1 //===-- Unittests for copysignf -------------------------------------------===//
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 #include "src/math/copysignf.h"
10 #include "utils/FPUtil/FPBits.h"
11 #include "utils/FPUtil/TestHelpers.h"
12 #include "utils/UnitTest/Test.h"
13 #include <math.h>
14
15 using FPBits = __llvm_libc::fputil::FPBits<float>;
16
17 DECLARE_SPECIAL_CONSTANTS(float)
18
TEST(CopySinfTest,SpecialNumbers)19 TEST(CopySinfTest, SpecialNumbers) {
20 EXPECT_FP_EQ(nan, __llvm_libc::copysignf(nan, -1.0));
21 EXPECT_FP_EQ(nan, __llvm_libc::copysignf(nan, 1.0));
22
23 EXPECT_FP_EQ(negInf, __llvm_libc::copysignf(inf, -1.0));
24 EXPECT_FP_EQ(inf, __llvm_libc::copysignf(negInf, 1.0));
25
26 EXPECT_FP_EQ(negZero, __llvm_libc::copysignf(zero, -1.0));
27 EXPECT_FP_EQ(zero, __llvm_libc::copysignf(negZero, 1.0));
28 }
29
TEST(CopySinfTest,InFloatRange)30 TEST(CopySinfTest, InFloatRange) {
31 using UIntType = FPBits::UIntType;
32 constexpr UIntType count = 1000000;
33 constexpr UIntType step = UIntType(-1) / count;
34 for (UIntType i = 0, v = 0; i <= count; ++i, v += step) {
35 float x = FPBits(v);
36 if (isnan(x) || isinf(x) || x == 0)
37 continue;
38
39 float res1 = __llvm_libc::copysignf(x, -x);
40 ASSERT_FP_EQ(res1, -x);
41
42 float res2 = __llvm_libc::copysignf(x, x);
43 ASSERT_FP_EQ(res2, x);
44 }
45 }
46