1//===-- Utility class to test different flavors of float add ----*- 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_ADDTEST_H
10#define LLVM_LIBC_TEST_SRC_MATH_ADDTEST_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#include "utils/MPFRWrapper/MPFRUtils.h"
17
18namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
19
20template <typename OutType, typename InType>
21class AddTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
22
23 struct InConstants {
24 DECLARE_SPECIAL_CONSTANTS(InType)
25 };
26
27 using InFPBits = typename InConstants::FPBits;
28 using InStorageType = typename InConstants::StorageType;
29
30 static constexpr InStorageType IN_MAX_NORMAL_U =
31 InFPBits::max_normal().uintval();
32 static constexpr InStorageType IN_MIN_NORMAL_U =
33 InFPBits::min_normal().uintval();
34 static constexpr InStorageType IN_MAX_SUBNORMAL_U =
35 InFPBits::max_subnormal().uintval();
36 static constexpr InStorageType IN_MIN_SUBNORMAL_U =
37 InFPBits::min_subnormal().uintval();
38
39public:
40 using AddFunc = OutType (*)(InType, InType);
41
42 void test_subnormal_range(AddFunc func) {
43 constexpr int COUNT = 100'001;
44 constexpr InStorageType STEP = LIBC_NAMESPACE::cpp::max(
45 static_cast<InStorageType>((IN_MAX_SUBNORMAL_U - IN_MIN_SUBNORMAL_U) /
46 COUNT),
47 InStorageType(1));
48 for (InStorageType i = IN_MIN_SUBNORMAL_U; i <= IN_MAX_SUBNORMAL_U;
49 i += STEP) {
50 InType x = InFPBits(i).get_val();
51 InType y = InFPBits(static_cast<InStorageType>(IN_MAX_SUBNORMAL_U - i))
52 .get_val();
53 mpfr::BinaryInput<InType> input{x, y};
54 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Add, input, func(x, y),
55 0.5);
56 }
57 }
58
59 void test_normal_range(AddFunc func) {
60 constexpr int COUNT = 100'001;
61 constexpr InStorageType STEP = LIBC_NAMESPACE::cpp::max(
62 static_cast<InStorageType>((IN_MAX_NORMAL_U - IN_MIN_NORMAL_U) / COUNT),
63 InStorageType(1));
64 for (InStorageType i = IN_MIN_NORMAL_U; i <= IN_MAX_NORMAL_U; i += STEP) {
65 InType x = InFPBits(i).get_val();
66 InType y =
67 InFPBits(static_cast<InStorageType>(IN_MAX_NORMAL_U - i)).get_val();
68 mpfr::BinaryInput<InType> input{x, y};
69 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Add, input, func(x, y),
70 0.5);
71 }
72 }
73};
74
75#define LIST_ADD_TESTS(OutType, InType, func) \
76 using LlvmLibcAddTest = AddTest<OutType, InType>; \
77 TEST_F(LlvmLibcAddTest, SubnormalRange) { test_subnormal_range(&func); } \
78 TEST_F(LlvmLibcAddTest, NormalRange) { test_normal_range(&func); }
79
80#define LIST_ADD_SAME_TYPE_TESTS(suffix, OutType, InType, func) \
81 using LlvmLibcAddTest##suffix = AddTest<OutType, InType>; \
82 TEST_F(LlvmLibcAddTest##suffix, SubnormalRange) { \
83 test_subnormal_range(&func); \
84 } \
85 TEST_F(LlvmLibcAddTest##suffix, NormalRange) { test_normal_range(&func); }
86
87#endif // LLVM_LIBC_TEST_SRC_MATH_ADDTEST_H
88

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