIGNIF_BIT_MASK) == 0))); |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
73 |
} |
9113047a7f86
8055852: Add test/java/lang/Math/DoubleConsts.java and FloatConsts.java
mchung
parents:
diff
changeset
|
74 |
} |