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
|
//===-- Unittests for copysign --------------------------------------------===//
//
// 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/copysign.h"
#include "utils/FPUtil/FPBits.h"
#include "utils/FPUtil/TestHelpers.h"
#include "utils/UnitTest/Test.h"
using FPBits = __llvm_libc::fputil::FPBits<double>;
DECLARE_SPECIAL_CONSTANTS(double)
TEST(CopySignTest, SpecialNumbers) {
EXPECT_FP_EQ(nan, __llvm_libc::copysign(nan, -1.0));
EXPECT_FP_EQ(nan, __llvm_libc::copysign(nan, 1.0));
EXPECT_FP_EQ(negInf, __llvm_libc::copysign(inf, -1.0));
EXPECT_FP_EQ(inf, __llvm_libc::copysign(negInf, 1.0));
EXPECT_FP_EQ(negZero, __llvm_libc::copysign(zero, -1.0));
EXPECT_FP_EQ(zero, __llvm_libc::copysign(negZero, 1.0));
}
TEST(CopySignTest, 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) {
double x = FPBits(v);
if (isnan(x) || isinf(x) || x == 0)
continue;
double res1 = __llvm_libc::copysign(x, -x);
ASSERT_FP_EQ(res1, -x);
double res2 = __llvm_libc::copysign(x, x);
ASSERT_FP_EQ(res2, x);
}
}
|
