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annotate unittests/Support/MathExtrasTest.cpp @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
parents
children 60c9769439b8
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0
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1 //===- unittests/Support/MathExtrasTest.cpp - math utils tests ------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #include "gtest/gtest.h"
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11 #include "llvm/Support/MathExtras.h"
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12
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13 using namespace llvm;
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14
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15 namespace {
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16
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17 TEST(MathExtras, countTrailingZeros) {
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18 uint8_t Z8 = 0;
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19 uint16_t Z16 = 0;
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20 uint32_t Z32 = 0;
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21 uint64_t Z64 = 0;
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22 EXPECT_EQ(8u, countTrailingZeros(Z8));
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23 EXPECT_EQ(16u, countTrailingZeros(Z16));
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24 EXPECT_EQ(32u, countTrailingZeros(Z32));
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25 EXPECT_EQ(64u, countTrailingZeros(Z64));
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26
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27 uint8_t NZ8 = 42;
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28 uint16_t NZ16 = 42;
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29 uint32_t NZ32 = 42;
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30 uint64_t NZ64 = 42;
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31 EXPECT_EQ(1u, countTrailingZeros(NZ8));
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32 EXPECT_EQ(1u, countTrailingZeros(NZ16));
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33 EXPECT_EQ(1u, countTrailingZeros(NZ32));
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34 EXPECT_EQ(1u, countTrailingZeros(NZ64));
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35 }
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36
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37 TEST(MathExtras, countLeadingZeros) {
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38 uint8_t Z8 = 0;
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39 uint16_t Z16 = 0;
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40 uint32_t Z32 = 0;
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41 uint64_t Z64 = 0;
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42 EXPECT_EQ(8u, countLeadingZeros(Z8));
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43 EXPECT_EQ(16u, countLeadingZeros(Z16));
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44 EXPECT_EQ(32u, countLeadingZeros(Z32));
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45 EXPECT_EQ(64u, countLeadingZeros(Z64));
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46
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47 uint8_t NZ8 = 42;
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48 uint16_t NZ16 = 42;
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49 uint32_t NZ32 = 42;
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50 uint64_t NZ64 = 42;
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51 EXPECT_EQ(2u, countLeadingZeros(NZ8));
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52 EXPECT_EQ(10u, countLeadingZeros(NZ16));
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53 EXPECT_EQ(26u, countLeadingZeros(NZ32));
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54 EXPECT_EQ(58u, countLeadingZeros(NZ64));
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55
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56 EXPECT_EQ(8u, countLeadingZeros(0x00F000FFu));
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57 EXPECT_EQ(8u, countLeadingZeros(0x00F12345u));
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58 for (unsigned i = 0; i <= 30; ++i) {
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59 EXPECT_EQ(31 - i, countLeadingZeros(1u << i));
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60 }
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61
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62 EXPECT_EQ(8u, countLeadingZeros(0x00F1234500F12345ULL));
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63 EXPECT_EQ(1u, countLeadingZeros(1ULL << 62));
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64 for (unsigned i = 0; i <= 62; ++i) {
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65 EXPECT_EQ(63 - i, countLeadingZeros(1ULL << i));
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66 }
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67 }
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68
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69 TEST(MathExtras, findFirstSet) {
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70 uint8_t Z8 = 0;
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71 uint16_t Z16 = 0;
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72 uint32_t Z32 = 0;
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73 uint64_t Z64 = 0;
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74 EXPECT_EQ(0xFFULL, findFirstSet(Z8));
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75 EXPECT_EQ(0xFFFFULL, findFirstSet(Z16));
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76 EXPECT_EQ(0xFFFFFFFFULL, findFirstSet(Z32));
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77 EXPECT_EQ(0xFFFFFFFFFFFFFFFFULL, findFirstSet(Z64));
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78
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79 uint8_t NZ8 = 42;
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80 uint16_t NZ16 = 42;
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81 uint32_t NZ32 = 42;
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82 uint64_t NZ64 = 42;
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83 EXPECT_EQ(1u, findFirstSet(NZ8));
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84 EXPECT_EQ(1u, findFirstSet(NZ16));
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85 EXPECT_EQ(1u, findFirstSet(NZ32));
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86 EXPECT_EQ(1u, findFirstSet(NZ64));
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87 }
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88
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89 TEST(MathExtras, findLastSet) {
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90 uint8_t Z8 = 0;
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91 uint16_t Z16 = 0;
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92 uint32_t Z32 = 0;
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93 uint64_t Z64 = 0;
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94 EXPECT_EQ(0xFFULL, findLastSet(Z8));
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95 EXPECT_EQ(0xFFFFULL, findLastSet(Z16));
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96 EXPECT_EQ(0xFFFFFFFFULL, findLastSet(Z32));
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97 EXPECT_EQ(0xFFFFFFFFFFFFFFFFULL, findLastSet(Z64));
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98
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99 uint8_t NZ8 = 42;
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100 uint16_t NZ16 = 42;
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101 uint32_t NZ32 = 42;
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102 uint64_t NZ64 = 42;
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103 EXPECT_EQ(5u, findLastSet(NZ8));
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104 EXPECT_EQ(5u, findLastSet(NZ16));
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105 EXPECT_EQ(5u, findLastSet(NZ32));
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106 EXPECT_EQ(5u, findLastSet(NZ64));
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107 }
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108
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109 TEST(MathExtras, reverseBits) {
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110 uint8_t NZ8 = 42;
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111 uint16_t NZ16 = 42;
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112 uint32_t NZ32 = 42;
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113 uint64_t NZ64 = 42;
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114 EXPECT_EQ(0x54ULL, reverseBits(NZ8));
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115 EXPECT_EQ(0x5400ULL, reverseBits(NZ16));
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116 EXPECT_EQ(0x54000000ULL, reverseBits(NZ32));
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117 EXPECT_EQ(0x5400000000000000ULL, reverseBits(NZ64));
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118 }
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119
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120 TEST(MathExtras, isPowerOf2_32) {
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121 EXPECT_TRUE(isPowerOf2_32(1 << 6));
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122 EXPECT_TRUE(isPowerOf2_32(1 << 12));
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123 EXPECT_FALSE(isPowerOf2_32((1 << 19) + 3));
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124 EXPECT_FALSE(isPowerOf2_32(0xABCDEF0));
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125 }
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126
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parents:
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127 TEST(MathExtras, isPowerOf2_64) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
128 EXPECT_TRUE(isPowerOf2_64(1LL << 46));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
129 EXPECT_TRUE(isPowerOf2_64(1LL << 12));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
130 EXPECT_FALSE(isPowerOf2_64((1LL << 53) + 3));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
131 EXPECT_FALSE(isPowerOf2_64(0xABCDEF0ABCDEF0LL));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
132 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
133
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
134 TEST(MathExtras, ByteSwap_32) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
135 EXPECT_EQ(0x44332211u, ByteSwap_32(0x11223344));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
136 EXPECT_EQ(0xDDCCBBAAu, ByteSwap_32(0xAABBCCDD));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
137 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
138
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
139 TEST(MathExtras, ByteSwap_64) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
140 EXPECT_EQ(0x8877665544332211ULL, ByteSwap_64(0x1122334455667788LL));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
141 EXPECT_EQ(0x1100FFEEDDCCBBAAULL, ByteSwap_64(0xAABBCCDDEEFF0011LL));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
142 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
143
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
144 TEST(MathExtras, CountLeadingOnes_32) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
145 for (int i = 30; i >= 0; --i) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
146 // Start with all ones and unset some bit.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
147 EXPECT_EQ(31u - i, CountLeadingOnes_32(0xFFFFFFFF ^ (1 << i)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
148 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
149 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
150
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
151 TEST(MathExtras, CountLeadingOnes_64) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
152 for (int i = 62; i >= 0; --i) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
153 // Start with all ones and unset some bit.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
154 EXPECT_EQ(63u - i, CountLeadingOnes_64(0xFFFFFFFFFFFFFFFFLL ^ (1LL << i)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
155 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
156 for (int i = 30; i >= 0; --i) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
157 // Start with all ones and unset some bit.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
158 EXPECT_EQ(31u - i, CountLeadingOnes_32(0xFFFFFFFF ^ (1 << i)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
159 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
160 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
161
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
162 TEST(MathExtras, FloatBits) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
163 static const float kValue = 5632.34f;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
164 EXPECT_FLOAT_EQ(kValue, BitsToFloat(FloatToBits(kValue)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
165 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
166
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
167 TEST(MathExtras, DoubleBits) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
168 static const double kValue = 87987234.983498;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
169 EXPECT_FLOAT_EQ(kValue, BitsToDouble(DoubleToBits(kValue)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
170 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
171
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
172 TEST(MathExtras, MinAlign) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
173 EXPECT_EQ(1u, MinAlign(2, 3));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
174 EXPECT_EQ(2u, MinAlign(2, 4));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
175 EXPECT_EQ(1u, MinAlign(17, 64));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
176 EXPECT_EQ(256u, MinAlign(256, 512));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
177 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
178
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
179 TEST(MathExtras, NextPowerOf2) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
180 EXPECT_EQ(4u, NextPowerOf2(3));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
181 EXPECT_EQ(16u, NextPowerOf2(15));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
182 EXPECT_EQ(256u, NextPowerOf2(128));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
183 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
184
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
185 TEST(MathExtras, RoundUpToAlignment) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
186 EXPECT_EQ(8u, RoundUpToAlignment(5, 8));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
187 EXPECT_EQ(24u, RoundUpToAlignment(17, 8));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
188 EXPECT_EQ(0u, RoundUpToAlignment(~0LL, 8));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
189 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
190
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
191 }