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
17public class Main {
18
19  public static void main(String[] args) {
20    remInt();
21    remLong();
22  }
23
24  private static void remInt() {
25    expectEquals(2, $opt$RemConst(6));
26    expectEquals(2, $opt$Rem(6, 4));
27    expectEquals(2, $opt$Rem(6, -4));
28    expectEquals(0, $opt$Rem(6, 3));
29    expectEquals(0, $opt$Rem(6, -3));
30    expectEquals(0, $opt$Rem(6, 1));
31    expectEquals(0, $opt$Rem(6, -1));
32    expectEquals(-1, $opt$Rem(-7, 3));
33    expectEquals(-1, $opt$Rem(-7, -3));
34    expectEquals(0, $opt$Rem(6, 6));
35    expectEquals(0, $opt$Rem(-6, -6));
36    expectEquals(7, $opt$Rem(7, 9));
37    expectEquals(7, $opt$Rem(7, -9));
38    expectEquals(-7, $opt$Rem(-7, 9));
39    expectEquals(-7, $opt$Rem(-7, -9));
40
41    expectEquals(0, $opt$Rem(Integer.MAX_VALUE, 1));
42    expectEquals(0, $opt$Rem(Integer.MAX_VALUE, -1));
43    expectEquals(0, $opt$Rem(Integer.MIN_VALUE, 1));
44    expectEquals(0, $opt$Rem(Integer.MIN_VALUE, -1)); // no overflow
45    expectEquals(-1, $opt$Rem(Integer.MIN_VALUE, Integer.MAX_VALUE));
46    expectEquals(Integer.MAX_VALUE, $opt$Rem(Integer.MAX_VALUE, Integer.MIN_VALUE));
47
48    expectEquals(0, $opt$Rem(0, 7));
49    expectEquals(0, $opt$Rem(0, Integer.MAX_VALUE));
50    expectEquals(0, $opt$Rem(0, Integer.MIN_VALUE));
51
52    expectDivisionByZero(0);
53    expectDivisionByZero(1);
54    expectDivisionByZero(5);
55    expectDivisionByZero(Integer.MAX_VALUE);
56    expectDivisionByZero(Integer.MIN_VALUE);
57  }
58
59  private static void remLong() {
60    expectEquals(2L, $opt$RemConst(6L));
61    expectEquals(2L, $opt$Rem(6L, 4L));
62    expectEquals(2L, $opt$Rem(6L, -4L));
63    expectEquals(0L, $opt$Rem(6L, 3L));
64    expectEquals(0L, $opt$Rem(6L, -3L));
65    expectEquals(0L, $opt$Rem(6L, 1L));
66    expectEquals(0L, $opt$Rem(6L, -1L));
67    expectEquals(-1L, $opt$Rem(-7L, 3L));
68    expectEquals(-1L, $opt$Rem(-7L, -3L));
69    expectEquals(0L, $opt$Rem(6L, 6L));
70    expectEquals(0L, $opt$Rem(-6L, -6L));
71    expectEquals(7L, $opt$Rem(7L, 9L));
72    expectEquals(7L, $opt$Rem(7L, -9L));
73    expectEquals(-7L, $opt$Rem(-7L, 9L));
74    expectEquals(-7L, $opt$Rem(-7L, -9L));
75
76    expectEquals(0L, $opt$Rem(Long.MAX_VALUE, 1L));
77    expectEquals(0L, $opt$Rem(Long.MAX_VALUE, -1L));
78    expectEquals(0L, $opt$Rem(Long.MIN_VALUE, 1L));
79    expectEquals(0L, $opt$Rem(Long.MIN_VALUE, -1L)); // no overflow
80    expectEquals(-1L, $opt$Rem(Long.MIN_VALUE, Long.MAX_VALUE));
81    expectEquals(Long.MAX_VALUE, $opt$Rem(Long.MAX_VALUE, Long.MIN_VALUE));
82
83    expectEquals(0L, $opt$Rem(0L, 7L));
84    expectEquals(0L, $opt$Rem(0L, Long.MAX_VALUE));
85    expectEquals(0L, $opt$Rem(0L, Long.MIN_VALUE));
86
87    expectDivisionByZero(0L);
88    expectDivisionByZero(1L);
89    expectDivisionByZero(5L);
90    expectDivisionByZero(Long.MAX_VALUE);
91    expectDivisionByZero(Long.MIN_VALUE);
92  }
93
94  static int $opt$Rem(int a, int b) {
95    return a % b;
96  }
97
98  static int $opt$RemZero(int a) {
99    return a % 0;
100  }
101
102  // Modulo by literals != 0 should not generate checks.
103  static int $opt$RemConst(int a) {
104    return a % 4;
105  }
106
107  static long $opt$RemConst(long a) {
108    return a % 4L;
109  }
110
111  static long $opt$Rem(long a, long b) {
112    return a % b;
113  }
114
115  static long $opt$RemZero(long a) {
116    return a % 0L;
117  }
118
119  public static void expectEquals(int expected, int result) {
120    if (expected != result) {
121      throw new Error("Expected: " + expected + ", found: " + result);
122    }
123  }
124
125  public static void expectEquals(long expected, long result) {
126    if (expected != result) {
127      throw new Error("Expected: " + expected + ", found: " + result);
128    }
129  }
130
131  public static void expectDivisionByZero(int value) {
132    try {
133      $opt$Rem(value, 0);
134      throw new Error("Expected RuntimeException when modulo by 0");
135    } catch (java.lang.RuntimeException e) {
136    }
137    try {
138      $opt$RemZero(value);
139      throw new Error("Expected RuntimeException when modulo by 0");
140    } catch (java.lang.RuntimeException e) {
141    }
142  }
143
144  public static void expectDivisionByZero(long value) {
145    try {
146      $opt$Rem(value, 0L);
147      throw new Error("Expected RuntimeException when modulo by 0");
148    } catch (java.lang.RuntimeException e) {
149    }
150    try {
151      $opt$RemZero(value);
152      throw new Error("Expected RuntimeException when modulo by 0");
153    } catch (java.lang.RuntimeException e) {
154    }
155  }
156
157}
158