1 //===-- Utility class to test roundeven[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 #ifndef LLVM_LIBC_TEST_SRC_MATH_ROUNDEVENTEST_H 10 #define LLVM_LIBC_TEST_SRC_MATH_ROUNDEVENTEST_H 11 12 #include "test/UnitTest/FEnvSafeTest.h" 13 #include "test/UnitTest/FPMatcher.h" 14 #include "test/UnitTest/Test.h" 15 #include "utils/MPFRWrapper/MPFRUtils.h" 16 17 #include "hdr/math_macros.h" 18 19 namespace mpfr = LIBC_NAMESPACE::testing::mpfr; 20 21 template <typename T> 22 class RoundEvenTest : public LIBC_NAMESPACE::testing::FEnvSafeTest { 23 24 DECLARE_SPECIAL_CONSTANTS(T) 25 26 public: 27 typedef T (*RoundEvenFunc)(T); 28 testSpecialNumbers(RoundEvenFunc func)29 void testSpecialNumbers(RoundEvenFunc func) { 30 EXPECT_FP_EQ(zero, func(zero)); 31 EXPECT_FP_EQ(neg_zero, func(neg_zero)); 32 33 EXPECT_FP_EQ(inf, func(inf)); 34 EXPECT_FP_EQ(neg_inf, func(neg_inf)); 35 36 EXPECT_FP_EQ(aNaN, func(aNaN)); 37 } 38 testRoundedNumbers(RoundEvenFunc func)39 void testRoundedNumbers(RoundEvenFunc func) { 40 EXPECT_FP_EQ(T(1.0), func(T(1.0))); 41 EXPECT_FP_EQ(T(-1.0), func(T(-1.0))); 42 EXPECT_FP_EQ(T(10.0), func(T(10.0))); 43 EXPECT_FP_EQ(T(-10.0), func(T(-10.0))); 44 EXPECT_FP_EQ(T(1234.0), func(T(1234.0))); 45 EXPECT_FP_EQ(T(-1234.0), func(T(-1234.0))); 46 } 47 testFractions(RoundEvenFunc func)48 void testFractions(RoundEvenFunc func) { 49 EXPECT_FP_EQ(T(0.0), func(T(0.5))); 50 EXPECT_FP_EQ(T(-0.0), func(T(-0.5))); 51 EXPECT_FP_EQ(T(0.0), func(T(0.115))); 52 EXPECT_FP_EQ(T(-0.0), func(T(-0.115))); 53 EXPECT_FP_EQ(T(1.0), func(T(0.715))); 54 EXPECT_FP_EQ(T(-1.0), func(T(-0.715))); 55 EXPECT_FP_EQ(T(1.0), func(T(1.3))); 56 EXPECT_FP_EQ(T(-1.0), func(T(-1.3))); 57 EXPECT_FP_EQ(T(2.0), func(T(1.5))); 58 EXPECT_FP_EQ(T(-2.0), func(T(-1.5))); 59 EXPECT_FP_EQ(T(2.0), func(T(1.75))); 60 EXPECT_FP_EQ(T(-2.0), func(T(-1.75))); 61 EXPECT_FP_EQ(T(11.0), func(T(10.65))); 62 EXPECT_FP_EQ(T(-11.0), func(T(-10.65))); 63 EXPECT_FP_EQ(T(1233.0), func(T(1233.25))); 64 EXPECT_FP_EQ(T(1234.0), func(T(1233.50))); 65 EXPECT_FP_EQ(T(1234.0), func(T(1233.75))); 66 EXPECT_FP_EQ(T(-1233.0), func(T(-1233.25))); 67 EXPECT_FP_EQ(T(-1234.0), func(T(-1233.50))); 68 EXPECT_FP_EQ(T(-1234.0), func(T(-1233.75))); 69 EXPECT_FP_EQ(T(1234.0), func(T(1234.50))); 70 EXPECT_FP_EQ(T(-1234.0), func(T(-1234.50))); 71 } 72 testRange(RoundEvenFunc func)73 void testRange(RoundEvenFunc func) { 74 constexpr StorageType COUNT = 100'000; 75 constexpr StorageType STEP = STORAGE_MAX / COUNT; 76 for (StorageType i = 0, v = 0; i <= COUNT; ++i, v += STEP) { 77 T x = FPBits(v).get_val(); 78 if (isnan(x) || isinf(x)) 79 continue; 80 81 ASSERT_MPFR_MATCH(mpfr::Operation::RoundEven, x, func(x), 0.0); 82 } 83 } 84 }; 85 86 #define LIST_ROUNDEVEN_TESTS(T, func) \ 87 using LlvmLibcRoundEvenTest = RoundEvenTest<T>; \ 88 TEST_F(LlvmLibcRoundEvenTest, SpecialNumbers) { testSpecialNumbers(&func); } \ 89 TEST_F(LlvmLibcRoundEvenTest, RoundedNubmers) { testRoundedNumbers(&func); } \ 90 TEST_F(LlvmLibcRoundEvenTest, Fractions) { testFractions(&func); } \ 91 TEST_F(LlvmLibcRoundEvenTest, Range) { testRange(&func); } 92 93 #endif // LLVM_LIBC_TEST_SRC_MATH_ROUNDEVENTEST_H 94