| 1 | //===-- Utility class to test copysign[f|l] ---------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #ifndef LLVM_LIBC_TEST_SRC_MATH_SMOKE_COPYSIGNTEST_H |
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| 10 | #define LLVM_LIBC_TEST_SRC_MATH_SMOKE_COPYSIGNTEST_H |
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| 11 | |
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| 12 | #include "src/__support/CPP/algorithm.h" |
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| 13 | #include "test/UnitTest/FEnvSafeTest.h" |
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| 14 | #include "test/UnitTest/FPMatcher.h" |
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| 15 | #include "test/UnitTest/Test.h" |
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| 16 | |
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| 17 | #include "hdr/math_macros.h" |
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| 18 | |
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| 19 | template <typename T> |
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| 20 | class CopySignTest : public LIBC_NAMESPACE::testing::FEnvSafeTest { |
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| 21 | |
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| 22 | DECLARE_SPECIAL_CONSTANTS(T) |
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| 23 | |
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| 24 | public: |
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| 25 | typedef T (*CopySignFunc)(T, T); |
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| 26 | |
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| 27 | void testSpecialNumbers(CopySignFunc func) { |
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| 28 | EXPECT_FP_EQ(aNaN, func(aNaN, T(-1.0))); |
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| 29 | EXPECT_FP_EQ(aNaN, func(aNaN, T(1.0))); |
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| 30 | |
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| 31 | EXPECT_FP_EQ(neg_inf, func(inf, T(-1.0))); |
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| 32 | EXPECT_FP_EQ(inf, func(neg_inf, T(1.0))); |
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| 33 | |
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| 34 | EXPECT_FP_EQ(neg_zero, func(zero, T(-1.0))); |
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| 35 | EXPECT_FP_EQ(zero, func(neg_zero, T(1.0))); |
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| 36 | } |
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| 37 | |
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| 38 | void testRange(CopySignFunc func) { |
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| 39 | constexpr int COUNT = 100'000; |
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| 40 | constexpr StorageType STEP = LIBC_NAMESPACE::cpp::max( |
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| 41 | static_cast<StorageType>(STORAGE_MAX / COUNT), StorageType(1)); |
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| 42 | StorageType v = 0; |
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| 43 | for (int i = 0; i <= COUNT; ++i, v += STEP) { |
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| 44 | FPBits x_bits = FPBits(v); |
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| 45 | if (x_bits.is_nan() || x_bits.is_inf()) |
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| 46 | continue; |
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| 47 | T x = x_bits.get_val(); |
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| 48 | |
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| 49 | T res1 = func(x, -x); |
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| 50 | ASSERT_FP_EQ(res1, -x); |
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| 51 | |
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| 52 | T res2 = func(x, x); |
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| 53 | ASSERT_FP_EQ(res2, x); |
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| 54 | } |
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| 55 | } |
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| 56 | }; |
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| 57 | |
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| 58 | #define LIST_COPYSIGN_TESTS(T, func) \ |
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| 59 | using LlvmLibcCopySignTest = CopySignTest<T>; \ |
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| 60 | TEST_F(LlvmLibcCopySignTest, SpecialNumbers) { testSpecialNumbers(&func); } \ |
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| 61 | TEST_F(LlvmLibcCopySignTest, Range) { testRange(&func); } |
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| 62 | |
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| 63 | #endif // LLVM_LIBC_TEST_SRC_MATH_SMOKE_COPYSIGNTEST_H |
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| 64 | |
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