1//===-- Utility class to test fmaximum_mag_num[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_SMOKE_FMAXIMUMMAG_NUMTEST_H
10#define LLVM_LIBC_TEST_SRC_MATH_SMOKE_FMAXIMUMMAG_NUMTEST_H
11
12#include "src/__support/CPP/algorithm.h"
13#include "src/__support/FPUtil/BasicOperations.h"
14#include "src/__support/FPUtil/FPBits.h"
15#include "test/UnitTest/FEnvSafeTest.h"
16#include "test/UnitTest/FPMatcher.h"
17#include "test/UnitTest/Test.h"
18
19template <typename T>
20class FMaximumMagNumTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
21
22 DECLARE_SPECIAL_CONSTANTS(T)
23
24public:
25 typedef T (*FMaximumMagNumFunc)(T, T);
26
27 void testNaN(FMaximumMagNumFunc func) {
28 EXPECT_FP_EQ(inf, func(aNaN, inf));
29 EXPECT_FP_EQ_WITH_EXCEPTION(inf, func(sNaN, inf), FE_INVALID);
30 EXPECT_FP_EQ(neg_inf, func(neg_inf, aNaN));
31 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, func(neg_inf, sNaN), FE_INVALID);
32 EXPECT_EQ(FPBits(aNaN).uintval(), FPBits(func(aNaN, aNaN)).uintval());
33 EXPECT_FP_EQ(zero, func(aNaN, zero));
34 EXPECT_FP_EQ(neg_zero, func(neg_zero, aNaN));
35 EXPECT_FP_EQ_WITH_EXCEPTION(zero, func(sNaN, zero), FE_INVALID);
36 EXPECT_FP_EQ_WITH_EXCEPTION(neg_zero, func(neg_zero, sNaN), FE_INVALID);
37 EXPECT_FP_EQ(T(-1.2345), func(aNaN, T(-1.2345)));
38 EXPECT_FP_EQ(T(1.2345), func(T(1.2345), aNaN));
39 EXPECT_FP_EQ_WITH_EXCEPTION(T(-1.2345), func(sNaN, T(-1.2345)), FE_INVALID);
40 EXPECT_FP_EQ_WITH_EXCEPTION(T(1.2345), func(T(1.2345), sNaN), FE_INVALID);
41 EXPECT_FP_IS_NAN_WITH_EXCEPTION(func(aNaN, sNaN), FE_INVALID);
42 EXPECT_FP_IS_NAN_WITH_EXCEPTION(func(sNaN, aNaN), FE_INVALID);
43 EXPECT_EQ(FPBits(aNaN).uintval(), FPBits(func(aNaN, sNaN)).uintval());
44 EXPECT_EQ(FPBits(aNaN).uintval(), FPBits(func(sNaN, aNaN)).uintval());
45 EXPECT_EQ(FPBits(aNaN).uintval(), FPBits(func(sNaN, sNaN)).uintval());
46 }
47
48 void testInfArg(FMaximumMagNumFunc func) {
49 EXPECT_FP_EQ(inf, func(neg_inf, inf));
50 EXPECT_FP_EQ(inf, func(inf, zero));
51 EXPECT_FP_EQ(inf, func(neg_zero, inf));
52 EXPECT_FP_EQ(inf, func(inf, T(1.2345)));
53 EXPECT_FP_EQ(inf, func(T(-1.2345), inf));
54 }
55
56 void testNegInfArg(FMaximumMagNumFunc func) {
57 EXPECT_FP_EQ(inf, func(inf, neg_inf));
58 EXPECT_FP_EQ(neg_inf, func(neg_inf, zero));
59 EXPECT_FP_EQ(neg_inf, func(neg_zero, neg_inf));
60 EXPECT_FP_EQ(neg_inf, func(neg_inf, T(-1.2345)));
61 EXPECT_FP_EQ(neg_inf, func(T(1.2345), neg_inf));
62 }
63
64 void testBothZero(FMaximumMagNumFunc func) {
65 EXPECT_FP_EQ(zero, func(zero, zero));
66 EXPECT_FP_EQ(zero, func(neg_zero, zero));
67 EXPECT_FP_EQ(zero, func(zero, neg_zero));
68 EXPECT_FP_EQ(neg_zero, func(neg_zero, neg_zero));
69 }
70
71 void testRange(FMaximumMagNumFunc func) {
72 constexpr int COUNT = 100'001;
73 constexpr StorageType STEP = LIBC_NAMESPACE::cpp::max(
74 static_cast<StorageType>(STORAGE_MAX / COUNT), StorageType(1));
75 StorageType v = 0, w = STORAGE_MAX;
76 for (int i = 0; i <= COUNT; ++i, v += STEP, w -= STEP) {
77 FPBits xbits(v), ybits(w);
78 if (xbits.is_inf_or_nan())
79 continue;
80 if (ybits.is_inf_or_nan())
81 continue;
82 T x = xbits.get_val();
83 T y = ybits.get_val();
84 if ((x == 0) && (y == 0))
85 continue;
86
87 if (LIBC_NAMESPACE::fputil::abs(x) > LIBC_NAMESPACE::fputil::abs(y))
88 EXPECT_FP_EQ(x, func(x, y));
89 else
90 EXPECT_FP_EQ(y, func(x, y));
91 }
92 }
93};
94
95#define LIST_FMAXIMUM_MAG_NUM_TESTS(T, func) \
96 using LlvmLibcFMaximumMagNumTest = FMaximumMagNumTest<T>; \
97 TEST_F(LlvmLibcFMaximumMagNumTest, NaN) { testNaN(&func); } \
98 TEST_F(LlvmLibcFMaximumMagNumTest, InfArg) { testInfArg(&func); } \
99 TEST_F(LlvmLibcFMaximumMagNumTest, NegInfArg) { testNegInfArg(&func); } \
100 TEST_F(LlvmLibcFMaximumMagNumTest, BothZero) { testBothZero(&func); } \
101 TEST_F(LlvmLibcFMaximumMagNumTest, Range) { testRange(&func); }
102
103#endif // LLVM_LIBC_TEST_SRC_MATH_SMOKE_FMAXIMUMMAG_NUMTEST_H
104

source code of libc/test/src/math/smoke/FMaximumMagNumTest.h