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//===-- Utility class to test copysign[f|l] ---------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "test/UnitTest/FEnvSafeTest.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"
#include "utils/MPFRWrapper/MPFRUtils.h"
#include "hdr/math_macros.h"
namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
template <typename T>
class CopySignTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
DECLARE_SPECIAL_CONSTANTS(T)
public:
typedef T (*CopySignFunc)(T, T);
void testSpecialNumbers(CopySignFunc func) {
EXPECT_FP_EQ(aNaN, func(aNaN, -1.0));
EXPECT_FP_EQ(aNaN, func(aNaN, 1.0));
EXPECT_FP_EQ(neg_inf, func(inf, -1.0));
EXPECT_FP_EQ(inf, func(neg_inf, 1.0));
EXPECT_FP_EQ(neg_zero, func(zero, -1.0));
EXPECT_FP_EQ(zero, func(neg_zero, 1.0));
}
void testRange(CopySignFunc func) {
constexpr StorageType COUNT = 100'000;
constexpr StorageType STEP = STORAGE_MAX / COUNT;
for (StorageType i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
T x = FPBits(v).get_val();
if (FPBits(v).is_nan() || FPBits(v).is_inf())
continue;
T res1 = func(x, -x);
ASSERT_FP_EQ(res1, -x);
T res2 = func(x, x);
ASSERT_FP_EQ(res2, x);
}
}
};
#define LIST_COPYSIGN_TESTS(T, func) \
using LlvmLibcCopySignTest = CopySignTest<T>; \
TEST_F(LlvmLibcCopySignTest, SpecialNumbers) { testSpecialNumbers(&func); } \
TEST_F(LlvmLibcCopySignTest, Range) { testRange(&func); }
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