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

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