1 | //===-- Utility class to test floor[f|l] ------------------------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | #include "src/__support/CPP/algorithm.h" |
10 | #include "src/__support/FPUtil/BasicOperations.h" |
11 | #include "src/__support/FPUtil/NearestIntegerOperations.h" |
12 | #include "test/UnitTest/FEnvSafeTest.h" |
13 | #include "test/UnitTest/FPMatcher.h" |
14 | #include "test/UnitTest/Test.h" |
15 | |
16 | #include "hdr/math_macros.h" |
17 | |
18 | template <typename T> |
19 | class ModfTest : public LIBC_NAMESPACE::testing::FEnvSafeTest { |
20 | |
21 | DECLARE_SPECIAL_CONSTANTS(T) |
22 | |
23 | public: |
24 | typedef T (*ModfFunc)(T, T *); |
25 | |
26 | void testSpecialNumbers(ModfFunc func) { |
27 | T integral; |
28 | |
29 | EXPECT_FP_EQ(zero, func(zero, &integral)); |
30 | EXPECT_FP_EQ(integral, zero); |
31 | EXPECT_FP_EQ(neg_zero, func(neg_zero, &integral)); |
32 | EXPECT_FP_EQ(integral, neg_zero); |
33 | |
34 | EXPECT_FP_EQ(zero, func(inf, &integral)); |
35 | EXPECT_FP_EQ(inf, integral); |
36 | EXPECT_FP_EQ(neg_zero, func(neg_inf, &integral)); |
37 | EXPECT_FP_EQ(neg_inf, integral); |
38 | |
39 | EXPECT_FP_EQ(aNaN, func(aNaN, &integral)); |
40 | } |
41 | |
42 | void testIntegers(ModfFunc func) { |
43 | T integral; |
44 | |
45 | EXPECT_FP_EQ(T(0.0), func(T(1.0), &integral)); |
46 | EXPECT_FP_EQ(T(1.0), integral); |
47 | |
48 | EXPECT_FP_EQ(T(-0.0), func(T(-1.0), &integral)); |
49 | EXPECT_FP_EQ(T(-1.0), integral); |
50 | |
51 | EXPECT_FP_EQ(T(0.0), func(T(10.0), &integral)); |
52 | EXPECT_FP_EQ(T(10.0), integral); |
53 | |
54 | EXPECT_FP_EQ(T(-0.0), func(T(-10.0), &integral)); |
55 | EXPECT_FP_EQ(T(-10.0), integral); |
56 | |
57 | EXPECT_FP_EQ(T(0.0), func(T(12345.0), &integral)); |
58 | EXPECT_FP_EQ(T(12345.0), integral); |
59 | |
60 | EXPECT_FP_EQ(T(-0.0), func(T(-12345.0), &integral)); |
61 | EXPECT_FP_EQ(T(-12345.0), integral); |
62 | } |
63 | |
64 | void testFractions(ModfFunc func) { |
65 | T integral; |
66 | |
67 | EXPECT_FP_EQ(T(0.5), func(T(1.5), &integral)); |
68 | EXPECT_FP_EQ(integral, T(1.0)); |
69 | |
70 | EXPECT_FP_EQ(T(-0.5), func(T(-1.5), &integral)); |
71 | EXPECT_FP_EQ(integral, T(-1.0)); |
72 | |
73 | EXPECT_FP_EQ(T(0.75), func(T(10.75), &integral)); |
74 | EXPECT_FP_EQ(integral, T(10.0)); |
75 | |
76 | EXPECT_FP_EQ(T(-0.75), func(T(-10.75), &integral)); |
77 | EXPECT_FP_EQ(integral, T(-10.0)); |
78 | |
79 | EXPECT_FP_EQ(T(0.125), func(T(100.125), &integral)); |
80 | EXPECT_FP_EQ(integral, T(100.0)); |
81 | |
82 | EXPECT_FP_EQ(T(-0.125), func(T(-100.125), &integral)); |
83 | EXPECT_FP_EQ(integral, T(-100.0)); |
84 | } |
85 | |
86 | void testRange(ModfFunc func) { |
87 | constexpr int COUNT = 100'000; |
88 | constexpr StorageType STEP = LIBC_NAMESPACE::cpp::max( |
89 | static_cast<StorageType>(STORAGE_MAX / COUNT), StorageType(1)); |
90 | StorageType v = 0; |
91 | for (int i = 0; i <= COUNT; ++i, v += STEP) { |
92 | FPBits x_bits(v); |
93 | if (x_bits.is_zero() || x_bits.is_inf_or_nan()) |
94 | continue; |
95 | |
96 | T x = x_bits.get_val(); |
97 | |
98 | T integral; |
99 | T frac = func(x, &integral); |
100 | ASSERT_TRUE(LIBC_NAMESPACE::fputil::abs(frac) < T(1.0)); |
101 | ASSERT_TRUE(LIBC_NAMESPACE::fputil::trunc(x) == integral); |
102 | ASSERT_TRUE(integral + frac == x); |
103 | } |
104 | } |
105 | }; |
106 | |
107 | #define LIST_MODF_TESTS(T, func) \ |
108 | using LlvmLibcModfTest = ModfTest<T>; \ |
109 | TEST_F(LlvmLibcModfTest, SpecialNumbers) { testSpecialNumbers(&func); } \ |
110 | TEST_F(LlvmLibcModfTest, RoundedNubmers) { testIntegers(&func); } \ |
111 | TEST_F(LlvmLibcModfTest, Fractions) { testFractions(&func); } \ |
112 | TEST_F(LlvmLibcModfTest, Range) { testRange(&func); } |
113 | |