1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17// Note that $opt$ is a marker for the optimizing compiler to test
18// it does compile the method.
19public class Main {
20
21  public static void expectEquals(int expected, int result) {
22    if (expected != result) {
23      throw new Error("Expected: " + expected + ", found: " + result);
24    }
25  }
26
27  public static void expectEquals(long expected, long result) {
28    if (expected != result) {
29      throw new Error("Expected: " + expected + ", found: " + result);
30    }
31  }
32
33  public static void expectEquals(float expected, float result) {
34    if (expected != result) {
35      throw new Error("Expected: " + expected + ", found: " + result);
36    }
37  }
38
39  public static void expectEquals(double expected, double result) {
40    if (expected != result) {
41      throw new Error("Expected: " + expected + ", found: " + result);
42    }
43  }
44
45  public static void expectApproxEquals(float a, float b) {
46    float maxDelta = 0.0001F;
47    boolean aproxEquals = (a > b) ? ((a - b) < maxDelta) : ((b - a) < maxDelta);
48    if (!aproxEquals) {
49      throw new Error("Expected: " + a + ", found: " + b + ", with delta: " + maxDelta + " " + (a - b));
50    }
51  }
52
53  public static void expectApproxEquals(double a, double b) {
54    double maxDelta = 0.00001D;
55    boolean aproxEquals = (a > b) ? ((a - b) < maxDelta) : ((b - a) < maxDelta);
56    if (!aproxEquals) {
57      throw new Error("Expected: " + a + ", found: " + b + ", with delta: " + maxDelta + " " + (a - b));
58    }
59  }
60
61  public static void expectNaN(float a) {
62    if (a == a) {
63      throw new Error("Expected NaN: " + a);
64    }
65  }
66
67  public static void expectNaN(double a) {
68    if (a == a) {
69      throw new Error("Expected NaN: " + a);
70    }
71  }
72
73  public static void main(String[] args) {
74    subInt();
75    subLong();
76    subFloat();
77    subDouble();
78  }
79
80  private static void subInt() {
81    expectEquals(2, $opt$Sub(5, 3));
82    expectEquals(0, $opt$Sub(0, 0));
83    expectEquals(-3, $opt$Sub(0, 3));
84    expectEquals(3, $opt$Sub(3, 0));
85    expectEquals(4, $opt$Sub(1, -3));
86    expectEquals(-9, $opt$Sub(-12, -3));
87    expectEquals(134217724, $opt$Sub(134217729, 5)); // (2^27 + 1) - 5
88  }
89
90  private static void subLong() {
91    expectEquals(2L, $opt$Sub(5L, 3L));
92    expectEquals(0L, $opt$Sub(0L, 0L));
93    expectEquals(-3L, $opt$Sub(0L, 3L));
94    expectEquals(3L, $opt$Sub(3L, 0L));
95    expectEquals(4L, $opt$Sub(1L, -3L));
96    expectEquals(-9L, $opt$Sub(-12L, -3L));
97    expectEquals(134217724L, $opt$Sub(134217729L, 5L)); // (2^27 + 1) - 5
98    expectEquals(34359738362L, $opt$Sub(34359738369L, 7L)); // (2^35 + 1) - 7
99  }
100
101  private static void subFloat() {
102    expectApproxEquals(2F, $opt$Sub(5F, 3F));
103    expectApproxEquals(0F, $opt$Sub(0F, 0F));
104    expectApproxEquals(-3F, $opt$Sub(0F, 3F));
105    expectApproxEquals(3F, $opt$Sub(3F, 0F));
106    expectApproxEquals(4F, $opt$Sub(1F, -3F));
107    expectApproxEquals(-9F, $opt$Sub(-12F, -3F));
108    expectApproxEquals(34359738362F, $opt$Sub(34359738369F, 7F)); // (2^35 + 1) - 7
109    expectApproxEquals(-0.1F, $opt$Sub(0.1F, 0.2F));
110    expectApproxEquals(0.2F, $opt$Sub(-0.5F, -0.7F));
111
112    expectNaN($opt$Sub(Float.NEGATIVE_INFINITY, Float.NEGATIVE_INFINITY));
113    expectNaN($opt$Sub(Float.POSITIVE_INFINITY, Float.POSITIVE_INFINITY));
114    expectNaN($opt$Sub(Float.NaN, 11F));
115    expectNaN($opt$Sub(Float.NaN, -11F));
116    expectNaN($opt$Sub(Float.NaN, Float.NEGATIVE_INFINITY));
117    expectNaN($opt$Sub(Float.NaN, Float.POSITIVE_INFINITY));
118
119    expectEquals(Float.NEGATIVE_INFINITY, $opt$Sub(-Float.MAX_VALUE, Float.MAX_VALUE));
120    expectEquals(Float.NEGATIVE_INFINITY, $opt$Sub(2F, Float.POSITIVE_INFINITY));
121    expectEquals(Float.POSITIVE_INFINITY, $opt$Sub(Float.MAX_VALUE, -Float.MAX_VALUE));
122    expectEquals(Float.POSITIVE_INFINITY, $opt$Sub(2F, Float.NEGATIVE_INFINITY));
123    expectEquals(Float.POSITIVE_INFINITY, $opt$Sub(Float.POSITIVE_INFINITY, Float.NEGATIVE_INFINITY));
124    expectEquals(Float.NEGATIVE_INFINITY, $opt$Sub(Float.NEGATIVE_INFINITY, Float.POSITIVE_INFINITY));
125  }
126
127  private static void subDouble() {
128    expectApproxEquals(2D, $opt$Sub(5D, 3D));
129    expectApproxEquals(0D, $opt$Sub(0D, 0D));
130    expectApproxEquals(-3D, $opt$Sub(0D, 3D));
131    expectApproxEquals(3D, $opt$Sub(3D, 0D));
132    expectApproxEquals(4D, $opt$Sub(1D, -3D));
133    expectApproxEquals(-9D, $opt$Sub(-12D, -3D));
134    expectApproxEquals(134217724D, $opt$Sub(134217729D, 5D)); // (2^27 + 1) - 5
135    expectApproxEquals(34359738362D, $opt$Sub(34359738369D, 7D)); // (2^35 + 1) - 7
136    expectApproxEquals(-0.1D, $opt$Sub(0.1D, 0.2D));
137    expectApproxEquals(0.2D, $opt$Sub(-0.5D, -0.7D));
138
139    expectNaN($opt$Sub(Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY));
140    expectNaN($opt$Sub(Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY));
141    expectNaN($opt$Sub(Double.NaN, 11D));
142    expectNaN($opt$Sub(Double.NaN, -11D));
143    expectNaN($opt$Sub(Double.NaN, Double.NEGATIVE_INFINITY));
144    expectNaN($opt$Sub(Double.NaN, Double.POSITIVE_INFINITY));
145
146    expectEquals(Double.NEGATIVE_INFINITY, $opt$Sub(-Double.MAX_VALUE, Double.MAX_VALUE));
147    expectEquals(Double.NEGATIVE_INFINITY, $opt$Sub(2D, Double.POSITIVE_INFINITY));
148    expectEquals(Double.POSITIVE_INFINITY, $opt$Sub(Double.MAX_VALUE, -Double.MAX_VALUE));
149    expectEquals(Double.POSITIVE_INFINITY, $opt$Sub(2D, Double.NEGATIVE_INFINITY));
150    expectEquals(Double.POSITIVE_INFINITY, $opt$Sub(Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY));
151    expectEquals(Double.NEGATIVE_INFINITY, $opt$Sub(Double.NEGATIVE_INFINITY, Double.POSITIVE_INFINITY));
152  }
153
154  static int $opt$Sub(int a, int b) {
155    return a - b;
156  }
157
158  static long $opt$Sub(long a, long b) {
159    return a - b;
160  }
161
162  static float $opt$Sub(float a, float b) {
163    return a - b;
164  }
165
166  static double $opt$Sub(double a, double b) {
167    return a - b;
168  }
169
170}
171