68 lines · cpp
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-exception6//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 away38 // from both of its closest floating point approximations39 // (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_DECL68