1 //===-- Utility class to test round[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_ROUNDTEST_H 10 #define LLVM_LIBC_TEST_SRC_MATH_ROUNDTEST_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 RoundTest : public LIBC_NAMESPACE::testing::FEnvSafeTest { 23 24 DECLARE_SPECIAL_CONSTANTS(T) 25 26 public: 27 typedef T (*RoundFunc)(T); 28 testSpecialNumbers(RoundFunc func)29 void testSpecialNumbers(RoundFunc 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(RoundFunc func)39 void testRoundedNumbers(RoundFunc 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(RoundFunc func)48 void testFractions(RoundFunc func) { 49 EXPECT_FP_EQ(T(1.0), func(T(0.5))); 50 EXPECT_FP_EQ(T(-1.0), 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(10.0), func(T(10.32))); 62 EXPECT_FP_EQ(T(-10.0), func(T(-10.32))); 63 EXPECT_FP_EQ(T(11.0), func(T(10.65))); 64 EXPECT_FP_EQ(T(-11.0), func(T(-10.65))); 65 EXPECT_FP_EQ(T(1234.0), func(T(1234.38))); 66 EXPECT_FP_EQ(T(-1234.0), func(T(-1234.38))); 67 EXPECT_FP_EQ(T(1235.0), func(T(1234.96))); 68 EXPECT_FP_EQ(T(-1235.0), func(T(-1234.96))); 69 } 70 testRange(RoundFunc func)71 void testRange(RoundFunc func) { 72 constexpr StorageType COUNT = 100'000; 73 constexpr StorageType STEP = STORAGE_MAX / COUNT; 74 for (StorageType i = 0, v = 0; i <= COUNT; ++i, v += STEP) { 75 T x = FPBits(v).get_val(); 76 if (isnan(x) || isinf(x)) 77 continue; 78 79 ASSERT_MPFR_MATCH(mpfr::Operation::Round, x, func(x), 0.0); 80 } 81 } 82 }; 83 84 #define LIST_ROUND_TESTS(T, func) \ 85 using LlvmLibcRoundTest = RoundTest<T>; \ 86 TEST_F(LlvmLibcRoundTest, SpecialNumbers) { testSpecialNumbers(&func); } \ 87 TEST_F(LlvmLibcRoundTest, RoundedNubmers) { testRoundedNumbers(&func); } \ 88 TEST_F(LlvmLibcRoundTest, Fractions) { testFractions(&func); } \ 89 TEST_F(LlvmLibcRoundTest, Range) { testRange(&func); } 90 91 #endif // LLVM_LIBC_TEST_SRC_MATH_ROUNDTEST_H 92