1 // Copyright 2019 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include <stddef.h>
16 #include <stdint.h>
17
18 #include <limits>
19
20 #include "hwy/base.h"
21
22 #undef HWY_TARGET_INCLUDE
23 #define HWY_TARGET_INCLUDE "base_test.cc"
24 #include "hwy/foreach_target.h"
25 #include "hwy/highway.h"
26 #include "hwy/tests/test_util-inl.h"
27
28 HWY_BEFORE_NAMESPACE();
29 namespace hwy {
30 namespace HWY_NAMESPACE {
31
TestAllLimits()32 HWY_NOINLINE void TestAllLimits() {
33 HWY_ASSERT_EQ(uint8_t(0), LimitsMin<uint8_t>());
34 HWY_ASSERT_EQ(uint16_t(0), LimitsMin<uint16_t>());
35 HWY_ASSERT_EQ(uint32_t(0), LimitsMin<uint32_t>());
36 HWY_ASSERT_EQ(uint64_t(0), LimitsMin<uint64_t>());
37
38 HWY_ASSERT_EQ(int8_t(-128), LimitsMin<int8_t>());
39 HWY_ASSERT_EQ(int16_t(-32768), LimitsMin<int16_t>());
40 HWY_ASSERT_EQ(int32_t(0x80000000u), LimitsMin<int32_t>());
41 HWY_ASSERT_EQ(int64_t(0x8000000000000000ull), LimitsMin<int64_t>());
42
43 HWY_ASSERT_EQ(uint8_t(0xFF), LimitsMax<uint8_t>());
44 HWY_ASSERT_EQ(uint16_t(0xFFFF), LimitsMax<uint16_t>());
45 HWY_ASSERT_EQ(uint32_t(0xFFFFFFFFu), LimitsMax<uint32_t>());
46 HWY_ASSERT_EQ(uint64_t(0xFFFFFFFFFFFFFFFFull), LimitsMax<uint64_t>());
47
48 HWY_ASSERT_EQ(int8_t(0x7F), LimitsMax<int8_t>());
49 HWY_ASSERT_EQ(int16_t(0x7FFF), LimitsMax<int16_t>());
50 HWY_ASSERT_EQ(int32_t(0x7FFFFFFFu), LimitsMax<int32_t>());
51 HWY_ASSERT_EQ(int64_t(0x7FFFFFFFFFFFFFFFull), LimitsMax<int64_t>());
52 }
53
54 struct TestLowestHighest {
55 template <class T>
operator ()hwy::HWY_NAMESPACE::TestLowestHighest56 HWY_NOINLINE void operator()(T /*unused*/) const {
57 HWY_ASSERT_EQ(std::numeric_limits<T>::lowest(), LowestValue<T>());
58 HWY_ASSERT_EQ(std::numeric_limits<T>::max(), HighestValue<T>());
59 }
60 };
61
TestAllLowestHighest()62 HWY_NOINLINE void TestAllLowestHighest() { ForAllTypes(TestLowestHighest()); }
63 struct TestIsUnsigned {
64 template <class T>
operator ()hwy::HWY_NAMESPACE::TestIsUnsigned65 HWY_NOINLINE void operator()(T /*unused*/) const {
66 static_assert(!IsFloat<T>(), "Expected !IsFloat");
67 static_assert(!IsSigned<T>(), "Expected !IsSigned");
68 }
69 };
70
71 struct TestIsSigned {
72 template <class T>
operator ()hwy::HWY_NAMESPACE::TestIsSigned73 HWY_NOINLINE void operator()(T /*unused*/) const {
74 static_assert(!IsFloat<T>(), "Expected !IsFloat");
75 static_assert(IsSigned<T>(), "Expected IsSigned");
76 }
77 };
78
79 struct TestIsFloat {
80 template <class T>
operator ()hwy::HWY_NAMESPACE::TestIsFloat81 HWY_NOINLINE void operator()(T /*unused*/) const {
82 static_assert(IsFloat<T>(), "Expected IsFloat");
83 static_assert(IsSigned<T>(), "Floats are also considered signed");
84 }
85 };
86
TestAllType()87 HWY_NOINLINE void TestAllType() {
88 ForUnsignedTypes(TestIsUnsigned());
89 ForSignedTypes(TestIsSigned());
90 ForFloatTypes(TestIsFloat());
91 }
92
TestAllPopCount()93 HWY_NOINLINE void TestAllPopCount() {
94 HWY_ASSERT_EQ(size_t(0), PopCount(0u));
95 HWY_ASSERT_EQ(size_t(1), PopCount(1u));
96 HWY_ASSERT_EQ(size_t(1), PopCount(2u));
97 HWY_ASSERT_EQ(size_t(2), PopCount(3u));
98 HWY_ASSERT_EQ(size_t(1), PopCount(0x80000000u));
99 HWY_ASSERT_EQ(size_t(31), PopCount(0x7FFFFFFFu));
100 HWY_ASSERT_EQ(size_t(32), PopCount(0xFFFFFFFFu));
101
102 HWY_ASSERT_EQ(size_t(1), PopCount(0x80000000ull));
103 HWY_ASSERT_EQ(size_t(31), PopCount(0x7FFFFFFFull));
104 HWY_ASSERT_EQ(size_t(32), PopCount(0xFFFFFFFFull));
105 HWY_ASSERT_EQ(size_t(33), PopCount(0x10FFFFFFFFull));
106 HWY_ASSERT_EQ(size_t(63), PopCount(0xFFFEFFFFFFFFFFFFull));
107 HWY_ASSERT_EQ(size_t(64), PopCount(0xFFFFFFFFFFFFFFFFull));
108 }
109
110 // NOLINTNEXTLINE(google-readability-namespace-comments)
111 } // namespace HWY_NAMESPACE
112 } // namespace hwy
113 HWY_AFTER_NAMESPACE();
114
115 #if HWY_ONCE
116 namespace hwy {
117 HWY_BEFORE_TEST(BaseTest);
118 HWY_EXPORT_AND_TEST_P(BaseTest, TestAllLimits);
119 HWY_EXPORT_AND_TEST_P(BaseTest, TestAllLowestHighest);
120 HWY_EXPORT_AND_TEST_P(BaseTest, TestAllType);
121 HWY_EXPORT_AND_TEST_P(BaseTest, TestAllPopCount);
122 } // namespace hwy
123 #endif
124