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.
19 public class SubTest {
20 
expectEquals(int expected, int result)21   public static void expectEquals(int expected, int result) {
22     if (expected != result) {
23       throw new Error("Expected: " + expected + ", found: " + result);
24     }
25   }
26 
expectEquals(long expected, long result)27   public static void expectEquals(long expected, long result) {
28     if (expected != result) {
29       throw new Error("Expected: " + expected + ", found: " + result);
30     }
31   }
32 
expectEquals(float expected, float result)33   public static void expectEquals(float expected, float result) {
34     if (expected != result) {
35       throw new Error("Expected: " + expected + ", found: " + result);
36     }
37   }
38 
expectEquals(double expected, double result)39   public static void expectEquals(double expected, double result) {
40     if (expected != result) {
41       throw new Error("Expected: " + expected + ", found: " + result);
42     }
43   }
44 
expectApproxEquals(float a, float b)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 
expectApproxEquals(double a, double b)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 
expectNaN(float a)61   public static void expectNaN(float a) {
62     if (a == a) {
63       throw new Error("Expected NaN: " + a);
64     }
65   }
66 
expectNaN(double a)67   public static void expectNaN(double a) {
68     if (a == a) {
69       throw new Error("Expected NaN: " + a);
70     }
71   }
72 
main()73   public static void main() {
74     subInt();
75     subLong();
76     subFloat();
77     subDouble();
78   }
79 
subInt()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 
subLong()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 
subFloat()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 
subDouble()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 
$opt$Sub(int a, int b)154   static int $opt$Sub(int a, int b) {
155     return a - b;
156   }
157 
$opt$Sub(long a, long b)158   static long $opt$Sub(long a, long b) {
159     return a - b;
160   }
161 
$opt$Sub(float a, float b)162   static float $opt$Sub(float a, float b) {
163     return a - b;
164   }
165 
$opt$Sub(double a, double b)166   static double $opt$Sub(double a, double b) {
167     return a - b;
168   }
169 
170 }
171