1//===-- Unittests for str_to_float<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/macros/config.h"
10#include "str_to_fp_test.h"
11
12namespace LIBC_NAMESPACE_DECL {
13
14using LlvmLibcStrToFltTest = LlvmLibcStrToFloatTest<float>;
15
16TEST_F(LlvmLibcStrToFltTest, ClingerFastPathFloat32Simple) {
17 clinger_fast_path_test(123, 0, 0xf60000, 133);
18 clinger_fast_path_test(1234567, 1, 0xbc6146, 150);
19 clinger_fast_path_test(12345, -5, 0xfcd35b, 123);
20}
21
22TEST_F(LlvmLibcStrToFltTest, ClingerFastPathFloat32ExtendedExp) {
23 clinger_fast_path_test(1, 15, 0xe35fa9, 176);
24 clinger_fast_path_test(1, 17, 0xb1a2bc, 183);
25 clinger_fast_path_fails_test(10, 17);
26 clinger_fast_path_fails_test(1, 50);
27}
28
29TEST_F(LlvmLibcStrToFltTest, ClingerFastPathFloat32NegativeExp) {
30 clinger_fast_path_test(1, -5, 0xa7c5ac, 110);
31 clinger_fast_path_test(1, -10, 0xdbe6ff, 93);
32 clinger_fast_path_fails_test(1, -15);
33}
34
35// Check the fallback states for the algorithm:
36TEST_F(LlvmLibcStrToFltTest, EiselLemireFallbackStates) {
37 // This number can't be evaluated by Eisel-Lemire since it's exactly 1024 away
38 // from both of its closest floating point approximations
39 // (12345678901234548736 and 12345678901234550784)
40 ASSERT_FALSE(internal::eisel_lemire<float>({20040229, 0}).has_value());
41}
42
43TEST_F(LlvmLibcStrToFltTest, SimpleDecimalConversion32SpecificFailures) {
44 simple_decimal_conversion_test(
45 "1.4012984643248170709237295832899161312802619418765e-45", 0x1, 0,
46 ERANGE);
47 simple_decimal_conversion_test(
48 "7."
49 "006492321624085354618647916449580656401309709382578858785341419448955413"
50 "42930300743319094181060791015625e-46",
51 0x0, 0, ERANGE);
52}
53
54TEST(LlvmLibcStrToFltTest, SimpleDecimalConversionExtraTypes) {
55 uint32_t float_output_mantissa = 0;
56 uint32_t output_exp2 = 0;
57
58 auto float_result =
59 internal::simple_decimal_conversion<float>("123456789012345678900");
60 float_output_mantissa = float_result.num.mantissa;
61 output_exp2 = static_cast<uint32_t>(float_result.num.exponent);
62 EXPECT_EQ(float_output_mantissa, uint32_t(0xd629d4));
63 EXPECT_EQ(output_exp2, uint32_t(193));
64 EXPECT_EQ(float_result.error, 0);
65}
66
67} // namespace LIBC_NAMESPACE_DECL
68

source code of libc/test/src/__support/str_to_float_test.cpp