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/FPUtil/BasicOperations.h"
13#include "src/__support/FPUtil/FPBits.h"
14#include "test/UnitTest/FEnvSafeTest.h"
15#include "test/UnitTest/FPMatcher.h"
16#include "test/UnitTest/Test.h"
17
18template <typename T>
19class FMaximumMagNumTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
20
21 DECLARE_SPECIAL_CONSTANTS(T)
22
23public:
24 typedef T (*FMaximumMagNumFunc)(T, T);
25
26 void testNaN(FMaximumMagNumFunc func) {
27 EXPECT_FP_EQ(inf, func(aNaN, inf));
28 EXPECT_FP_EQ_WITH_EXCEPTION(inf, func(sNaN, inf), FE_INVALID);
29 EXPECT_FP_EQ(neg_inf, func(neg_inf, aNaN));
30 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, func(neg_inf, sNaN), FE_INVALID);
31 EXPECT_EQ(FPBits(aNaN).uintval(), FPBits(func(aNaN, aNaN)).uintval());
32 EXPECT_FP_EQ(0.0, func(aNaN, 0.0));
33 EXPECT_FP_EQ(-0.0, func(-0.0, aNaN));
34 EXPECT_FP_EQ_WITH_EXCEPTION(0.0, func(sNaN, 0.0), FE_INVALID);
35 EXPECT_FP_EQ_WITH_EXCEPTION(-0.0, func(-0.0, sNaN), FE_INVALID);
36 EXPECT_FP_EQ(T(-1.2345), func(aNaN, T(-1.2345)));
37 EXPECT_FP_EQ(T(1.2345), func(T(1.2345), aNaN));
38 EXPECT_FP_EQ_WITH_EXCEPTION(T(-1.2345), func(sNaN, T(-1.2345)), FE_INVALID);
39 EXPECT_FP_EQ_WITH_EXCEPTION(T(1.2345), func(T(1.2345), sNaN), FE_INVALID);
40 EXPECT_FP_IS_NAN_WITH_EXCEPTION(func(aNaN, sNaN), FE_INVALID);
41 EXPECT_FP_IS_NAN_WITH_EXCEPTION(func(sNaN, aNaN), FE_INVALID);
42 EXPECT_EQ(FPBits(aNaN).uintval(), FPBits(func(aNaN, sNaN)).uintval());
43 EXPECT_EQ(FPBits(aNaN).uintval(), FPBits(func(sNaN, aNaN)).uintval());
44 EXPECT_EQ(FPBits(aNaN).uintval(), FPBits(func(sNaN, sNaN)).uintval());
45 }
46
47 void testInfArg(FMaximumMagNumFunc func) {
48 EXPECT_FP_EQ(inf, func(neg_inf, inf));
49 EXPECT_FP_EQ(inf, func(inf, 0.0));
50 EXPECT_FP_EQ(inf, func(-0.0, inf));
51 EXPECT_FP_EQ(inf, func(inf, T(1.2345)));
52 EXPECT_FP_EQ(inf, func(T(-1.2345), inf));
53 }
54
55 void testNegInfArg(FMaximumMagNumFunc func) {
56 EXPECT_FP_EQ(inf, func(inf, neg_inf));
57 EXPECT_FP_EQ(neg_inf, func(neg_inf, 0.0));
58 EXPECT_FP_EQ(neg_inf, func(-0.0, neg_inf));
59 EXPECT_FP_EQ(neg_inf, func(neg_inf, T(-1.2345)));
60 EXPECT_FP_EQ(neg_inf, func(T(1.2345), neg_inf));
61 }
62
63 void testBothZero(FMaximumMagNumFunc func) {
64 EXPECT_FP_EQ(0.0, func(0.0, 0.0));
65 EXPECT_FP_EQ(0.0, func(-0.0, 0.0));
66 EXPECT_FP_EQ(0.0, func(0.0, -0.0));
67 EXPECT_FP_EQ(-0.0, func(-0.0, -0.0));
68 }
69
70 void testRange(FMaximumMagNumFunc func) {
71 constexpr StorageType COUNT = 100'001;
72 constexpr StorageType STEP = STORAGE_MAX / COUNT;
73 for (StorageType i = 0, v = 0, w = STORAGE_MAX; i <= COUNT;
74 ++i, v += STEP, w -= STEP) {
75 FPBits xbits(v), ybits(w);
76 if (xbits.is_inf_or_nan())
77 continue;
78 if (ybits.is_inf_or_nan())
79 continue;
80 T x = xbits.get_val();
81 T y = ybits.get_val();
82 if ((x == 0) && (y == 0))
83 continue;
84
85 if (LIBC_NAMESPACE::fputil::abs(x) > LIBC_NAMESPACE::fputil::abs(y)) {
86 EXPECT_FP_EQ(x, func(x, y));
87 } else {
88 EXPECT_FP_EQ(y, func(x, y));
89 }
90 }
91 }
92};
93
94#define LIST_FMAXIMUM_MAG_NUM_TESTS(T, func) \
95 using LlvmLibcFMaximumMagNumTest = FMaximumMagNumTest<T>; \
96 TEST_F(LlvmLibcFMaximumMagNumTest, NaN) { testNaN(&func); } \
97 TEST_F(LlvmLibcFMaximumMagNumTest, InfArg) { testInfArg(&func); } \
98 TEST_F(LlvmLibcFMaximumMagNumTest, NegInfArg) { testNegInfArg(&func); } \
99 TEST_F(LlvmLibcFMaximumMagNumTest, BothZero) { testBothZero(&func); } \
100 TEST_F(LlvmLibcFMaximumMagNumTest, Range) { testRange(&func); }
101
102#endif // LLVM_LIBC_TEST_SRC_MATH_SMOKE_FMAXIMUMMAG_NUMTEST_H
103

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