Revert "Microsoft's floating-point to_chars powered by Ryu and Ryu Printf"
This reverts commit a8025e06fc0f2fe1bbee9e1a6f15c336bfbdcb05 since
it triggers PR52584 with debug info enabled.
NOKEYCHECK=True
GitOrigin-RevId: ae53d02f557cdec5f05a19239f887b06d1a8518d
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ab629c2..c0e87bb 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -19,16 +19,6 @@
include/atomic_support.h
include/config_elast.h
include/refstring.h
- include/ryu/common.h
- include/ryu/d2fixed.h
- include/ryu/d2fixed_full_table.h
- include/ryu/d2s.h
- include/ryu/d2s_full_table.h
- include/ryu/d2s_intrinsics.h
- include/ryu/digit_table.h
- include/ryu/f2s.h
- include/ryu/ryu.h
- include/to_chars_floating_point.h
legacy_pointer_safety.cpp
memory.cpp
mutex.cpp
@@ -36,9 +26,6 @@
new.cpp
optional.cpp
random_shuffle.cpp
- ryu/d2fixed.cpp
- ryu/d2s.cpp
- ryu/f2s.cpp
shared_mutex.cpp
stdexcept.cpp
string.cpp
diff --git a/src/charconv.cpp b/src/charconv.cpp
index 60ec3ec..533e59b 100644
--- a/src/charconv.cpp
+++ b/src/charconv.cpp
@@ -9,14 +9,27 @@
#include "charconv"
#include <string.h>
-#include "include/ryu/digit_table.h"
-#include "include/to_chars_floating_point.h"
-
_LIBCPP_BEGIN_NAMESPACE_STD
namespace __itoa
{
+static constexpr char cDigitsLut[200] = {
+ '0', '0', '0', '1', '0', '2', '0', '3', '0', '4', '0', '5', '0', '6', '0',
+ '7', '0', '8', '0', '9', '1', '0', '1', '1', '1', '2', '1', '3', '1', '4',
+ '1', '5', '1', '6', '1', '7', '1', '8', '1', '9', '2', '0', '2', '1', '2',
+ '2', '2', '3', '2', '4', '2', '5', '2', '6', '2', '7', '2', '8', '2', '9',
+ '3', '0', '3', '1', '3', '2', '3', '3', '3', '4', '3', '5', '3', '6', '3',
+ '7', '3', '8', '3', '9', '4', '0', '4', '1', '4', '2', '4', '3', '4', '4',
+ '4', '5', '4', '6', '4', '7', '4', '8', '4', '9', '5', '0', '5', '1', '5',
+ '2', '5', '3', '5', '4', '5', '5', '5', '6', '5', '7', '5', '8', '5', '9',
+ '6', '0', '6', '1', '6', '2', '6', '3', '6', '4', '6', '5', '6', '6', '6',
+ '7', '6', '8', '6', '9', '7', '0', '7', '1', '7', '2', '7', '3', '7', '4',
+ '7', '5', '7', '6', '7', '7', '7', '8', '7', '9', '8', '0', '8', '1', '8',
+ '2', '8', '3', '8', '4', '8', '5', '8', '6', '8', '7', '8', '8', '8', '9',
+ '9', '0', '9', '1', '9', '2', '9', '3', '9', '4', '9', '5', '9', '6', '9',
+ '7', '9', '8', '9', '9'};
+
template <typename T>
inline _LIBCPP_INLINE_VISIBILITY char*
append1(char* buffer, T i) noexcept
@@ -29,7 +42,7 @@
inline _LIBCPP_INLINE_VISIBILITY char*
append2(char* buffer, T i) noexcept
{
- memcpy(buffer, &__DIGIT_TABLE[(i)*2], 2);
+ memcpy(buffer, &cDigitsLut[(i)*2], 2);
return buffer + 2;
}
@@ -144,53 +157,4 @@
} // namespace __itoa
-// The original version of floating-point to_chars was written by Microsoft and
-// contributed with the following license.
-
-// Copyright (c) Microsoft Corporation.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-// This implementation is dedicated to the memory of Mary and Thavatchai.
-
-to_chars_result to_chars(char* __first, char* __last, float __value) {
- return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(__first, __last, __value, chars_format{}, 0);
-}
-
-to_chars_result to_chars(char* __first, char* __last, double __value) {
- return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(__first, __last, __value, chars_format{}, 0);
-}
-
-to_chars_result to_chars(char* __first, char* __last, long double __value) {
- return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(__first, __last, static_cast<double>(__value),
- chars_format{}, 0);
-}
-
-to_chars_result to_chars(char* __first, char* __last, float __value, chars_format __fmt) {
- return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(__first, __last, __value, __fmt, 0);
-}
-
-to_chars_result to_chars(char* __first, char* __last, double __value, chars_format __fmt) {
- return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(__first, __last, __value, __fmt, 0);
-}
-
-to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt) {
- return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(__first, __last, static_cast<double>(__value),
- __fmt, 0);
-}
-
-to_chars_result to_chars(char* __first, char* __last, float __value, chars_format __fmt, int __precision) {
- return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>(__first, __last, __value, __fmt,
- __precision);
-}
-
-to_chars_result to_chars(char* __first, char* __last, double __value, chars_format __fmt, int __precision) {
- return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>(__first, __last, __value, __fmt,
- __precision);
-}
-
-to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt, int __precision) {
- return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>(
- __first, __last, static_cast<double>(__value), __fmt, __precision);
-}
-
_LIBCPP_END_NAMESPACE_STD
diff --git a/src/include/ryu/common.h b/src/include/ryu/common.h
deleted file mode 100644
index 5291312..0000000
--- a/src/include/ryu/common.h
+++ /dev/null
@@ -1,107 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Copyright (c) Microsoft Corporation.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-// Copyright 2018 Ulf Adams
-// Copyright (c) Microsoft Corporation. All rights reserved.
-
-// Boost Software License - Version 1.0 - August 17th, 2003
-
-// Permission is hereby granted, free of charge, to any person or organization
-// obtaining a copy of the software and accompanying documentation covered by
-// this license (the "Software") to use, reproduce, display, distribute,
-// execute, and transmit the Software, and to prepare derivative works of the
-// Software, and to permit third-parties to whom the Software is furnished to
-// do so, all subject to the following:
-
-// The copyright notices in the Software and this entire statement, including
-// the above license grant, this restriction and the following disclaimer,
-// must be included in all copies of the Software, in whole or in part, and
-// all derivative works of the Software, unless such copies or derivative
-// works are solely in the form of machine-executable object code generated by
-// a source language processor.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-#ifndef _LIBCPP_SRC_INCLUDE_RYU_COMMON_H
-#define _LIBCPP_SRC_INCLUDE_RYU_COMMON_H
-
-// Avoid formatting to keep the changes with the original code minimal.
-// clang-format off
-
-#include "__config"
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __decimalLength9(const uint32_t __v) {
- // Function precondition: __v is not a 10-digit number.
- // (f2s: 9 digits are sufficient for round-tripping.)
- // (d2fixed: We print 9-digit blocks.)
- _LIBCPP_ASSERT(__v < 1000000000, "");
- if (__v >= 100000000) { return 9; }
- if (__v >= 10000000) { return 8; }
- if (__v >= 1000000) { return 7; }
- if (__v >= 100000) { return 6; }
- if (__v >= 10000) { return 5; }
- if (__v >= 1000) { return 4; }
- if (__v >= 100) { return 3; }
- if (__v >= 10) { return 2; }
- return 1;
-}
-
-// Returns __e == 0 ? 1 : ceil(log_2(5^__e)).
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline int32_t __pow5bits(const int32_t __e) {
- // This approximation works up to the point that the multiplication overflows at __e = 3529.
- // If the multiplication were done in 64 bits, it would fail at 5^4004 which is just greater
- // than 2^9297.
- _LIBCPP_ASSERT(__e >= 0, "");
- _LIBCPP_ASSERT(__e <= 3528, "");
- return static_cast<int32_t>(((static_cast<uint32_t>(__e) * 1217359) >> 19) + 1);
-}
-
-// Returns floor(log_10(2^__e)).
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __log10Pow2(const int32_t __e) {
- // The first value this approximation fails for is 2^1651 which is just greater than 10^297.
- _LIBCPP_ASSERT(__e >= 0, "");
- _LIBCPP_ASSERT(__e <= 1650, "");
- return (static_cast<uint32_t>(__e) * 78913) >> 18;
-}
-
-// Returns floor(log_10(5^__e)).
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __log10Pow5(const int32_t __e) {
- // The first value this approximation fails for is 5^2621 which is just greater than 10^1832.
- _LIBCPP_ASSERT(__e >= 0, "");
- _LIBCPP_ASSERT(__e <= 2620, "");
- return (static_cast<uint32_t>(__e) * 732923) >> 20;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __float_to_bits(const float __f) {
- uint32_t __bits = 0;
- _VSTD::memcpy(&__bits, &__f, sizeof(float));
- return __bits;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __double_to_bits(const double __d) {
- uint64_t __bits = 0;
- _VSTD::memcpy(&__bits, &__d, sizeof(double));
- return __bits;
-}
-
-_LIBCPP_END_NAMESPACE_STD
-
-// clang-format on
-
-#endif // _LIBCPP_SRC_INCLUDE_RYU_COMMON_H
diff --git a/src/include/ryu/d2fixed.h b/src/include/ryu/d2fixed.h
deleted file mode 100644
index e495c11..0000000
--- a/src/include/ryu/d2fixed.h
+++ /dev/null
@@ -1,60 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Copyright (c) Microsoft Corporation.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-// Copyright 2018 Ulf Adams
-// Copyright (c) Microsoft Corporation. All rights reserved.
-
-// Boost Software License - Version 1.0 - August 17th, 2003
-
-// Permission is hereby granted, free of charge, to any person or organization
-// obtaining a copy of the software and accompanying documentation covered by
-// this license (the "Software") to use, reproduce, display, distribute,
-// execute, and transmit the Software, and to prepare derivative works of the
-// Software, and to permit third-parties to whom the Software is furnished to
-// do so, all subject to the following:
-
-// The copyright notices in the Software and this entire statement, including
-// the above license grant, this restriction and the following disclaimer,
-// must be included in all copies of the Software, in whole or in part, and
-// all derivative works of the Software, unless such copies or derivative
-// works are solely in the form of machine-executable object code generated by
-// a source language processor.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-#ifndef _LIBCPP_SRC_INCLUDE_RYU_D2FIXED_H
-#define _LIBCPP_SRC_INCLUDE_RYU_D2FIXED_H
-
-// Avoid formatting to keep the changes with the original code minimal.
-// clang-format off
-
-#include "__config"
-#include "cstdint"
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-void __append_n_digits(const uint32_t __olength, uint32_t __digits, char* const __result);
-void __append_nine_digits(uint32_t __digits, char* const __result);
-
-[[nodiscard]] to_chars_result __d2fixed_buffered_n(char* _First, char* const _Last, const double __d, const uint32_t __precision);
-[[nodiscard]] to_chars_result __d2exp_buffered_n(char* _First, char* const _Last, const double __d, uint32_t __precision);
-
-_LIBCPP_END_NAMESPACE_STD
-
-// clang-format on
-
-#endif // _LIBCPP_SRC_INCLUDE_RYU_D2FIXED_H
diff --git a/src/include/ryu/d2fixed_full_table.h b/src/include/ryu/d2fixed_full_table.h
deleted file mode 100644
index 7181cd8..0000000
--- a/src/include/ryu/d2fixed_full_table.h
+++ /dev/null
@@ -1,4451 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Copyright (c) Microsoft Corporation.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-// Copyright 2018 Ulf Adams
-// Copyright (c) Microsoft Corporation. All rights reserved.
-
-// Boost Software License - Version 1.0 - August 17th, 2003
-
-// Permission is hereby granted, free of charge, to any person or organization
-// obtaining a copy of the software and accompanying documentation covered by
-// this license (the "Software") to use, reproduce, display, distribute,
-// execute, and transmit the Software, and to prepare derivative works of the
-// Software, and to permit third-parties to whom the Software is furnished to
-// do so, all subject to the following:
-
-// The copyright notices in the Software and this entire statement, including
-// the above license grant, this restriction and the following disclaimer,
-// must be included in all copies of the Software, in whole or in part, and
-// all derivative works of the Software, unless such copies or derivative
-// works are solely in the form of machine-executable object code generated by
-// a source language processor.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-#ifndef _LIBCPP_SRC_INCLUDE_RYU_D2FIXED_FULL_TABLE_H
-#define _LIBCPP_SRC_INCLUDE_RYU_D2FIXED_FULL_TABLE_H
-
-// Avoid formatting to keep the changes with the original code minimal.
-// clang-format off
-
-#include "__config"
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-inline constexpr int __TABLE_SIZE = 64;
-
-inline constexpr uint16_t __POW10_OFFSET[__TABLE_SIZE] = {
- 0, 2, 5, 8, 12, 16, 21, 26, 32, 39,
- 46, 54, 62, 71, 80, 90, 100, 111, 122, 134,
- 146, 159, 173, 187, 202, 217, 233, 249, 266, 283,
- 301, 319, 338, 357, 377, 397, 418, 440, 462, 485,
- 508, 532, 556, 581, 606, 632, 658, 685, 712, 740,
- 769, 798, 828, 858, 889, 920, 952, 984, 1017, 1050,
- 1084, 1118, 1153, 1188
-};
-
-inline constexpr uint64_t __POW10_SPLIT[1224][3] = {
- { 1u, 72057594037927936u, 0u },
- { 699646928636035157u, 72057594u, 0u },
- { 1u, 0u, 256u },
- { 11902091922964236229u, 4722366482869u, 0u },
- { 6760415703743915872u, 4722u, 0u },
- { 1u, 0u, 16777216u },
- { 13369850649504950658u, 309485009821345068u, 0u },
- { 15151142278969419334u, 309485009u, 0u },
- { 1u, 0u, 75511627776u },
- { 4635408826454083567u, 9437866644873197963u, 1099u },
- { 12367138975830625353u, 20282409603651u, 0u },
- { 7555853734021184432u, 20282u, 0u },
- { 1u, 0u, 250037927936u },
- { 5171444645924616995u, 699646928636035156u, 72057594u },
- { 16672297533003297786u, 1329227995784915872u, 0u },
- { 14479142226848862515u, 1329227995u, 0u },
- { 1u, 0u, 181645213696u },
- { 12214193123817091081u, 11902091922964236228u, 114366482869u },
- { 16592893013671929435u, 6760415703743915871u, 4722u },
- { 4549827147718617003u, 87112285931760u, 0u },
- { 5274510003815168971u, 87112u, 0u },
- { 1u, 0u, 44724781056u },
- { 9794971998307800535u, 13369850649504950657u, 209821345068u },
- { 14720142899209240169u, 15151142278969419333u, 309485009u },
- { 4300745446091561535u, 5708990770823839524u, 0u },
- { 15197156861335443364u, 5708990770u, 0u },
- { 1u, 0u, 139251286016u },
- { 13484604155038683037u, 4635408826454083566u, 67670423947u },
- { 8356963862052375699u, 12367138975830625352u, 58409603651u },
- { 5850852848337610021u, 7555853734021184431u, 20282u },
- { 2712780827214982050u, 374144419156711u, 0u },
- { 7732076577307618052u, 374144u, 0u },
- { 1u, 0u, 84280344576u },
- { 17296309485351745867u, 5171444645924616994u, 160903807060u },
- { 16598859101615853088u, 16672297533003297785u, 219784915872u },
- { 7469952526870444257u, 14479142226848862514u, 1329227995u },
- { 13531654022114669524u, 6073184580144670117u, 1u },
- { 15757609704383306943u, 24519928653u, 0u },
- { 9590990814237149590u, 24u, 0u },
- { 1u, 0u, 196662132736u },
- { 15408590707489433890u, 12214193123817091080u, 95899502532u },
- { 18332056844289122710u, 16592893013671929434u, 240246646623u },
- { 11114572877353986193u, 4549827147718617002u, 72285931760u },
- { 1703393793997526525u, 5274510003815168970u, 87112u },
- { 5082852056285196265u, 1606938044258990u, 0u },
- { 816434266573722365u, 1606938u, 0u },
- { 1u, 0u, 129530986496u },
- { 5736523019264798742u, 9794971998307800534u, 69797980545u },
- { 10129314776268243339u, 14720142899209240168u, 36233143877u },
- { 16511595775483995364u, 4300745446091561534u, 50823839524u },
- { 12367293405401453325u, 15197156861335443363u, 5708990770u },
- { 16934621733248854291u, 13078571300009428617u, 5u },
- { 10278280417769171336u, 105312291668u, 0u },
- { 5760764486226151240u, 105u, 0u },
- { 1u, 0u, 238731001856u },
- { 4128368337188369761u, 13484604155038683036u, 72453031918u },
- { 10240941003671005056u, 8356963862052375698u, 175317175368u },
- { 17933378316822368251u, 5850852848337610020u, 231147060143u },
- { 8346249813075698616u, 2712780827214982049u, 128419156711u },
- { 15906203609160902695u, 7732076577307618051u, 374144u },
- { 14525607416135386328u, 6901746346790563u, 0u },
- { 6397156777364256320u, 6901746u, 0u },
- { 1u, 0u, 34937634816u },
- { 16798760952716600048u, 17296309485351745866u, 249899825954u },
- { 2419982808370854967u, 16598859101615853087u, 50404946937u },
- { 2922947087773078956u, 7469952526870444256u, 165733552434u },
- { 15419220167069510190u, 13531654022114669523u, 77854221733u },
- { 3452124642157173416u, 15757609704383306942u, 24519928653u },
- { 5979700067267186899u, 9590990814237149589u, 24u },
- { 4913998146922579597u, 452312848583u, 0u },
- { 5771037749337678924u, 452u, 0u },
- { 1u, 0u, 8835301376u },
- { 3464734175350698519u, 15408590707489433889u, 90993782792u },
- { 9334527711335850125u, 18332056844289122709u, 170602522202u },
- { 7269882896518450106u, 11114572877353986192u, 202092341162u },
- { 1372511258182263196u, 1703393793997526524u, 174275541962u },
- { 7571228438575951046u, 5082852056285196264u, 26044258990u },
- { 2992506536646070406u, 816434266573722364u, 1606938u },
- { 524517896824344606u, 29642774844752946u, 0u },
- { 15582941400898702773u, 29642774u, 0u },
- { 1u, 0u, 214310977536u },
- { 3846112492507251066u, 5736523019264798741u, 104549111254u },
- { 16681117750123089487u, 10129314776268243338u, 62895095400u },
- { 14986314536556547267u, 16511595775483995363u, 163670432318u },
- { 2573712825027107389u, 12367293405401453324u, 137918027683u },
- { 7504855874008324928u, 16934621733248854290u, 84557186697u },
- { 9572138030626879787u, 10278280417769171335u, 105312291668u },
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- { 360256418697768294u, 15951418930590301118u, 37389952614u },
- { 321440824631118565u, 7193356087283467260u, 136953715493u },
- { 10069228080701402580u, 17592945625696089445u, 243192687752u },
- { 9428069607611622975u, 3554461664875361427u, 46120009203u },
- { 14736799017468812344u, 2213779057785318207u, 153210386222u },
- { 10875332567307979280u, 3880940796082421147u, 149245476249u },
- { 4611492910339012807u, 4528237545358141042u, 108633238933u },
- { 10743508637597314786u, 11681196539088147362u, 140533156716u },
- { 9356196315668016028u, 9835005502912643016u, 128269103756u },
- { 15755598617722189347u, 4964088126040986695u, 206181905536u },
- { 1275276394173375542u, 3355564873147047621u, 30100456398u },
- { 12644999363867216251u, 1853093467828272926u, 105799888670u },
- { 4553830511509832021u, 14755341584803008676u, 103254872681u },
- { 8869400642218174412u, 4701571132542556620u, 87332245607u },
- { 16570849151159054040u, 6128849686644853850u, 68651977815u },
- { 16127119334101797673u, 12026867901170202093u, 86970890052u },
- { 9686867250420930550u, 17909760324981426302u, 230157084246u },
- { 10678226869774428035u, 2897692901883393663u, 163499238u },
- { 7767227962910162068u, 3016028602530220424u, 0u },
- { 9780840471948993674u, 3016028602u, 0u },
- { 1u, 0u, 213668069376u },
- { 6288709332106746357u, 12323704802554838153u, 16386837205u },
- { 9066785620141948673u, 7135886931147821731u, 141831652624u },
- { 8442375916704414909u, 15341283120292884946u, 14167660429u },
- { 11604629218100425803u, 3092789040392634165u, 188477686542u },
- { 3877248044010875762u, 8811761390822097864u, 134914571196u },
- { 16435137704395217283u, 16870860798610218168u, 103946077062u },
- { 14994442577577813271u, 17452041453591904832u, 111559165543u },
- { 4410105917142436089u, 10314783684009874907u, 245267398767u },
- { 4632574728444936970u, 4932636630789274902u, 202983581941u },
- { 9117147535650050359u, 18143884346082124479u, 134153046474u },
- { 588939301256904809u, 2823209155405527321u, 69877954182u },
- { 324393982565305683u, 16195396106620226250u, 173062371141u },
- { 9380909186923521175u, 1150544491807648943u, 73421074605u },
- { 4463385697777230217u, 7767455475523884823u, 94824230985u },
- { 16378985502426333808u, 15204378045683991807u, 211934567774u },
- { 18210894922387834354u, 17239732561718805621u, 38698574803u },
- { 1555748035329493205u, 12886430624522800061u, 83984577574u },
- { 4277055533891898507u, 18162250541178258135u, 184923140435u },
- { 11574429772510874408u, 17028935366700158083u, 219871452856u },
- { 17391099253493808815u, 16075467823964198636u, 215531468251u },
- { 5791212393959129882u, 9803858825574498303u, 27946729175u },
- { 11254268231455680880u, 17464070808143041816u, 124958581275u },
- { 16355477587312235322u, 17682703471239266775u, 227983788156u },
- { 2411485149249320633u, 18147688354161351335u, 145361224931u },
- { 12763114642070638360u, 6663423873348080050u, 183510511249u },
- { 1147543073987366419u, 9417270363716235132u, 197503883703u },
- { 8410777835225272692u, 9295013721571344178u, 63336074437u },
- { 8134725822306818018u, 6199479138350037782u, 14048117055u },
- { 8899607004752328377u, 887603005365085687u, 232018105614u },
- { 690976506652396830u, 333989628642975695u, 140250490600u },
- { 12281570945595192074u, 4620735991403939438u, 54673209484u },
- { 12592957291365552899u, 12418523063962801200u, 219086071862u },
- { 13595807339013970272u, 1587745622680169418u, 10715u },
- { 9698096389749839992u, 197658450495420u, 0u },
- { 8310173728816391804u, 197658u, 0u },
-};
-
-inline constexpr int __TABLE_SIZE_2 = 69;
-inline constexpr int __ADDITIONAL_BITS_2 = 120;
-
-inline constexpr uint16_t __POW10_OFFSET_2[__TABLE_SIZE_2] = {
- 0, 2, 6, 12, 20, 29, 40, 52, 66, 80,
- 95, 112, 130, 150, 170, 192, 215, 240, 265, 292,
- 320, 350, 381, 413, 446, 480, 516, 552, 590, 629,
- 670, 712, 755, 799, 845, 892, 940, 989, 1040, 1092,
- 1145, 1199, 1254, 1311, 1369, 1428, 1488, 1550, 1613, 1678,
- 1743, 1810, 1878, 1947, 2017, 2088, 2161, 2235, 2311, 2387,
- 2465, 2544, 2625, 2706, 2789, 2873, 2959, 3046, 3133
-};
-
-inline constexpr uint8_t __MIN_BLOCK_2[__TABLE_SIZE_2] = {
- 0, 0, 0, 0, 0, 0, 1, 1, 2, 3,
- 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
- 8, 9, 9, 10, 11, 11, 12, 12, 13, 13,
- 14, 14, 15, 15, 16, 16, 17, 17, 18, 19,
- 19, 20, 20, 21, 21, 22, 22, 23, 23, 24,
- 24, 25, 26, 26, 27, 27, 28, 28, 29, 29,
- 30, 30, 31, 31, 32, 32, 33, 34, 0
-};
-
-inline constexpr uint64_t __POW10_SPLIT_2[3133][3] = {
- { 0u, 0u, 3906250u },
- { 0u, 0u, 202000000000u },
- { 0u, 11153727427136454656u, 59u },
- { 0u, 7205759403792793600u, 59604644775u },
- { 0u, 0u, 167390625000u },
- { 0u, 0u, 232000000000u },
- { 0u, 16777216000000000u, 0u },
- { 0u, 12945425605062557696u, 909494u },
- { 0u, 4388757836872548352u, 182701772928u },
- { 0u, 1152921504606846976u, 128237915039u },
- { 0u, 0u, 159062500000u },
- { 0u, 0u, 160000000000u },
- { 0u, 256000000000u, 0u },
- { 0u, 16192327041775828992u, 13u },
- { 0u, 15024075324038053888u, 13877787807u },
- { 0u, 5449091666327633920u, 159814456755u },
- { 0u, 2494994193563254784u, 179295395851u },
- { 0u, 4611686018427387904u, 11135253906u },
- { 0u, 0u, 146250000000u },
- { 0u, 0u, 128000000000u },
- { 0u, 3906250u, 0u },
- { 0u, 3906250000000000u, 0u },
- { 0u, 4368439412768899072u, 211758u },
- { 0u, 1563676642168012800u, 46236813575u },
- { 0u, 11532349341402398720u, 7084767080u },
- { 0u, 9048364970084925440u, 104625169910u },
- { 0u, 16609275425742389248u, 246490512847u },
- { 0u, 0u, 207900390625u },
- { 0u, 0u, 225000000000u },
- { 11153727427136454656u, 59u, 0u },
- { 7205759403792793600u, 59604644775u, 0u },
- { 0u, 4264412554261970152u, 3u },
- { 0u, 14485570586272534528u, 3231174267u },
- { 0u, 17827675094632103936u, 123785264354u },
- { 0u, 7347197909193981952u, 226966440203u },
- { 0u, 13677404030777688064u, 11398292396u },
- { 0u, 3810326759732150272u, 172741453558u },
- { 0u, 9943947977234055168u, 246206558227u },
- { 0u, 0u, 19539062500u },
- { 0u, 0u, 228000000000u },
- { 12945425605062557696u, 909494u, 0u },
- { 4388757836872548352u, 909494701772928u, 0u },
- { 1152921504606846976u, 14878706826214591391u, 49303u },
- { 0u, 4387341015746028192u, 151806576313u },
- { 0u, 651726680428265472u, 185237838233u },
- { 0u, 2570638187944738816u, 153035330174u },
- { 0u, 7419175577111756800u, 126139354575u },
- { 0u, 17299322326264840192u, 207402194313u },
- { 0u, 7990511638862102528u, 137937798142u },
- { 0u, 16717361816799281152u, 254433166503u },
- { 0u, 0u, 167906250000u },
- { 0u, 0u, 16000000000u },
- { 16192327041775828992u, 13u, 0u },
- { 15024075324038053888u, 13877787807u, 0u },
- { 5449091666327633920u, 13877787807814456755u, 0u },
- { 2494994193563254784u, 9707857417284919307u, 752316384u },
- { 4611686018427387904u, 1844515466944871826u, 224526264005u },
- { 0u, 15167599819856275072u, 197099991383u },
- { 0u, 14830185305589481472u, 87822237233u },
- { 0u, 6163721531743535104u, 49803945956u },
- { 0u, 14122847407012052992u, 228334136013u },
- { 0u, 335491783960035328u, 205765601092u },
- { 0u, 941252322120433664u, 68018187046u },
- { 0u, 11529215046068469760u, 38051025390u },
- { 0u, 0u, 238625000000u },
- { 0u, 0u, 64000000000u },
- { 4368439412768899072u, 211758u, 0u },
- { 1563676642168012800u, 211758236813575u, 0u },
- { 11532349341402398720u, 8061591463141767016u, 11479u },
- { 9048364970084925440u, 16628725344207857142u, 215437019748u },
- { 16609275425742389248u, 3555541870038531535u, 100901445007u },
- { 0u, 18316647450161853665u, 143192746310u },
- { 0u, 16709574568378075648u, 70992947447u },
- { 0u, 7696022835795591168u, 247905827852u },
- { 0u, 16664449640376041472u, 12417202233u },
- { 0u, 3109186955116544000u, 57903381625u },
- { 0u, 10515518101817131008u, 121168549362u },
- { 0u, 9961962375743537152u, 242570047378u },
- { 0u, 9223372036854775808u, 146540039062u },
- { 0u, 0u, 150500000000u },
- { 14485570586272534528u, 3231174267u, 0u },
- { 17827675094632103936u, 3231174267785264354u, 0u },
- { 7347197909193981952u, 748977172262750475u, 175162308u },
- { 13677404030777688064u, 15965033457315095468u, 196040602133u },
- { 3810326759732150272u, 16809402149066729206u, 21865466197u },
- { 9943947977234055168u, 7563769067065700371u, 85911239516u },
- { 0u, 13550322810840051428u, 92410032742u },
- { 0u, 8663209637545764864u, 102734564471u },
- { 0u, 8969247575312957440u, 119469633535u },
- { 0u, 6193172891660451840u, 255486223885u },
- { 0u, 3427954273864908800u, 13335732575u },
- { 0u, 10058367555266936832u, 95185829773u },
- { 0u, 13907115649320091648u, 141545265197u },
- { 0u, 0u, 45753906250u },
- { 0u, 0u, 74000000000u },
- { 14878706826214591391u, 49303u, 0u },
- { 4387341015746028192u, 49303806576313u, 0u },
- { 651726680428265472u, 14106411361315920281u, 2672u },
- { 2570638187944738816u, 3609034283485221502u, 112764710092u },
- { 7419175577111756800u, 9896072247338192335u, 204195646140u },
- { 17299322326264840192u, 8889095178479228297u, 188536467151u },
- { 7990511638862102528u, 3631796911038383102u, 207481878815u },
- { 16717361816799281152u, 898318840772166823u, 31196880105u },
- { 0u, 17293677953982795024u, 233048697961u },
- { 0u, 7353628266884669440u, 105937492160u },
- { 0u, 2404693032470315008u, 192398640987u },
- { 0u, 9191155893041889280u, 91130358670u },
- { 0u, 6353946855033798656u, 142498253559u },
- { 0u, 3767824038248841216u, 247344448149u },
- { 0u, 7205759403792793600u, 149204254150u },
- { 0u, 0u, 198390625000u },
- { 0u, 0u, 232000000000u },
- { 9707857417284919307u, 752316384u, 0u },
- { 1844515466944871826u, 752316384526264005u, 0u },
- { 15167599819856275072u, 17063068157692817751u, 40783152u },
- { 14830185305589481472u, 5385330256507239985u, 48924990778u },
- { 6163721531743535104u, 3373050282752075748u, 58291939338u },
- { 14122847407012052992u, 4116064001262906061u, 10182853422u },
- { 335491783960035328u, 11306582046748043076u, 46223132276u },
- { 941252322120433664u, 17035410946089626406u, 116612931040u },
- { 11529215046068469760u, 15618595715183448558u, 224923491477u },
- { 0u, 5141740092277295680u, 149846685770u },
- { 0u, 16973644291514990592u, 74278734288u },
- { 0u, 14625255268443750400u, 208920143100u },
- { 0u, 14021170507320131584u, 252792836676u },
- { 0u, 4451355232865091584u, 68760089176u },
- { 0u, 12891553933348044800u, 88241308450u },
- { 0u, 1152921504606846976u, 34698852539u },
- { 0u, 0u, 187062500000u },
- { 0u, 0u, 160000000000u },
- { 8061591463141767016u, 11479u, 0u },
- { 16628725344207857142u, 11479437019748u, 0u },
- { 3555541870038531535u, 5562205901560339855u, 622u },
- { 18316647450161853665u, 2106077949367544134u, 110301527786u },
- { 16709574568378075648u, 7496855998374373623u, 234114170714u },
- { 7696022835795591168u, 229183437194837004u, 90406405378u },
- { 16664449640376041472u, 465169186276472889u, 2012424059u },
- { 3109186955116544000u, 2152980561625316473u, 123025216872u },
- { 10515518101817131008u, 2059790725449340402u, 104116713310u },
- { 9961962375743537152u, 17891190926410198930u, 94111661478u },
- { 9223372036854775808u, 9930696175609809814u, 166969883403u },
- { 0u, 7276914261609005312u, 11538344118u },
- { 0u, 10539762974036983808u, 182394482312u },
- { 0u, 12851089458992250880u, 136571361695u },
- { 0u, 9449311677678878720u, 159696658955u },
- { 0u, 8699564697382289408u, 11512248212u },
- { 0u, 4224376450473525248u, 148471604347u },
- { 0u, 4611686018427387904u, 123229003906u },
- { 0u, 0u, 130250000000u },
- { 0u, 0u, 128000000000u },
- { 748977172262750475u, 175162308u, 0u },
- { 15965033457315095468u, 175162308040602133u, 0u },
- { 16809402149066729206u, 13756840147955779925u, 9495567u },
- { 7563769067065700371u, 13788447602092505948u, 15745759798u },
- { 13550322810840051428u, 4972540435632173670u, 54747473242u },
- { 8663209637545764864u, 2844874687533091959u, 90269561957u },
- { 8969247575312957440u, 15377573779532804095u, 101154220965u },
- { 6193172891660451840u, 17824715805091194381u, 165833619944u },
- { 3427954273864908800u, 18277569135638159711u, 232966279779u },
- { 10058367555266936832u, 4254645803379752845u, 99990829008u },
- { 13907115649320091648u, 2933643244178200621u, 208230644811u },
- { 0u, 17188148801879487562u, 75159033118u },
- { 0u, 11069762501163246592u, 30931771413u },
- { 0u, 11676570643941818368u, 21600093027u },
- { 0u, 17840016768744030208u, 99632988162u },
- { 0u, 16463817321652158464u, 2967109246u },
- { 0u, 6954191143357644800u, 126892505325u },
- { 0u, 5080060379673919488u, 237376987457u },
- { 0u, 0u, 65275390625u },
- { 0u, 0u, 161000000000u },
- { 14106411361315920281u, 2672u, 0u },
- { 3609034283485221502u, 2672764710092u, 0u },
- { 9896072247338192335u, 16433563478020213436u, 144u },
- { 8889095178479228297u, 4194750497955655375u, 144890865261u },
- { 3631796911038383102u, 2691539602252904735u, 109227397880u },
- { 898318840772166823u, 3775467271962795241u, 248145908654u },
- { 17293677953982795024u, 16980212613224918121u, 174204668490u },
- { 7353628266884669440u, 4172857038337333440u, 74920499170u },
- { 2404693032470315008u, 5936867627376461659u, 226226211033u },
- { 9191155893041889280u, 17856837443266866062u, 217321838238u },
- { 6353946855033798656u, 8956297047799810807u, 158968021097u },
- { 3767824038248841216u, 15356974049716912789u, 105485521835u },
- { 7205759403792793600u, 6923608913322982854u, 171832503231u },
- { 0u, 4855902993563955944u, 191375329591u },
- { 0u, 13835893222288330752u, 55263239028u },
- { 0u, 9114973913760137216u, 116750045274u },
- { 0u, 17937099003422310400u, 90494123725u },
- { 0u, 7007960010734960640u, 205972372085u },
- { 0u, 7683422439270776832u, 117379902273u },
- { 0u, 720575940379279360u, 65416519165u },
- { 0u, 0u, 253039062500u },
- { 0u, 0u, 228000000000u },
- { 17063068157692817751u, 40783152u, 0u },
- { 5385330256507239985u, 40783152924990778u, 0u },
- { 3373050282752075748u, 2768933352715741194u, 2210859u },
- { 4116064001262906061u, 15201941611824153390u, 43150104177u },
- { 11306582046748043076u, 1418128541727000180u, 113824098906u },
- { 17035410946089626406u, 5353350204565757408u, 90076876902u },
- { 15618595715183448558u, 1721001680354286741u, 102290205696u },
- { 5141740092277295680u, 637631411660453962u, 93295688u },
- { 16973644291514990592u, 1630012588870568400u, 72034566068u },
- { 14625255268443750400u, 9253063571656828156u, 180088363159u },
- { 14021170507320131584u, 6029146854993203780u, 151501609581u },
- { 4451355232865091584u, 16987401965352759896u, 109326840705u },
- { 12891553933348044800u, 14499131620542087970u, 129920888905u },
- { 1152921504606846976u, 1978417255298660539u, 73785999500u },
- { 0u, 5790079354402454176u, 140107250214u },
- { 0u, 13748918935842078720u, 38313880830u },
- { 0u, 18047438014740692992u, 254745330388u },
- { 0u, 3116889656839372800u, 212978353575u },
- { 0u, 15995952446606147584u, 167168966926u },
- { 0u, 12530140063251562496u, 14867142319u },
- { 0u, 16717361816799281152u, 175679260253u },
- { 0u, 0u, 93906250000u },
- { 0u, 0u, 16000000000u },
- { 5562205901560339855u, 622u, 0u },
- { 2106077949367544134u, 622301527786u, 0u },
- { 7496855998374373623u, 13558973353698967386u, 33u },
- { 229183437194837004u, 6228991722850501890u, 33735033418u },
- { 465169186276472889u, 16886831391703377787u, 74337674317u },
- { 2152980561625316473u, 1181713637872883048u, 77915436964u },
- { 2059790725449340402u, 12393932434925221726u, 164064060824u },
- { 17891190926410198930u, 10684799845419711910u, 152671876423u },
- { 9930696175609809814u, 4590318792215640843u, 71579224160u },
- { 7276914261609005312u, 6383712187366189238u, 96248841680u },
- { 10539762974036983808u, 1904270214927675016u, 208346061731u },
- { 12851089458992250880u, 3711506775113308575u, 163103230695u },
- { 9449311677678878720u, 8091219444738793995u, 231201201185u },
- { 8699564697382289408u, 39436684991068052u, 33438625885u },
- { 4224376450473525248u, 18025182908196512891u, 93002137866u },
- { 4611686018427387904u, 7853924592034603138u, 10977147123u },
- { 0u, 4815749283615688320u, 243425762105u },
- { 0u, 14242399906544287744u, 57261062291u },
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- { 0u, 2705021334614720768u, 168765379752u },
- { 0u, 7017988973805568000u, 168146639500u },
- { 0u, 10956732053634154496u, 140380445944u },
- { 0u, 14657517938546835456u, 248593965634u },
- { 0u, 11268868284797157376u, 66794585639u },
- { 0u, 14600669991935148032u, 39610886573u },
- { 0u, 4611686018427387904u, 173791503906u },
- { 0u, 0u, 34250000000u },
- { 0u, 0u, 128000000000u },
- { 8201586317771250746u, 1424047269u, 0u },
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- { 8127117908566000904u, 9842279843006544554u, 993304354u },
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- { 6249718665174839700u, 609751749293657672u, 211399899256u },
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- { 16762592482501635397u, 10441677090043619866u, 165554557864u },
- { 5550125446725071998u, 4996681336392922375u, 168566044449u },
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- { 1503521728674735398u, 8180812057779384577u, 110006749001u },
- { 4250415082606384364u, 5294232873532946716u, 73443482710u },
- { 6020091901030562974u, 2885620189169448039u, 86287000939u },
- { 16288222967151527138u, 16662526875008170507u, 107156429783u },
- { 6377016228656203782u, 15663095032402672480u, 215903277391u },
- { 8378856515587563750u, 1824281504410546614u, 79849098083u },
- { 15812881490200838483u, 9506565509584809953u, 99098894498u },
- { 4548570371183413652u, 16941136942345070055u, 162515351948u },
- { 16731431495283420383u, 15924115693705937725u, 140918380873u },
- { 14737727629551135532u, 9247807690406628462u, 73863248041u },
- { 12413722258104293893u, 7993916633864834871u, 169501324659u },
- { 800899742400762438u, 1018504409177639408u, 115433351089u },
- { 603197008376033550u, 12097800686634130718u, 177055213234u },
- { 6380777281587743935u, 6221488888422637551u, 178655823089u },
- { 10001440249018225388u, 8229322865256080421u, 241337267588u },
- { 5505914461980436708u, 7927745108183101786u, 132446112486u },
- { 1105464290051876864u, 8488683721235326653u, 230429763923u },
- { 4500443576769970176u, 11165516518170922283u, 83460172466u },
- { 2843045143185981440u, 5463648141113596927u, 178605283863u },
- { 660949699682893824u, 3958440403860778042u, 23296184959u },
- { 276549164618219520u, 5091534813990256011u, 127214587484u },
- { 4683743612465315840u, 6100166970623291280u, 92276012655u },
- { 0u, 1913011027739012426u, 111330690714u },
- { 0u, 11310957650604221440u, 154103704535u },
- { 0u, 16303817257009020928u, 215613168242u },
- { 0u, 9090406322154766336u, 114883831704u },
- { 0u, 3003279315069566976u, 152492791914u },
- { 0u, 16582887146675765248u, 106162808097u },
- { 0u, 9691746398101307392u, 33898960113u },
- { 0u, 0u, 241525390625u },
- { 0u, 0u, 33000000000u },
-};
-
-_LIBCPP_END_NAMESPACE_STD
-
-// clang-format on
-
-#endif // _LIBCPP_SRC_INCLUDE_RYU_D2FIXED_FULL_TABLE_H
diff --git a/src/include/ryu/d2s.h b/src/include/ryu/d2s.h
deleted file mode 100644
index 15d50fd..0000000
--- a/src/include/ryu/d2s.h
+++ /dev/null
@@ -1,62 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Copyright (c) Microsoft Corporation.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-// Copyright 2018 Ulf Adams
-// Copyright (c) Microsoft Corporation. All rights reserved.
-
-// Boost Software License - Version 1.0 - August 17th, 2003
-
-// Permission is hereby granted, free of charge, to any person or organization
-// obtaining a copy of the software and accompanying documentation covered by
-// this license (the "Software") to use, reproduce, display, distribute,
-// execute, and transmit the Software, and to prepare derivative works of the
-// Software, and to permit third-parties to whom the Software is furnished to
-// do so, all subject to the following:
-
-// The copyright notices in the Software and this entire statement, including
-// the above license grant, this restriction and the following disclaimer,
-// must be included in all copies of the Software, in whole or in part, and
-// all derivative works of the Software, unless such copies or derivative
-// works are solely in the form of machine-executable object code generated by
-// a source language processor.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-#ifndef _LIBCPP_SRC_INCLUDE_RYU_DS2_H
-#define _LIBCPP_SRC_INCLUDE_RYU_DS2_H
-
-// Avoid formatting to keep the changes with the original code minimal.
-// clang-format off
-
-#include "__config"
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-inline constexpr int __DOUBLE_MANTISSA_BITS = 52;
-inline constexpr int __DOUBLE_EXPONENT_BITS = 11;
-inline constexpr int __DOUBLE_BIAS = 1023;
-
-inline constexpr int __DOUBLE_POW5_INV_BITCOUNT = 122;
-inline constexpr int __DOUBLE_POW5_BITCOUNT = 121;
-
-[[nodiscard]] to_chars_result __d2s_buffered_n(char* const _First, char* const _Last, const double __f, const chars_format _Fmt);
-
-_LIBCPP_END_NAMESPACE_STD
-
-// clang-format on
-
-#endif // _LIBCPP_SRC_INCLUDE_RYU_DS2_H
diff --git a/src/include/ryu/d2s_full_table.h b/src/include/ryu/d2s_full_table.h
deleted file mode 100644
index 106fef0..0000000
--- a/src/include/ryu/d2s_full_table.h
+++ /dev/null
@@ -1,368 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Copyright (c) Microsoft Corporation.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-// Copyright 2018 Ulf Adams
-// Copyright (c) Microsoft Corporation. All rights reserved.
-
-// Boost Software License - Version 1.0 - August 17th, 2003
-
-// Permission is hereby granted, free of charge, to any person or organization
-// obtaining a copy of the software and accompanying documentation covered by
-// this license (the "Software") to use, reproduce, display, distribute,
-// execute, and transmit the Software, and to prepare derivative works of the
-// Software, and to permit third-parties to whom the Software is furnished to
-// do so, all subject to the following:
-
-// The copyright notices in the Software and this entire statement, including
-// the above license grant, this restriction and the following disclaimer,
-// must be included in all copies of the Software, in whole or in part, and
-// all derivative works of the Software, unless such copies or derivative
-// works are solely in the form of machine-executable object code generated by
-// a source language processor.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-#ifndef _LIBCPP_SRC_INCLUDE_RYU_D2S_FULL_TABLE_H
-#define _LIBCPP_SRC_INCLUDE_RYU_D2S_FULL_TABLE_H
-
-// Avoid formatting to keep the changes with the original code minimal.
-// clang-format off
-
-#include "__config"
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-inline constexpr uint64_t __DOUBLE_POW5_INV_SPLIT[292][2] = {
- { 1u, 288230376151711744u }, { 3689348814741910324u, 230584300921369395u },
- { 2951479051793528259u, 184467440737095516u }, { 17118578500402463900u, 147573952589676412u },
- { 12632330341676300947u, 236118324143482260u }, { 10105864273341040758u, 188894659314785808u },
- { 15463389048156653253u, 151115727451828646u }, { 17362724847566824558u, 241785163922925834u },
- { 17579528692795369969u, 193428131138340667u }, { 6684925324752475329u, 154742504910672534u },
- { 18074578149087781173u, 247588007857076054u }, { 18149011334012135262u, 198070406285660843u },
- { 3451162622983977240u, 158456325028528675u }, { 5521860196774363583u, 253530120045645880u },
- { 4417488157419490867u, 202824096036516704u }, { 7223339340677503017u, 162259276829213363u },
- { 7867994130342094503u, 259614842926741381u }, { 2605046489531765280u, 207691874341393105u },
- { 2084037191625412224u, 166153499473114484u }, { 10713157136084480204u, 265845599156983174u },
- { 12259874523609494487u, 212676479325586539u }, { 13497248433629505913u, 170141183460469231u },
- { 14216899864323388813u, 272225893536750770u }, { 11373519891458711051u, 217780714829400616u },
- { 5409467098425058518u, 174224571863520493u }, { 4965798542738183305u, 278759314981632789u },
- { 7661987648932456967u, 223007451985306231u }, { 2440241304404055250u, 178405961588244985u },
- { 3904386087046488400u, 285449538541191976u }, { 17880904128604832013u, 228359630832953580u },
- { 14304723302883865611u, 182687704666362864u }, { 15133127457049002812u, 146150163733090291u },
- { 16834306301794583852u, 233840261972944466u }, { 9778096226693756759u, 187072209578355573u },
- { 15201174610838826053u, 149657767662684458u }, { 2185786488890659746u, 239452428260295134u },
- { 5437978005854438120u, 191561942608236107u }, { 15418428848909281466u, 153249554086588885u },
- { 6222742084545298729u, 245199286538542217u }, { 16046240111861969953u, 196159429230833773u },
- { 1768945645263844993u, 156927543384667019u }, { 10209010661905972635u, 251084069415467230u },
- { 8167208529524778108u, 200867255532373784u }, { 10223115638361732810u, 160693804425899027u },
- { 1599589762411131202u, 257110087081438444u }, { 4969020624670815285u, 205688069665150755u },
- { 3975216499736652228u, 164550455732120604u }, { 13739044029062464211u, 263280729171392966u },
- { 7301886408508061046u, 210624583337114373u }, { 13220206756290269483u, 168499666669691498u },
- { 17462981995322520850u, 269599466671506397u }, { 6591687966774196033u, 215679573337205118u },
- { 12652048002903177473u, 172543658669764094u }, { 9175230360419352987u, 276069853871622551u },
- { 3650835473593572067u, 220855883097298041u }, { 17678063637842498946u, 176684706477838432u },
- { 13527506561580357021u, 282695530364541492u }, { 3443307619780464970u, 226156424291633194u },
- { 6443994910566282300u, 180925139433306555u }, { 5155195928453025840u, 144740111546645244u },
- { 15627011115008661990u, 231584178474632390u }, { 12501608892006929592u, 185267342779705912u },
- { 2622589484121723027u, 148213874223764730u }, { 4196143174594756843u, 237142198758023568u },
- { 10735612169159626121u, 189713759006418854u }, { 12277838550069611220u, 151771007205135083u },
- { 15955192865369467629u, 242833611528216133u }, { 1696107848069843133u, 194266889222572907u },
- { 12424932722681605476u, 155413511378058325u }, { 1433148282581017146u, 248661618204893321u },
- { 15903913885032455010u, 198929294563914656u }, { 9033782293284053685u, 159143435651131725u },
- { 14454051669254485895u, 254629497041810760u }, { 11563241335403588716u, 203703597633448608u },
- { 16629290697806691620u, 162962878106758886u }, { 781423413297334329u, 260740604970814219u },
- { 4314487545379777786u, 208592483976651375u }, { 3451590036303822229u, 166873987181321100u },
- { 5522544058086115566u, 266998379490113760u }, { 4418035246468892453u, 213598703592091008u },
- { 10913125826658934609u, 170878962873672806u }, { 10082303693170474728u, 273406340597876490u },
- { 8065842954536379782u, 218725072478301192u }, { 17520720807854834795u, 174980057982640953u },
- { 5897060404116273733u, 279968092772225526u }, { 1028299508551108663u, 223974474217780421u },
- { 15580034865808528224u, 179179579374224336u }, { 17549358155809824511u, 286687326998758938u },
- { 2971440080422128639u, 229349861599007151u }, { 17134547323305344204u, 183479889279205720u },
- { 13707637858644275364u, 146783911423364576u }, { 14553522944347019935u, 234854258277383322u },
- { 4264120725993795302u, 187883406621906658u }, { 10789994210278856888u, 150306725297525326u },
- { 9885293106962350374u, 240490760476040522u }, { 529536856086059653u, 192392608380832418u },
- { 7802327114352668369u, 153914086704665934u }, { 1415676938738538420u, 246262538727465495u },
- { 1132541550990830736u, 197010030981972396u }, { 15663428499760305882u, 157608024785577916u },
- { 17682787970132668764u, 252172839656924666u }, { 10456881561364224688u, 201738271725539733u },
- { 15744202878575200397u, 161390617380431786u }, { 17812026976236499989u, 258224987808690858u },
- { 3181575136763469022u, 206579990246952687u }, { 13613306553636506187u, 165263992197562149u },
- { 10713244041592678929u, 264422387516099439u }, { 12259944048016053467u, 211537910012879551u },
- { 6118606423670932450u, 169230328010303641u }, { 2411072648389671274u, 270768524816485826u },
- { 16686253377679378312u, 216614819853188660u }, { 13349002702143502650u, 173291855882550928u },
- { 17669055508687693916u, 277266969412081485u }, { 14135244406950155133u, 221813575529665188u },
- { 240149081334393137u, 177450860423732151u }, { 11452284974360759988u, 283921376677971441u },
- { 5472479164746697667u, 227137101342377153u }, { 11756680961281178780u, 181709681073901722u },
- { 2026647139541122378u, 145367744859121378u }, { 18000030682233437097u, 232588391774594204u },
- { 18089373360528660001u, 186070713419675363u }, { 3403452244197197031u, 148856570735740291u },
- { 16513570034941246220u, 238170513177184465u }, { 13210856027952996976u, 190536410541747572u },
- { 3189987192878576934u, 152429128433398058u }, { 1414630693863812771u, 243886605493436893u },
- { 8510402184574870864u, 195109284394749514u }, { 10497670562401807014u, 156087427515799611u },
- { 9417575270359070576u, 249739884025279378u }, { 14912757845771077107u, 199791907220223502u },
- { 4551508647133041040u, 159833525776178802u }, { 10971762650154775986u, 255733641241886083u },
- { 16156107749607641435u, 204586912993508866u }, { 9235537384944202825u, 163669530394807093u },
- { 11087511001168814197u, 261871248631691349u }, { 12559357615676961681u, 209496998905353079u },
- { 13736834907283479668u, 167597599124282463u }, { 18289587036911657145u, 268156158598851941u },
- { 10942320814787415393u, 214524926879081553u }, { 16132554281313752961u, 171619941503265242u },
- { 11054691591134363444u, 274591906405224388u }, { 16222450902391311402u, 219673525124179510u },
- { 12977960721913049122u, 175738820099343608u }, { 17075388340318968271u, 281182112158949773u },
- { 2592264228029443648u, 224945689727159819u }, { 5763160197165465241u, 179956551781727855u },
- { 9221056315464744386u, 287930482850764568u }, { 14755542681855616155u, 230344386280611654u },
- { 15493782960226403247u, 184275509024489323u }, { 1326979923955391628u, 147420407219591459u },
- { 9501865507812447252u, 235872651551346334u }, { 11290841220991868125u, 188698121241077067u },
- { 1653975347309673853u, 150958496992861654u }, { 10025058185179298811u, 241533595188578646u },
- { 4330697733401528726u, 193226876150862917u }, { 14532604630946953951u, 154581500920690333u },
- { 1116074521063664381u, 247330401473104534u }, { 4582208431592841828u, 197864321178483627u },
- { 14733813189500004432u, 158291456942786901u }, { 16195403473716186445u, 253266331108459042u },
- { 5577625149489128510u, 202613064886767234u }, { 8151448934333213131u, 162090451909413787u },
- { 16731667109675051333u, 259344723055062059u }, { 17074682502481951390u, 207475778444049647u },
- { 6281048372501740465u, 165980622755239718u }, { 6360328581260874421u, 265568996408383549u },
- { 8777611679750609860u, 212455197126706839u }, { 10711438158542398211u, 169964157701365471u },
- { 9759603424184016492u, 271942652322184754u }, { 11497031554089123517u, 217554121857747803u },
- { 16576322872755119460u, 174043297486198242u }, { 11764721337440549842u, 278469275977917188u },
- { 16790474699436260520u, 222775420782333750u }, { 13432379759549008416u, 178220336625867000u },
- { 3045063541568861850u, 285152538601387201u }, { 17193446092222730773u, 228122030881109760u },
- { 13754756873778184618u, 182497624704887808u }, { 18382503128506368341u, 145998099763910246u },
- { 3586563302416817083u, 233596959622256395u }, { 2869250641933453667u, 186877567697805116u },
- { 17052795772514404226u, 149502054158244092u }, { 12527077977055405469u, 239203286653190548u },
- { 17400360011128145022u, 191362629322552438u }, { 2852241564676785048u, 153090103458041951u },
- { 15631632947708587046u, 244944165532867121u }, { 8815957543424959314u, 195955332426293697u },
- { 18120812478965698421u, 156764265941034957u }, { 14235904707377476180u, 250822825505655932u },
- { 4010026136418160298u, 200658260404524746u }, { 17965416168102169531u, 160526608323619796u },
- { 2919224165770098987u, 256842573317791675u }, { 2335379332616079190u, 205474058654233340u },
- { 1868303466092863352u, 164379246923386672u }, { 6678634360490491686u, 263006795077418675u },
- { 5342907488392393349u, 210405436061934940u }, { 4274325990713914679u, 168324348849547952u },
- { 10528270399884173809u, 269318958159276723u }, { 15801313949391159694u, 215455166527421378u },
- { 1573004715287196786u, 172364133221937103u }, { 17274202803427156150u, 275782613155099364u },
- { 17508711057483635243u, 220626090524079491u }, { 10317620031244997871u, 176500872419263593u },
- { 12818843235250086271u, 282401395870821749u }, { 13944423402941979340u, 225921116696657399u },
- { 14844887537095493795u, 180736893357325919u }, { 15565258844418305359u, 144589514685860735u },
- { 6457670077359736959u, 231343223497377177u }, { 16234182506113520537u, 185074578797901741u },
- { 9297997190148906106u, 148059663038321393u }, { 11187446689496339446u, 236895460861314229u },
- { 12639306166338981880u, 189516368689051383u }, { 17490142562555006151u, 151613094951241106u },
- { 2158786396894637579u, 242580951921985771u }, { 16484424376483351356u, 194064761537588616u },
- { 9498190686444770762u, 155251809230070893u }, { 11507756283569722895u, 248402894768113429u },
- { 12895553841597688639u, 198722315814490743u }, { 17695140702761971558u, 158977852651592594u },
- { 17244178680193423523u, 254364564242548151u }, { 10105994129412828495u, 203491651394038521u },
- { 4395446488788352473u, 162793321115230817u }, { 10722063196803274280u, 260469313784369307u },
- { 1198952927958798777u, 208375451027495446u }, { 15716557601334680315u, 166700360821996356u },
- { 17767794532651667857u, 266720577315194170u }, { 14214235626121334286u, 213376461852155336u },
- { 7682039686155157106u, 170701169481724269u }, { 1223217053622520399u, 273121871170758831u },
- { 15735968901865657612u, 218497496936607064u }, { 16278123936234436413u, 174797997549285651u },
- { 219556594781725998u, 279676796078857043u }, { 7554342905309201445u, 223741436863085634u },
- { 9732823138989271479u, 178993149490468507u }, { 815121763415193074u, 286389039184749612u },
- { 11720143854957885429u, 229111231347799689u }, { 13065463898708218666u, 183288985078239751u },
- { 6763022304224664610u, 146631188062591801u }, { 3442138057275642729u, 234609900900146882u },
- { 13821756890046245153u, 187687920720117505u }, { 11057405512036996122u, 150150336576094004u },
- { 6623802375033462826u, 240240538521750407u }, { 16367088344252501231u, 192192430817400325u },
- { 13093670675402000985u, 153753944653920260u }, { 2503129006933649959u, 246006311446272417u },
- { 13070549649772650937u, 196805049157017933u }, { 17835137349301941396u, 157444039325614346u },
- { 2710778055689733971u, 251910462920982955u }, { 2168622444551787177u, 201528370336786364u },
- { 5424246770383340065u, 161222696269429091u }, { 1300097203129523457u, 257956314031086546u },
- { 15797473021471260058u, 206365051224869236u }, { 8948629602435097724u, 165092040979895389u },
- { 3249760919670425388u, 264147265567832623u }, { 9978506365220160957u, 211317812454266098u },
- { 15361502721659949412u, 169054249963412878u }, { 2442311466204457120u, 270486799941460606u },
- { 16711244431931206989u, 216389439953168484u }, { 17058344360286875914u, 173111551962534787u },
- { 12535955717491360170u, 276978483140055660u }, { 10028764573993088136u, 221582786512044528u },
- { 15401709288678291155u, 177266229209635622u }, { 9885339602917624555u, 283625966735416996u },
- { 4218922867592189321u, 226900773388333597u }, { 14443184738299482427u, 181520618710666877u },
- { 4175850161155765295u, 145216494968533502u }, { 10370709072591134795u, 232346391949653603u },
- { 15675264887556728482u, 185877113559722882u }, { 5161514280561562140u, 148701690847778306u },
- { 879725219414678777u, 237922705356445290u }, { 703780175531743021u, 190338164285156232u },
- { 11631070584651125387u, 152270531428124985u }, { 162968861732249003u, 243632850284999977u },
- { 11198421533611530172u, 194906280227999981u }, { 5269388412147313814u, 155925024182399985u },
- { 8431021459435702103u, 249480038691839976u }, { 3055468352806651359u, 199584030953471981u },
- { 17201769941212962380u, 159667224762777584u }, { 16454785461715008838u, 255467559620444135u },
- { 13163828369372007071u, 204374047696355308u }, { 17909760324981426303u, 163499238157084246u },
- { 2830174816776909822u, 261598781051334795u }, { 2264139853421527858u, 209279024841067836u },
- { 16568707141704863579u, 167423219872854268u }, { 4373838538276319787u, 267877151796566830u },
- { 3499070830621055830u, 214301721437253464u }, { 6488605479238754987u, 171441377149802771u },
- { 3003071137298187333u, 274306203439684434u }, { 6091805724580460189u, 219444962751747547u },
- { 15941491023890099121u, 175555970201398037u }, { 10748990379256517301u, 280889552322236860u },
- { 8599192303405213841u, 224711641857789488u }, { 14258051472207991719u, 179769313486231590u }
-};
-
-inline constexpr uint64_t __DOUBLE_POW5_SPLIT[326][2] = {
- { 0u, 72057594037927936u }, { 0u, 90071992547409920u },
- { 0u, 112589990684262400u }, { 0u, 140737488355328000u },
- { 0u, 87960930222080000u }, { 0u, 109951162777600000u },
- { 0u, 137438953472000000u }, { 0u, 85899345920000000u },
- { 0u, 107374182400000000u }, { 0u, 134217728000000000u },
- { 0u, 83886080000000000u }, { 0u, 104857600000000000u },
- { 0u, 131072000000000000u }, { 0u, 81920000000000000u },
- { 0u, 102400000000000000u }, { 0u, 128000000000000000u },
- { 0u, 80000000000000000u }, { 0u, 100000000000000000u },
- { 0u, 125000000000000000u }, { 0u, 78125000000000000u },
- { 0u, 97656250000000000u }, { 0u, 122070312500000000u },
- { 0u, 76293945312500000u }, { 0u, 95367431640625000u },
- { 0u, 119209289550781250u }, { 4611686018427387904u, 74505805969238281u },
- { 10376293541461622784u, 93132257461547851u }, { 8358680908399640576u, 116415321826934814u },
- { 612489549322387456u, 72759576141834259u }, { 14600669991935148032u, 90949470177292823u },
- { 13639151471491547136u, 113686837721616029u }, { 3213881284082270208u, 142108547152020037u },
- { 4314518811765112832u, 88817841970012523u }, { 781462496279003136u, 111022302462515654u },
- { 10200200157203529728u, 138777878078144567u }, { 13292654125893287936u, 86736173798840354u },
- { 7392445620511834112u, 108420217248550443u }, { 4628871007212404736u, 135525271560688054u },
- { 16728102434789916672u, 84703294725430033u }, { 7075069988205232128u, 105879118406787542u },
- { 18067209522111315968u, 132348898008484427u }, { 8986162942105878528u, 82718061255302767u },
- { 6621017659204960256u, 103397576569128459u }, { 3664586055578812416u, 129246970711410574u },
- { 16125424340018921472u, 80779356694631608u }, { 1710036351314100224u, 100974195868289511u },
- { 15972603494424788992u, 126217744835361888u }, { 9982877184015493120u, 78886090522101180u },
- { 12478596480019366400u, 98607613152626475u }, { 10986559581596820096u, 123259516440783094u },
- { 2254913720070624656u, 77037197775489434u }, { 12042014186943056628u, 96296497219361792u },
- { 15052517733678820785u, 120370621524202240u }, { 9407823583549262990u, 75231638452626400u },
- { 11759779479436578738u, 94039548065783000u }, { 14699724349295723422u, 117549435082228750u },
- { 4575641699882439235u, 73468396926392969u }, { 10331238143280436948u, 91835496157991211u },
- { 8302361660673158281u, 114794370197489014u }, { 1154580038986672043u, 143492962746861268u },
- { 9944984561221445835u, 89683101716788292u }, { 12431230701526807293u, 112103877145985365u },
- { 1703980321626345405u, 140129846432481707u }, { 17205888765512323542u, 87581154020301066u },
- { 12283988920035628619u, 109476442525376333u }, { 1519928094762372062u, 136845553156720417u },
- { 12479170105294952299u, 85528470722950260u }, { 15598962631618690374u, 106910588403687825u },
- { 5663645234241199255u, 133638235504609782u }, { 17374836326682913246u, 83523897190381113u },
- { 7883487353071477846u, 104404871487976392u }, { 9854359191339347308u, 130506089359970490u },
- { 10770660513014479971u, 81566305849981556u }, { 13463325641268099964u, 101957882312476945u },
- { 2994098996302961243u, 127447352890596182u }, { 15706369927971514489u, 79654595556622613u },
- { 5797904354682229399u, 99568244445778267u }, { 2635694424925398845u, 124460305557222834u },
- { 6258995034005762182u, 77787690973264271u }, { 3212057774079814824u, 97234613716580339u },
- { 17850130272881932242u, 121543267145725423u }, { 18073860448192289507u, 75964541966078389u },
- { 8757267504958198172u, 94955677457597987u }, { 6334898362770359811u, 118694596821997484u },
- { 13182683513586250689u, 74184123013748427u }, { 11866668373555425458u, 92730153767185534u },
- { 5609963430089506015u, 115912692208981918u }, { 17341285199088104971u, 72445432630613698u },
- { 12453234462005355406u, 90556790788267123u }, { 10954857059079306353u, 113195988485333904u },
- { 13693571323849132942u, 141494985606667380u }, { 17781854114260483896u, 88434366004167112u },
- { 3780573569116053255u, 110542957505208891u }, { 114030942967678664u, 138178696881511114u },
- { 4682955357782187069u, 86361685550944446u }, { 15077066234082509644u, 107952106938680557u },
- { 5011274737320973344u, 134940133673350697u }, { 14661261756894078100u, 84337583545844185u },
- { 4491519140835433913u, 105421979432305232u }, { 5614398926044292391u, 131777474290381540u },
- { 12732371365632458552u, 82360921431488462u }, { 6692092170185797382u, 102951151789360578u },
- { 17588487249587022536u, 128688939736700722u }, { 15604490549419276989u, 80430587335437951u },
- { 14893927168346708332u, 100538234169297439u }, { 14005722942005997511u, 125672792711621799u },
- { 15671105866394830300u, 78545495444763624u }, { 1142138259283986260u, 98181869305954531u },
- { 15262730879387146537u, 122727336632443163u }, { 7233363790403272633u, 76704585395276977u },
- { 13653390756431478696u, 95880731744096221u }, { 3231680390257184658u, 119850914680120277u },
- { 4325643253124434363u, 74906821675075173u }, { 10018740084832930858u, 93633527093843966u },
- { 3300053069186387764u, 117041908867304958u }, { 15897591223523656064u, 73151193042065598u },
- { 10648616992549794273u, 91438991302581998u }, { 4087399203832467033u, 114298739128227498u },
- { 14332621041645359599u, 142873423910284372u }, { 18181260187883125557u, 89295889943927732u },
- { 4279831161144355331u, 111619862429909666u }, { 14573160988285219972u, 139524828037387082u },
- { 13719911636105650386u, 87203017523366926u }, { 7926517508277287175u, 109003771904208658u },
- { 684774848491833161u, 136254714880260823u }, { 7345513307948477581u, 85159196800163014u },
- { 18405263671790372785u, 106448996000203767u }, { 18394893571310578077u, 133061245000254709u },
- { 13802651491282805250u, 83163278125159193u }, { 3418256308821342851u, 103954097656448992u },
- { 4272820386026678563u, 129942622070561240u }, { 2670512741266674102u, 81214138794100775u },
- { 17173198981865506339u, 101517673492625968u }, { 3019754653622331308u, 126897091865782461u },
- { 4193189667727651020u, 79310682416114038u }, { 14464859121514339583u, 99138353020142547u },
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- { 4305483574047142354u, 102613420032459406u }, { 14605226504413703751u, 128266775040574257u },
- { 2210737537617482988u, 80166734400358911u }, { 16598479977304017447u, 100208418000448638u },
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- { 17074144231291089770u, 97859783203563123u }, { 16730994270686474309u, 122324729004453904u },
- { 10456871419179046443u, 76452955627783690u }, { 3847717237119032246u, 95566194534729613u },
- { 9421332564826178211u, 119457743168412016u }, { 5888332853016361382u, 74661089480257510u },
- { 16583788103125227536u, 93326361850321887u }, { 16118049110479146516u, 116657952312902359u },
- { 16991309721690548428u, 72911220195563974u }, { 12015765115258409727u, 91139025244454968u },
- { 15019706394073012159u, 113923781555568710u }, { 9551260955736489391u, 142404726944460888u },
- { 5969538097335305869u, 89002954340288055u }, { 2850236603241744433u, 111253692925360069u }
-};
-
-_LIBCPP_END_NAMESPACE_STD
-
-// clang-format on
-
-#endif // _LIBCPP_SRC_INCLUDE_RYU_D2S_FULL_TABLE_H
diff --git a/src/include/ryu/d2s_intrinsics.h b/src/include/ryu/d2s_intrinsics.h
deleted file mode 100644
index 9f6632e..0000000
--- a/src/include/ryu/d2s_intrinsics.h
+++ /dev/null
@@ -1,257 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Copyright (c) Microsoft Corporation.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-// Copyright 2018 Ulf Adams
-// Copyright (c) Microsoft Corporation. All rights reserved.
-
-// Boost Software License - Version 1.0 - August 17th, 2003
-
-// Permission is hereby granted, free of charge, to any person or organization
-// obtaining a copy of the software and accompanying documentation covered by
-// this license (the "Software") to use, reproduce, display, distribute,
-// execute, and transmit the Software, and to prepare derivative works of the
-// Software, and to permit third-parties to whom the Software is furnished to
-// do so, all subject to the following:
-
-// The copyright notices in the Software and this entire statement, including
-// the above license grant, this restriction and the following disclaimer,
-// must be included in all copies of the Software, in whole or in part, and
-// all derivative works of the Software, unless such copies or derivative
-// works are solely in the form of machine-executable object code generated by
-// a source language processor.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-#ifndef _LIBCPP_SRC_INCLUDE_RYU_DS2_INTRINSICS_H
-#define _LIBCPP_SRC_INCLUDE_RYU_DS2_INTRINSICS_H
-
-// Avoid formatting to keep the changes with the original code minimal.
-// clang-format off
-
-#include "__config"
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-#if defined(_M_X64) && defined(_MSC_VER)
-#define _LIBCPP_INTRINSIC128 1
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __ryu_umul128(const uint64_t __a, const uint64_t __b, uint64_t* const __productHi) {
- return _umul128(__a, __b, __productHi);
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __ryu_shiftright128(const uint64_t __lo, const uint64_t __hi, const uint32_t __dist) {
- // For the __shiftright128 intrinsic, the shift value is always
- // modulo 64.
- // In the current implementation of the double-precision version
- // of Ryu, the shift value is always < 64.
- // (The shift value is in the range [49, 58].)
- // Check this here in case a future change requires larger shift
- // values. In this case this function needs to be adjusted.
- _LIBCPP_ASSERT(__dist < 64, "");
- return __shiftright128(__lo, __hi, static_cast<unsigned char>(__dist));
-}
-
-// ^^^ intrinsics available ^^^ / vvv __int128 available vvv
-#elif defined(__SIZEOF_INT128__) && ( \
- (defined(__clang__) && !defined(_MSC_VER)) || \
- (defined(__GNUC__) && !defined(__clang__) && !defined(__CUDACC__)))
-#define _LIBCPP_INTRINSIC128 1
- // We have __uint128 support in clang or gcc
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __ryu_umul128(const uint64_t __a, const uint64_t __b, uint64_t* const __productHi) {
- auto __temp = __a * (unsigned __int128)__b;
- *__productHi = __temp >> 64;
- return static_cast<uint64_t>(__temp);
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __ryu_shiftright128(const uint64_t __lo, const uint64_t __hi, const uint32_t __dist) {
- // In the current implementation of the double-precision version
- // of Ryu, the shift value is always < 64.
- // (The shift value is in the range [49, 58].)
- // Check this here in case a future change requires larger shift
- // values. In this case this function needs to be adjusted.
- _LIBCPP_ASSERT(__dist < 64, "");
- auto __temp = __lo | ((unsigned __int128)__hi << 64);
- // For x64 128-bit shfits using the `shrd` instruction and two 64-bit
- // registers, the shift value is modulo 64. Thus the `& 63` is free.
- return static_cast<uint64_t>(__temp >> (__dist & 63));
-}
-#else // ^^^ __int128 available ^^^ / vvv intrinsics unavailable vvv
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline _LIBCPP_ALWAYS_INLINE uint64_t __ryu_umul128(const uint64_t __a, const uint64_t __b, uint64_t* const __productHi) {
- // TRANSITION, VSO-634761
- // The casts here help MSVC to avoid calls to the __allmul library function.
- const uint32_t __aLo = static_cast<uint32_t>(__a);
- const uint32_t __aHi = static_cast<uint32_t>(__a >> 32);
- const uint32_t __bLo = static_cast<uint32_t>(__b);
- const uint32_t __bHi = static_cast<uint32_t>(__b >> 32);
-
- const uint64_t __b00 = static_cast<uint64_t>(__aLo) * __bLo;
- const uint64_t __b01 = static_cast<uint64_t>(__aLo) * __bHi;
- const uint64_t __b10 = static_cast<uint64_t>(__aHi) * __bLo;
- const uint64_t __b11 = static_cast<uint64_t>(__aHi) * __bHi;
-
- const uint32_t __b00Lo = static_cast<uint32_t>(__b00);
- const uint32_t __b00Hi = static_cast<uint32_t>(__b00 >> 32);
-
- const uint64_t __mid1 = __b10 + __b00Hi;
- const uint32_t __mid1Lo = static_cast<uint32_t>(__mid1);
- const uint32_t __mid1Hi = static_cast<uint32_t>(__mid1 >> 32);
-
- const uint64_t __mid2 = __b01 + __mid1Lo;
- const uint32_t __mid2Lo = static_cast<uint32_t>(__mid2);
- const uint32_t __mid2Hi = static_cast<uint32_t>(__mid2 >> 32);
-
- const uint64_t __pHi = __b11 + __mid1Hi + __mid2Hi;
- const uint64_t __pLo = (static_cast<uint64_t>(__mid2Lo) << 32) | __b00Lo;
-
- *__productHi = __pHi;
- return __pLo;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __ryu_shiftright128(const uint64_t __lo, const uint64_t __hi, const uint32_t __dist) {
- // We don't need to handle the case __dist >= 64 here (see above).
- _LIBCPP_ASSERT(__dist < 64, "");
-#ifdef _LIBCPP_64_BIT
- _LIBCPP_ASSERT(__dist > 0, "");
- return (__hi << (64 - __dist)) | (__lo >> __dist);
-#else // ^^^ 64-bit ^^^ / vvv 32-bit vvv
- // Avoid a 64-bit shift by taking advantage of the range of shift values.
- _LIBCPP_ASSERT(__dist >= 32, "");
- return (__hi << (64 - __dist)) | (static_cast<uint32_t>(__lo >> 32) >> (__dist - 32));
-#endif // ^^^ 32-bit ^^^
-}
-
-#endif // ^^^ intrinsics unavailable ^^^
-
-#ifndef _LIBCPP_64_BIT
-
-// Returns the high 64 bits of the 128-bit product of __a and __b.
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __umulh(const uint64_t __a, const uint64_t __b) {
- // Reuse the __ryu_umul128 implementation.
- // Optimizers will likely eliminate the instructions used to compute the
- // low part of the product.
- uint64_t __hi;
- (void) __ryu_umul128(__a, __b, &__hi);
- return __hi;
-}
-
-// On 32-bit platforms, compilers typically generate calls to library
-// functions for 64-bit divisions, even if the divisor is a constant.
-//
-// TRANSITION, LLVM-37932
-//
-// The functions here perform division-by-constant using multiplications
-// in the same way as 64-bit compilers would do.
-//
-// NB:
-// The multipliers and shift values are the ones generated by clang x64
-// for expressions like x/5, x/10, etc.
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div5(const uint64_t __x) {
- return __umulh(__x, 0xCCCCCCCCCCCCCCCDu) >> 2;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div10(const uint64_t __x) {
- return __umulh(__x, 0xCCCCCCCCCCCCCCCDu) >> 3;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div100(const uint64_t __x) {
- return __umulh(__x >> 2, 0x28F5C28F5C28F5C3u) >> 2;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div1e8(const uint64_t __x) {
- return __umulh(__x, 0xABCC77118461CEFDu) >> 26;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div1e9(const uint64_t __x) {
- return __umulh(__x >> 9, 0x44B82FA09B5A53u) >> 11;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __mod1e9(const uint64_t __x) {
- // Avoid 64-bit math as much as possible.
- // Returning static_cast<uint32_t>(__x - 1000000000 * __div1e9(__x)) would
- // perform 32x64-bit multiplication and 64-bit subtraction.
- // __x and 1000000000 * __div1e9(__x) are guaranteed to differ by
- // less than 10^9, so their highest 32 bits must be identical,
- // so we can truncate both sides to uint32_t before subtracting.
- // We can also simplify static_cast<uint32_t>(1000000000 * __div1e9(__x)).
- // We can truncate before multiplying instead of after, as multiplying
- // the highest 32 bits of __div1e9(__x) can't affect the lowest 32 bits.
- return static_cast<uint32_t>(__x) - 1000000000 * static_cast<uint32_t>(__div1e9(__x));
-}
-
-#else // ^^^ 32-bit ^^^ / vvv 64-bit vvv
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div5(const uint64_t __x) {
- return __x / 5;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div10(const uint64_t __x) {
- return __x / 10;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div100(const uint64_t __x) {
- return __x / 100;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div1e8(const uint64_t __x) {
- return __x / 100000000;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div1e9(const uint64_t __x) {
- return __x / 1000000000;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __mod1e9(const uint64_t __x) {
- return static_cast<uint32_t>(__x - 1000000000 * __div1e9(__x));
-}
-
-#endif // ^^^ 64-bit ^^^
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __pow5Factor(uint64_t __value) {
- uint32_t __count = 0;
- for (;;) {
- _LIBCPP_ASSERT(__value != 0, "");
- const uint64_t __q = __div5(__value);
- const uint32_t __r = static_cast<uint32_t>(__value) - 5 * static_cast<uint32_t>(__q);
- if (__r != 0) {
- break;
- }
- __value = __q;
- ++__count;
- }
- return __count;
-}
-
-// Returns true if __value is divisible by 5^__p.
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline bool __multipleOfPowerOf5(const uint64_t __value, const uint32_t __p) {
- // I tried a case distinction on __p, but there was no performance difference.
- return __pow5Factor(__value) >= __p;
-}
-
-// Returns true if __value is divisible by 2^__p.
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline bool __multipleOfPowerOf2(const uint64_t __value, const uint32_t __p) {
- _LIBCPP_ASSERT(__value != 0, "");
- _LIBCPP_ASSERT(__p < 64, "");
- // __builtin_ctzll doesn't appear to be faster here.
- return (__value & ((1ull << __p) - 1)) == 0;
-}
-
-_LIBCPP_END_NAMESPACE_STD
-
-// clang-format on
-
-#endif // _LIBCPP_SRC_INCLUDE_RYU_DS2_INTRINSICS_H
diff --git a/src/include/ryu/digit_table.h b/src/include/ryu/digit_table.h
deleted file mode 100644
index 3962f66..0000000
--- a/src/include/ryu/digit_table.h
+++ /dev/null
@@ -1,68 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Copyright (c) Microsoft Corporation.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-// Copyright 2018 Ulf Adams
-// Copyright (c) Microsoft Corporation. All rights reserved.
-
-// Boost Software License - Version 1.0 - August 17th, 2003
-
-// Permission is hereby granted, free of charge, to any person or organization
-// obtaining a copy of the software and accompanying documentation covered by
-// this license (the "Software") to use, reproduce, display, distribute,
-// execute, and transmit the Software, and to prepare derivative works of the
-// Software, and to permit third-parties to whom the Software is furnished to
-// do so, all subject to the following:
-
-// The copyright notices in the Software and this entire statement, including
-// the above license grant, this restriction and the following disclaimer,
-// must be included in all copies of the Software, in whole or in part, and
-// all derivative works of the Software, unless such copies or derivative
-// works are solely in the form of machine-executable object code generated by
-// a source language processor.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-#ifndef _LIBCPP_SRC_INCLUDE_RYU_DIGIT_TABLE_H
-#define _LIBCPP_SRC_INCLUDE_RYU_DIGIT_TABLE_H
-
-// Avoid formatting to keep the changes with the original code minimal.
-// clang-format off
-
-#include "__config"
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-// A table of all two-digit numbers. This is used to speed up decimal digit
-// generation by copying pairs of digits into the final output.
-inline constexpr char __DIGIT_TABLE[200] = {
- '0','0','0','1','0','2','0','3','0','4','0','5','0','6','0','7','0','8','0','9',
- '1','0','1','1','1','2','1','3','1','4','1','5','1','6','1','7','1','8','1','9',
- '2','0','2','1','2','2','2','3','2','4','2','5','2','6','2','7','2','8','2','9',
- '3','0','3','1','3','2','3','3','3','4','3','5','3','6','3','7','3','8','3','9',
- '4','0','4','1','4','2','4','3','4','4','4','5','4','6','4','7','4','8','4','9',
- '5','0','5','1','5','2','5','3','5','4','5','5','5','6','5','7','5','8','5','9',
- '6','0','6','1','6','2','6','3','6','4','6','5','6','6','6','7','6','8','6','9',
- '7','0','7','1','7','2','7','3','7','4','7','5','7','6','7','7','7','8','7','9',
- '8','0','8','1','8','2','8','3','8','4','8','5','8','6','8','7','8','8','8','9',
- '9','0','9','1','9','2','9','3','9','4','9','5','9','6','9','7','9','8','9','9'
-};
-
-_LIBCPP_END_NAMESPACE_STD
-
-// clang-format on
-
-#endif // _LIBCPP_SRC_INCLUDE_RYU_DIGIT_TABLE_H
diff --git a/src/include/ryu/f2s.h b/src/include/ryu/f2s.h
deleted file mode 100644
index 80fdcd4..0000000
--- a/src/include/ryu/f2s.h
+++ /dev/null
@@ -1,55 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Copyright (c) Microsoft Corporation.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-// Copyright 2018 Ulf Adams
-// Copyright (c) Microsoft Corporation. All rights reserved.
-
-// Boost Software License - Version 1.0 - August 17th, 2003
-
-// Permission is hereby granted, free of charge, to any person or organization
-// obtaining a copy of the software and accompanying documentation covered by
-// this license (the "Software") to use, reproduce, display, distribute,
-// execute, and transmit the Software, and to prepare derivative works of the
-// Software, and to permit third-parties to whom the Software is furnished to
-// do so, all subject to the following:
-
-// The copyright notices in the Software and this entire statement, including
-// the above license grant, this restriction and the following disclaimer,
-// must be included in all copies of the Software, in whole or in part, and
-// all derivative works of the Software, unless such copies or derivative
-// works are solely in the form of machine-executable object code generated by
-// a source language processor.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-#ifndef _LIBCPP_SRC_INCLUDE_RYU_FS2_H
-#define _LIBCPP_SRC_INCLUDE_RYU_FS2_H
-
-// Avoid formatting to keep the changes with the original code minimal.
-// clang-format off
-
-#include "__config"
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-[[nodiscard]] to_chars_result __f2s_buffered_n(char* const _First, char* const _Last, const float __f, const chars_format _Fmt);
-
-_LIBCPP_END_NAMESPACE_STD
-
-// clang-format on
-
-#endif // _LIBCPP_SRC_INCLUDE_RYU_FS2_H
diff --git a/src/include/ryu/ryu.h b/src/include/ryu/ryu.h
deleted file mode 100644
index 9c4025f..0000000
--- a/src/include/ryu/ryu.h
+++ /dev/null
@@ -1,148 +0,0 @@
-// -*- 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
-//
-//===----------------------------------------------------------------------===//
-
-// Copyright (c) Microsoft Corporation.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-
-// Copyright 2018 Ulf Adams
-// Copyright (c) Microsoft Corporation. All rights reserved.
-
-// Boost Software License - Version 1.0 - August 17th, 2003
-
-// Permission is hereby granted, free of charge, to any person or organization
-// obtaining a copy of the software and accompanying documentation covered by
-// this license (the "Software") to use, reproduce, display, distribute,
-// execute, and transmit the Software, and to prepare derivative works of the
-// Software, and to permit third-parties to whom the Software is furnished to
-// do so, all subject to the following:
-
-// The copyright notices in the Software and this entire statement, including
-// the above license grant, this restriction and the following disclaimer,
-// must be included in all copies of the Software, in whole or in part, and
-// all derivative works of the Software, unless such copies or derivative
-// works are solely in the form of machine-executable object code generated by
-// a source language processor.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-#ifndef _LIBCPP_SRC_INCLUDE_RYU_RYU_H
-#define _LIBCPP_SRC_INCLUDE_RYU_RYU_H
-
-// Avoid formatting to keep the changes with the original code minimal.
-// clang-format off
-
-#include "__charconv/chars_format.h"
-#include "__charconv/to_chars_result.h"
-#include "__config"
-#include "__debug"
-#include "__errc"
-#include "cstdint"
-#include "cstring"
-#include "type_traits"
-#include "include/ryu/f2s.h"
-#include "include/ryu/d2s.h"
-#include "include/ryu/d2fixed.h"
-
-#if defined(_M_X64) && defined(_LIBCPP_COMPILER_MSVC)
-#include <intrin0.h> // for _umul128() and __shiftright128()
-#endif // defined(_M_X64) && defined(_LIBCPP_COMPILER_MSVC)
-
-#if defined(_WIN64) || defined(_M_AMD64) || defined(__x86_64__) || defined(__aarch64__)
-#define _LIBCPP_64_BIT
-#endif
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-// https://github.com/ulfjack/ryu/tree/59661c3/ryu
-
-#if !defined(_LIBCPP_COMPILER_MSVC)
-_LIBCPP_HIDE_FROM_ABI inline unsigned char _BitScanForward64(unsigned long* __index, unsigned long long __mask) {
- if (__mask == 0) {
- return false;
- }
- *__index = __builtin_ctzll(__mask);
- return true;
-}
-
-_LIBCPP_HIDE_FROM_ABI inline unsigned char _BitScanForward(unsigned long* __index, unsigned int __mask) {
- if (__mask == 0) {
- return false;
- }
- *__index = __builtin_ctz(__mask);
- return true;
-}
-#endif // _LIBCPP_COMPILER_MSVC
-
-template <class _Floating>
-[[nodiscard]] to_chars_result _Floating_to_chars_ryu(
- char* const _First, char* const _Last, const _Floating _Value, const chars_format _Fmt) noexcept {
- if constexpr (_IsSame<_Floating, float>::value) {
- return __f2s_buffered_n(_First, _Last, _Value, _Fmt);
- } else {
- return __d2s_buffered_n(_First, _Last, _Value, _Fmt);
- }
-}
-
-template <class _Floating>
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI to_chars_result _Floating_to_chars_scientific_precision(
- char* const _First, char* const _Last, const _Floating _Value, int _Precision) noexcept {
-
- // C11 7.21.6.1 "The fprintf function"/5:
- // "A negative precision argument is taken as if the precision were omitted."
- // /8: "e,E [...] if the precision is missing, it is taken as 6"
-
- if (_Precision < 0) {
- _Precision = 6;
- } else if (_Precision < 1'000'000'000) { // Match ' to fix compilation with GCC in C++11 mode
- // _Precision is ok.
- } else {
- // Avoid integer overflow.
- // (This defensive check is slightly nonconformant; it can be carefully improved in the future.)
- return {_Last, errc::value_too_large};
- }
-
- return __d2exp_buffered_n(_First, _Last, _Value, static_cast<uint32_t>(_Precision));
-}
-
-template <class _Floating>
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI to_chars_result _Floating_to_chars_fixed_precision(
- char* const _First, char* const _Last, const _Floating _Value, int _Precision) noexcept {
-
- // C11 7.21.6.1 "The fprintf function"/5:
- // "A negative precision argument is taken as if the precision were omitted."
- // /8: "f,F [...] If the precision is missing, it is taken as 6"
-
- if (_Precision < 0) {
- _Precision = 6;
- } else if (_Precision < 1'000'000'000) { // Match ' to fix compilation with GCC in C++11 mode
- // _Precision is ok.
- } else {
- // Avoid integer overflow.
- // (This defensive check is slightly nonconformant; it can be carefully improved in the future.)
- return {_Last, errc::value_too_large};
- }
-
- return __d2fixed_buffered_n(_First, _Last, _Value, static_cast<uint32_t>(_Precision));
-}
-
-#undef _LIBCPP_64_BIT
-#undef _LIBCPP_INTRINSIC128
-
-_LIBCPP_END_NAMESPACE_STD
-
-// clang-format on
-
-#endif // _LIBCPP_SRC_INCLUDE_RYU_RYU_H
diff --git a/src/include/to_chars_floating_point.h b/src/include/to_chars_floating_point.h
deleted file mode 100644
index 081d671..0000000
--- a/src/include/to_chars_floating_point.h
+++ /dev/null
@@ -1,1076 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Copyright (c) Microsoft Corporation.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-// This implementation is dedicated to the memory of Mary and Thavatchai.
-
-#ifndef _LIBCPP_SRC_INCLUDE_TO_CHARS_FLOATING_POINT_H
-#define _LIBCPP_SRC_INCLUDE_TO_CHARS_FLOATING_POINT_H
-
-// Avoid formatting to keep the changes with the original code minimal.
-// clang-format off
-
-#include "__algorithm/find.h"
-#include "__algorithm/find_if.h"
-#include "__algorithm/lower_bound.h"
-#include "__algorithm/min.h"
-#include "__config"
-#include "__iterator/access.h"
-#include "__iterator/size.h"
-#include "bit"
-#include "cfloat"
-#include "climits"
-#include "include/ryu/ryu.h"
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-namespace __itoa {
-inline constexpr char _Charconv_digits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e',
- 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'};
-static_assert(_VSTD::size(_Charconv_digits) == 36);
-} // __itoa
-
-// vvvvvvvvvv DERIVED FROM corecrt_internal_fltintrn.h vvvvvvvvvv
-
-template <class _FloatingType>
-struct _Floating_type_traits;
-
-template <>
-struct _Floating_type_traits<float> {
- static constexpr int32_t _Mantissa_bits = FLT_MANT_DIG;
- static constexpr int32_t _Exponent_bits = sizeof(float) * CHAR_BIT - FLT_MANT_DIG;
-
- static constexpr int32_t _Maximum_binary_exponent = FLT_MAX_EXP - 1;
- static constexpr int32_t _Minimum_binary_exponent = FLT_MIN_EXP - 1;
-
- static constexpr int32_t _Exponent_bias = 127;
-
- static constexpr int32_t _Sign_shift = _Exponent_bits + _Mantissa_bits - 1;
- static constexpr int32_t _Exponent_shift = _Mantissa_bits - 1;
-
- using _Uint_type = uint32_t;
-
- static constexpr uint32_t _Exponent_mask = (1u << _Exponent_bits) - 1;
- static constexpr uint32_t _Normal_mantissa_mask = (1u << _Mantissa_bits) - 1;
- static constexpr uint32_t _Denormal_mantissa_mask = (1u << (_Mantissa_bits - 1)) - 1;
- static constexpr uint32_t _Special_nan_mantissa_mask = 1u << (_Mantissa_bits - 2);
- static constexpr uint32_t _Shifted_sign_mask = 1u << _Sign_shift;
- static constexpr uint32_t _Shifted_exponent_mask = _Exponent_mask << _Exponent_shift;
-};
-
-template <>
-struct _Floating_type_traits<double> {
- static constexpr int32_t _Mantissa_bits = DBL_MANT_DIG;
- static constexpr int32_t _Exponent_bits = sizeof(double) * CHAR_BIT - DBL_MANT_DIG;
-
- static constexpr int32_t _Maximum_binary_exponent = DBL_MAX_EXP - 1;
- static constexpr int32_t _Minimum_binary_exponent = DBL_MIN_EXP - 1;
-
- static constexpr int32_t _Exponent_bias = 1023;
-
- static constexpr int32_t _Sign_shift = _Exponent_bits + _Mantissa_bits - 1;
- static constexpr int32_t _Exponent_shift = _Mantissa_bits - 1;
-
- using _Uint_type = uint64_t;
-
- static constexpr uint64_t _Exponent_mask = (1ULL << _Exponent_bits) - 1;
- static constexpr uint64_t _Normal_mantissa_mask = (1ULL << _Mantissa_bits) - 1;
- static constexpr uint64_t _Denormal_mantissa_mask = (1ULL << (_Mantissa_bits - 1)) - 1;
- static constexpr uint64_t _Special_nan_mantissa_mask = 1ULL << (_Mantissa_bits - 2);
- static constexpr uint64_t _Shifted_sign_mask = 1ULL << _Sign_shift;
- static constexpr uint64_t _Shifted_exponent_mask = _Exponent_mask << _Exponent_shift;
-};
-
-// ^^^^^^^^^^ DERIVED FROM corecrt_internal_fltintrn.h ^^^^^^^^^^
-
-// FUNCTION to_chars (FLOATING-POINT TO STRING)
-template <class _Floating>
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI
-to_chars_result _Floating_to_chars_hex_precision(
- char* _First, char* const _Last, const _Floating _Value, int _Precision) noexcept {
-
- // * Determine the effective _Precision.
- // * Later, we'll decrement _Precision when printing each hexit after the decimal point.
-
- // The hexits after the decimal point correspond to the explicitly stored fraction bits.
- // float explicitly stores 23 fraction bits. 23 / 4 == 5.75, which is 6 hexits.
- // double explicitly stores 52 fraction bits. 52 / 4 == 13, which is 13 hexits.
- constexpr int _Full_precision = _IsSame<_Floating, float>::value ? 6 : 13;
- constexpr int _Adjusted_explicit_bits = _Full_precision * 4;
-
- if (_Precision < 0) {
- // C11 7.21.6.1 "The fprintf function"/5: "A negative precision argument is taken as if the precision were
- // omitted." /8: "if the precision is missing and FLT_RADIX is a power of 2, then the precision is sufficient
- // for an exact representation of the value"
- _Precision = _Full_precision;
- }
-
- // * Extract the _Ieee_mantissa and _Ieee_exponent.
- using _Traits = _Floating_type_traits<_Floating>;
- using _Uint_type = typename _Traits::_Uint_type;
-
- const _Uint_type _Uint_value = _VSTD::bit_cast<_Uint_type>(_Value);
- const _Uint_type _Ieee_mantissa = _Uint_value & _Traits::_Denormal_mantissa_mask;
- const int32_t _Ieee_exponent = static_cast<int32_t>(_Uint_value >> _Traits::_Exponent_shift);
-
- // * Prepare the _Adjusted_mantissa. This is aligned to hexit boundaries,
- // * with the implicit bit restored (0 for zero values and subnormal values, 1 for normal values).
- // * Also calculate the _Unbiased_exponent. This unifies the processing of zero, subnormal, and normal values.
- _Uint_type _Adjusted_mantissa;
-
- if constexpr (_IsSame<_Floating, float>::value) {
- _Adjusted_mantissa = _Ieee_mantissa << 1; // align to hexit boundary (23 isn't divisible by 4)
- } else {
- _Adjusted_mantissa = _Ieee_mantissa; // already aligned (52 is divisible by 4)
- }
-
- int32_t _Unbiased_exponent;
-
- if (_Ieee_exponent == 0) { // zero or subnormal
- // implicit bit is 0
-
- if (_Ieee_mantissa == 0) { // zero
- // C11 7.21.6.1 "The fprintf function"/8: "If the value is zero, the exponent is zero."
- _Unbiased_exponent = 0;
- } else { // subnormal
- _Unbiased_exponent = 1 - _Traits::_Exponent_bias;
- }
- } else { // normal
- _Adjusted_mantissa |= _Uint_type{1} << _Adjusted_explicit_bits; // implicit bit is 1
- _Unbiased_exponent = _Ieee_exponent - _Traits::_Exponent_bias;
- }
-
- // _Unbiased_exponent is within [-126, 127] for float, [-1022, 1023] for double.
-
- // * Decompose _Unbiased_exponent into _Sign_character and _Absolute_exponent.
- char _Sign_character;
- uint32_t _Absolute_exponent;
-
- if (_Unbiased_exponent < 0) {
- _Sign_character = '-';
- _Absolute_exponent = static_cast<uint32_t>(-_Unbiased_exponent);
- } else {
- _Sign_character = '+';
- _Absolute_exponent = static_cast<uint32_t>(_Unbiased_exponent);
- }
-
- // _Absolute_exponent is within [0, 127] for float, [0, 1023] for double.
-
- // * Perform a single bounds check.
- {
- int32_t _Exponent_length;
-
- if (_Absolute_exponent < 10) {
- _Exponent_length = 1;
- } else if (_Absolute_exponent < 100) {
- _Exponent_length = 2;
- } else if constexpr (_IsSame<_Floating, float>::value) {
- _Exponent_length = 3;
- } else if (_Absolute_exponent < 1000) {
- _Exponent_length = 3;
- } else {
- _Exponent_length = 4;
- }
-
- // _Precision might be enormous; avoid integer overflow by testing it separately.
- ptrdiff_t _Buffer_size = _Last - _First;
-
- if (_Buffer_size < _Precision) {
- return {_Last, errc::value_too_large};
- }
-
- _Buffer_size -= _Precision;
-
- const int32_t _Length_excluding_precision = 1 // leading hexit
- + static_cast<int32_t>(_Precision > 0) // possible decimal point
- // excluding `+ _Precision`, hexits after decimal point
- + 2 // "p+" or "p-"
- + _Exponent_length; // exponent
-
- if (_Buffer_size < _Length_excluding_precision) {
- return {_Last, errc::value_too_large};
- }
- }
-
- // * Perform rounding when we've been asked to omit hexits.
- if (_Precision < _Full_precision) {
- // _Precision is within [0, 5] for float, [0, 12] for double.
-
- // _Dropped_bits is within [4, 24] for float, [4, 52] for double.
- const int _Dropped_bits = (_Full_precision - _Precision) * 4;
-
- // Perform rounding by adding an appropriately-shifted bit.
-
- // This can propagate carries all the way into the leading hexit. Examples:
- // "0.ff9" rounded to a precision of 2 is "1.00".
- // "1.ff9" rounded to a precision of 2 is "2.00".
-
- // Note that the leading hexit participates in the rounding decision. Examples:
- // "0.8" rounded to a precision of 0 is "0".
- // "1.8" rounded to a precision of 0 is "2".
-
- // Reference implementation with suboptimal codegen:
- // bool _Should_round_up(bool _Lsb_bit, bool _Round_bit, bool _Has_tail_bits) {
- // // If there are no insignificant set bits, the value is exactly-representable and should not be rounded.
- // //
- // // If there are insignificant set bits, we need to round according to round_to_nearest.
- // // We need to handle two cases: we round up if either [1] the value is slightly greater
- // // than the midpoint between two exactly-representable values or [2] the value is exactly the midpoint
- // // between two exactly-representable values and the greater of the two is even (this is "round-to-even").
- // return _Round_bit && (_Has_tail_bits || _Lsb_bit);
- //}
- // const bool _Lsb_bit = (_Adjusted_mantissa & (_Uint_type{1} << _Dropped_bits)) != 0;
- // const bool _Round_bit = (_Adjusted_mantissa & (_Uint_type{1} << (_Dropped_bits - 1))) != 0;
- // const bool _Has_tail_bits = (_Adjusted_mantissa & ((_Uint_type{1} << (_Dropped_bits - 1)) - 1)) != 0;
- // const bool _Should_round = _Should_round_up(_Lsb_bit, _Round_bit, _Has_tail_bits);
- // _Adjusted_mantissa += _Uint_type{_Should_round} << _Dropped_bits;
-
- // Example for optimized implementation: Let _Dropped_bits be 8.
- // Bit index: ...[8]76543210
- // _Adjusted_mantissa: ...[L]RTTTTTTT (not depicting known details, like hexit alignment)
- // By focusing on the bit at index _Dropped_bits, we can avoid unnecessary branching and shifting.
-
- // Bit index: ...[8]76543210
- // _Lsb_bit: ...[L]RTTTTTTT
- const _Uint_type _Lsb_bit = _Adjusted_mantissa;
-
- // Bit index: ...9[8]76543210
- // _Round_bit: ...L[R]TTTTTTT0
- const _Uint_type _Round_bit = _Adjusted_mantissa << 1;
-
- // We can detect (without branching) whether any of the trailing bits are set.
- // Due to _Should_round below, this computation will be used if and only if R is 1, so we can assume that here.
- // Bit index: ...9[8]76543210
- // _Round_bit: ...L[1]TTTTTTT0
- // _Has_tail_bits: ....[H]........
-
- // If all of the trailing bits T are 0, then `_Round_bit - 1` will produce 0 for H (due to R being 1).
- // If any of the trailing bits T are 1, then `_Round_bit - 1` will produce 1 for H (due to R being 1).
- const _Uint_type _Has_tail_bits = _Round_bit - 1;
-
- // Finally, we can use _Should_round_up() logic with bitwise-AND and bitwise-OR,
- // selecting just the bit at index _Dropped_bits. This is the appropriately-shifted bit that we want.
- const _Uint_type _Should_round = _Round_bit & (_Has_tail_bits | _Lsb_bit) & (_Uint_type{1} << _Dropped_bits);
-
- // This rounding technique is dedicated to the memory of Peppermint. =^..^=
- _Adjusted_mantissa += _Should_round;
- }
-
- // * Print the leading hexit, then mask it away.
- {
- const uint32_t _Nibble = static_cast<uint32_t>(_Adjusted_mantissa >> _Adjusted_explicit_bits);
- _LIBCPP_ASSERT(_Nibble < 3, "");
- const char _Leading_hexit = static_cast<char>('0' + _Nibble);
-
- *_First++ = _Leading_hexit;
-
- constexpr _Uint_type _Mask = (_Uint_type{1} << _Adjusted_explicit_bits) - 1;
- _Adjusted_mantissa &= _Mask;
- }
-
- // * Print the decimal point and trailing hexits.
-
- // C11 7.21.6.1 "The fprintf function"/8:
- // "if the precision is zero and the # flag is not specified, no decimal-point character appears."
- if (_Precision > 0) {
- *_First++ = '.';
-
- int32_t _Number_of_bits_remaining = _Adjusted_explicit_bits; // 24 for float, 52 for double
-
- for (;;) {
- _LIBCPP_ASSERT(_Number_of_bits_remaining >= 4, "");
- _LIBCPP_ASSERT(_Number_of_bits_remaining % 4 == 0, "");
- _Number_of_bits_remaining -= 4;
-
- const uint32_t _Nibble = static_cast<uint32_t>(_Adjusted_mantissa >> _Number_of_bits_remaining);
- _LIBCPP_ASSERT(_Nibble < 16, "");
- const char _Hexit = __itoa::_Charconv_digits[_Nibble];
-
- *_First++ = _Hexit;
-
- // _Precision is the number of hexits that still need to be printed.
- --_Precision;
- if (_Precision == 0) {
- break; // We're completely done with this phase.
- }
- // Otherwise, we need to keep printing hexits.
-
- if (_Number_of_bits_remaining == 0) {
- // We've finished printing _Adjusted_mantissa, so all remaining hexits are '0'.
- _VSTD::memset(_First, '0', static_cast<size_t>(_Precision));
- _First += _Precision;
- break;
- }
-
- // Mask away the hexit that we just printed, then keep looping.
- // (We skip this when breaking out of the loop above, because _Adjusted_mantissa isn't used later.)
- const _Uint_type _Mask = (_Uint_type{1} << _Number_of_bits_remaining) - 1;
- _Adjusted_mantissa &= _Mask;
- }
- }
-
- // * Print the exponent.
-
- // C11 7.21.6.1 "The fprintf function"/8: "The exponent always contains at least one digit, and only as many more
- // digits as necessary to represent the decimal exponent of 2."
-
- // Performance note: We should take advantage of the known ranges of possible exponents.
-
- *_First++ = 'p';
- *_First++ = _Sign_character;
-
- // We've already printed '-' if necessary, so uint32_t _Absolute_exponent avoids testing that again.
- return _VSTD::to_chars(_First, _Last, _Absolute_exponent);
-}
-
-template <class _Floating>
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI
-to_chars_result _Floating_to_chars_hex_shortest(
- char* _First, char* const _Last, const _Floating _Value) noexcept {
-
- // This prints "1.728p+0" instead of "2.e5p-1".
- // This prints "0.000002p-126" instead of "1p-149" for float.
- // This prints "0.0000000000001p-1022" instead of "1p-1074" for double.
- // This prioritizes being consistent with printf's de facto behavior (and hex-precision's behavior)
- // over minimizing the number of characters printed.
-
- using _Traits = _Floating_type_traits<_Floating>;
- using _Uint_type = typename _Traits::_Uint_type;
-
- const _Uint_type _Uint_value = _VSTD::bit_cast<_Uint_type>(_Value);
-
- if (_Uint_value == 0) { // zero detected; write "0p+0" and return
- // C11 7.21.6.1 "The fprintf function"/8: "If the value is zero, the exponent is zero."
- // Special-casing zero is necessary because of the exponent.
- const char* const _Str = "0p+0";
- const size_t _Len = 4;
-
- if (_Last - _First < static_cast<ptrdiff_t>(_Len)) {
- return {_Last, errc::value_too_large};
- }
-
- _VSTD::memcpy(_First, _Str, _Len);
-
- return {_First + _Len, errc{}};
- }
-
- const _Uint_type _Ieee_mantissa = _Uint_value & _Traits::_Denormal_mantissa_mask;
- const int32_t _Ieee_exponent = static_cast<int32_t>(_Uint_value >> _Traits::_Exponent_shift);
-
- char _Leading_hexit; // implicit bit
- int32_t _Unbiased_exponent;
-
- if (_Ieee_exponent == 0) { // subnormal
- _Leading_hexit = '0';
- _Unbiased_exponent = 1 - _Traits::_Exponent_bias;
- } else { // normal
- _Leading_hexit = '1';
- _Unbiased_exponent = _Ieee_exponent - _Traits::_Exponent_bias;
- }
-
- // Performance note: Consider avoiding per-character bounds checking when there's plenty of space.
-
- if (_First == _Last) {
- return {_Last, errc::value_too_large};
- }
-
- *_First++ = _Leading_hexit;
-
- if (_Ieee_mantissa == 0) {
- // The fraction bits are all 0. Trim them away, including the decimal point.
- } else {
- if (_First == _Last) {
- return {_Last, errc::value_too_large};
- }
-
- *_First++ = '.';
-
- // The hexits after the decimal point correspond to the explicitly stored fraction bits.
- // float explicitly stores 23 fraction bits. 23 / 4 == 5.75, so we'll print at most 6 hexits.
- // double explicitly stores 52 fraction bits. 52 / 4 == 13, so we'll print at most 13 hexits.
- _Uint_type _Adjusted_mantissa;
- int32_t _Number_of_bits_remaining;
-
- if constexpr (_IsSame<_Floating, float>::value) {
- _Adjusted_mantissa = _Ieee_mantissa << 1; // align to hexit boundary (23 isn't divisible by 4)
- _Number_of_bits_remaining = 24; // 23 fraction bits + 1 alignment bit
- } else {
- _Adjusted_mantissa = _Ieee_mantissa; // already aligned (52 is divisible by 4)
- _Number_of_bits_remaining = 52; // 52 fraction bits
- }
-
- // do-while: The condition _Adjusted_mantissa != 0 is initially true - we have nonzero fraction bits and we've
- // printed the decimal point. Each iteration, we print a hexit, mask it away, and keep looping if we still have
- // nonzero fraction bits. If there would be trailing '0' hexits, this trims them. If there wouldn't be trailing
- // '0' hexits, the same condition works (as we print the final hexit and mask it away); we don't need to test
- // _Number_of_bits_remaining.
- do {
- _LIBCPP_ASSERT(_Number_of_bits_remaining >= 4, "");
- _LIBCPP_ASSERT(_Number_of_bits_remaining % 4 == 0, "");
- _Number_of_bits_remaining -= 4;
-
- const uint32_t _Nibble = static_cast<uint32_t>(_Adjusted_mantissa >> _Number_of_bits_remaining);
- _LIBCPP_ASSERT(_Nibble < 16, "");
- const char _Hexit = __itoa::_Charconv_digits[_Nibble];
-
- if (_First == _Last) {
- return {_Last, errc::value_too_large};
- }
-
- *_First++ = _Hexit;
-
- const _Uint_type _Mask = (_Uint_type{1} << _Number_of_bits_remaining) - 1;
- _Adjusted_mantissa &= _Mask;
-
- } while (_Adjusted_mantissa != 0);
- }
-
- // C11 7.21.6.1 "The fprintf function"/8: "The exponent always contains at least one digit, and only as many more
- // digits as necessary to represent the decimal exponent of 2."
-
- // Performance note: We should take advantage of the known ranges of possible exponents.
-
- // float: _Unbiased_exponent is within [-126, 127].
- // double: _Unbiased_exponent is within [-1022, 1023].
-
- if (_Last - _First < 2) {
- return {_Last, errc::value_too_large};
- }
-
- *_First++ = 'p';
-
- if (_Unbiased_exponent < 0) {
- *_First++ = '-';
- _Unbiased_exponent = -_Unbiased_exponent;
- } else {
- *_First++ = '+';
- }
-
- // We've already printed '-' if necessary, so static_cast<uint32_t> avoids testing that again.
- return _VSTD::to_chars(_First, _Last, static_cast<uint32_t>(_Unbiased_exponent));
-}
-
-// For general precision, we can use lookup tables to avoid performing trial formatting.
-
-// For a simple example, imagine counting the number of digits D in an integer, and needing to know
-// whether D is less than 3, equal to 3/4/5/6, or greater than 6. We could use a lookup table:
-// D | Largest integer with D digits
-// 2 | 99
-// 3 | 999
-// 4 | 9'999
-// 5 | 99'999
-// 6 | 999'999
-// 7 | table end
-// Looking up an integer in this table with lower_bound() will work:
-// * Too-small integers, like 7, 70, and 99, will cause lower_bound() to return the D == 2 row. (If all we care
-// about is whether D is less than 3, then it's okay to smash the D == 1 and D == 2 cases together.)
-// * Integers in [100, 999] will cause lower_bound() to return the D == 3 row, and so forth.
-// * Too-large integers, like 1'000'000 and above, will cause lower_bound() to return the end of the table. If we
-// compute D from that index, this will be considered D == 7, which will activate any "greater than 6" logic.
-
-// Floating-point is slightly more complicated.
-
-// The ordinary lookup tables are for X within [-5, 38] for float, and [-5, 308] for double.
-// (-5 absorbs too-negative exponents, outside the P > X >= -4 criterion. 38 and 308 are the maximum exponents.)
-// Due to the P > X condition, we can use a subset of the table for X within [-5, P - 1], suitably clamped.
-
-// When P is small, rounding can affect X. For example:
-// For P == 1, the largest double with X == 0 is: 9.4999999999999982236431605997495353221893310546875
-// For P == 2, the largest double with X == 0 is: 9.949999999999999289457264239899814128875732421875
-// For P == 3, the largest double with X == 0 is: 9.9949999999999992184029906638897955417633056640625
-
-// Exponent adjustment is a concern for P within [1, 7] for float, and [1, 15] for double (determined via
-// brute force). While larger values of P still perform rounding, they can't trigger exponent adjustment.
-// This is because only values with repeated '9' digits can undergo exponent adjustment during rounding,
-// and floating-point granularity limits the number of consecutive '9' digits that can appear.
-
-// So, we need special lookup tables for small values of P.
-// These tables have varying lengths due to the P > X >= -4 criterion. For example:
-// For P == 1, need table entries for X: -5, -4, -3, -2, -1, 0
-// For P == 2, need table entries for X: -5, -4, -3, -2, -1, 0, 1
-// For P == 3, need table entries for X: -5, -4, -3, -2, -1, 0, 1, 2
-// For P == 4, need table entries for X: -5, -4, -3, -2, -1, 0, 1, 2, 3
-
-// We can concatenate these tables for compact storage, using triangular numbers to access them.
-// The table for P begins at index (P - 1) * (P + 10) / 2 with length P + 5.
-
-// For both the ordinary and special lookup tables, after an index I is returned by lower_bound(), X is I - 5.
-
-// We need to special-case the floating-point value 0.0, which is considered to have X == 0.
-// Otherwise, the lookup tables would consider it to have a highly negative X.
-
-// Finally, because we're working with positive floating-point values,
-// representation comparisons behave identically to floating-point comparisons.
-
-// The following code generated the lookup tables for the scientific exponent X. Don't remove this code.
-#if 0
-// cl /EHsc /nologo /W4 /MT /O2 /std:c++17 generate_tables.cpp && generate_tables
-
-#include <algorithm>
-#include <assert.h>
-#include <charconv>
-#include <cmath>
-#include <limits>
-#include <map>
-#include <stdint.h>
-#include <stdio.h>
-#include <system_error>
-#include <type_traits>
-#include <vector>
-using namespace std;
-
-template <typename UInt, typename Pred>
-[[nodiscard]] UInt uint_partition_point(UInt first, const UInt last, Pred pred) {
- // Find the beginning of the false partition in [first, last).
- // [first, last) is partitioned when all of the true values occur before all of the false values.
-
- static_assert(is_unsigned_v<UInt>);
- assert(first <= last);
-
- for (UInt n = last - first; n > 0;) {
- const UInt n2 = n / 2;
- const UInt mid = first + n2;
-
- if (pred(mid)) {
- first = mid + 1;
- n = n - n2 - 1;
- } else {
- n = n2;
- }
- }
-
- return first;
-}
-
-template <typename Floating>
-[[nodiscard]] int scientific_exponent_X(const int P, const Floating flt) {
- char buf[400]; // more than enough
-
- // C11 7.21.6.1 "The fprintf function"/8 performs trial formatting with scientific precision P - 1.
- const auto to_result = to_chars(buf, end(buf), flt, chars_format::scientific, P - 1);
- assert(to_result.ec == errc{});
-
- const char* exp_ptr = find(buf, to_result.ptr, 'e');
- assert(exp_ptr != to_result.ptr);
-
- ++exp_ptr; // advance past 'e'
-
- if (*exp_ptr == '+') {
- ++exp_ptr; // advance past '+' which from_chars() won't parse
- }
-
- int X;
- const auto from_result = from_chars(exp_ptr, to_result.ptr, X);
- assert(from_result.ec == errc{});
- return X;
-}
-
-template <typename UInt>
-void print_table(const vector<UInt>& v, const char* const name) {
- constexpr const char* UIntName = _IsSame<UInt, uint32_t>::value ? "uint32_t" : "uint64_t";
-
- printf("static constexpr %s %s[%zu] = {\n", UIntName, name, v.size());
-
- for (const auto& val : v) {
- if constexpr (_IsSame<UInt, uint32_t>::value) {
- printf("0x%08Xu,\n", val);
- } else {
- printf("0x%016llXu,\n", val);
- }
- }
-
- printf("};\n");
-}
-
-enum class Mode { Tables, Tests };
-
-template <typename Floating>
-void generate_tables(const Mode mode) {
- using Limits = numeric_limits<Floating>;
- using UInt = conditional_t<_IsSame<Floating, float>::value, uint32_t, uint64_t>;
-
- map<int, map<int, UInt>> P_X_LargestValWithX;
-
- constexpr int MaxP = Limits::max_exponent10 + 1; // MaxP performs no rounding during trial formatting
-
- for (int P = 1; P <= MaxP; ++P) {
- for (int X = -5; X < P; ++X) {
- constexpr Floating first = static_cast<Floating>(9e-5); // well below 9.5e-5, otherwise arbitrary
- constexpr Floating last = Limits::infinity(); // one bit above Limits::max()
-
- const UInt val_beyond_X = uint_partition_point(reinterpret_cast<const UInt&>(first),
- reinterpret_cast<const UInt&>(last),
- [P, X](const UInt u) { return scientific_exponent_X(P, reinterpret_cast<const Floating&>(u)) <= X; });
-
- P_X_LargestValWithX[P][X] = val_beyond_X - 1;
- }
- }
-
- constexpr const char* FloatingName = _IsSame<Floating, float>::value ? "float" : "double";
-
- constexpr int MaxSpecialP = _IsSame<Floating, float>::value ? 7 : 15; // MaxSpecialP is affected by exponent adjustment
-
- if (mode == Mode::Tables) {
- printf("template <>\n");
- printf("struct _General_precision_tables<%s> {\n", FloatingName);
-
- printf("static constexpr int _Max_special_P = %d;\n", MaxSpecialP);
-
- vector<UInt> special;
-
- for (int P = 1; P <= MaxSpecialP; ++P) {
- for (int X = -5; X < P; ++X) {
- const UInt val = P_X_LargestValWithX[P][X];
- special.push_back(val);
- }
- }
-
- print_table(special, "_Special_X_table");
-
- for (int P = MaxSpecialP + 1; P < MaxP; ++P) {
- for (int X = -5; X < P; ++X) {
- const UInt val = P_X_LargestValWithX[P][X];
- assert(val == P_X_LargestValWithX[MaxP][X]);
- }
- }
-
- printf("static constexpr int _Max_P = %d;\n", MaxP);
-
- vector<UInt> ordinary;
-
- for (int X = -5; X < MaxP; ++X) {
- const UInt val = P_X_LargestValWithX[MaxP][X];
- ordinary.push_back(val);
- }
-
- print_table(ordinary, "_Ordinary_X_table");
-
- printf("};\n");
- } else {
- printf("==========\n");
- printf("Test cases for %s:\n", FloatingName);
-
- constexpr int Hexits = _IsSame<Floating, float>::value ? 6 : 13;
- constexpr const char* Suffix = _IsSame<Floating, float>::value ? "f" : "";
-
- for (int P = 1; P <= MaxP; ++P) {
- for (int X = -5; X < P; ++X) {
- if (P <= MaxSpecialP || P == 25 || P == MaxP || X == P - 1) {
- const UInt val1 = P_X_LargestValWithX[P][X];
- const Floating f1 = reinterpret_cast<const Floating&>(val1);
- const UInt val2 = val1 + 1;
- const Floating f2 = reinterpret_cast<const Floating&>(val2);
-
- printf("{%.*a%s, chars_format::general, %d, \"%.*g\"},\n", Hexits, f1, Suffix, P, P, f1);
- if (isfinite(f2)) {
- printf("{%.*a%s, chars_format::general, %d, \"%.*g\"},\n", Hexits, f2, Suffix, P, P, f2);
- }
- }
- }
- }
- }
-}
-
-int main() {
- printf("template <class _Floating>\n");
- printf("struct _General_precision_tables;\n");
- generate_tables<float>(Mode::Tables);
- generate_tables<double>(Mode::Tables);
- generate_tables<float>(Mode::Tests);
- generate_tables<double>(Mode::Tests);
-}
-#endif // 0
-
-template <class _Floating>
-struct _General_precision_tables;
-
-template <>
-struct _General_precision_tables<float> {
- static constexpr int _Max_special_P = 7;
-
- static constexpr uint32_t _Special_X_table[63] = {0x38C73ABCu, 0x3A79096Bu, 0x3C1BA5E3u, 0x3DC28F5Cu, 0x3F733333u,
- 0x4117FFFFu, 0x38D0AAA7u, 0x3A826AA8u, 0x3C230553u, 0x3DCBC6A7u, 0x3F7EB851u, 0x411F3333u, 0x42C6FFFFu,
- 0x38D19C3Fu, 0x3A8301A7u, 0x3C23C211u, 0x3DCCB295u, 0x3F7FDF3Bu, 0x411FEB85u, 0x42C7E666u, 0x4479DFFFu,
- 0x38D1B468u, 0x3A8310C1u, 0x3C23D4F1u, 0x3DCCCA2Du, 0x3F7FFCB9u, 0x411FFDF3u, 0x42C7FD70u, 0x4479FCCCu,
- 0x461C3DFFu, 0x38D1B6D2u, 0x3A831243u, 0x3C23D6D4u, 0x3DCCCC89u, 0x3F7FFFACu, 0x411FFFCBu, 0x42C7FFBEu,
- 0x4479FFAEu, 0x461C3FCCu, 0x47C34FBFu, 0x38D1B710u, 0x3A83126Au, 0x3C23D704u, 0x3DCCCCC6u, 0x3F7FFFF7u,
- 0x411FFFFAu, 0x42C7FFF9u, 0x4479FFF7u, 0x461C3FFAu, 0x47C34FF9u, 0x497423F7u, 0x38D1B716u, 0x3A83126Eu,
- 0x3C23D709u, 0x3DCCCCCCu, 0x3F7FFFFFu, 0x411FFFFFu, 0x42C7FFFFu, 0x4479FFFFu, 0x461C3FFFu, 0x47C34FFFu,
- 0x497423FFu, 0x4B18967Fu};
-
- static constexpr int _Max_P = 39;
-
- static constexpr uint32_t _Ordinary_X_table[44] = {0x38D1B717u, 0x3A83126Eu, 0x3C23D70Au, 0x3DCCCCCCu, 0x3F7FFFFFu,
- 0x411FFFFFu, 0x42C7FFFFu, 0x4479FFFFu, 0x461C3FFFu, 0x47C34FFFu, 0x497423FFu, 0x4B18967Fu, 0x4CBEBC1Fu,
- 0x4E6E6B27u, 0x501502F8u, 0x51BA43B7u, 0x5368D4A5u, 0x551184E7u, 0x56B5E620u, 0x58635FA9u, 0x5A0E1BC9u,
- 0x5BB1A2BCu, 0x5D5E0B6Bu, 0x5F0AC723u, 0x60AD78EBu, 0x6258D726u, 0x64078678u, 0x65A96816u, 0x6753C21Bu,
- 0x69045951u, 0x6AA56FA5u, 0x6C4ECB8Fu, 0x6E013F39u, 0x6FA18F07u, 0x7149F2C9u, 0x72FC6F7Cu, 0x749DC5ADu,
- 0x76453719u, 0x77F684DFu, 0x799A130Bu, 0x7B4097CEu, 0x7CF0BDC2u, 0x7E967699u, 0x7F7FFFFFu};
-};
-
-template <>
-struct _General_precision_tables<double> {
- static constexpr int _Max_special_P = 15;
-
- static constexpr uint64_t _Special_X_table[195] = {0x3F18E757928E0C9Du, 0x3F4F212D77318FC5u, 0x3F8374BC6A7EF9DBu,
- 0x3FB851EB851EB851u, 0x3FEE666666666666u, 0x4022FFFFFFFFFFFFu, 0x3F1A1554FBDAD751u, 0x3F504D551D68C692u,
- 0x3F8460AA64C2F837u, 0x3FB978D4FDF3B645u, 0x3FEFD70A3D70A3D7u, 0x4023E66666666666u, 0x4058DFFFFFFFFFFFu,
- 0x3F1A3387ECC8EB96u, 0x3F506034F3FD933Eu, 0x3F84784230FCF80Du, 0x3FB99652BD3C3611u, 0x3FEFFBE76C8B4395u,
- 0x4023FD70A3D70A3Du, 0x4058FCCCCCCCCCCCu, 0x408F3BFFFFFFFFFFu, 0x3F1A368D04E0BA6Au, 0x3F506218230C7482u,
- 0x3F847A9E2BCF91A3u, 0x3FB99945B6C3760Bu, 0x3FEFFF972474538Eu, 0x4023FFBE76C8B439u, 0x4058FFAE147AE147u,
- 0x408F3F9999999999u, 0x40C387BFFFFFFFFFu, 0x3F1A36DA54164F19u, 0x3F506248748DF16Fu, 0x3F847ADA91B16DCBu,
- 0x3FB99991361DC93Eu, 0x3FEFFFF583A53B8Eu, 0x4023FFF972474538u, 0x4058FFF7CED91687u, 0x408F3FF5C28F5C28u,
- 0x40C387F999999999u, 0x40F869F7FFFFFFFFu, 0x3F1A36E20F35445Du, 0x3F50624D49814ABAu, 0x3F847AE09BE19D69u,
- 0x3FB99998C2DA04C3u, 0x3FEFFFFEF39085F4u, 0x4023FFFF583A53B8u, 0x4058FFFF2E48E8A7u, 0x408F3FFEF9DB22D0u,
- 0x40C387FF5C28F5C2u, 0x40F869FF33333333u, 0x412E847EFFFFFFFFu, 0x3F1A36E2D51EC34Bu, 0x3F50624DC5333A0Eu,
- 0x3F847AE136800892u, 0x3FB9999984200AB7u, 0x3FEFFFFFE5280D65u, 0x4023FFFFEF39085Fu, 0x4058FFFFEB074A77u,
- 0x408F3FFFE5C91D14u, 0x40C387FFEF9DB22Du, 0x40F869FFEB851EB8u, 0x412E847FE6666666u, 0x416312CFEFFFFFFFu,
- 0x3F1A36E2E8E94FFCu, 0x3F50624DD191D1FDu, 0x3F847AE145F6467Du, 0x3FB999999773D81Cu, 0x3FEFFFFFFD50CE23u,
- 0x4023FFFFFE5280D6u, 0x4058FFFFFDE7210Bu, 0x408F3FFFFD60E94Eu, 0x40C387FFFE5C91D1u, 0x40F869FFFDF3B645u,
- 0x412E847FFD70A3D7u, 0x416312CFFE666666u, 0x4197D783FDFFFFFFu, 0x3F1A36E2EAE3F7A7u, 0x3F50624DD2CE7AC8u,
- 0x3F847AE14782197Bu, 0x3FB9999999629FD9u, 0x3FEFFFFFFFBB47D0u, 0x4023FFFFFFD50CE2u, 0x4058FFFFFFCA501Au,
- 0x408F3FFFFFBCE421u, 0x40C387FFFFD60E94u, 0x40F869FFFFCB923Au, 0x412E847FFFBE76C8u, 0x416312CFFFD70A3Du,
- 0x4197D783FFCCCCCCu, 0x41CDCD64FFBFFFFFu, 0x3F1A36E2EB16A205u, 0x3F50624DD2EE2543u, 0x3F847AE147A9AE94u,
- 0x3FB9999999941A39u, 0x3FEFFFFFFFF920C8u, 0x4023FFFFFFFBB47Du, 0x4058FFFFFFFAA19Cu, 0x408F3FFFFFF94A03u,
- 0x40C387FFFFFBCE42u, 0x40F869FFFFFAC1D2u, 0x412E847FFFF97247u, 0x416312CFFFFBE76Cu, 0x4197D783FFFAE147u,
- 0x41CDCD64FFF99999u, 0x4202A05F1FFBFFFFu, 0x3F1A36E2EB1BB30Fu, 0x3F50624DD2F14FE9u, 0x3F847AE147ADA3E3u,
- 0x3FB9999999990CDCu, 0x3FEFFFFFFFFF5014u, 0x4023FFFFFFFF920Cu, 0x4058FFFFFFFF768Fu, 0x408F3FFFFFFF5433u,
- 0x40C387FFFFFF94A0u, 0x40F869FFFFFF79C8u, 0x412E847FFFFF583Au, 0x416312CFFFFF9724u, 0x4197D783FFFF7CEDu,
- 0x41CDCD64FFFF5C28u, 0x4202A05F1FFF9999u, 0x42374876E7FF7FFFu, 0x3F1A36E2EB1C34C3u, 0x3F50624DD2F1A0FAu,
- 0x3F847AE147AE0938u, 0x3FB9999999998B86u, 0x3FEFFFFFFFFFEE68u, 0x4023FFFFFFFFF501u, 0x4058FFFFFFFFF241u,
- 0x408F3FFFFFFFEED1u, 0x40C387FFFFFFF543u, 0x40F869FFFFFFF294u, 0x412E847FFFFFEF39u, 0x416312CFFFFFF583u,
- 0x4197D783FFFFF2E4u, 0x41CDCD64FFFFEF9Du, 0x4202A05F1FFFF5C2u, 0x42374876E7FFF333u, 0x426D1A94A1FFEFFFu,
- 0x3F1A36E2EB1C41BBu, 0x3F50624DD2F1A915u, 0x3F847AE147AE135Au, 0x3FB9999999999831u, 0x3FEFFFFFFFFFFE3Du,
- 0x4023FFFFFFFFFEE6u, 0x4058FFFFFFFFFEA0u, 0x408F3FFFFFFFFE48u, 0x40C387FFFFFFFEEDu, 0x40F869FFFFFFFEA8u,
- 0x412E847FFFFFFE52u, 0x416312CFFFFFFEF3u, 0x4197D783FFFFFEB0u, 0x41CDCD64FFFFFE5Cu, 0x4202A05F1FFFFEF9u,
- 0x42374876E7FFFEB8u, 0x426D1A94A1FFFE66u, 0x42A2309CE53FFEFFu, 0x3F1A36E2EB1C4307u, 0x3F50624DD2F1A9E4u,
- 0x3F847AE147AE145Eu, 0x3FB9999999999975u, 0x3FEFFFFFFFFFFFD2u, 0x4023FFFFFFFFFFE3u, 0x4058FFFFFFFFFFDCu,
- 0x408F3FFFFFFFFFD4u, 0x40C387FFFFFFFFE4u, 0x40F869FFFFFFFFDDu, 0x412E847FFFFFFFD5u, 0x416312CFFFFFFFE5u,
- 0x4197D783FFFFFFDEu, 0x41CDCD64FFFFFFD6u, 0x4202A05F1FFFFFE5u, 0x42374876E7FFFFDFu, 0x426D1A94A1FFFFD7u,
- 0x42A2309CE53FFFE6u, 0x42D6BCC41E8FFFDFu, 0x3F1A36E2EB1C4328u, 0x3F50624DD2F1A9F9u, 0x3F847AE147AE1477u,
- 0x3FB9999999999995u, 0x3FEFFFFFFFFFFFFBu, 0x4023FFFFFFFFFFFDu, 0x4058FFFFFFFFFFFCu, 0x408F3FFFFFFFFFFBu,
- 0x40C387FFFFFFFFFDu, 0x40F869FFFFFFFFFCu, 0x412E847FFFFFFFFBu, 0x416312CFFFFFFFFDu, 0x4197D783FFFFFFFCu,
- 0x41CDCD64FFFFFFFBu, 0x4202A05F1FFFFFFDu, 0x42374876E7FFFFFCu, 0x426D1A94A1FFFFFBu, 0x42A2309CE53FFFFDu,
- 0x42D6BCC41E8FFFFCu, 0x430C6BF52633FFFBu};
-
- static constexpr int _Max_P = 309;
-
- static constexpr uint64_t _Ordinary_X_table[314] = {0x3F1A36E2EB1C432Cu, 0x3F50624DD2F1A9FBu, 0x3F847AE147AE147Au,
- 0x3FB9999999999999u, 0x3FEFFFFFFFFFFFFFu, 0x4023FFFFFFFFFFFFu, 0x4058FFFFFFFFFFFFu, 0x408F3FFFFFFFFFFFu,
- 0x40C387FFFFFFFFFFu, 0x40F869FFFFFFFFFFu, 0x412E847FFFFFFFFFu, 0x416312CFFFFFFFFFu, 0x4197D783FFFFFFFFu,
- 0x41CDCD64FFFFFFFFu, 0x4202A05F1FFFFFFFu, 0x42374876E7FFFFFFu, 0x426D1A94A1FFFFFFu, 0x42A2309CE53FFFFFu,
- 0x42D6BCC41E8FFFFFu, 0x430C6BF52633FFFFu, 0x4341C37937E07FFFu, 0x4376345785D89FFFu, 0x43ABC16D674EC7FFu,
- 0x43E158E460913CFFu, 0x4415AF1D78B58C3Fu, 0x444B1AE4D6E2EF4Fu, 0x4480F0CF064DD591u, 0x44B52D02C7E14AF6u,
- 0x44EA784379D99DB4u, 0x45208B2A2C280290u, 0x4554ADF4B7320334u, 0x4589D971E4FE8401u, 0x45C027E72F1F1281u,
- 0x45F431E0FAE6D721u, 0x46293E5939A08CE9u, 0x465F8DEF8808B024u, 0x4693B8B5B5056E16u, 0x46C8A6E32246C99Cu,
- 0x46FED09BEAD87C03u, 0x4733426172C74D82u, 0x476812F9CF7920E2u, 0x479E17B84357691Bu, 0x47D2CED32A16A1B1u,
- 0x48078287F49C4A1Du, 0x483D6329F1C35CA4u, 0x48725DFA371A19E6u, 0x48A6F578C4E0A060u, 0x48DCB2D6F618C878u,
- 0x4911EFC659CF7D4Bu, 0x49466BB7F0435C9Eu, 0x497C06A5EC5433C6u, 0x49B18427B3B4A05Bu, 0x49E5E531A0A1C872u,
- 0x4A1B5E7E08CA3A8Fu, 0x4A511B0EC57E6499u, 0x4A8561D276DDFDC0u, 0x4ABABA4714957D30u, 0x4AF0B46C6CDD6E3Eu,
- 0x4B24E1878814C9CDu, 0x4B5A19E96A19FC40u, 0x4B905031E2503DA8u, 0x4BC4643E5AE44D12u, 0x4BF97D4DF19D6057u,
- 0x4C2FDCA16E04B86Du, 0x4C63E9E4E4C2F344u, 0x4C98E45E1DF3B015u, 0x4CCF1D75A5709C1Au, 0x4D03726987666190u,
- 0x4D384F03E93FF9F4u, 0x4D6E62C4E38FF872u, 0x4DA2FDBB0E39FB47u, 0x4DD7BD29D1C87A19u, 0x4E0DAC74463A989Fu,
- 0x4E428BC8ABE49F63u, 0x4E772EBAD6DDC73Cu, 0x4EACFA698C95390Bu, 0x4EE21C81F7DD43A7u, 0x4F16A3A275D49491u,
- 0x4F4C4C8B1349B9B5u, 0x4F81AFD6EC0E1411u, 0x4FB61BCCA7119915u, 0x4FEBA2BFD0D5FF5Bu, 0x502145B7E285BF98u,
- 0x50559725DB272F7Fu, 0x508AFCEF51F0FB5Eu, 0x50C0DE1593369D1Bu, 0x50F5159AF8044462u, 0x512A5B01B605557Au,
- 0x516078E111C3556Cu, 0x5194971956342AC7u, 0x51C9BCDFABC13579u, 0x5200160BCB58C16Cu, 0x52341B8EBE2EF1C7u,
- 0x526922726DBAAE39u, 0x529F6B0F092959C7u, 0x52D3A2E965B9D81Cu, 0x53088BA3BF284E23u, 0x533EAE8CAEF261ACu,
- 0x53732D17ED577D0Bu, 0x53A7F85DE8AD5C4Eu, 0x53DDF67562D8B362u, 0x5412BA095DC7701Du, 0x5447688BB5394C25u,
- 0x547D42AEA2879F2Eu, 0x54B249AD2594C37Cu, 0x54E6DC186EF9F45Cu, 0x551C931E8AB87173u, 0x5551DBF316B346E7u,
- 0x558652EFDC6018A1u, 0x55BBE7ABD3781ECAu, 0x55F170CB642B133Eu, 0x5625CCFE3D35D80Eu, 0x565B403DCC834E11u,
- 0x569108269FD210CBu, 0x56C54A3047C694FDu, 0x56FA9CBC59B83A3Du, 0x5730A1F5B8132466u, 0x5764CA732617ED7Fu,
- 0x5799FD0FEF9DE8DFu, 0x57D03E29F5C2B18Bu, 0x58044DB473335DEEu, 0x583961219000356Au, 0x586FB969F40042C5u,
- 0x58A3D3E2388029BBu, 0x58D8C8DAC6A0342Au, 0x590EFB1178484134u, 0x59435CEAEB2D28C0u, 0x59783425A5F872F1u,
- 0x59AE412F0F768FADu, 0x59E2E8BD69AA19CCu, 0x5A17A2ECC414A03Fu, 0x5A4D8BA7F519C84Fu, 0x5A827748F9301D31u,
- 0x5AB7151B377C247Eu, 0x5AECDA62055B2D9Du, 0x5B22087D4358FC82u, 0x5B568A9C942F3BA3u, 0x5B8C2D43B93B0A8Bu,
- 0x5BC19C4A53C4E697u, 0x5BF6035CE8B6203Du, 0x5C2B843422E3A84Cu, 0x5C6132A095CE492Fu, 0x5C957F48BB41DB7Bu,
- 0x5CCADF1AEA12525Au, 0x5D00CB70D24B7378u, 0x5D34FE4D06DE5056u, 0x5D6A3DE04895E46Cu, 0x5DA066AC2D5DAEC3u,
- 0x5DD4805738B51A74u, 0x5E09A06D06E26112u, 0x5E400444244D7CABu, 0x5E7405552D60DBD6u, 0x5EA906AA78B912CBu,
- 0x5EDF485516E7577Eu, 0x5F138D352E5096AFu, 0x5F48708279E4BC5Au, 0x5F7E8CA3185DEB71u, 0x5FB317E5EF3AB327u,
- 0x5FE7DDDF6B095FF0u, 0x601DD55745CBB7ECu, 0x6052A5568B9F52F4u, 0x60874EAC2E8727B1u, 0x60BD22573A28F19Du,
- 0x60F2357684599702u, 0x6126C2D4256FFCC2u, 0x615C73892ECBFBF3u, 0x6191C835BD3F7D78u, 0x61C63A432C8F5CD6u,
- 0x61FBC8D3F7B3340Bu, 0x62315D847AD00087u, 0x6265B4E5998400A9u, 0x629B221EFFE500D3u, 0x62D0F5535FEF2084u,
- 0x630532A837EAE8A5u, 0x633A7F5245E5A2CEu, 0x63708F936BAF85C1u, 0x63A4B378469B6731u, 0x63D9E056584240FDu,
- 0x64102C35F729689Eu, 0x6444374374F3C2C6u, 0x647945145230B377u, 0x64AF965966BCE055u, 0x64E3BDF7E0360C35u,
- 0x6518AD75D8438F43u, 0x654ED8D34E547313u, 0x6583478410F4C7ECu, 0x65B819651531F9E7u, 0x65EE1FBE5A7E7861u,
- 0x6622D3D6F88F0B3Cu, 0x665788CCB6B2CE0Cu, 0x668D6AFFE45F818Fu, 0x66C262DFEEBBB0F9u, 0x66F6FB97EA6A9D37u,
- 0x672CBA7DE5054485u, 0x6761F48EAF234AD3u, 0x679671B25AEC1D88u, 0x67CC0E1EF1A724EAu, 0x680188D357087712u,
- 0x6835EB082CCA94D7u, 0x686B65CA37FD3A0Du, 0x68A11F9E62FE4448u, 0x68D56785FBBDD55Au, 0x690AC1677AAD4AB0u,
- 0x6940B8E0ACAC4EAEu, 0x6974E718D7D7625Au, 0x69AA20DF0DCD3AF0u, 0x69E0548B68A044D6u, 0x6A1469AE42C8560Cu,
- 0x6A498419D37A6B8Fu, 0x6A7FE52048590672u, 0x6AB3EF342D37A407u, 0x6AE8EB0138858D09u, 0x6B1F25C186A6F04Cu,
- 0x6B537798F428562Fu, 0x6B88557F31326BBBu, 0x6BBE6ADEFD7F06AAu, 0x6BF302CB5E6F642Au, 0x6C27C37E360B3D35u,
- 0x6C5DB45DC38E0C82u, 0x6C9290BA9A38C7D1u, 0x6CC734E940C6F9C5u, 0x6CFD022390F8B837u, 0x6D3221563A9B7322u,
- 0x6D66A9ABC9424FEBu, 0x6D9C5416BB92E3E6u, 0x6DD1B48E353BCE6Fu, 0x6E0621B1C28AC20Bu, 0x6E3BAA1E332D728Eu,
- 0x6E714A52DFFC6799u, 0x6EA59CE797FB817Fu, 0x6EDB04217DFA61DFu, 0x6F10E294EEBC7D2Bu, 0x6F451B3A2A6B9C76u,
- 0x6F7A6208B5068394u, 0x6FB07D457124123Cu, 0x6FE49C96CD6D16CBu, 0x7019C3BC80C85C7Eu, 0x70501A55D07D39CFu,
- 0x708420EB449C8842u, 0x70B9292615C3AA53u, 0x70EF736F9B3494E8u, 0x7123A825C100DD11u, 0x7158922F31411455u,
- 0x718EB6BAFD91596Bu, 0x71C33234DE7AD7E2u, 0x71F7FEC216198DDBu, 0x722DFE729B9FF152u, 0x7262BF07A143F6D3u,
- 0x72976EC98994F488u, 0x72CD4A7BEBFA31AAu, 0x73024E8D737C5F0Au, 0x7336E230D05B76CDu, 0x736C9ABD04725480u,
- 0x73A1E0B622C774D0u, 0x73D658E3AB795204u, 0x740BEF1C9657A685u, 0x74417571DDF6C813u, 0x7475D2CE55747A18u,
- 0x74AB4781EAD1989Eu, 0x74E10CB132C2FF63u, 0x75154FDD7F73BF3Bu, 0x754AA3D4DF50AF0Au, 0x7580A6650B926D66u,
- 0x75B4CFFE4E7708C0u, 0x75EA03FDE214CAF0u, 0x7620427EAD4CFED6u, 0x7654531E58A03E8Bu, 0x768967E5EEC84E2Eu,
- 0x76BFC1DF6A7A61BAu, 0x76F3D92BA28C7D14u, 0x7728CF768B2F9C59u, 0x775F03542DFB8370u, 0x779362149CBD3226u,
- 0x77C83A99C3EC7EAFu, 0x77FE494034E79E5Bu, 0x7832EDC82110C2F9u, 0x7867A93A2954F3B7u, 0x789D9388B3AA30A5u,
- 0x78D27C35704A5E67u, 0x79071B42CC5CF601u, 0x793CE2137F743381u, 0x79720D4C2FA8A030u, 0x79A6909F3B92C83Du,
- 0x79DC34C70A777A4Cu, 0x7A11A0FC668AAC6Fu, 0x7A46093B802D578Bu, 0x7A7B8B8A6038AD6Eu, 0x7AB137367C236C65u,
- 0x7AE585041B2C477Eu, 0x7B1AE64521F7595Eu, 0x7B50CFEB353A97DAu, 0x7B8503E602893DD1u, 0x7BBA44DF832B8D45u,
- 0x7BF06B0BB1FB384Bu, 0x7C2485CE9E7A065Eu, 0x7C59A742461887F6u, 0x7C9008896BCF54F9u, 0x7CC40AABC6C32A38u,
- 0x7CF90D56B873F4C6u, 0x7D2F50AC6690F1F8u, 0x7D63926BC01A973Bu, 0x7D987706B0213D09u, 0x7DCE94C85C298C4Cu,
- 0x7E031CFD3999F7AFu, 0x7E37E43C8800759Bu, 0x7E6DDD4BAA009302u, 0x7EA2AA4F4A405BE1u, 0x7ED754E31CD072D9u,
- 0x7F0D2A1BE4048F90u, 0x7F423A516E82D9BAu, 0x7F76C8E5CA239028u, 0x7FAC7B1F3CAC7433u, 0x7FE1CCF385EBC89Fu,
- 0x7FEFFFFFFFFFFFFFu};
-};
-
-template <class _Floating>
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI
-to_chars_result _Floating_to_chars_general_precision(
- char* _First, char* const _Last, const _Floating _Value, int _Precision) noexcept {
-
- using _Traits = _Floating_type_traits<_Floating>;
- using _Uint_type = typename _Traits::_Uint_type;
-
- const _Uint_type _Uint_value = _VSTD::bit_cast<_Uint_type>(_Value);
-
- if (_Uint_value == 0) { // zero detected; write "0" and return; _Precision is irrelevant due to zero-trimming
- if (_First == _Last) {
- return {_Last, errc::value_too_large};
- }
-
- *_First++ = '0';
-
- return {_First, errc{}};
- }
-
- // C11 7.21.6.1 "The fprintf function"/5:
- // "A negative precision argument is taken as if the precision were omitted."
- // /8: "g,G [...] Let P equal the precision if nonzero, 6 if the precision is omitted,
- // or 1 if the precision is zero."
-
- // Performance note: It's possible to rewrite this for branchless codegen,
- // but profiling will be necessary to determine whether that's faster.
- if (_Precision < 0) {
- _Precision = 6;
- } else if (_Precision == 0) {
- _Precision = 1;
- } else if (_Precision < 1'000'000) {
- // _Precision is ok.
- } else {
- // Avoid integer overflow.
- // Due to general notation's zero-trimming behavior, we can simply clamp _Precision.
- // This is further clamped below.
- _Precision = 1'000'000;
- }
-
- // _Precision is now the Standard's P.
-
- // /8: "Then, if a conversion with style E would have an exponent of X:
- // - if P > X >= -4, the conversion is with style f (or F) and precision P - (X + 1).
- // - otherwise, the conversion is with style e (or E) and precision P - 1."
-
- // /8: "Finally, [...] any trailing zeros are removed from the fractional portion of the result
- // and the decimal-point character is removed if there is no fractional portion remaining."
-
- using _Tables = _General_precision_tables<_Floating>;
-
- const _Uint_type* _Table_begin;
- const _Uint_type* _Table_end;
-
- if (_Precision <= _Tables::_Max_special_P) {
- _Table_begin = _Tables::_Special_X_table + (_Precision - 1) * (_Precision + 10) / 2;
- _Table_end = _Table_begin + _Precision + 5;
- } else {
- _Table_begin = _Tables::_Ordinary_X_table;
- _Table_end = _Table_begin + _VSTD::min(_Precision, _Tables::_Max_P) + 5;
- }
-
- // Profiling indicates that linear search is faster than binary search for small tables.
- // Performance note: lambda captures may have a small performance cost.
- const _Uint_type* const _Table_lower_bound = [=] {
- if constexpr (!_IsSame<_Floating, float>::value) {
- if (_Precision > 155) { // threshold determined via profiling
- return _VSTD::lower_bound(_Table_begin, _Table_end, _Uint_value, less{});
- }
- }
-
- return _VSTD::find_if(_Table_begin, _Table_end, [=](const _Uint_type _Elem) { return _Uint_value <= _Elem; });
- }();
-
- const ptrdiff_t _Table_index = _Table_lower_bound - _Table_begin;
- const int _Scientific_exponent_X = static_cast<int>(_Table_index - 5);
- const bool _Use_fixed_notation = _Precision > _Scientific_exponent_X && _Scientific_exponent_X >= -4;
-
- // Performance note: it might (or might not) be faster to modify Ryu Printf to perform zero-trimming.
- // Such modifications would involve a fairly complicated state machine (notably, both '0' and '9' digits would
- // need to be buffered, due to rounding), and that would have performance costs due to increased branching.
- // Here, we're using a simpler approach: writing into a local buffer, manually zero-trimming, and then copying into
- // the output range. The necessary buffer size is reasonably small, the zero-trimming logic is simple and fast,
- // and the final copying is also fast.
-
- constexpr int _Max_output_length =
- _IsSame<_Floating, float>::value ? 117 : 773; // cases: 0x1.fffffep-126f and 0x1.fffffffffffffp-1022
- constexpr int _Max_fixed_precision =
- _IsSame<_Floating, float>::value ? 37 : 66; // cases: 0x1.fffffep-14f and 0x1.fffffffffffffp-14
- constexpr int _Max_scientific_precision =
- _IsSame<_Floating, float>::value ? 111 : 766; // cases: 0x1.fffffep-126f and 0x1.fffffffffffffp-1022
-
- // Note that _Max_output_length is determined by scientific notation and is more than enough for fixed notation.
- // 0x1.fffffep+127f is 39 digits, plus 1 for '.', plus _Max_fixed_precision for '0' digits, equals 77.
- // 0x1.fffffffffffffp+1023 is 309 digits, plus 1 for '.', plus _Max_fixed_precision for '0' digits, equals 376.
-
- char _Buffer[_Max_output_length];
- const char* const _Significand_first = _Buffer; // e.g. "1.234"
- const char* _Significand_last = nullptr;
- const char* _Exponent_first = nullptr; // e.g. "e-05"
- const char* _Exponent_last = nullptr;
- int _Effective_precision; // number of digits printed after the decimal point, before trimming
-
- // Write into the local buffer.
- // Clamping _Effective_precision allows _Buffer to be as small as possible, and increases efficiency.
- if (_Use_fixed_notation) {
- _Effective_precision = _VSTD::min(_Precision - (_Scientific_exponent_X + 1), _Max_fixed_precision);
- const to_chars_result _Buf_result =
- _Floating_to_chars_fixed_precision(_Buffer, _VSTD::end(_Buffer), _Value, _Effective_precision);
- _LIBCPP_ASSERT(_Buf_result.ec == errc{}, "");
- _Significand_last = _Buf_result.ptr;
- } else {
- _Effective_precision = _VSTD::min(_Precision - 1, _Max_scientific_precision);
- const to_chars_result _Buf_result =
- _Floating_to_chars_scientific_precision(_Buffer, _VSTD::end(_Buffer), _Value, _Effective_precision);
- _LIBCPP_ASSERT(_Buf_result.ec == errc{}, "");
- _Significand_last = _VSTD::find(_Buffer, _Buf_result.ptr, 'e');
- _Exponent_first = _Significand_last;
- _Exponent_last = _Buf_result.ptr;
- }
-
- // If we printed a decimal point followed by digits, perform zero-trimming.
- if (_Effective_precision > 0) {
- while (_Significand_last[-1] == '0') { // will stop at '.' or a nonzero digit
- --_Significand_last;
- }
-
- if (_Significand_last[-1] == '.') {
- --_Significand_last;
- }
- }
-
- // Copy the significand to the output range.
- const ptrdiff_t _Significand_distance = _Significand_last - _Significand_first;
- if (_Last - _First < _Significand_distance) {
- return {_Last, errc::value_too_large};
- }
- _VSTD::memcpy(_First, _Significand_first, static_cast<size_t>(_Significand_distance));
- _First += _Significand_distance;
-
- // Copy the exponent to the output range.
- if (!_Use_fixed_notation) {
- const ptrdiff_t _Exponent_distance = _Exponent_last - _Exponent_first;
- if (_Last - _First < _Exponent_distance) {
- return {_Last, errc::value_too_large};
- }
- _VSTD::memcpy(_First, _Exponent_first, static_cast<size_t>(_Exponent_distance));
- _First += _Exponent_distance;
- }
-
- return {_First, errc{}};
-}
-
-enum class _Floating_to_chars_overload { _Plain, _Format_only, _Format_precision };
-
-template <_Floating_to_chars_overload _Overload, class _Floating>
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI
-to_chars_result _Floating_to_chars(
- char* _First, char* const _Last, _Floating _Value, const chars_format _Fmt, const int _Precision) noexcept {
-
- if constexpr (_Overload == _Floating_to_chars_overload::_Plain) {
- _LIBCPP_ASSERT(_Fmt == chars_format{}, ""); // plain overload must pass chars_format{} internally
- } else {
- _LIBCPP_ASSERT(_Fmt == chars_format::general || _Fmt == chars_format::scientific || _Fmt == chars_format::fixed
- || _Fmt == chars_format::hex,
- "invalid format in to_chars()");
- }
-
- using _Traits = _Floating_type_traits<_Floating>;
- using _Uint_type = typename _Traits::_Uint_type;
-
- _Uint_type _Uint_value = _VSTD::bit_cast<_Uint_type>(_Value);
-
- const bool _Was_negative = (_Uint_value & _Traits::_Shifted_sign_mask) != 0;
-
- if (_Was_negative) { // sign bit detected; write minus sign and clear sign bit
- if (_First == _Last) {
- return {_Last, errc::value_too_large};
- }
-
- *_First++ = '-';
-
- _Uint_value &= ~_Traits::_Shifted_sign_mask;
- _Value = _VSTD::bit_cast<_Floating>(_Uint_value);
- }
-
- if ((_Uint_value & _Traits::_Shifted_exponent_mask) == _Traits::_Shifted_exponent_mask) {
- // inf/nan detected; write appropriate string and return
- const char* _Str;
- size_t _Len;
-
- const _Uint_type _Mantissa = _Uint_value & _Traits::_Denormal_mantissa_mask;
-
- if (_Mantissa == 0) {
- _Str = "inf";
- _Len = 3;
- } else if (_Was_negative && _Mantissa == _Traits::_Special_nan_mantissa_mask) {
- // When a NaN value has the sign bit set, the quiet bit set, and all other mantissa bits cleared,
- // the UCRT interprets it to mean "indeterminate", and indicates this by printing "-nan(ind)".
- _Str = "nan(ind)";
- _Len = 8;
- } else if ((_Mantissa & _Traits::_Special_nan_mantissa_mask) != 0) {
- _Str = "nan";
- _Len = 3;
- } else {
- _Str = "nan(snan)";
- _Len = 9;
- }
-
- if (_Last - _First < static_cast<ptrdiff_t>(_Len)) {
- return {_Last, errc::value_too_large};
- }
-
- _VSTD::memcpy(_First, _Str, _Len);
-
- return {_First + _Len, errc{}};
- }
-
- if constexpr (_Overload == _Floating_to_chars_overload::_Plain) {
- return _Floating_to_chars_ryu(_First, _Last, _Value, chars_format{});
- } else if constexpr (_Overload == _Floating_to_chars_overload::_Format_only) {
- if (_Fmt == chars_format::hex) {
- return _Floating_to_chars_hex_shortest(_First, _Last, _Value);
- }
-
- return _Floating_to_chars_ryu(_First, _Last, _Value, _Fmt);
- } else if constexpr (_Overload == _Floating_to_chars_overload::_Format_precision) {
- switch (_Fmt) {
- case chars_format::scientific:
- return _Floating_to_chars_scientific_precision(_First, _Last, _Value, _Precision);
- case chars_format::fixed:
- return _Floating_to_chars_fixed_precision(_First, _Last, _Value, _Precision);
- case chars_format::general:
- return _Floating_to_chars_general_precision(_First, _Last, _Value, _Precision);
- case chars_format::hex:
- default: // avoid MSVC warning C4715: not all control paths return a value
- return _Floating_to_chars_hex_precision(_First, _Last, _Value, _Precision);
- }
- }
-}
-
-// clang-format on
-
-_LIBCPP_END_NAMESPACE_STD
-
-#endif // _LIBCPP_SRC_INCLUDE_TO_CHARS_FLOATING_POINT_H
diff --git a/src/ryu/README.txt b/src/ryu/README.txt
deleted file mode 100644
index e3d1746..0000000
--- a/src/ryu/README.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-The code in this directory is based on Ulf Adams's work. The upstream for the
-code is:
-
-https://github.com/ulfjack/ryu/tree/59661c3/ryu
-
-The code has been adapted by Stephan T. Lavavej of Microsoft for usage in
-std::to_chars. This code has been contributed by Microsoft for inclusion in
-libc++.
-
-The code in this directory has a different coding style than other parts to
-minimize the number of changes by both upstream sources.
diff --git a/src/ryu/d2fixed.cpp b/src/ryu/d2fixed.cpp
deleted file mode 100644
index 699f915..0000000
--- a/src/ryu/d2fixed.cpp
+++ /dev/null
@@ -1,669 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Copyright (c) Microsoft Corporation.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-// Copyright 2018 Ulf Adams
-// Copyright (c) Microsoft Corporation. All rights reserved.
-
-// Boost Software License - Version 1.0 - August 17th, 2003
-
-// Permission is hereby granted, free of charge, to any person or organization
-// obtaining a copy of the software and accompanying documentation covered by
-// this license (the "Software") to use, reproduce, display, distribute,
-// execute, and transmit the Software, and to prepare derivative works of the
-// Software, and to permit third-parties to whom the Software is furnished to
-// do so, all subject to the following:
-
-// The copyright notices in the Software and this entire statement, including
-// the above license grant, this restriction and the following disclaimer,
-// must be included in all copies of the Software, in whole or in part, and
-// all derivative works of the Software, unless such copies or derivative
-// works are solely in the form of machine-executable object code generated by
-// a source language processor.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-// Avoid formatting to keep the changes with the original code minimal.
-// clang-format off
-
-#include "__config"
-#include "charconv"
-#include "cstring"
-#include "system_error"
-
-#include "include/ryu/common.h"
-#include "include/ryu/d2fixed.h"
-#include "include/ryu/d2fixed_full_table.h"
-#include "include/ryu/d2s.h"
-#include "include/ryu/d2s_intrinsics.h"
-#include "include/ryu/digit_table.h"
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-inline constexpr int __POW10_ADDITIONAL_BITS = 120;
-
-#ifdef _LIBCPP_INTRINSIC128
-// Returns the low 64 bits of the high 128 bits of the 256-bit product of a and b.
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __umul256_hi128_lo64(
- const uint64_t __aHi, const uint64_t __aLo, const uint64_t __bHi, const uint64_t __bLo) {
- uint64_t __b00Hi;
- const uint64_t __b00Lo = __ryu_umul128(__aLo, __bLo, &__b00Hi);
- uint64_t __b01Hi;
- const uint64_t __b01Lo = __ryu_umul128(__aLo, __bHi, &__b01Hi);
- uint64_t __b10Hi;
- const uint64_t __b10Lo = __ryu_umul128(__aHi, __bLo, &__b10Hi);
- uint64_t __b11Hi;
- const uint64_t __b11Lo = __ryu_umul128(__aHi, __bHi, &__b11Hi);
- (void) __b00Lo; // unused
- (void) __b11Hi; // unused
- const uint64_t __temp1Lo = __b10Lo + __b00Hi;
- const uint64_t __temp1Hi = __b10Hi + (__temp1Lo < __b10Lo);
- const uint64_t __temp2Lo = __b01Lo + __temp1Lo;
- const uint64_t __temp2Hi = __b01Hi + (__temp2Lo < __b01Lo);
- return __b11Lo + __temp1Hi + __temp2Hi;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __uint128_mod1e9(const uint64_t __vHi, const uint64_t __vLo) {
- // After multiplying, we're going to shift right by 29, then truncate to uint32_t.
- // This means that we need only 29 + 32 = 61 bits, so we can truncate to uint64_t before shifting.
- const uint64_t __multiplied = __umul256_hi128_lo64(__vHi, __vLo, 0x89705F4136B4A597u, 0x31680A88F8953031u);
-
- // For uint32_t truncation, see the __mod1e9() comment in d2s_intrinsics.h.
- const uint32_t __shifted = static_cast<uint32_t>(__multiplied >> 29);
-
- return static_cast<uint32_t>(__vLo) - 1000000000 * __shifted;
-}
-#endif // ^^^ intrinsics available ^^^
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __mulShift_mod1e9(const uint64_t __m, const uint64_t* const __mul, const int32_t __j) {
- uint64_t __high0; // 64
- const uint64_t __low0 = __ryu_umul128(__m, __mul[0], &__high0); // 0
- uint64_t __high1; // 128
- const uint64_t __low1 = __ryu_umul128(__m, __mul[1], &__high1); // 64
- uint64_t __high2; // 192
- const uint64_t __low2 = __ryu_umul128(__m, __mul[2], &__high2); // 128
- const uint64_t __s0low = __low0; // 0
- (void) __s0low; // unused
- const uint64_t __s0high = __low1 + __high0; // 64
- const uint32_t __c1 = __s0high < __low1;
- const uint64_t __s1low = __low2 + __high1 + __c1; // 128
- const uint32_t __c2 = __s1low < __low2; // __high1 + __c1 can't overflow, so compare against __low2
- const uint64_t __s1high = __high2 + __c2; // 192
- _LIBCPP_ASSERT(__j >= 128, "");
- _LIBCPP_ASSERT(__j <= 180, "");
-#ifdef _LIBCPP_INTRINSIC128
- const uint32_t __dist = static_cast<uint32_t>(__j - 128); // __dist: [0, 52]
- const uint64_t __shiftedhigh = __s1high >> __dist;
- const uint64_t __shiftedlow = __ryu_shiftright128(__s1low, __s1high, __dist);
- return __uint128_mod1e9(__shiftedhigh, __shiftedlow);
-#else // ^^^ intrinsics available ^^^ / vvv intrinsics unavailable vvv
- if (__j < 160) { // __j: [128, 160)
- const uint64_t __r0 = __mod1e9(__s1high);
- const uint64_t __r1 = __mod1e9((__r0 << 32) | (__s1low >> 32));
- const uint64_t __r2 = ((__r1 << 32) | (__s1low & 0xffffffff));
- return __mod1e9(__r2 >> (__j - 128));
- } else { // __j: [160, 192)
- const uint64_t __r0 = __mod1e9(__s1high);
- const uint64_t __r1 = ((__r0 << 32) | (__s1low >> 32));
- return __mod1e9(__r1 >> (__j - 160));
- }
-#endif // ^^^ intrinsics unavailable ^^^
-}
-
-void __append_n_digits(const uint32_t __olength, uint32_t __digits, char* const __result) {
- uint32_t __i = 0;
- while (__digits >= 10000) {
-#ifdef __clang__ // TRANSITION, LLVM-38217
- const uint32_t __c = __digits - 10000 * (__digits / 10000);
-#else
- const uint32_t __c = __digits % 10000;
-#endif
- __digits /= 10000;
- const uint32_t __c0 = (__c % 100) << 1;
- const uint32_t __c1 = (__c / 100) << 1;
- _VSTD::memcpy(__result + __olength - __i - 2, __DIGIT_TABLE + __c0, 2);
- _VSTD::memcpy(__result + __olength - __i - 4, __DIGIT_TABLE + __c1, 2);
- __i += 4;
- }
- if (__digits >= 100) {
- const uint32_t __c = (__digits % 100) << 1;
- __digits /= 100;
- _VSTD::memcpy(__result + __olength - __i - 2, __DIGIT_TABLE + __c, 2);
- __i += 2;
- }
- if (__digits >= 10) {
- const uint32_t __c = __digits << 1;
- _VSTD::memcpy(__result + __olength - __i - 2, __DIGIT_TABLE + __c, 2);
- } else {
- __result[0] = static_cast<char>('0' + __digits);
- }
-}
-
-_LIBCPP_HIDE_FROM_ABI inline void __append_d_digits(const uint32_t __olength, uint32_t __digits, char* const __result) {
- uint32_t __i = 0;
- while (__digits >= 10000) {
-#ifdef __clang__ // TRANSITION, LLVM-38217
- const uint32_t __c = __digits - 10000 * (__digits / 10000);
-#else
- const uint32_t __c = __digits % 10000;
-#endif
- __digits /= 10000;
- const uint32_t __c0 = (__c % 100) << 1;
- const uint32_t __c1 = (__c / 100) << 1;
- _VSTD::memcpy(__result + __olength + 1 - __i - 2, __DIGIT_TABLE + __c0, 2);
- _VSTD::memcpy(__result + __olength + 1 - __i - 4, __DIGIT_TABLE + __c1, 2);
- __i += 4;
- }
- if (__digits >= 100) {
- const uint32_t __c = (__digits % 100) << 1;
- __digits /= 100;
- _VSTD::memcpy(__result + __olength + 1 - __i - 2, __DIGIT_TABLE + __c, 2);
- __i += 2;
- }
- if (__digits >= 10) {
- const uint32_t __c = __digits << 1;
- __result[2] = __DIGIT_TABLE[__c + 1];
- __result[1] = '.';
- __result[0] = __DIGIT_TABLE[__c];
- } else {
- __result[1] = '.';
- __result[0] = static_cast<char>('0' + __digits);
- }
-}
-
-_LIBCPP_HIDE_FROM_ABI inline void __append_c_digits(const uint32_t __count, uint32_t __digits, char* const __result) {
- uint32_t __i = 0;
- for (; __i < __count - 1; __i += 2) {
- const uint32_t __c = (__digits % 100) << 1;
- __digits /= 100;
- _VSTD::memcpy(__result + __count - __i - 2, __DIGIT_TABLE + __c, 2);
- }
- if (__i < __count) {
- const char __c = static_cast<char>('0' + (__digits % 10));
- __result[__count - __i - 1] = __c;
- }
-}
-
-void __append_nine_digits(uint32_t __digits, char* const __result) {
- if (__digits == 0) {
- _VSTD::memset(__result, '0', 9);
- return;
- }
-
- for (uint32_t __i = 0; __i < 5; __i += 4) {
-#ifdef __clang__ // TRANSITION, LLVM-38217
- const uint32_t __c = __digits - 10000 * (__digits / 10000);
-#else
- const uint32_t __c = __digits % 10000;
-#endif
- __digits /= 10000;
- const uint32_t __c0 = (__c % 100) << 1;
- const uint32_t __c1 = (__c / 100) << 1;
- _VSTD::memcpy(__result + 7 - __i, __DIGIT_TABLE + __c0, 2);
- _VSTD::memcpy(__result + 5 - __i, __DIGIT_TABLE + __c1, 2);
- }
- __result[0] = static_cast<char>('0' + __digits);
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __indexForExponent(const uint32_t __e) {
- return (__e + 15) / 16;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __pow10BitsForIndex(const uint32_t __idx) {
- return 16 * __idx + __POW10_ADDITIONAL_BITS;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __lengthForIndex(const uint32_t __idx) {
- // +1 for ceil, +16 for mantissa, +8 to round up when dividing by 9
- return (__log10Pow2(16 * static_cast<int32_t>(__idx)) + 1 + 16 + 8) / 9;
-}
-
-[[nodiscard]] to_chars_result __d2fixed_buffered_n(char* _First, char* const _Last, const double __d,
- const uint32_t __precision) {
- char* const _Original_first = _First;
-
- const uint64_t __bits = __double_to_bits(__d);
-
- // Case distinction; exit early for the easy cases.
- if (__bits == 0) {
- const int32_t _Total_zero_length = 1 // leading zero
- + static_cast<int32_t>(__precision != 0) // possible decimal point
- + static_cast<int32_t>(__precision); // zeroes after decimal point
-
- if (_Last - _First < _Total_zero_length) {
- return { _Last, errc::value_too_large };
- }
-
- *_First++ = '0';
- if (__precision > 0) {
- *_First++ = '.';
- _VSTD::memset(_First, '0', __precision);
- _First += __precision;
- }
- return { _First, errc{} };
- }
-
- // Decode __bits into mantissa and exponent.
- const uint64_t __ieeeMantissa = __bits & ((1ull << __DOUBLE_MANTISSA_BITS) - 1);
- const uint32_t __ieeeExponent = static_cast<uint32_t>(__bits >> __DOUBLE_MANTISSA_BITS);
-
- int32_t __e2;
- uint64_t __m2;
- if (__ieeeExponent == 0) {
- __e2 = 1 - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS;
- __m2 = __ieeeMantissa;
- } else {
- __e2 = static_cast<int32_t>(__ieeeExponent) - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS;
- __m2 = (1ull << __DOUBLE_MANTISSA_BITS) | __ieeeMantissa;
- }
-
- bool __nonzero = false;
- if (__e2 >= -52) {
- const uint32_t __idx = __e2 < 0 ? 0 : __indexForExponent(static_cast<uint32_t>(__e2));
- const uint32_t __p10bits = __pow10BitsForIndex(__idx);
- const int32_t __len = static_cast<int32_t>(__lengthForIndex(__idx));
- for (int32_t __i = __len - 1; __i >= 0; --__i) {
- const uint32_t __j = __p10bits - __e2;
- // Temporary: __j is usually around 128, and by shifting a bit, we push it to 128 or above, which is
- // a slightly faster code path in __mulShift_mod1e9. Instead, we can just increase the multipliers.
- const uint32_t __digits = __mulShift_mod1e9(__m2 << 8, __POW10_SPLIT[__POW10_OFFSET[__idx] + __i],
- static_cast<int32_t>(__j + 8));
- if (__nonzero) {
- if (_Last - _First < 9) {
- return { _Last, errc::value_too_large };
- }
- __append_nine_digits(__digits, _First);
- _First += 9;
- } else if (__digits != 0) {
- const uint32_t __olength = __decimalLength9(__digits);
- if (_Last - _First < static_cast<ptrdiff_t>(__olength)) {
- return { _Last, errc::value_too_large };
- }
- __append_n_digits(__olength, __digits, _First);
- _First += __olength;
- __nonzero = true;
- }
- }
- }
- if (!__nonzero) {
- if (_First == _Last) {
- return { _Last, errc::value_too_large };
- }
- *_First++ = '0';
- }
- if (__precision > 0) {
- if (_First == _Last) {
- return { _Last, errc::value_too_large };
- }
- *_First++ = '.';
- }
- if (__e2 < 0) {
- const int32_t __idx = -__e2 / 16;
- const uint32_t __blocks = __precision / 9 + 1;
- // 0 = don't round up; 1 = round up unconditionally; 2 = round up if odd.
- int __roundUp = 0;
- uint32_t __i = 0;
- if (__blocks <= __MIN_BLOCK_2[__idx]) {
- __i = __blocks;
- if (_Last - _First < static_cast<ptrdiff_t>(__precision)) {
- return { _Last, errc::value_too_large };
- }
- _VSTD::memset(_First, '0', __precision);
- _First += __precision;
- } else if (__i < __MIN_BLOCK_2[__idx]) {
- __i = __MIN_BLOCK_2[__idx];
- if (_Last - _First < static_cast<ptrdiff_t>(9 * __i)) {
- return { _Last, errc::value_too_large };
- }
- _VSTD::memset(_First, '0', 9 * __i);
- _First += 9 * __i;
- }
- for (; __i < __blocks; ++__i) {
- const int32_t __j = __ADDITIONAL_BITS_2 + (-__e2 - 16 * __idx);
- const uint32_t __p = __POW10_OFFSET_2[__idx] + __i - __MIN_BLOCK_2[__idx];
- if (__p >= __POW10_OFFSET_2[__idx + 1]) {
- // If the remaining digits are all 0, then we might as well use memset.
- // No rounding required in this case.
- const uint32_t __fill = __precision - 9 * __i;
- if (_Last - _First < static_cast<ptrdiff_t>(__fill)) {
- return { _Last, errc::value_too_large };
- }
- _VSTD::memset(_First, '0', __fill);
- _First += __fill;
- break;
- }
- // Temporary: __j is usually around 128, and by shifting a bit, we push it to 128 or above, which is
- // a slightly faster code path in __mulShift_mod1e9. Instead, we can just increase the multipliers.
- uint32_t __digits = __mulShift_mod1e9(__m2 << 8, __POW10_SPLIT_2[__p], __j + 8);
- if (__i < __blocks - 1) {
- if (_Last - _First < 9) {
- return { _Last, errc::value_too_large };
- }
- __append_nine_digits(__digits, _First);
- _First += 9;
- } else {
- const uint32_t __maximum = __precision - 9 * __i;
- uint32_t __lastDigit = 0;
- for (uint32_t __k = 0; __k < 9 - __maximum; ++__k) {
- __lastDigit = __digits % 10;
- __digits /= 10;
- }
- if (__lastDigit != 5) {
- __roundUp = __lastDigit > 5;
- } else {
- // Is m * 10^(additionalDigits + 1) / 2^(-__e2) integer?
- const int32_t __requiredTwos = -__e2 - static_cast<int32_t>(__precision) - 1;
- const bool __trailingZeros = __requiredTwos <= 0
- || (__requiredTwos < 60 && __multipleOfPowerOf2(__m2, static_cast<uint32_t>(__requiredTwos)));
- __roundUp = __trailingZeros ? 2 : 1;
- }
- if (__maximum > 0) {
- if (_Last - _First < static_cast<ptrdiff_t>(__maximum)) {
- return { _Last, errc::value_too_large };
- }
- __append_c_digits(__maximum, __digits, _First);
- _First += __maximum;
- }
- break;
- }
- }
- if (__roundUp != 0) {
- char* _Round = _First;
- char* _Dot = _Last;
- while (true) {
- if (_Round == _Original_first) {
- _Round[0] = '1';
- if (_Dot != _Last) {
- _Dot[0] = '0';
- _Dot[1] = '.';
- }
- if (_First == _Last) {
- return { _Last, errc::value_too_large };
- }
- *_First++ = '0';
- break;
- }
- --_Round;
- const char __c = _Round[0];
- if (__c == '.') {
- _Dot = _Round;
- } else if (__c == '9') {
- _Round[0] = '0';
- __roundUp = 1;
- } else {
- if (__roundUp == 1 || __c % 2 != 0) {
- _Round[0] = __c + 1;
- }
- break;
- }
- }
- }
- } else {
- if (_Last - _First < static_cast<ptrdiff_t>(__precision)) {
- return { _Last, errc::value_too_large };
- }
- _VSTD::memset(_First, '0', __precision);
- _First += __precision;
- }
- return { _First, errc{} };
-}
-
-[[nodiscard]] to_chars_result __d2exp_buffered_n(char* _First, char* const _Last, const double __d,
- uint32_t __precision) {
- char* const _Original_first = _First;
-
- const uint64_t __bits = __double_to_bits(__d);
-
- // Case distinction; exit early for the easy cases.
- if (__bits == 0) {
- const int32_t _Total_zero_length = 1 // leading zero
- + static_cast<int32_t>(__precision != 0) // possible decimal point
- + static_cast<int32_t>(__precision) // zeroes after decimal point
- + 4; // "e+00"
- if (_Last - _First < _Total_zero_length) {
- return { _Last, errc::value_too_large };
- }
- *_First++ = '0';
- if (__precision > 0) {
- *_First++ = '.';
- _VSTD::memset(_First, '0', __precision);
- _First += __precision;
- }
- _VSTD::memcpy(_First, "e+00", 4);
- _First += 4;
- return { _First, errc{} };
- }
-
- // Decode __bits into mantissa and exponent.
- const uint64_t __ieeeMantissa = __bits & ((1ull << __DOUBLE_MANTISSA_BITS) - 1);
- const uint32_t __ieeeExponent = static_cast<uint32_t>(__bits >> __DOUBLE_MANTISSA_BITS);
-
- int32_t __e2;
- uint64_t __m2;
- if (__ieeeExponent == 0) {
- __e2 = 1 - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS;
- __m2 = __ieeeMantissa;
- } else {
- __e2 = static_cast<int32_t>(__ieeeExponent) - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS;
- __m2 = (1ull << __DOUBLE_MANTISSA_BITS) | __ieeeMantissa;
- }
-
- const bool __printDecimalPoint = __precision > 0;
- ++__precision;
- uint32_t __digits = 0;
- uint32_t __printedDigits = 0;
- uint32_t __availableDigits = 0;
- int32_t __exp = 0;
- if (__e2 >= -52) {
- const uint32_t __idx = __e2 < 0 ? 0 : __indexForExponent(static_cast<uint32_t>(__e2));
- const uint32_t __p10bits = __pow10BitsForIndex(__idx);
- const int32_t __len = static_cast<int32_t>(__lengthForIndex(__idx));
- for (int32_t __i = __len - 1; __i >= 0; --__i) {
- const uint32_t __j = __p10bits - __e2;
- // Temporary: __j is usually around 128, and by shifting a bit, we push it to 128 or above, which is
- // a slightly faster code path in __mulShift_mod1e9. Instead, we can just increase the multipliers.
- __digits = __mulShift_mod1e9(__m2 << 8, __POW10_SPLIT[__POW10_OFFSET[__idx] + __i],
- static_cast<int32_t>(__j + 8));
- if (__printedDigits != 0) {
- if (__printedDigits + 9 > __precision) {
- __availableDigits = 9;
- break;
- }
- if (_Last - _First < 9) {
- return { _Last, errc::value_too_large };
- }
- __append_nine_digits(__digits, _First);
- _First += 9;
- __printedDigits += 9;
- } else if (__digits != 0) {
- __availableDigits = __decimalLength9(__digits);
- __exp = __i * 9 + static_cast<int32_t>(__availableDigits) - 1;
- if (__availableDigits > __precision) {
- break;
- }
- if (__printDecimalPoint) {
- if (_Last - _First < static_cast<ptrdiff_t>(__availableDigits + 1)) {
- return { _Last, errc::value_too_large };
- }
- __append_d_digits(__availableDigits, __digits, _First);
- _First += __availableDigits + 1; // +1 for decimal point
- } else {
- if (_First == _Last) {
- return { _Last, errc::value_too_large };
- }
- *_First++ = static_cast<char>('0' + __digits);
- }
- __printedDigits = __availableDigits;
- __availableDigits = 0;
- }
- }
- }
-
- if (__e2 < 0 && __availableDigits == 0) {
- const int32_t __idx = -__e2 / 16;
- for (int32_t __i = __MIN_BLOCK_2[__idx]; __i < 200; ++__i) {
- const int32_t __j = __ADDITIONAL_BITS_2 + (-__e2 - 16 * __idx);
- const uint32_t __p = __POW10_OFFSET_2[__idx] + static_cast<uint32_t>(__i) - __MIN_BLOCK_2[__idx];
- // Temporary: __j is usually around 128, and by shifting a bit, we push it to 128 or above, which is
- // a slightly faster code path in __mulShift_mod1e9. Instead, we can just increase the multipliers.
- __digits = (__p >= __POW10_OFFSET_2[__idx + 1]) ? 0 : __mulShift_mod1e9(__m2 << 8, __POW10_SPLIT_2[__p], __j + 8);
- if (__printedDigits != 0) {
- if (__printedDigits + 9 > __precision) {
- __availableDigits = 9;
- break;
- }
- if (_Last - _First < 9) {
- return { _Last, errc::value_too_large };
- }
- __append_nine_digits(__digits, _First);
- _First += 9;
- __printedDigits += 9;
- } else if (__digits != 0) {
- __availableDigits = __decimalLength9(__digits);
- __exp = -(__i + 1) * 9 + static_cast<int32_t>(__availableDigits) - 1;
- if (__availableDigits > __precision) {
- break;
- }
- if (__printDecimalPoint) {
- if (_Last - _First < static_cast<ptrdiff_t>(__availableDigits + 1)) {
- return { _Last, errc::value_too_large };
- }
- __append_d_digits(__availableDigits, __digits, _First);
- _First += __availableDigits + 1; // +1 for decimal point
- } else {
- if (_First == _Last) {
- return { _Last, errc::value_too_large };
- }
- *_First++ = static_cast<char>('0' + __digits);
- }
- __printedDigits = __availableDigits;
- __availableDigits = 0;
- }
- }
- }
-
- const uint32_t __maximum = __precision - __printedDigits;
- if (__availableDigits == 0) {
- __digits = 0;
- }
- uint32_t __lastDigit = 0;
- if (__availableDigits > __maximum) {
- for (uint32_t __k = 0; __k < __availableDigits - __maximum; ++__k) {
- __lastDigit = __digits % 10;
- __digits /= 10;
- }
- }
- // 0 = don't round up; 1 = round up unconditionally; 2 = round up if odd.
- int __roundUp = 0;
- if (__lastDigit != 5) {
- __roundUp = __lastDigit > 5;
- } else {
- // Is m * 2^__e2 * 10^(__precision + 1 - __exp) integer?
- // __precision was already increased by 1, so we don't need to write + 1 here.
- const int32_t __rexp = static_cast<int32_t>(__precision) - __exp;
- const int32_t __requiredTwos = -__e2 - __rexp;
- bool __trailingZeros = __requiredTwos <= 0
- || (__requiredTwos < 60 && __multipleOfPowerOf2(__m2, static_cast<uint32_t>(__requiredTwos)));
- if (__rexp < 0) {
- const int32_t __requiredFives = -__rexp;
- __trailingZeros = __trailingZeros && __multipleOfPowerOf5(__m2, static_cast<uint32_t>(__requiredFives));
- }
- __roundUp = __trailingZeros ? 2 : 1;
- }
- if (__printedDigits != 0) {
- if (_Last - _First < static_cast<ptrdiff_t>(__maximum)) {
- return { _Last, errc::value_too_large };
- }
- if (__digits == 0) {
- _VSTD::memset(_First, '0', __maximum);
- } else {
- __append_c_digits(__maximum, __digits, _First);
- }
- _First += __maximum;
- } else {
- if (__printDecimalPoint) {
- if (_Last - _First < static_cast<ptrdiff_t>(__maximum + 1)) {
- return { _Last, errc::value_too_large };
- }
- __append_d_digits(__maximum, __digits, _First);
- _First += __maximum + 1; // +1 for decimal point
- } else {
- if (_First == _Last) {
- return { _Last, errc::value_too_large };
- }
- *_First++ = static_cast<char>('0' + __digits);
- }
- }
- if (__roundUp != 0) {
- char* _Round = _First;
- while (true) {
- if (_Round == _Original_first) {
- _Round[0] = '1';
- ++__exp;
- break;
- }
- --_Round;
- const char __c = _Round[0];
- if (__c == '.') {
- // Keep going.
- } else if (__c == '9') {
- _Round[0] = '0';
- __roundUp = 1;
- } else {
- if (__roundUp == 1 || __c % 2 != 0) {
- _Round[0] = __c + 1;
- }
- break;
- }
- }
- }
-
- char _Sign_character;
-
- if (__exp < 0) {
- _Sign_character = '-';
- __exp = -__exp;
- } else {
- _Sign_character = '+';
- }
-
- const int _Exponent_part_length = __exp >= 100
- ? 5 // "e+NNN"
- : 4; // "e+NN"
-
- if (_Last - _First < _Exponent_part_length) {
- return { _Last, errc::value_too_large };
- }
-
- *_First++ = 'e';
- *_First++ = _Sign_character;
-
- if (__exp >= 100) {
- const int32_t __c = __exp % 10;
- _VSTD::memcpy(_First, __DIGIT_TABLE + 2 * (__exp / 10), 2);
- _First[2] = static_cast<char>('0' + __c);
- _First += 3;
- } else {
- _VSTD::memcpy(_First, __DIGIT_TABLE + 2 * __exp, 2);
- _First += 2;
- }
-
- return { _First, errc{} };
-}
-
-_LIBCPP_END_NAMESPACE_STD
-
-// clang-format on
diff --git a/src/ryu/d2s.cpp b/src/ryu/d2s.cpp
deleted file mode 100644
index 510b4b8..0000000
--- a/src/ryu/d2s.cpp
+++ /dev/null
@@ -1,782 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Copyright (c) Microsoft Corporation.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-// Copyright 2018 Ulf Adams
-// Copyright (c) Microsoft Corporation. All rights reserved.
-
-// Boost Software License - Version 1.0 - August 17th, 2003
-
-// Permission is hereby granted, free of charge, to any person or organization
-// obtaining a copy of the software and accompanying documentation covered by
-// this license (the "Software") to use, reproduce, display, distribute,
-// execute, and transmit the Software, and to prepare derivative works of the
-// Software, and to permit third-parties to whom the Software is furnished to
-// do so, all subject to the following:
-
-// The copyright notices in the Software and this entire statement, including
-// the above license grant, this restriction and the following disclaimer,
-// must be included in all copies of the Software, in whole or in part, and
-// all derivative works of the Software, unless such copies or derivative
-// works are solely in the form of machine-executable object code generated by
-// a source language processor.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-// Avoid formatting to keep the changes with the original code minimal.
-// clang-format off
-
-#include "__config"
-#include "charconv"
-
-#include "include/ryu/common.h"
-#include "include/ryu/d2fixed.h"
-#include "include/ryu/d2s.h"
-#include "include/ryu/d2s_full_table.h"
-#include "include/ryu/d2s_intrinsics.h"
-#include "include/ryu/digit_table.h"
-#include "include/ryu/ryu.h"
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-// We need a 64x128-bit multiplication and a subsequent 128-bit shift.
-// Multiplication:
-// The 64-bit factor is variable and passed in, the 128-bit factor comes
-// from a lookup table. We know that the 64-bit factor only has 55
-// significant bits (i.e., the 9 topmost bits are zeros). The 128-bit
-// factor only has 124 significant bits (i.e., the 4 topmost bits are
-// zeros).
-// Shift:
-// In principle, the multiplication result requires 55 + 124 = 179 bits to
-// represent. However, we then shift this value to the right by __j, which is
-// at least __j >= 115, so the result is guaranteed to fit into 179 - 115 = 64
-// bits. This means that we only need the topmost 64 significant bits of
-// the 64x128-bit multiplication.
-//
-// There are several ways to do this:
-// 1. Best case: the compiler exposes a 128-bit type.
-// We perform two 64x64-bit multiplications, add the higher 64 bits of the
-// lower result to the higher result, and shift by __j - 64 bits.
-//
-// We explicitly cast from 64-bit to 128-bit, so the compiler can tell
-// that these are only 64-bit inputs, and can map these to the best
-// possible sequence of assembly instructions.
-// x64 machines happen to have matching assembly instructions for
-// 64x64-bit multiplications and 128-bit shifts.
-//
-// 2. Second best case: the compiler exposes intrinsics for the x64 assembly
-// instructions mentioned in 1.
-//
-// 3. We only have 64x64 bit instructions that return the lower 64 bits of
-// the result, i.e., we have to use plain C.
-// Our inputs are less than the full width, so we have three options:
-// a. Ignore this fact and just implement the intrinsics manually.
-// b. Split both into 31-bit pieces, which guarantees no internal overflow,
-// but requires extra work upfront (unless we change the lookup table).
-// c. Split only the first factor into 31-bit pieces, which also guarantees
-// no internal overflow, but requires extra work since the intermediate
-// results are not perfectly aligned.
-#ifdef _LIBCPP_INTRINSIC128
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __mulShift(const uint64_t __m, const uint64_t* const __mul, const int32_t __j) {
- // __m is maximum 55 bits
- uint64_t __high1; // 128
- const uint64_t __low1 = __ryu_umul128(__m, __mul[1], &__high1); // 64
- uint64_t __high0; // 64
- (void) __ryu_umul128(__m, __mul[0], &__high0); // 0
- const uint64_t __sum = __high0 + __low1;
- if (__sum < __high0) {
- ++__high1; // overflow into __high1
- }
- return __ryu_shiftright128(__sum, __high1, static_cast<uint32_t>(__j - 64));
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __mulShiftAll(const uint64_t __m, const uint64_t* const __mul, const int32_t __j,
- uint64_t* const __vp, uint64_t* const __vm, const uint32_t __mmShift) {
- *__vp = __mulShift(4 * __m + 2, __mul, __j);
- *__vm = __mulShift(4 * __m - 1 - __mmShift, __mul, __j);
- return __mulShift(4 * __m, __mul, __j);
-}
-
-#else // ^^^ intrinsics available ^^^ / vvv intrinsics unavailable vvv
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline _LIBCPP_ALWAYS_INLINE uint64_t __mulShiftAll(uint64_t __m, const uint64_t* const __mul, const int32_t __j,
- uint64_t* const __vp, uint64_t* const __vm, const uint32_t __mmShift) { // TRANSITION, VSO-634761
- __m <<= 1;
- // __m is maximum 55 bits
- uint64_t __tmp;
- const uint64_t __lo = __ryu_umul128(__m, __mul[0], &__tmp);
- uint64_t __hi;
- const uint64_t __mid = __tmp + __ryu_umul128(__m, __mul[1], &__hi);
- __hi += __mid < __tmp; // overflow into __hi
-
- const uint64_t __lo2 = __lo + __mul[0];
- const uint64_t __mid2 = __mid + __mul[1] + (__lo2 < __lo);
- const uint64_t __hi2 = __hi + (__mid2 < __mid);
- *__vp = __ryu_shiftright128(__mid2, __hi2, static_cast<uint32_t>(__j - 64 - 1));
-
- if (__mmShift == 1) {
- const uint64_t __lo3 = __lo - __mul[0];
- const uint64_t __mid3 = __mid - __mul[1] - (__lo3 > __lo);
- const uint64_t __hi3 = __hi - (__mid3 > __mid);
- *__vm = __ryu_shiftright128(__mid3, __hi3, static_cast<uint32_t>(__j - 64 - 1));
- } else {
- const uint64_t __lo3 = __lo + __lo;
- const uint64_t __mid3 = __mid + __mid + (__lo3 < __lo);
- const uint64_t __hi3 = __hi + __hi + (__mid3 < __mid);
- const uint64_t __lo4 = __lo3 - __mul[0];
- const uint64_t __mid4 = __mid3 - __mul[1] - (__lo4 > __lo3);
- const uint64_t __hi4 = __hi3 - (__mid4 > __mid3);
- *__vm = __ryu_shiftright128(__mid4, __hi4, static_cast<uint32_t>(__j - 64));
- }
-
- return __ryu_shiftright128(__mid, __hi, static_cast<uint32_t>(__j - 64 - 1));
-}
-
-#endif // ^^^ intrinsics unavailable ^^^
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __decimalLength17(const uint64_t __v) {
- // This is slightly faster than a loop.
- // The average output length is 16.38 digits, so we check high-to-low.
- // Function precondition: __v is not an 18, 19, or 20-digit number.
- // (17 digits are sufficient for round-tripping.)
- _LIBCPP_ASSERT(__v < 100000000000000000u, "");
- if (__v >= 10000000000000000u) { return 17; }
- if (__v >= 1000000000000000u) { return 16; }
- if (__v >= 100000000000000u) { return 15; }
- if (__v >= 10000000000000u) { return 14; }
- if (__v >= 1000000000000u) { return 13; }
- if (__v >= 100000000000u) { return 12; }
- if (__v >= 10000000000u) { return 11; }
- if (__v >= 1000000000u) { return 10; }
- if (__v >= 100000000u) { return 9; }
- if (__v >= 10000000u) { return 8; }
- if (__v >= 1000000u) { return 7; }
- if (__v >= 100000u) { return 6; }
- if (__v >= 10000u) { return 5; }
- if (__v >= 1000u) { return 4; }
- if (__v >= 100u) { return 3; }
- if (__v >= 10u) { return 2; }
- return 1;
-}
-
-// A floating decimal representing m * 10^e.
-struct __floating_decimal_64 {
- uint64_t __mantissa;
- int32_t __exponent;
-};
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline __floating_decimal_64 __d2d(const uint64_t __ieeeMantissa, const uint32_t __ieeeExponent) {
- int32_t __e2;
- uint64_t __m2;
- if (__ieeeExponent == 0) {
- // We subtract 2 so that the bounds computation has 2 additional bits.
- __e2 = 1 - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS - 2;
- __m2 = __ieeeMantissa;
- } else {
- __e2 = static_cast<int32_t>(__ieeeExponent) - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS - 2;
- __m2 = (1ull << __DOUBLE_MANTISSA_BITS) | __ieeeMantissa;
- }
- const bool __even = (__m2 & 1) == 0;
- const bool __acceptBounds = __even;
-
- // Step 2: Determine the interval of valid decimal representations.
- const uint64_t __mv = 4 * __m2;
- // Implicit bool -> int conversion. True is 1, false is 0.
- const uint32_t __mmShift = __ieeeMantissa != 0 || __ieeeExponent <= 1;
- // We would compute __mp and __mm like this:
- // uint64_t __mp = 4 * __m2 + 2;
- // uint64_t __mm = __mv - 1 - __mmShift;
-
- // Step 3: Convert to a decimal power base using 128-bit arithmetic.
- uint64_t __vr, __vp, __vm;
- int32_t __e10;
- bool __vmIsTrailingZeros = false;
- bool __vrIsTrailingZeros = false;
- if (__e2 >= 0) {
- // I tried special-casing __q == 0, but there was no effect on performance.
- // This expression is slightly faster than max(0, __log10Pow2(__e2) - 1).
- const uint32_t __q = __log10Pow2(__e2) - (__e2 > 3);
- __e10 = static_cast<int32_t>(__q);
- const int32_t __k = __DOUBLE_POW5_INV_BITCOUNT + __pow5bits(static_cast<int32_t>(__q)) - 1;
- const int32_t __i = -__e2 + static_cast<int32_t>(__q) + __k;
- __vr = __mulShiftAll(__m2, __DOUBLE_POW5_INV_SPLIT[__q], __i, &__vp, &__vm, __mmShift);
- if (__q <= 21) {
- // This should use __q <= 22, but I think 21 is also safe. Smaller values
- // may still be safe, but it's more difficult to reason about them.
- // Only one of __mp, __mv, and __mm can be a multiple of 5, if any.
- const uint32_t __mvMod5 = static_cast<uint32_t>(__mv) - 5 * static_cast<uint32_t>(__div5(__mv));
- if (__mvMod5 == 0) {
- __vrIsTrailingZeros = __multipleOfPowerOf5(__mv, __q);
- } else if (__acceptBounds) {
- // Same as min(__e2 + (~__mm & 1), __pow5Factor(__mm)) >= __q
- // <=> __e2 + (~__mm & 1) >= __q && __pow5Factor(__mm) >= __q
- // <=> true && __pow5Factor(__mm) >= __q, since __e2 >= __q.
- __vmIsTrailingZeros = __multipleOfPowerOf5(__mv - 1 - __mmShift, __q);
- } else {
- // Same as min(__e2 + 1, __pow5Factor(__mp)) >= __q.
- __vp -= __multipleOfPowerOf5(__mv + 2, __q);
- }
- }
- } else {
- // This expression is slightly faster than max(0, __log10Pow5(-__e2) - 1).
- const uint32_t __q = __log10Pow5(-__e2) - (-__e2 > 1);
- __e10 = static_cast<int32_t>(__q) + __e2;
- const int32_t __i = -__e2 - static_cast<int32_t>(__q);
- const int32_t __k = __pow5bits(__i) - __DOUBLE_POW5_BITCOUNT;
- const int32_t __j = static_cast<int32_t>(__q) - __k;
- __vr = __mulShiftAll(__m2, __DOUBLE_POW5_SPLIT[__i], __j, &__vp, &__vm, __mmShift);
- if (__q <= 1) {
- // {__vr,__vp,__vm} is trailing zeros if {__mv,__mp,__mm} has at least __q trailing 0 bits.
- // __mv = 4 * __m2, so it always has at least two trailing 0 bits.
- __vrIsTrailingZeros = true;
- if (__acceptBounds) {
- // __mm = __mv - 1 - __mmShift, so it has 1 trailing 0 bit iff __mmShift == 1.
- __vmIsTrailingZeros = __mmShift == 1;
- } else {
- // __mp = __mv + 2, so it always has at least one trailing 0 bit.
- --__vp;
- }
- } else if (__q < 63) { // TRANSITION(ulfjack): Use a tighter bound here.
- // We need to compute min(ntz(__mv), __pow5Factor(__mv) - __e2) >= __q - 1
- // <=> ntz(__mv) >= __q - 1 && __pow5Factor(__mv) - __e2 >= __q - 1
- // <=> ntz(__mv) >= __q - 1 (__e2 is negative and -__e2 >= __q)
- // <=> (__mv & ((1 << (__q - 1)) - 1)) == 0
- // We also need to make sure that the left shift does not overflow.
- __vrIsTrailingZeros = __multipleOfPowerOf2(__mv, __q - 1);
- }
- }
-
- // Step 4: Find the shortest decimal representation in the interval of valid representations.
- int32_t __removed = 0;
- uint8_t __lastRemovedDigit = 0;
- uint64_t _Output;
- // On average, we remove ~2 digits.
- if (__vmIsTrailingZeros || __vrIsTrailingZeros) {
- // General case, which happens rarely (~0.7%).
- for (;;) {
- const uint64_t __vpDiv10 = __div10(__vp);
- const uint64_t __vmDiv10 = __div10(__vm);
- if (__vpDiv10 <= __vmDiv10) {
- break;
- }
- const uint32_t __vmMod10 = static_cast<uint32_t>(__vm) - 10 * static_cast<uint32_t>(__vmDiv10);
- const uint64_t __vrDiv10 = __div10(__vr);
- const uint32_t __vrMod10 = static_cast<uint32_t>(__vr) - 10 * static_cast<uint32_t>(__vrDiv10);
- __vmIsTrailingZeros &= __vmMod10 == 0;
- __vrIsTrailingZeros &= __lastRemovedDigit == 0;
- __lastRemovedDigit = static_cast<uint8_t>(__vrMod10);
- __vr = __vrDiv10;
- __vp = __vpDiv10;
- __vm = __vmDiv10;
- ++__removed;
- }
- if (__vmIsTrailingZeros) {
- for (;;) {
- const uint64_t __vmDiv10 = __div10(__vm);
- const uint32_t __vmMod10 = static_cast<uint32_t>(__vm) - 10 * static_cast<uint32_t>(__vmDiv10);
- if (__vmMod10 != 0) {
- break;
- }
- const uint64_t __vpDiv10 = __div10(__vp);
- const uint64_t __vrDiv10 = __div10(__vr);
- const uint32_t __vrMod10 = static_cast<uint32_t>(__vr) - 10 * static_cast<uint32_t>(__vrDiv10);
- __vrIsTrailingZeros &= __lastRemovedDigit == 0;
- __lastRemovedDigit = static_cast<uint8_t>(__vrMod10);
- __vr = __vrDiv10;
- __vp = __vpDiv10;
- __vm = __vmDiv10;
- ++__removed;
- }
- }
- if (__vrIsTrailingZeros && __lastRemovedDigit == 5 && __vr % 2 == 0) {
- // Round even if the exact number is .....50..0.
- __lastRemovedDigit = 4;
- }
- // We need to take __vr + 1 if __vr is outside bounds or we need to round up.
- _Output = __vr + ((__vr == __vm && (!__acceptBounds || !__vmIsTrailingZeros)) || __lastRemovedDigit >= 5);
- } else {
- // Specialized for the common case (~99.3%). Percentages below are relative to this.
- bool __roundUp = false;
- const uint64_t __vpDiv100 = __div100(__vp);
- const uint64_t __vmDiv100 = __div100(__vm);
- if (__vpDiv100 > __vmDiv100) { // Optimization: remove two digits at a time (~86.2%).
- const uint64_t __vrDiv100 = __div100(__vr);
- const uint32_t __vrMod100 = static_cast<uint32_t>(__vr) - 100 * static_cast<uint32_t>(__vrDiv100);
- __roundUp = __vrMod100 >= 50;
- __vr = __vrDiv100;
- __vp = __vpDiv100;
- __vm = __vmDiv100;
- __removed += 2;
- }
- // Loop iterations below (approximately), without optimization above:
- // 0: 0.03%, 1: 13.8%, 2: 70.6%, 3: 14.0%, 4: 1.40%, 5: 0.14%, 6+: 0.02%
- // Loop iterations below (approximately), with optimization above:
- // 0: 70.6%, 1: 27.8%, 2: 1.40%, 3: 0.14%, 4+: 0.02%
- for (;;) {
- const uint64_t __vpDiv10 = __div10(__vp);
- const uint64_t __vmDiv10 = __div10(__vm);
- if (__vpDiv10 <= __vmDiv10) {
- break;
- }
- const uint64_t __vrDiv10 = __div10(__vr);
- const uint32_t __vrMod10 = static_cast<uint32_t>(__vr) - 10 * static_cast<uint32_t>(__vrDiv10);
- __roundUp = __vrMod10 >= 5;
- __vr = __vrDiv10;
- __vp = __vpDiv10;
- __vm = __vmDiv10;
- ++__removed;
- }
- // We need to take __vr + 1 if __vr is outside bounds or we need to round up.
- _Output = __vr + (__vr == __vm || __roundUp);
- }
- const int32_t __exp = __e10 + __removed;
-
- __floating_decimal_64 __fd;
- __fd.__exponent = __exp;
- __fd.__mantissa = _Output;
- return __fd;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline to_chars_result __to_chars(char* const _First, char* const _Last, const __floating_decimal_64 __v,
- chars_format _Fmt, const double __f) {
- // Step 5: Print the decimal representation.
- uint64_t _Output = __v.__mantissa;
- int32_t _Ryu_exponent = __v.__exponent;
- const uint32_t __olength = __decimalLength17(_Output);
- int32_t _Scientific_exponent = _Ryu_exponent + static_cast<int32_t>(__olength) - 1;
-
- if (_Fmt == chars_format{}) {
- int32_t _Lower;
- int32_t _Upper;
-
- if (__olength == 1) {
- // Value | Fixed | Scientific
- // 1e-3 | "0.001" | "1e-03"
- // 1e4 | "10000" | "1e+04"
- _Lower = -3;
- _Upper = 4;
- } else {
- // Value | Fixed | Scientific
- // 1234e-7 | "0.0001234" | "1.234e-04"
- // 1234e5 | "123400000" | "1.234e+08"
- _Lower = -static_cast<int32_t>(__olength + 3);
- _Upper = 5;
- }
-
- if (_Lower <= _Ryu_exponent && _Ryu_exponent <= _Upper) {
- _Fmt = chars_format::fixed;
- } else {
- _Fmt = chars_format::scientific;
- }
- } else if (_Fmt == chars_format::general) {
- // C11 7.21.6.1 "The fprintf function"/8:
- // "Let P equal [...] 6 if the precision is omitted [...].
- // Then, if a conversion with style E would have an exponent of X:
- // - if P > X >= -4, the conversion is with style f [...].
- // - otherwise, the conversion is with style e [...]."
- if (-4 <= _Scientific_exponent && _Scientific_exponent < 6) {
- _Fmt = chars_format::fixed;
- } else {
- _Fmt = chars_format::scientific;
- }
- }
-
- if (_Fmt == chars_format::fixed) {
- // Example: _Output == 1729, __olength == 4
-
- // _Ryu_exponent | Printed | _Whole_digits | _Total_fixed_length | Notes
- // --------------|----------|---------------|----------------------|---------------------------------------
- // 2 | 172900 | 6 | _Whole_digits | Ryu can't be used for printing
- // 1 | 17290 | 5 | (sometimes adjusted) | when the trimmed digits are nonzero.
- // --------------|----------|---------------|----------------------|---------------------------------------
- // 0 | 1729 | 4 | _Whole_digits | Unified length cases.
- // --------------|----------|---------------|----------------------|---------------------------------------
- // -1 | 172.9 | 3 | __olength + 1 | This case can't happen for
- // -2 | 17.29 | 2 | | __olength == 1, but no additional
- // -3 | 1.729 | 1 | | code is needed to avoid it.
- // --------------|----------|---------------|----------------------|---------------------------------------
- // -4 | 0.1729 | 0 | 2 - _Ryu_exponent | C11 7.21.6.1 "The fprintf function"/8:
- // -5 | 0.01729 | -1 | | "If a decimal-point character appears,
- // -6 | 0.001729 | -2 | | at least one digit appears before it."
-
- const int32_t _Whole_digits = static_cast<int32_t>(__olength) + _Ryu_exponent;
-
- uint32_t _Total_fixed_length;
- if (_Ryu_exponent >= 0) { // cases "172900" and "1729"
- _Total_fixed_length = static_cast<uint32_t>(_Whole_digits);
- if (_Output == 1) {
- // Rounding can affect the number of digits.
- // For example, 1e23 is exactly "99999999999999991611392" which is 23 digits instead of 24.
- // We can use a lookup table to detect this and adjust the total length.
- static constexpr uint8_t _Adjustment[309] = {
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1,1,0,1,0,1,1,1,0,1,1,1,0,0,0,0,0,
- 1,1,0,0,1,0,1,1,1,0,0,0,0,1,1,1,1,0,0,0,1,1,1,1,0,0,0,1,1,1,1,0,1,0,1,0,1,1,0,0,0,0,1,1,1,
- 1,0,0,0,0,0,0,0,1,1,0,1,1,0,0,1,0,1,0,1,0,1,1,0,0,0,0,0,1,1,1,0,0,1,1,1,1,1,0,1,0,1,1,0,1,
- 1,0,0,0,0,0,0,0,0,0,1,1,1,0,0,1,0,0,1,0,0,1,1,1,1,0,0,1,1,0,1,1,0,1,1,0,1,0,0,0,1,0,0,0,1,
- 0,1,0,1,0,1,1,1,0,0,0,0,0,0,1,1,1,1,0,0,1,0,1,1,1,0,0,0,1,0,1,1,1,1,1,1,0,1,0,1,1,0,0,0,1,
- 1,1,0,1,1,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,1,0,1,1,0,0,1,1,1,0,0,0,1,0,1,0,0,0,0,0,1,1,0,
- 0,1,0,1,1,1,0,0,1,0,0,0,0,1,0,1,0,0,0,0,0,1,0,1,0,1,1,0,1,0,0,0,0,0,1,1,0,1,0 };
- _Total_fixed_length -= _Adjustment[_Ryu_exponent];
- // _Whole_digits doesn't need to be adjusted because these cases won't refer to it later.
- }
- } else if (_Whole_digits > 0) { // case "17.29"
- _Total_fixed_length = __olength + 1;
- } else { // case "0.001729"
- _Total_fixed_length = static_cast<uint32_t>(2 - _Ryu_exponent);
- }
-
- if (_Last - _First < static_cast<ptrdiff_t>(_Total_fixed_length)) {
- return { _Last, errc::value_too_large };
- }
-
- char* _Mid;
- if (_Ryu_exponent > 0) { // case "172900"
- bool _Can_use_ryu;
-
- if (_Ryu_exponent > 22) { // 10^22 is the largest power of 10 that's exactly representable as a double.
- _Can_use_ryu = false;
- } else {
- // Ryu generated X: __v.__mantissa * 10^_Ryu_exponent
- // __v.__mantissa == 2^_Trailing_zero_bits * (__v.__mantissa >> _Trailing_zero_bits)
- // 10^_Ryu_exponent == 2^_Ryu_exponent * 5^_Ryu_exponent
-
- // _Trailing_zero_bits is [0, 56] (aside: because 2^56 is the largest power of 2
- // with 17 decimal digits, which is double's round-trip limit.)
- // _Ryu_exponent is [1, 22].
- // Normalization adds [2, 52] (aside: at least 2 because the pre-normalized mantissa is at least 5).
- // This adds up to [3, 130], which is well below double's maximum binary exponent 1023.
-
- // Therefore, we just need to consider (__v.__mantissa >> _Trailing_zero_bits) * 5^_Ryu_exponent.
-
- // If that product would exceed 53 bits, then X can't be exactly represented as a double.
- // (That's not a problem for round-tripping, because X is close enough to the original double,
- // but X isn't mathematically equal to the original double.) This requires a high-precision fallback.
-
- // If the product is 53 bits or smaller, then X can be exactly represented as a double (and we don't
- // need to re-synthesize it; the original double must have been X, because Ryu wouldn't produce the
- // same output for two different doubles X and Y). This allows Ryu's output to be used (zero-filled).
-
- // (2^53 - 1) / 5^0 (for indexing), (2^53 - 1) / 5^1, ..., (2^53 - 1) / 5^22
- static constexpr uint64_t _Max_shifted_mantissa[23] = {
- 9007199254740991u, 1801439850948198u, 360287970189639u, 72057594037927u, 14411518807585u,
- 2882303761517u, 576460752303u, 115292150460u, 23058430092u, 4611686018u, 922337203u, 184467440u,
- 36893488u, 7378697u, 1475739u, 295147u, 59029u, 11805u, 2361u, 472u, 94u, 18u, 3u };
-
- unsigned long _Trailing_zero_bits;
-#ifdef _LIBCPP_HAS_BITSCAN64
- (void) _BitScanForward64(&_Trailing_zero_bits, __v.__mantissa); // __v.__mantissa is guaranteed nonzero
-#else // ^^^ 64-bit ^^^ / vvv 32-bit vvv
- const uint32_t _Low_mantissa = static_cast<uint32_t>(__v.__mantissa);
- if (_Low_mantissa != 0) {
- (void) _BitScanForward(&_Trailing_zero_bits, _Low_mantissa);
- } else {
- const uint32_t _High_mantissa = static_cast<uint32_t>(__v.__mantissa >> 32); // nonzero here
- (void) _BitScanForward(&_Trailing_zero_bits, _High_mantissa);
- _Trailing_zero_bits += 32;
- }
-#endif // ^^^ 32-bit ^^^
- const uint64_t _Shifted_mantissa = __v.__mantissa >> _Trailing_zero_bits;
- _Can_use_ryu = _Shifted_mantissa <= _Max_shifted_mantissa[_Ryu_exponent];
- }
-
- if (!_Can_use_ryu) {
- // Print the integer exactly.
- // Performance note: This will redundantly perform bounds checking.
- // Performance note: This will redundantly decompose the IEEE representation.
- return __d2fixed_buffered_n(_First, _Last, __f, 0);
- }
-
- // _Can_use_ryu
- // Print the decimal digits, left-aligned within [_First, _First + _Total_fixed_length).
- _Mid = _First + __olength;
- } else { // cases "1729", "17.29", and "0.001729"
- // Print the decimal digits, right-aligned within [_First, _First + _Total_fixed_length).
- _Mid = _First + _Total_fixed_length;
- }
-
- // We prefer 32-bit operations, even on 64-bit platforms.
- // We have at most 17 digits, and uint32_t can store 9 digits.
- // If _Output doesn't fit into uint32_t, we cut off 8 digits,
- // so the rest will fit into uint32_t.
- if ((_Output >> 32) != 0) {
- // Expensive 64-bit division.
- const uint64_t __q = __div1e8(_Output);
- uint32_t __output2 = static_cast<uint32_t>(_Output - 100000000 * __q);
- _Output = __q;
-
- const uint32_t __c = __output2 % 10000;
- __output2 /= 10000;
- const uint32_t __d = __output2 % 10000;
- const uint32_t __c0 = (__c % 100) << 1;
- const uint32_t __c1 = (__c / 100) << 1;
- const uint32_t __d0 = (__d % 100) << 1;
- const uint32_t __d1 = (__d / 100) << 1;
-
- _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c0, 2);
- _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c1, 2);
- _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __d0, 2);
- _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __d1, 2);
- }
- uint32_t __output2 = static_cast<uint32_t>(_Output);
- while (__output2 >= 10000) {
-#ifdef __clang__ // TRANSITION, LLVM-38217
- const uint32_t __c = __output2 - 10000 * (__output2 / 10000);
-#else
- const uint32_t __c = __output2 % 10000;
-#endif
- __output2 /= 10000;
- const uint32_t __c0 = (__c % 100) << 1;
- const uint32_t __c1 = (__c / 100) << 1;
- _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c0, 2);
- _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c1, 2);
- }
- if (__output2 >= 100) {
- const uint32_t __c = (__output2 % 100) << 1;
- __output2 /= 100;
- _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c, 2);
- }
- if (__output2 >= 10) {
- const uint32_t __c = __output2 << 1;
- _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c, 2);
- } else {
- *--_Mid = static_cast<char>('0' + __output2);
- }
-
- if (_Ryu_exponent > 0) { // case "172900" with _Can_use_ryu
- // Performance note: it might be more efficient to do this immediately after setting _Mid.
- _VSTD::memset(_First + __olength, '0', static_cast<size_t>(_Ryu_exponent));
- } else if (_Ryu_exponent == 0) { // case "1729"
- // Done!
- } else if (_Whole_digits > 0) { // case "17.29"
- // Performance note: moving digits might not be optimal.
- _VSTD::memmove(_First, _First + 1, static_cast<size_t>(_Whole_digits));
- _First[_Whole_digits] = '.';
- } else { // case "0.001729"
- // Performance note: a larger memset() followed by overwriting '.' might be more efficient.
- _First[0] = '0';
- _First[1] = '.';
- _VSTD::memset(_First + 2, '0', static_cast<size_t>(-_Whole_digits));
- }
-
- return { _First + _Total_fixed_length, errc{} };
- }
-
- const uint32_t _Total_scientific_length = __olength + (__olength > 1) // digits + possible decimal point
- + (-100 < _Scientific_exponent && _Scientific_exponent < 100 ? 4 : 5); // + scientific exponent
- if (_Last - _First < static_cast<ptrdiff_t>(_Total_scientific_length)) {
- return { _Last, errc::value_too_large };
- }
- char* const __result = _First;
-
- // Print the decimal digits.
- uint32_t __i = 0;
- // We prefer 32-bit operations, even on 64-bit platforms.
- // We have at most 17 digits, and uint32_t can store 9 digits.
- // If _Output doesn't fit into uint32_t, we cut off 8 digits,
- // so the rest will fit into uint32_t.
- if ((_Output >> 32) != 0) {
- // Expensive 64-bit division.
- const uint64_t __q = __div1e8(_Output);
- uint32_t __output2 = static_cast<uint32_t>(_Output) - 100000000 * static_cast<uint32_t>(__q);
- _Output = __q;
-
- const uint32_t __c = __output2 % 10000;
- __output2 /= 10000;
- const uint32_t __d = __output2 % 10000;
- const uint32_t __c0 = (__c % 100) << 1;
- const uint32_t __c1 = (__c / 100) << 1;
- const uint32_t __d0 = (__d % 100) << 1;
- const uint32_t __d1 = (__d / 100) << 1;
- _VSTD::memcpy(__result + __olength - __i - 1, __DIGIT_TABLE + __c0, 2);
- _VSTD::memcpy(__result + __olength - __i - 3, __DIGIT_TABLE + __c1, 2);
- _VSTD::memcpy(__result + __olength - __i - 5, __DIGIT_TABLE + __d0, 2);
- _VSTD::memcpy(__result + __olength - __i - 7, __DIGIT_TABLE + __d1, 2);
- __i += 8;
- }
- uint32_t __output2 = static_cast<uint32_t>(_Output);
- while (__output2 >= 10000) {
-#ifdef __clang__ // TRANSITION, LLVM-38217
- const uint32_t __c = __output2 - 10000 * (__output2 / 10000);
-#else
- const uint32_t __c = __output2 % 10000;
-#endif
- __output2 /= 10000;
- const uint32_t __c0 = (__c % 100) << 1;
- const uint32_t __c1 = (__c / 100) << 1;
- _VSTD::memcpy(__result + __olength - __i - 1, __DIGIT_TABLE + __c0, 2);
- _VSTD::memcpy(__result + __olength - __i - 3, __DIGIT_TABLE + __c1, 2);
- __i += 4;
- }
- if (__output2 >= 100) {
- const uint32_t __c = (__output2 % 100) << 1;
- __output2 /= 100;
- _VSTD::memcpy(__result + __olength - __i - 1, __DIGIT_TABLE + __c, 2);
- __i += 2;
- }
- if (__output2 >= 10) {
- const uint32_t __c = __output2 << 1;
- // We can't use memcpy here: the decimal dot goes between these two digits.
- __result[2] = __DIGIT_TABLE[__c + 1];
- __result[0] = __DIGIT_TABLE[__c];
- } else {
- __result[0] = static_cast<char>('0' + __output2);
- }
-
- // Print decimal point if needed.
- uint32_t __index;
- if (__olength > 1) {
- __result[1] = '.';
- __index = __olength + 1;
- } else {
- __index = 1;
- }
-
- // Print the exponent.
- __result[__index++] = 'e';
- if (_Scientific_exponent < 0) {
- __result[__index++] = '-';
- _Scientific_exponent = -_Scientific_exponent;
- } else {
- __result[__index++] = '+';
- }
-
- if (_Scientific_exponent >= 100) {
- const int32_t __c = _Scientific_exponent % 10;
- _VSTD::memcpy(__result + __index, __DIGIT_TABLE + 2 * (_Scientific_exponent / 10), 2);
- __result[__index + 2] = static_cast<char>('0' + __c);
- __index += 3;
- } else {
- _VSTD::memcpy(__result + __index, __DIGIT_TABLE + 2 * _Scientific_exponent, 2);
- __index += 2;
- }
-
- return { _First + _Total_scientific_length, errc{} };
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline bool __d2d_small_int(const uint64_t __ieeeMantissa, const uint32_t __ieeeExponent,
- __floating_decimal_64* const __v) {
- const uint64_t __m2 = (1ull << __DOUBLE_MANTISSA_BITS) | __ieeeMantissa;
- const int32_t __e2 = static_cast<int32_t>(__ieeeExponent) - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS;
-
- if (__e2 > 0) {
- // f = __m2 * 2^__e2 >= 2^53 is an integer.
- // Ignore this case for now.
- return false;
- }
-
- if (__e2 < -52) {
- // f < 1.
- return false;
- }
-
- // Since 2^52 <= __m2 < 2^53 and 0 <= -__e2 <= 52: 1 <= f = __m2 / 2^-__e2 < 2^53.
- // Test if the lower -__e2 bits of the significand are 0, i.e. whether the fraction is 0.
- const uint64_t __mask = (1ull << -__e2) - 1;
- const uint64_t __fraction = __m2 & __mask;
- if (__fraction != 0) {
- return false;
- }
-
- // f is an integer in the range [1, 2^53).
- // Note: __mantissa might contain trailing (decimal) 0's.
- // Note: since 2^53 < 10^16, there is no need to adjust __decimalLength17().
- __v->__mantissa = __m2 >> -__e2;
- __v->__exponent = 0;
- return true;
-}
-
-[[nodiscard]] to_chars_result __d2s_buffered_n(char* const _First, char* const _Last, const double __f,
- const chars_format _Fmt) {
-
- // Step 1: Decode the floating-point number, and unify normalized and subnormal cases.
- const uint64_t __bits = __double_to_bits(__f);
-
- // Case distinction; exit early for the easy cases.
- if (__bits == 0) {
- if (_Fmt == chars_format::scientific) {
- if (_Last - _First < 5) {
- return { _Last, errc::value_too_large };
- }
-
- _VSTD::memcpy(_First, "0e+00", 5);
-
- return { _First + 5, errc{} };
- }
-
- // Print "0" for chars_format::fixed, chars_format::general, and chars_format{}.
- if (_First == _Last) {
- return { _Last, errc::value_too_large };
- }
-
- *_First = '0';
-
- return { _First + 1, errc{} };
- }
-
- // Decode __bits into mantissa and exponent.
- const uint64_t __ieeeMantissa = __bits & ((1ull << __DOUBLE_MANTISSA_BITS) - 1);
- const uint32_t __ieeeExponent = static_cast<uint32_t>(__bits >> __DOUBLE_MANTISSA_BITS);
-
- if (_Fmt == chars_format::fixed) {
- // const uint64_t _Mantissa2 = __ieeeMantissa | (1ull << __DOUBLE_MANTISSA_BITS); // restore implicit bit
- const int32_t _Exponent2 = static_cast<int32_t>(__ieeeExponent)
- - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS; // bias and normalization
-
- // Normal values are equal to _Mantissa2 * 2^_Exponent2.
- // (Subnormals are different, but they'll be rejected by the _Exponent2 test here, so they can be ignored.)
-
- // For nonzero integers, _Exponent2 >= -52. (The minimum value occurs when _Mantissa2 * 2^_Exponent2 is 1.
- // In that case, _Mantissa2 is the implicit 1 bit followed by 52 zeros, so _Exponent2 is -52 to shift away
- // the zeros.) The dense range of exactly representable integers has negative or zero exponents
- // (as positive exponents make the range non-dense). For that dense range, Ryu will always be used:
- // every digit is necessary to uniquely identify the value, so Ryu must print them all.
-
- // Positive exponents are the non-dense range of exactly representable integers. This contains all of the values
- // for which Ryu can't be used (and a few Ryu-friendly values). We can save time by detecting positive
- // exponents here and skipping Ryu. Calling __d2fixed_buffered_n() with precision 0 is valid for all integers
- // (so it's okay if we call it with a Ryu-friendly value).
- if (_Exponent2 > 0) {
- return __d2fixed_buffered_n(_First, _Last, __f, 0);
- }
- }
-
- __floating_decimal_64 __v;
- const bool __isSmallInt = __d2d_small_int(__ieeeMantissa, __ieeeExponent, &__v);
- if (__isSmallInt) {
- // For small integers in the range [1, 2^53), __v.__mantissa might contain trailing (decimal) zeros.
- // For scientific notation we need to move these zeros into the exponent.
- // (This is not needed for fixed-point notation, so it might be beneficial to trim
- // trailing zeros in __to_chars only if needed - once fixed-point notation output is implemented.)
- for (;;) {
- const uint64_t __q = __div10(__v.__mantissa);
- const uint32_t __r = static_cast<uint32_t>(__v.__mantissa) - 10 * static_cast<uint32_t>(__q);
- if (__r != 0) {
- break;
- }
- __v.__mantissa = __q;
- ++__v.__exponent;
- }
- } else {
- __v = __d2d(__ieeeMantissa, __ieeeExponent);
- }
-
- return __to_chars(_First, _Last, __v, _Fmt, __f);
-}
-
-_LIBCPP_END_NAMESPACE_STD
-
-// clang-format on
diff --git a/src/ryu/f2s.cpp b/src/ryu/f2s.cpp
deleted file mode 100644
index 7e10b49..0000000
--- a/src/ryu/f2s.cpp
+++ /dev/null
@@ -1,715 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Copyright (c) Microsoft Corporation.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-// Copyright 2018 Ulf Adams
-// Copyright (c) Microsoft Corporation. All rights reserved.
-
-// Boost Software License - Version 1.0 - August 17th, 2003
-
-// Permission is hereby granted, free of charge, to any person or organization
-// obtaining a copy of the software and accompanying documentation covered by
-// this license (the "Software") to use, reproduce, display, distribute,
-// execute, and transmit the Software, and to prepare derivative works of the
-// Software, and to permit third-parties to whom the Software is furnished to
-// do so, all subject to the following:
-
-// The copyright notices in the Software and this entire statement, including
-// the above license grant, this restriction and the following disclaimer,
-// must be included in all copies of the Software, in whole or in part, and
-// all derivative works of the Software, unless such copies or derivative
-// works are solely in the form of machine-executable object code generated by
-// a source language processor.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-// Avoid formatting to keep the changes with the original code minimal.
-// clang-format off
-
-#include "__config"
-#include "charconv"
-
-#include "include/ryu/common.h"
-#include "include/ryu/d2fixed.h"
-#include "include/ryu/d2s_intrinsics.h"
-#include "include/ryu/digit_table.h"
-#include "include/ryu/f2s.h"
-#include "include/ryu/ryu.h"
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-inline constexpr int __FLOAT_MANTISSA_BITS = 23;
-inline constexpr int __FLOAT_EXPONENT_BITS = 8;
-inline constexpr int __FLOAT_BIAS = 127;
-
-inline constexpr int __FLOAT_POW5_INV_BITCOUNT = 59;
-inline constexpr uint64_t __FLOAT_POW5_INV_SPLIT[31] = {
- 576460752303423489u, 461168601842738791u, 368934881474191033u, 295147905179352826u,
- 472236648286964522u, 377789318629571618u, 302231454903657294u, 483570327845851670u,
- 386856262276681336u, 309485009821345069u, 495176015714152110u, 396140812571321688u,
- 316912650057057351u, 507060240091291761u, 405648192073033409u, 324518553658426727u,
- 519229685853482763u, 415383748682786211u, 332306998946228969u, 531691198313966350u,
- 425352958651173080u, 340282366920938464u, 544451787073501542u, 435561429658801234u,
- 348449143727040987u, 557518629963265579u, 446014903970612463u, 356811923176489971u,
- 570899077082383953u, 456719261665907162u, 365375409332725730u
-};
-inline constexpr int __FLOAT_POW5_BITCOUNT = 61;
-inline constexpr uint64_t __FLOAT_POW5_SPLIT[47] = {
- 1152921504606846976u, 1441151880758558720u, 1801439850948198400u, 2251799813685248000u,
- 1407374883553280000u, 1759218604441600000u, 2199023255552000000u, 1374389534720000000u,
- 1717986918400000000u, 2147483648000000000u, 1342177280000000000u, 1677721600000000000u,
- 2097152000000000000u, 1310720000000000000u, 1638400000000000000u, 2048000000000000000u,
- 1280000000000000000u, 1600000000000000000u, 2000000000000000000u, 1250000000000000000u,
- 1562500000000000000u, 1953125000000000000u, 1220703125000000000u, 1525878906250000000u,
- 1907348632812500000u, 1192092895507812500u, 1490116119384765625u, 1862645149230957031u,
- 1164153218269348144u, 1455191522836685180u, 1818989403545856475u, 2273736754432320594u,
- 1421085471520200371u, 1776356839400250464u, 2220446049250313080u, 1387778780781445675u,
- 1734723475976807094u, 2168404344971008868u, 1355252715606880542u, 1694065894508600678u,
- 2117582368135750847u, 1323488980084844279u, 1654361225106055349u, 2067951531382569187u,
- 1292469707114105741u, 1615587133892632177u, 2019483917365790221u
-};
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __pow5Factor(uint32_t __value) {
- uint32_t __count = 0;
- for (;;) {
- _LIBCPP_ASSERT(__value != 0, "");
- const uint32_t __q = __value / 5;
- const uint32_t __r = __value % 5;
- if (__r != 0) {
- break;
- }
- __value = __q;
- ++__count;
- }
- return __count;
-}
-
-// Returns true if __value is divisible by 5^__p.
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline bool __multipleOfPowerOf5(const uint32_t __value, const uint32_t __p) {
- return __pow5Factor(__value) >= __p;
-}
-
-// Returns true if __value is divisible by 2^__p.
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline bool __multipleOfPowerOf2(const uint32_t __value, const uint32_t __p) {
- _LIBCPP_ASSERT(__value != 0, "");
- _LIBCPP_ASSERT(__p < 32, "");
- // __builtin_ctz doesn't appear to be faster here.
- return (__value & ((1u << __p) - 1)) == 0;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __mulShift(const uint32_t __m, const uint64_t __factor, const int32_t __shift) {
- _LIBCPP_ASSERT(__shift > 32, "");
-
- // The casts here help MSVC to avoid calls to the __allmul library
- // function.
- const uint32_t __factorLo = static_cast<uint32_t>(__factor);
- const uint32_t __factorHi = static_cast<uint32_t>(__factor >> 32);
- const uint64_t __bits0 = static_cast<uint64_t>(__m) * __factorLo;
- const uint64_t __bits1 = static_cast<uint64_t>(__m) * __factorHi;
-
-#ifndef _LIBCPP_64_BIT
- // On 32-bit platforms we can avoid a 64-bit shift-right since we only
- // need the upper 32 bits of the result and the shift value is > 32.
- const uint32_t __bits0Hi = static_cast<uint32_t>(__bits0 >> 32);
- uint32_t __bits1Lo = static_cast<uint32_t>(__bits1);
- uint32_t __bits1Hi = static_cast<uint32_t>(__bits1 >> 32);
- __bits1Lo += __bits0Hi;
- __bits1Hi += (__bits1Lo < __bits0Hi);
- const int32_t __s = __shift - 32;
- return (__bits1Hi << (32 - __s)) | (__bits1Lo >> __s);
-#else // ^^^ 32-bit ^^^ / vvv 64-bit vvv
- const uint64_t __sum = (__bits0 >> 32) + __bits1;
- const uint64_t __shiftedSum = __sum >> (__shift - 32);
- _LIBCPP_ASSERT(__shiftedSum <= UINT32_MAX, "");
- return static_cast<uint32_t>(__shiftedSum);
-#endif // ^^^ 64-bit ^^^
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __mulPow5InvDivPow2(const uint32_t __m, const uint32_t __q, const int32_t __j) {
- return __mulShift(__m, __FLOAT_POW5_INV_SPLIT[__q], __j);
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __mulPow5divPow2(const uint32_t __m, const uint32_t __i, const int32_t __j) {
- return __mulShift(__m, __FLOAT_POW5_SPLIT[__i], __j);
-}
-
-// A floating decimal representing m * 10^e.
-struct __floating_decimal_32 {
- uint32_t __mantissa;
- int32_t __exponent;
-};
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline __floating_decimal_32 __f2d(const uint32_t __ieeeMantissa, const uint32_t __ieeeExponent) {
- int32_t __e2;
- uint32_t __m2;
- if (__ieeeExponent == 0) {
- // We subtract 2 so that the bounds computation has 2 additional bits.
- __e2 = 1 - __FLOAT_BIAS - __FLOAT_MANTISSA_BITS - 2;
- __m2 = __ieeeMantissa;
- } else {
- __e2 = static_cast<int32_t>(__ieeeExponent) - __FLOAT_BIAS - __FLOAT_MANTISSA_BITS - 2;
- __m2 = (1u << __FLOAT_MANTISSA_BITS) | __ieeeMantissa;
- }
- const bool __even = (__m2 & 1) == 0;
- const bool __acceptBounds = __even;
-
- // Step 2: Determine the interval of valid decimal representations.
- const uint32_t __mv = 4 * __m2;
- const uint32_t __mp = 4 * __m2 + 2;
- // Implicit bool -> int conversion. True is 1, false is 0.
- const uint32_t __mmShift = __ieeeMantissa != 0 || __ieeeExponent <= 1;
- const uint32_t __mm = 4 * __m2 - 1 - __mmShift;
-
- // Step 3: Convert to a decimal power base using 64-bit arithmetic.
- uint32_t __vr, __vp, __vm;
- int32_t __e10;
- bool __vmIsTrailingZeros = false;
- bool __vrIsTrailingZeros = false;
- uint8_t __lastRemovedDigit = 0;
- if (__e2 >= 0) {
- const uint32_t __q = __log10Pow2(__e2);
- __e10 = static_cast<int32_t>(__q);
- const int32_t __k = __FLOAT_POW5_INV_BITCOUNT + __pow5bits(static_cast<int32_t>(__q)) - 1;
- const int32_t __i = -__e2 + static_cast<int32_t>(__q) + __k;
- __vr = __mulPow5InvDivPow2(__mv, __q, __i);
- __vp = __mulPow5InvDivPow2(__mp, __q, __i);
- __vm = __mulPow5InvDivPow2(__mm, __q, __i);
- if (__q != 0 && (__vp - 1) / 10 <= __vm / 10) {
- // We need to know one removed digit even if we are not going to loop below. We could use
- // __q = X - 1 above, except that would require 33 bits for the result, and we've found that
- // 32-bit arithmetic is faster even on 64-bit machines.
- const int32_t __l = __FLOAT_POW5_INV_BITCOUNT + __pow5bits(static_cast<int32_t>(__q - 1)) - 1;
- __lastRemovedDigit = static_cast<uint8_t>(__mulPow5InvDivPow2(__mv, __q - 1,
- -__e2 + static_cast<int32_t>(__q) - 1 + __l) % 10);
- }
- if (__q <= 9) {
- // The largest power of 5 that fits in 24 bits is 5^10, but __q <= 9 seems to be safe as well.
- // Only one of __mp, __mv, and __mm can be a multiple of 5, if any.
- if (__mv % 5 == 0) {
- __vrIsTrailingZeros = __multipleOfPowerOf5(__mv, __q);
- } else if (__acceptBounds) {
- __vmIsTrailingZeros = __multipleOfPowerOf5(__mm, __q);
- } else {
- __vp -= __multipleOfPowerOf5(__mp, __q);
- }
- }
- } else {
- const uint32_t __q = __log10Pow5(-__e2);
- __e10 = static_cast<int32_t>(__q) + __e2;
- const int32_t __i = -__e2 - static_cast<int32_t>(__q);
- const int32_t __k = __pow5bits(__i) - __FLOAT_POW5_BITCOUNT;
- int32_t __j = static_cast<int32_t>(__q) - __k;
- __vr = __mulPow5divPow2(__mv, static_cast<uint32_t>(__i), __j);
- __vp = __mulPow5divPow2(__mp, static_cast<uint32_t>(__i), __j);
- __vm = __mulPow5divPow2(__mm, static_cast<uint32_t>(__i), __j);
- if (__q != 0 && (__vp - 1) / 10 <= __vm / 10) {
- __j = static_cast<int32_t>(__q) - 1 - (__pow5bits(__i + 1) - __FLOAT_POW5_BITCOUNT);
- __lastRemovedDigit = static_cast<uint8_t>(__mulPow5divPow2(__mv, static_cast<uint32_t>(__i + 1), __j) % 10);
- }
- if (__q <= 1) {
- // {__vr,__vp,__vm} is trailing zeros if {__mv,__mp,__mm} has at least __q trailing 0 bits.
- // __mv = 4 * __m2, so it always has at least two trailing 0 bits.
- __vrIsTrailingZeros = true;
- if (__acceptBounds) {
- // __mm = __mv - 1 - __mmShift, so it has 1 trailing 0 bit iff __mmShift == 1.
- __vmIsTrailingZeros = __mmShift == 1;
- } else {
- // __mp = __mv + 2, so it always has at least one trailing 0 bit.
- --__vp;
- }
- } else if (__q < 31) { // TRANSITION(ulfjack): Use a tighter bound here.
- __vrIsTrailingZeros = __multipleOfPowerOf2(__mv, __q - 1);
- }
- }
-
- // Step 4: Find the shortest decimal representation in the interval of valid representations.
- int32_t __removed = 0;
- uint32_t _Output;
- if (__vmIsTrailingZeros || __vrIsTrailingZeros) {
- // General case, which happens rarely (~4.0%).
- while (__vp / 10 > __vm / 10) {
-#ifdef __clang__ // TRANSITION, LLVM-23106
- __vmIsTrailingZeros &= __vm - (__vm / 10) * 10 == 0;
-#else
- __vmIsTrailingZeros &= __vm % 10 == 0;
-#endif
- __vrIsTrailingZeros &= __lastRemovedDigit == 0;
- __lastRemovedDigit = static_cast<uint8_t>(__vr % 10);
- __vr /= 10;
- __vp /= 10;
- __vm /= 10;
- ++__removed;
- }
- if (__vmIsTrailingZeros) {
- while (__vm % 10 == 0) {
- __vrIsTrailingZeros &= __lastRemovedDigit == 0;
- __lastRemovedDigit = static_cast<uint8_t>(__vr % 10);
- __vr /= 10;
- __vp /= 10;
- __vm /= 10;
- ++__removed;
- }
- }
- if (__vrIsTrailingZeros && __lastRemovedDigit == 5 && __vr % 2 == 0) {
- // Round even if the exact number is .....50..0.
- __lastRemovedDigit = 4;
- }
- // We need to take __vr + 1 if __vr is outside bounds or we need to round up.
- _Output = __vr + ((__vr == __vm && (!__acceptBounds || !__vmIsTrailingZeros)) || __lastRemovedDigit >= 5);
- } else {
- // Specialized for the common case (~96.0%). Percentages below are relative to this.
- // Loop iterations below (approximately):
- // 0: 13.6%, 1: 70.7%, 2: 14.1%, 3: 1.39%, 4: 0.14%, 5+: 0.01%
- while (__vp / 10 > __vm / 10) {
- __lastRemovedDigit = static_cast<uint8_t>(__vr % 10);
- __vr /= 10;
- __vp /= 10;
- __vm /= 10;
- ++__removed;
- }
- // We need to take __vr + 1 if __vr is outside bounds or we need to round up.
- _Output = __vr + (__vr == __vm || __lastRemovedDigit >= 5);
- }
- const int32_t __exp = __e10 + __removed;
-
- __floating_decimal_32 __fd;
- __fd.__exponent = __exp;
- __fd.__mantissa = _Output;
- return __fd;
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline to_chars_result _Large_integer_to_chars(char* const _First, char* const _Last,
- const uint32_t _Mantissa2, const int32_t _Exponent2) {
-
- // Print the integer _Mantissa2 * 2^_Exponent2 exactly.
-
- // For nonzero integers, _Exponent2 >= -23. (The minimum value occurs when _Mantissa2 * 2^_Exponent2 is 1.
- // In that case, _Mantissa2 is the implicit 1 bit followed by 23 zeros, so _Exponent2 is -23 to shift away
- // the zeros.) The dense range of exactly representable integers has negative or zero exponents
- // (as positive exponents make the range non-dense). For that dense range, Ryu will always be used:
- // every digit is necessary to uniquely identify the value, so Ryu must print them all.
-
- // Positive exponents are the non-dense range of exactly representable integers.
- // This contains all of the values for which Ryu can't be used (and a few Ryu-friendly values).
-
- // Performance note: Long division appears to be faster than losslessly widening float to double and calling
- // __d2fixed_buffered_n(). If __f2fixed_buffered_n() is implemented, it might be faster than long division.
-
- _LIBCPP_ASSERT(_Exponent2 > 0, "");
- _LIBCPP_ASSERT(_Exponent2 <= 104, ""); // because __ieeeExponent <= 254
-
- // Manually represent _Mantissa2 * 2^_Exponent2 as a large integer. _Mantissa2 is always 24 bits
- // (due to the implicit bit), while _Exponent2 indicates a shift of at most 104 bits.
- // 24 + 104 equals 128 equals 4 * 32, so we need exactly 4 32-bit elements.
- // We use a little-endian representation, visualized like this:
-
- // << left shift <<
- // most significant
- // _Data[3] _Data[2] _Data[1] _Data[0]
- // least significant
- // >> right shift >>
-
- constexpr uint32_t _Data_size = 4;
- uint32_t _Data[_Data_size]{};
-
- // _Maxidx is the index of the most significant nonzero element.
- uint32_t _Maxidx = ((24 + static_cast<uint32_t>(_Exponent2) + 31) / 32) - 1;
- _LIBCPP_ASSERT(_Maxidx < _Data_size, "");
-
- const uint32_t _Bit_shift = static_cast<uint32_t>(_Exponent2) % 32;
- if (_Bit_shift <= 8) { // _Mantissa2's 24 bits don't cross an element boundary
- _Data[_Maxidx] = _Mantissa2 << _Bit_shift;
- } else { // _Mantissa2's 24 bits cross an element boundary
- _Data[_Maxidx - 1] = _Mantissa2 << _Bit_shift;
- _Data[_Maxidx] = _Mantissa2 >> (32 - _Bit_shift);
- }
-
- // If Ryu hasn't determined the total output length, we need to buffer the digits generated from right to left
- // by long division. The largest possible float is: 340'282346638'528859811'704183484'516925440
- uint32_t _Blocks[4];
- int32_t _Filled_blocks = 0;
- // From left to right, we're going to print:
- // _Data[0] will be [1, 10] digits.
- // Then if _Filled_blocks > 0:
- // _Blocks[_Filled_blocks - 1], ..., _Blocks[0] will be 0-filled 9-digit blocks.
-
- if (_Maxidx != 0) { // If the integer is actually large, perform long division.
- // Otherwise, skip to printing _Data[0].
- for (;;) {
- // Loop invariant: _Maxidx != 0 (i.e. the integer is actually large)
-
- const uint32_t _Most_significant_elem = _Data[_Maxidx];
- const uint32_t _Initial_remainder = _Most_significant_elem % 1000000000;
- const uint32_t _Initial_quotient = _Most_significant_elem / 1000000000;
- _Data[_Maxidx] = _Initial_quotient;
- uint64_t _Remainder = _Initial_remainder;
-
- // Process less significant elements.
- uint32_t _Idx = _Maxidx;
- do {
- --_Idx; // Initially, _Remainder is at most 10^9 - 1.
-
- // Now, _Remainder is at most (10^9 - 1) * 2^32 + 2^32 - 1, simplified to 10^9 * 2^32 - 1.
- _Remainder = (_Remainder << 32) | _Data[_Idx];
-
- // floor((10^9 * 2^32 - 1) / 10^9) == 2^32 - 1, so uint32_t _Quotient is lossless.
- const uint32_t _Quotient = static_cast<uint32_t>(__div1e9(_Remainder));
-
- // _Remainder is at most 10^9 - 1 again.
- // For uint32_t truncation, see the __mod1e9() comment in d2s_intrinsics.h.
- _Remainder = static_cast<uint32_t>(_Remainder) - 1000000000u * _Quotient;
-
- _Data[_Idx] = _Quotient;
- } while (_Idx != 0);
-
- // Store a 0-filled 9-digit block.
- _Blocks[_Filled_blocks++] = static_cast<uint32_t>(_Remainder);
-
- if (_Initial_quotient == 0) { // Is the large integer shrinking?
- --_Maxidx; // log2(10^9) is 29.9, so we can't shrink by more than one element.
- if (_Maxidx == 0) {
- break; // We've finished long division. Now we need to print _Data[0].
- }
- }
- }
- }
-
- _LIBCPP_ASSERT(_Data[0] != 0, "");
- for (uint32_t _Idx = 1; _Idx < _Data_size; ++_Idx) {
- _LIBCPP_ASSERT(_Data[_Idx] == 0, "");
- }
-
- const uint32_t _Data_olength = _Data[0] >= 1000000000 ? 10 : __decimalLength9(_Data[0]);
- const uint32_t _Total_fixed_length = _Data_olength + 9 * _Filled_blocks;
-
- if (_Last - _First < static_cast<ptrdiff_t>(_Total_fixed_length)) {
- return { _Last, errc::value_too_large };
- }
-
- char* _Result = _First;
-
- // Print _Data[0]. While it's up to 10 digits,
- // which is more than Ryu generates, the code below can handle this.
- __append_n_digits(_Data_olength, _Data[0], _Result);
- _Result += _Data_olength;
-
- // Print 0-filled 9-digit blocks.
- for (int32_t _Idx = _Filled_blocks - 1; _Idx >= 0; --_Idx) {
- __append_nine_digits(_Blocks[_Idx], _Result);
- _Result += 9;
- }
-
- return { _Result, errc{} };
-}
-
-[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline to_chars_result __to_chars(char* const _First, char* const _Last, const __floating_decimal_32 __v,
- chars_format _Fmt, const uint32_t __ieeeMantissa, const uint32_t __ieeeExponent) {
- // Step 5: Print the decimal representation.
- uint32_t _Output = __v.__mantissa;
- int32_t _Ryu_exponent = __v.__exponent;
- const uint32_t __olength = __decimalLength9(_Output);
- int32_t _Scientific_exponent = _Ryu_exponent + static_cast<int32_t>(__olength) - 1;
-
- if (_Fmt == chars_format{}) {
- int32_t _Lower;
- int32_t _Upper;
-
- if (__olength == 1) {
- // Value | Fixed | Scientific
- // 1e-3 | "0.001" | "1e-03"
- // 1e4 | "10000" | "1e+04"
- _Lower = -3;
- _Upper = 4;
- } else {
- // Value | Fixed | Scientific
- // 1234e-7 | "0.0001234" | "1.234e-04"
- // 1234e5 | "123400000" | "1.234e+08"
- _Lower = -static_cast<int32_t>(__olength + 3);
- _Upper = 5;
- }
-
- if (_Lower <= _Ryu_exponent && _Ryu_exponent <= _Upper) {
- _Fmt = chars_format::fixed;
- } else {
- _Fmt = chars_format::scientific;
- }
- } else if (_Fmt == chars_format::general) {
- // C11 7.21.6.1 "The fprintf function"/8:
- // "Let P equal [...] 6 if the precision is omitted [...].
- // Then, if a conversion with style E would have an exponent of X:
- // - if P > X >= -4, the conversion is with style f [...].
- // - otherwise, the conversion is with style e [...]."
- if (-4 <= _Scientific_exponent && _Scientific_exponent < 6) {
- _Fmt = chars_format::fixed;
- } else {
- _Fmt = chars_format::scientific;
- }
- }
-
- if (_Fmt == chars_format::fixed) {
- // Example: _Output == 1729, __olength == 4
-
- // _Ryu_exponent | Printed | _Whole_digits | _Total_fixed_length | Notes
- // --------------|----------|---------------|----------------------|---------------------------------------
- // 2 | 172900 | 6 | _Whole_digits | Ryu can't be used for printing
- // 1 | 17290 | 5 | (sometimes adjusted) | when the trimmed digits are nonzero.
- // --------------|----------|---------------|----------------------|---------------------------------------
- // 0 | 1729 | 4 | _Whole_digits | Unified length cases.
- // --------------|----------|---------------|----------------------|---------------------------------------
- // -1 | 172.9 | 3 | __olength + 1 | This case can't happen for
- // -2 | 17.29 | 2 | | __olength == 1, but no additional
- // -3 | 1.729 | 1 | | code is needed to avoid it.
- // --------------|----------|---------------|----------------------|---------------------------------------
- // -4 | 0.1729 | 0 | 2 - _Ryu_exponent | C11 7.21.6.1 "The fprintf function"/8:
- // -5 | 0.01729 | -1 | | "If a decimal-point character appears,
- // -6 | 0.001729 | -2 | | at least one digit appears before it."
-
- const int32_t _Whole_digits = static_cast<int32_t>(__olength) + _Ryu_exponent;
-
- uint32_t _Total_fixed_length;
- if (_Ryu_exponent >= 0) { // cases "172900" and "1729"
- _Total_fixed_length = static_cast<uint32_t>(_Whole_digits);
- if (_Output == 1) {
- // Rounding can affect the number of digits.
- // For example, 1e11f is exactly "99999997952" which is 11 digits instead of 12.
- // We can use a lookup table to detect this and adjust the total length.
- static constexpr uint8_t _Adjustment[39] = {
- 0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,1,0,1,1,1,0,0,1,1,0,1,0,1,1,0,0,1,0,1,1,0,1,1,1 };
- _Total_fixed_length -= _Adjustment[_Ryu_exponent];
- // _Whole_digits doesn't need to be adjusted because these cases won't refer to it later.
- }
- } else if (_Whole_digits > 0) { // case "17.29"
- _Total_fixed_length = __olength + 1;
- } else { // case "0.001729"
- _Total_fixed_length = static_cast<uint32_t>(2 - _Ryu_exponent);
- }
-
- if (_Last - _First < static_cast<ptrdiff_t>(_Total_fixed_length)) {
- return { _Last, errc::value_too_large };
- }
-
- char* _Mid;
- if (_Ryu_exponent > 0) { // case "172900"
- bool _Can_use_ryu;
-
- if (_Ryu_exponent > 10) { // 10^10 is the largest power of 10 that's exactly representable as a float.
- _Can_use_ryu = false;
- } else {
- // Ryu generated X: __v.__mantissa * 10^_Ryu_exponent
- // __v.__mantissa == 2^_Trailing_zero_bits * (__v.__mantissa >> _Trailing_zero_bits)
- // 10^_Ryu_exponent == 2^_Ryu_exponent * 5^_Ryu_exponent
-
- // _Trailing_zero_bits is [0, 29] (aside: because 2^29 is the largest power of 2
- // with 9 decimal digits, which is float's round-trip limit.)
- // _Ryu_exponent is [1, 10].
- // Normalization adds [2, 23] (aside: at least 2 because the pre-normalized mantissa is at least 5).
- // This adds up to [3, 62], which is well below float's maximum binary exponent 127.
-
- // Therefore, we just need to consider (__v.__mantissa >> _Trailing_zero_bits) * 5^_Ryu_exponent.
-
- // If that product would exceed 24 bits, then X can't be exactly represented as a float.
- // (That's not a problem for round-tripping, because X is close enough to the original float,
- // but X isn't mathematically equal to the original float.) This requires a high-precision fallback.
-
- // If the product is 24 bits or smaller, then X can be exactly represented as a float (and we don't
- // need to re-synthesize it; the original float must have been X, because Ryu wouldn't produce the
- // same output for two different floats X and Y). This allows Ryu's output to be used (zero-filled).
-
- // (2^24 - 1) / 5^0 (for indexing), (2^24 - 1) / 5^1, ..., (2^24 - 1) / 5^10
- static constexpr uint32_t _Max_shifted_mantissa[11] = {
- 16777215, 3355443, 671088, 134217, 26843, 5368, 1073, 214, 42, 8, 1 };
-
- unsigned long _Trailing_zero_bits;
- (void) _BitScanForward(&_Trailing_zero_bits, __v.__mantissa); // __v.__mantissa is guaranteed nonzero
- const uint32_t _Shifted_mantissa = __v.__mantissa >> _Trailing_zero_bits;
- _Can_use_ryu = _Shifted_mantissa <= _Max_shifted_mantissa[_Ryu_exponent];
- }
-
- if (!_Can_use_ryu) {
- const uint32_t _Mantissa2 = __ieeeMantissa | (1u << __FLOAT_MANTISSA_BITS); // restore implicit bit
- const int32_t _Exponent2 = static_cast<int32_t>(__ieeeExponent)
- - __FLOAT_BIAS - __FLOAT_MANTISSA_BITS; // bias and normalization
-
- // Performance note: We've already called Ryu, so this will redundantly perform buffering and bounds checking.
- return _Large_integer_to_chars(_First, _Last, _Mantissa2, _Exponent2);
- }
-
- // _Can_use_ryu
- // Print the decimal digits, left-aligned within [_First, _First + _Total_fixed_length).
- _Mid = _First + __olength;
- } else { // cases "1729", "17.29", and "0.001729"
- // Print the decimal digits, right-aligned within [_First, _First + _Total_fixed_length).
- _Mid = _First + _Total_fixed_length;
- }
-
- while (_Output >= 10000) {
-#ifdef __clang__ // TRANSITION, LLVM-38217
- const uint32_t __c = _Output - 10000 * (_Output / 10000);
-#else
- const uint32_t __c = _Output % 10000;
-#endif
- _Output /= 10000;
- const uint32_t __c0 = (__c % 100) << 1;
- const uint32_t __c1 = (__c / 100) << 1;
- _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c0, 2);
- _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c1, 2);
- }
- if (_Output >= 100) {
- const uint32_t __c = (_Output % 100) << 1;
- _Output /= 100;
- _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c, 2);
- }
- if (_Output >= 10) {
- const uint32_t __c = _Output << 1;
- _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c, 2);
- } else {
- *--_Mid = static_cast<char>('0' + _Output);
- }
-
- if (_Ryu_exponent > 0) { // case "172900" with _Can_use_ryu
- // Performance note: it might be more efficient to do this immediately after setting _Mid.
- _VSTD::memset(_First + __olength, '0', static_cast<size_t>(_Ryu_exponent));
- } else if (_Ryu_exponent == 0) { // case "1729"
- // Done!
- } else if (_Whole_digits > 0) { // case "17.29"
- // Performance note: moving digits might not be optimal.
- _VSTD::memmove(_First, _First + 1, static_cast<size_t>(_Whole_digits));
- _First[_Whole_digits] = '.';
- } else { // case "0.001729"
- // Performance note: a larger memset() followed by overwriting '.' might be more efficient.
- _First[0] = '0';
- _First[1] = '.';
- _VSTD::memset(_First + 2, '0', static_cast<size_t>(-_Whole_digits));
- }
-
- return { _First + _Total_fixed_length, errc{} };
- }
-
- const uint32_t _Total_scientific_length =
- __olength + (__olength > 1) + 4; // digits + possible decimal point + scientific exponent
- if (_Last - _First < static_cast<ptrdiff_t>(_Total_scientific_length)) {
- return { _Last, errc::value_too_large };
- }
- char* const __result = _First;
-
- // Print the decimal digits.
- uint32_t __i = 0;
- while (_Output >= 10000) {
-#ifdef __clang__ // TRANSITION, LLVM-38217
- const uint32_t __c = _Output - 10000 * (_Output / 10000);
-#else
- const uint32_t __c = _Output % 10000;
-#endif
- _Output /= 10000;
- const uint32_t __c0 = (__c % 100) << 1;
- const uint32_t __c1 = (__c / 100) << 1;
- _VSTD::memcpy(__result + __olength - __i - 1, __DIGIT_TABLE + __c0, 2);
- _VSTD::memcpy(__result + __olength - __i - 3, __DIGIT_TABLE + __c1, 2);
- __i += 4;
- }
- if (_Output >= 100) {
- const uint32_t __c = (_Output % 100) << 1;
- _Output /= 100;
- _VSTD::memcpy(__result + __olength - __i - 1, __DIGIT_TABLE + __c, 2);
- __i += 2;
- }
- if (_Output >= 10) {
- const uint32_t __c = _Output << 1;
- // We can't use memcpy here: the decimal dot goes between these two digits.
- __result[2] = __DIGIT_TABLE[__c + 1];
- __result[0] = __DIGIT_TABLE[__c];
- } else {
- __result[0] = static_cast<char>('0' + _Output);
- }
-
- // Print decimal point if needed.
- uint32_t __index;
- if (__olength > 1) {
- __result[1] = '.';
- __index = __olength + 1;
- } else {
- __index = 1;
- }
-
- // Print the exponent.
- __result[__index++] = 'e';
- if (_Scientific_exponent < 0) {
- __result[__index++] = '-';
- _Scientific_exponent = -_Scientific_exponent;
- } else {
- __result[__index++] = '+';
- }
-
- _VSTD::memcpy(__result + __index, __DIGIT_TABLE + 2 * _Scientific_exponent, 2);
- __index += 2;
-
- return { _First + _Total_scientific_length, errc{} };
-}
-
-[[nodiscard]] to_chars_result __f2s_buffered_n(char* const _First, char* const _Last, const float __f,
- const chars_format _Fmt) {
-
- // Step 1: Decode the floating-point number, and unify normalized and subnormal cases.
- const uint32_t __bits = __float_to_bits(__f);
-
- // Case distinction; exit early for the easy cases.
- if (__bits == 0) {
- if (_Fmt == chars_format::scientific) {
- if (_Last - _First < 5) {
- return { _Last, errc::value_too_large };
- }
-
- _VSTD::memcpy(_First, "0e+00", 5);
-
- return { _First + 5, errc{} };
- }
-
- // Print "0" for chars_format::fixed, chars_format::general, and chars_format{}.
- if (_First == _Last) {
- return { _Last, errc::value_too_large };
- }
-
- *_First = '0';
-
- return { _First + 1, errc{} };
- }
-
- // Decode __bits into mantissa and exponent.
- const uint32_t __ieeeMantissa = __bits & ((1u << __FLOAT_MANTISSA_BITS) - 1);
- const uint32_t __ieeeExponent = __bits >> __FLOAT_MANTISSA_BITS;
-
- // When _Fmt == chars_format::fixed and the floating-point number is a large integer,
- // it's faster to skip Ryu and immediately print the integer exactly.
- if (_Fmt == chars_format::fixed) {
- const uint32_t _Mantissa2 = __ieeeMantissa | (1u << __FLOAT_MANTISSA_BITS); // restore implicit bit
- const int32_t _Exponent2 = static_cast<int32_t>(__ieeeExponent)
- - __FLOAT_BIAS - __FLOAT_MANTISSA_BITS; // bias and normalization
-
- // Normal values are equal to _Mantissa2 * 2^_Exponent2.
- // (Subnormals are different, but they'll be rejected by the _Exponent2 test here, so they can be ignored.)
-
- if (_Exponent2 > 0) {
- return _Large_integer_to_chars(_First, _Last, _Mantissa2, _Exponent2);
- }
- }
-
- const __floating_decimal_32 __v = __f2d(__ieeeMantissa, __ieeeExponent);
- return __to_chars(_First, _Last, __v, _Fmt, __ieeeMantissa, __ieeeExponent);
-}
-
-_LIBCPP_END_NAMESPACE_STD
-
-// clang-format on