1 //===-- Utility class to test copysign[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 "test/UnitTest/FEnvSafeTest.h" 10 #include "test/UnitTest/FPMatcher.h" 11 #include "test/UnitTest/Test.h" 12 #include "utils/MPFRWrapper/MPFRUtils.h" 13 14 #include "hdr/math_macros.h" 15 16 namespace mpfr = LIBC_NAMESPACE::testing::mpfr; 17 18 template <typename T> 19 class CopySignTest : public LIBC_NAMESPACE::testing::FEnvSafeTest { 20 21 DECLARE_SPECIAL_CONSTANTS(T) 22 23 public: 24 typedef T (*CopySignFunc)(T, T); 25 testSpecialNumbers(CopySignFunc func)26 void testSpecialNumbers(CopySignFunc func) { 27 EXPECT_FP_EQ(aNaN, func(aNaN, -1.0)); 28 EXPECT_FP_EQ(aNaN, func(aNaN, 1.0)); 29 30 EXPECT_FP_EQ(neg_inf, func(inf, -1.0)); 31 EXPECT_FP_EQ(inf, func(neg_inf, 1.0)); 32 33 EXPECT_FP_EQ(neg_zero, func(zero, -1.0)); 34 EXPECT_FP_EQ(zero, func(neg_zero, 1.0)); 35 } 36 testRange(CopySignFunc func)37 void testRange(CopySignFunc func) { 38 constexpr StorageType COUNT = 100'000; 39 constexpr StorageType STEP = STORAGE_MAX / COUNT; 40 for (StorageType i = 0, v = 0; i <= COUNT; ++i, v += STEP) { 41 T x = FPBits(v).get_val(); 42 if (FPBits(v).is_nan() || FPBits(v).is_inf()) 43 continue; 44 45 double res1 = func(x, -x); 46 ASSERT_FP_EQ(res1, -x); 47 48 double res2 = func(x, x); 49 ASSERT_FP_EQ(res2, x); 50 } 51 } 52 }; 53 54 #define LIST_COPYSIGN_TESTS(T, func) \ 55 using LlvmLibcCopySignTest = CopySignTest<T>; \ 56 TEST_F(LlvmLibcCopySignTest, SpecialNumbers) { testSpecialNumbers(&func); } \ 57 TEST_F(LlvmLibcCopySignTest, Range) { testRange(&func); } 58