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