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 #ifndef LLVM_LIBC_TEST_SRC_MATH_SMOKE_COPYSIGNTEST_H 10 #define LLVM_LIBC_TEST_SRC_MATH_SMOKE_COPYSIGNTEST_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 17 #include "hdr/math_macros.h" 18 19 template <typename T> 20 class CopySignTest : public LIBC_NAMESPACE::testing::FEnvSafeTest { 21 22 DECLARE_SPECIAL_CONSTANTS(T) 23 24 public: 25 typedef T (*CopySignFunc)(T, T); 26 testSpecialNumbers(CopySignFunc func)27 void testSpecialNumbers(CopySignFunc func) { 28 EXPECT_FP_EQ(aNaN, func(aNaN, T(-1.0))); 29 EXPECT_FP_EQ(aNaN, func(aNaN, T(1.0))); 30 31 EXPECT_FP_EQ(neg_inf, func(inf, T(-1.0))); 32 EXPECT_FP_EQ(inf, func(neg_inf, T(1.0))); 33 34 EXPECT_FP_EQ(neg_zero, func(zero, T(-1.0))); 35 EXPECT_FP_EQ(zero, func(neg_zero, T(1.0))); 36 } 37 testRange(CopySignFunc func)38 void testRange(CopySignFunc func) { 39 constexpr int COUNT = 100'000; 40 constexpr StorageType STEP = LIBC_NAMESPACE::cpp::max( 41 static_cast<StorageType>(STORAGE_MAX / COUNT), StorageType(1)); 42 StorageType v = 0; 43 for (int i = 0; i <= COUNT; ++i, v += STEP) { 44 FPBits x_bits = FPBits(v); 45 if (x_bits.is_nan() || x_bits.is_inf()) 46 continue; 47 T x = x_bits.get_val(); 48 49 T res1 = func(x, -x); 50 ASSERT_FP_EQ(res1, -x); 51 52 T res2 = func(x, x); 53 ASSERT_FP_EQ(res2, x); 54 } 55 } 56 }; 57 58 #define LIST_COPYSIGN_TESTS(T, func) \ 59 using LlvmLibcCopySignTest = CopySignTest<T>; \ 60 TEST_F(LlvmLibcCopySignTest, SpecialNumbers) { testSpecialNumbers(&func); } \ 61 TEST_F(LlvmLibcCopySignTest, Range) { testRange(&func); } 62 63 #endif // LLVM_LIBC_TEST_SRC_MATH_SMOKE_COPYSIGNTEST_H 64