1//===-- Utility class to test fabs[f|l] -------------------------*- C++ -*-===//
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#ifndef LLVM_LIBC_TEST_SRC_MATH_FABSTEST_H
10#define LLVM_LIBC_TEST_SRC_MATH_FABSTEST_H
11
12#include "test/UnitTest/FEnvSafeTest.h"
13#include "test/UnitTest/FPMatcher.h"
14#include "test/UnitTest/Test.h"
15#include "utils/MPFRWrapper/MPFRUtils.h"
16
17#include "hdr/math_macros.h"
18
19namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
20
21template <typename T>
22class FAbsTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
23
24 DECLARE_SPECIAL_CONSTANTS(T)
25
26public:
27 typedef T (*FabsFunc)(T);
28
29 void testSpecialNumbers(FabsFunc func) {
30 EXPECT_FP_EQ(aNaN, func(aNaN));
31
32 EXPECT_FP_EQ(inf, func(inf));
33 EXPECT_FP_EQ(inf, func(neg_inf));
34
35 EXPECT_FP_EQ(zero, func(zero));
36 EXPECT_FP_EQ(zero, func(neg_zero));
37 }
38
39 void testRange(FabsFunc func) {
40 constexpr StorageType COUNT = 100'000;
41 constexpr StorageType STEP = STORAGE_MAX / COUNT;
42 for (StorageType i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
43 T x = FPBits(v).get_val();
44 if (FPBits(v).is_nan() || FPBits(v).is_inf())
45 continue;
46 ASSERT_MPFR_MATCH(mpfr::Operation::Abs, x, func(x), 0.0);
47 }
48 }
49};
50
51#define LIST_FABS_TESTS(T, func) \
52 using LlvmLibcFAbsTest = FAbsTest<T>; \
53 TEST_F(LlvmLibcFAbsTest, SpecialNumbers) { testSpecialNumbers(&func); } \
54 TEST_F(LlvmLibcFAbsTest, Range) { testRange(&func); }
55
56#endif // LLVM_LIBC_TEST_SRC_MATH_FABSTEST_H
57

source code of libc/test/src/math/FAbsTest.h