1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
//===-- Utility class to test different flavors of [l|ll]round --*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIBC_TEST_SRC_MATH_SMOKE_ROUNDTOINTEGERTEST_H
#define LLVM_LIBC_TEST_SRC_MATH_SMOKE_ROUNDTOINTEGERTEST_H
#include "src/__support/CPP/algorithm.h"
#include "src/__support/FPUtil/FEnvImpl.h"
#include "src/__support/FPUtil/FPBits.h"
#include "src/__support/libc_errno.h"
#include "test/UnitTest/FEnvSafeTest.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"
#include "hdr/math_macros.h"
static constexpr int ROUNDING_MODES[4] = {FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO,
FE_TONEAREST};
template <typename FloatType, typename IntType, bool TestModes = false>
class RoundToIntegerTestTemplate
: public LIBC_NAMESPACE::testing::FEnvSafeTest {
public:
typedef IntType (*RoundToIntegerFunc)(FloatType);
private:
DECLARE_SPECIAL_CONSTANTS(FloatType)
static constexpr StorageType MAX_SUBNORMAL =
FPBits::max_subnormal().uintval();
static constexpr StorageType MIN_SUBNORMAL =
FPBits::min_subnormal().uintval();
static constexpr IntType INTEGER_MIN = IntType(1)
<< (sizeof(IntType) * 8 - 1);
static constexpr IntType INTEGER_MAX = -(INTEGER_MIN + 1);
void test_one_input(RoundToIntegerFunc func, FloatType input,
IntType expected, bool expectError) {
libc_errno = 0;
LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT);
ASSERT_EQ(func(input), expected);
// TODO: Handle the !expectError case. It used to expect
// 0 for errno and exceptions, but this doesn't hold for
// all math functions using RoundToInteger test:
// https://github.com/llvm/llvm-project/pull/88816
if (expectError) {
ASSERT_FP_EXCEPTION(FE_INVALID);
ASSERT_MATH_ERRNO(EDOM);
}
}
public:
void SetUp() override {
LIBC_NAMESPACE::testing::FEnvSafeTest::SetUp();
if (math_errhandling & MATH_ERREXCEPT) {
// We will disable all exceptions so that the test will not
// crash with SIGFPE. We can still use fetestexcept to check
// if the appropriate flag was raised.
LIBC_NAMESPACE::fputil::disable_except(FE_ALL_EXCEPT);
}
}
void do_infinity_and_na_n_test(RoundToIntegerFunc func) {
test_one_input(func, inf, INTEGER_MAX, true);
test_one_input(func, neg_inf, INTEGER_MIN, true);
// This is currently never enabled, the
// LLVM_LIBC_IMPLEMENTATION_DEFINED_TEST_BEHAVIOR CMake option in
// libc/CMakeLists.txt is not forwarded to C++.
#if LIBC_COPT_IMPLEMENTATION_DEFINED_TEST_BEHAVIOR
// Result is not well-defined, we always returns INTEGER_MAX
test_one_input(func, aNaN, INTEGER_MAX, true);
#endif // LIBC_COPT_IMPLEMENTATION_DEFINED_TEST_BEHAVIOR
}
void testInfinityAndNaN(RoundToIntegerFunc func) {
if (TestModes) {
for (int mode : ROUNDING_MODES) {
LIBC_NAMESPACE::fputil::set_round(mode);
do_infinity_and_na_n_test(func);
}
} else {
do_infinity_and_na_n_test(func);
}
}
void do_round_numbers_test(RoundToIntegerFunc func) {
test_one_input(func, zero, IntType(0), false);
test_one_input(func, neg_zero, IntType(0), false);
test_one_input(func, FloatType(1.0), IntType(1), false);
test_one_input(func, FloatType(-1.0), IntType(-1), false);
test_one_input(func, FloatType(10.0), IntType(10), false);
test_one_input(func, FloatType(-10.0), IntType(-10), false);
test_one_input(func, FloatType(1232.0), IntType(1232), false);
test_one_input(func, FloatType(-1232.0), IntType(-1232), false);
}
void testRoundNumbers(RoundToIntegerFunc func) {
if (TestModes) {
for (int mode : ROUNDING_MODES) {
LIBC_NAMESPACE::fputil::set_round(mode);
do_round_numbers_test(func);
}
} else {
do_round_numbers_test(func);
}
}
void testSubnormalRange(RoundToIntegerFunc func) {
// Arbitrary, trades off completeness with testing time (esp. on failure)
constexpr int COUNT = 1'000;
constexpr StorageType STEP = LIBC_NAMESPACE::cpp::max(
static_cast<StorageType>((MAX_SUBNORMAL - MIN_SUBNORMAL) / COUNT),
StorageType(1));
for (StorageType i = MIN_SUBNORMAL; i <= MAX_SUBNORMAL; i += STEP) {
FloatType x = FPBits(i).get_val();
if (x == FloatType(0.0))
continue;
// All subnormal numbers should round to zero.
if (TestModes) {
if (x > zero) {
LIBC_NAMESPACE::fputil::set_round(FE_UPWARD);
test_one_input(func, x, IntType(1), false);
LIBC_NAMESPACE::fputil::set_round(FE_DOWNWARD);
test_one_input(func, x, IntType(0), false);
LIBC_NAMESPACE::fputil::set_round(FE_TOWARDZERO);
test_one_input(func, x, IntType(0), false);
LIBC_NAMESPACE::fputil::set_round(FE_TONEAREST);
test_one_input(func, x, IntType(0), false);
} else {
LIBC_NAMESPACE::fputil::set_round(FE_UPWARD);
test_one_input(func, x, IntType(0), false);
LIBC_NAMESPACE::fputil::set_round(FE_DOWNWARD);
test_one_input(func, x, IntType(-1), false);
LIBC_NAMESPACE::fputil::set_round(FE_TOWARDZERO);
test_one_input(func, x, IntType(0), false);
LIBC_NAMESPACE::fputil::set_round(FE_TONEAREST);
test_one_input(func, x, IntType(0), false);
}
} else {
test_one_input(func, x, 0L, false);
}
}
}
};
#define LIST_ROUND_TO_INTEGER_TESTS_HELPER(FloatType, IntType, func, \
TestModes) \
using LlvmLibcRoundToIntegerTest = \
RoundToIntegerTestTemplate<FloatType, IntType, TestModes>; \
TEST_F(LlvmLibcRoundToIntegerTest, InfinityAndNaN) { \
testInfinityAndNaN(&func); \
} \
TEST_F(LlvmLibcRoundToIntegerTest, RoundNumbers) { \
testRoundNumbers(&func); \
} \
TEST_F(LlvmLibcRoundToIntegerTest, SubnormalRange) { \
testSubnormalRange(&func); \
}
#define LIST_ROUND_TO_INTEGER_TESTS(FloatType, IntType, func) \
LIST_ROUND_TO_INTEGER_TESTS_HELPER(FloatType, IntType, func, false)
// The GPU target does not support different rounding modes.
#ifdef LIBC_TARGET_ARCH_IS_GPU
#define LIST_ROUND_TO_INTEGER_TESTS_WITH_MODES(FloatType, IntType, func) \
LIST_ROUND_TO_INTEGER_TESTS_HELPER(FloatType, IntType, func, false)
#else
#define LIST_ROUND_TO_INTEGER_TESTS_WITH_MODES(FloatType, IntType, func) \
LIST_ROUND_TO_INTEGER_TESTS_HELPER(FloatType, IntType, func, true)
#endif
#endif // LLVM_LIBC_TEST_SRC_MATH_SMOKE_ROUNDTOINTEGERTEST_H
|
