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 "src/__support/CPP/algorithm.h" 13 #include "test/UnitTest/FEnvSafeTest.h" 14 #include "test/UnitTest/FPMatcher.h" 15 #include "test/UnitTest/Test.h" 16 #include "utils/MPFRWrapper/MPFRUtils.h" 17 18 #include "hdr/math_macros.h" 19 20 namespace mpfr = LIBC_NAMESPACE::testing::mpfr; 21 22 template <typename T> 23 class RoundEvenTest : public LIBC_NAMESPACE::testing::FEnvSafeTest { 24 25 DECLARE_SPECIAL_CONSTANTS(T) 26 27 public: 28 typedef T (*RoundEvenFunc)(T); 29 testSpecialNumbers(RoundEvenFunc func)30 void testSpecialNumbers(RoundEvenFunc func) { 31 EXPECT_FP_EQ(zero, func(zero)); 32 EXPECT_FP_EQ(neg_zero, func(neg_zero)); 33 34 EXPECT_FP_EQ(inf, func(inf)); 35 EXPECT_FP_EQ(neg_inf, func(neg_inf)); 36 37 EXPECT_FP_EQ(aNaN, func(aNaN)); 38 } 39 testRoundedNumbers(RoundEvenFunc func)40 void testRoundedNumbers(RoundEvenFunc func) { 41 EXPECT_FP_EQ(T(1.0), func(T(1.0))); 42 EXPECT_FP_EQ(T(-1.0), func(T(-1.0))); 43 EXPECT_FP_EQ(T(10.0), func(T(10.0))); 44 EXPECT_FP_EQ(T(-10.0), func(T(-10.0))); 45 EXPECT_FP_EQ(T(1234.0), func(T(1234.0))); 46 EXPECT_FP_EQ(T(-1234.0), func(T(-1234.0))); 47 } 48 testFractions(RoundEvenFunc func)49 void testFractions(RoundEvenFunc func) { 50 EXPECT_FP_EQ(T(0.0), func(T(0.5))); 51 EXPECT_FP_EQ(T(-0.0), func(T(-0.5))); 52 EXPECT_FP_EQ(T(0.0), func(T(0.115))); 53 EXPECT_FP_EQ(T(-0.0), func(T(-0.115))); 54 EXPECT_FP_EQ(T(1.0), func(T(0.715))); 55 EXPECT_FP_EQ(T(-1.0), func(T(-0.715))); 56 EXPECT_FP_EQ(T(1.0), func(T(1.3))); 57 EXPECT_FP_EQ(T(-1.0), func(T(-1.3))); 58 EXPECT_FP_EQ(T(2.0), func(T(1.5))); 59 EXPECT_FP_EQ(T(-2.0), func(T(-1.5))); 60 EXPECT_FP_EQ(T(2.0), func(T(1.75))); 61 EXPECT_FP_EQ(T(-2.0), func(T(-1.75))); 62 EXPECT_FP_EQ(T(11.0), func(T(10.65))); 63 EXPECT_FP_EQ(T(-11.0), func(T(-10.65))); 64 EXPECT_FP_EQ(T(123.0), func(T(123.25))); 65 EXPECT_FP_EQ(T(124.0), func(T(123.50))); 66 EXPECT_FP_EQ(T(124.0), func(T(123.75))); 67 EXPECT_FP_EQ(T(-123.0), func(T(-123.25))); 68 EXPECT_FP_EQ(T(-124.0), func(T(-123.50))); 69 EXPECT_FP_EQ(T(-124.0), func(T(-123.75))); 70 EXPECT_FP_EQ(T(124.0), func(T(124.50))); 71 EXPECT_FP_EQ(T(-124.0), func(T(-124.50))); 72 } 73 testRange(RoundEvenFunc func)74 void testRange(RoundEvenFunc func) { 75 constexpr int COUNT = 100'000; 76 constexpr StorageType STEP = LIBC_NAMESPACE::cpp::max( 77 static_cast<StorageType>(STORAGE_MAX / COUNT), StorageType(1)); 78 StorageType v = 0; 79 for (int i = 0; i <= COUNT; ++i, v += STEP) { 80 FPBits xbits(v); 81 T x = xbits.get_val(); 82 if (xbits.is_inf_or_nan()) 83 continue; 84 85 ASSERT_MPFR_MATCH(mpfr::Operation::RoundEven, x, func(x), 0.0); 86 } 87 } 88 }; 89 90 #define LIST_ROUNDEVEN_TESTS(T, func) \ 91 using LlvmLibcRoundEvenTest = RoundEvenTest<T>; \ 92 TEST_F(LlvmLibcRoundEvenTest, SpecialNumbers) { testSpecialNumbers(&func); } \ 93 TEST_F(LlvmLibcRoundEvenTest, RoundedNubmers) { testRoundedNumbers(&func); } \ 94 TEST_F(LlvmLibcRoundEvenTest, Fractions) { testFractions(&func); } \ 95 TEST_F(LlvmLibcRoundEvenTest, Range) { testRange(&func); } 96 97 #endif // LLVM_LIBC_TEST_SRC_MATH_ROUNDEVENTEST_H 98