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 testSpecialNumbers(ModfFunc func)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 testIntegers(ModfFunc func)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 testFractions(ModfFunc func)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 testRange(ModfFunc func)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