copysignl_test.cpp
1.52 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
//===-- Unittests for copysignl
//--------------------------------------------===//
//
// 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 "include/math.h"
#include "src/math/copysignl.h"
#include "utils/FPUtil/FPBits.h"
#include "utils/UnitTest/Test.h"
using FPBits = __llvm_libc::fputil::FPBits<long double>;
TEST(CopysignlTest, SpecialNumbers) {
EXPECT_TRUE(FPBits::negZero() ==
__llvm_libc::copysignl(FPBits::zero(), -1.0l));
EXPECT_TRUE(FPBits::zero() ==
__llvm_libc::copysignl(FPBits::negZero(), 1.0l));
EXPECT_TRUE(FPBits::negZero() ==
__llvm_libc::copysignl(FPBits::zero(), -1.0l));
EXPECT_TRUE(FPBits::zero() ==
__llvm_libc::copysignl(FPBits::negZero(), 1.0l));
EXPECT_TRUE(
FPBits(__llvm_libc::copysignl(FPBits::buildNaN(1), -1.0l)).isNaN());
}
TEST(CopysignlTest, InDoubleRange) {
using UIntType = FPBits::UIntType;
constexpr UIntType count = 10000000;
constexpr UIntType step = UIntType(-1) / count;
for (UIntType i = 0, v = 0; i <= count; ++i, v += step) {
long double x = FPBits(v);
if (isnan(x) || isinf(x) || x == 0)
continue;
long double res1 = __llvm_libc::copysignl(x, -x);
ASSERT_TRUE(res1 == -x);
long double res2 = __llvm_libc::copysignl(x, x);
ASSERT_TRUE(res2 == x);
}
}