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
18template <typename T>
19class ModfTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
20
21 DECLARE_SPECIAL_CONSTANTS(T)
22
23public:
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

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source code of libc/test/src/math/smoke/ModfTest.h