1//===-- Unittests for str_to_float ----------------------------------------===//
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#include "src/__support/FPUtil/FPBits.h"
10#include "src/__support/str_to_float.h"
11#include "src/__support/uint128.h"
12#include "src/errno/libc_errno.h"
13
14#include "test/UnitTest/Test.h"
15
16namespace LIBC_NAMESPACE {
17
18template <typename T> struct LlvmLibcStrToFloatTest : public testing::Test {
19 using StorageType = typename fputil::FPBits<T>::StorageType;
20
21 void clinger_fast_path_test(const StorageType inputMantissa,
22 const int32_t inputExp10,
23 const StorageType expectedOutputMantissa,
24 const uint32_t expectedOutputExp2) {
25 StorageType actual_output_mantissa = 0;
26 uint32_t actual_output_exp2 = 0;
27
28 auto result = internal::clinger_fast_path<T>({inputMantissa, inputExp10});
29
30 ASSERT_TRUE(result.has_value());
31
32 actual_output_mantissa = result->mantissa;
33 actual_output_exp2 = result->exponent;
34
35 EXPECT_EQ(actual_output_mantissa, expectedOutputMantissa);
36 EXPECT_EQ(actual_output_exp2, expectedOutputExp2);
37 }
38
39 void clinger_fast_path_fails_test(const StorageType inputMantissa,
40 const int32_t inputExp10) {
41 ASSERT_FALSE(internal::clinger_fast_path<T>({inputMantissa, inputExp10})
42 .has_value());
43 }
44
45 void eisel_lemire_test(const StorageType inputMantissa,
46 const int32_t inputExp10,
47 const StorageType expectedOutputMantissa,
48 const uint32_t expectedOutputExp2) {
49 StorageType actual_output_mantissa = 0;
50 uint32_t actual_output_exp2 = 0;
51
52 auto result = internal::eisel_lemire<T>({inputMantissa, inputExp10});
53
54 ASSERT_TRUE(result.has_value());
55
56 actual_output_mantissa = result->mantissa;
57 actual_output_exp2 = result->exponent;
58
59 EXPECT_EQ(actual_output_mantissa, expectedOutputMantissa);
60 EXPECT_EQ(actual_output_exp2, expectedOutputExp2);
61 }
62
63 void simple_decimal_conversion_test(const char *__restrict numStart,
64 const StorageType expectedOutputMantissa,
65 const uint32_t expectedOutputExp2,
66 const int expectedErrno = 0) {
67 StorageType actual_output_mantissa = 0;
68 uint32_t actual_output_exp2 = 0;
69 LIBC_NAMESPACE::libc_errno = 0;
70
71 auto result = internal::simple_decimal_conversion<T>(numStart);
72
73 actual_output_mantissa = result.num.mantissa;
74 actual_output_exp2 = result.num.exponent;
75
76 EXPECT_EQ(actual_output_mantissa, expectedOutputMantissa);
77 EXPECT_EQ(actual_output_exp2, expectedOutputExp2);
78 EXPECT_EQ(result.error, expectedErrno);
79 }
80};
81
82} // namespace LIBC_NAMESPACE
83

source code of libc/test/src/__support/str_to_fp_test.h