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Revert "Microsoft's floating-point to_chars powered by Ryu and Ryu Printf"
This reverts commit a8025e0 since it triggers PR52584 with debug info enabled.
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‎libcxx/CREDITS.TXT

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@@ -12,9 +12,6 @@ N: Saleem Abdulrasool
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E: [email protected]
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D: Minor patches and Linux fixes.
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15-
N: Ulf Adams
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D: Invented the Ryu and Ryu Printf algorithms used in floating-point to_chars, and wrote the initial code.
17-
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N: Muiez Ahmed
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E: [email protected]
2017
D: z/OS port.
@@ -31,9 +28,6 @@ N: Holger Arnold
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E: [email protected]
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D: Minor fix.
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N: Jorg Brown
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D: Ported floating-point to_chars from MSVC to libc++.
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N: David Chisnall
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E: theraven at theravensnest dot org
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D: FreeBSD and Solaris ports, libcxxrt support, some atomics work.
@@ -87,14 +81,6 @@ N: Argyrios Kyrtzidis
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E: [email protected]
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D: Bug fixes.
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90-
N: Stephan T. Lavavej
91-
E: [email protected]
92-
E: [email protected]
93-
D: Implemented floating-point to_chars.
94-
95-
N: Microsoft Corporation
96-
D: Contributed floating-point to_chars.
97-
9884
N: Bruce Mitchener, Jr.
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E: [email protected]
10086
D: Emscripten-related changes.
@@ -166,7 +152,6 @@ D: Minor bug fix.
166152
N: Mark de Wever
167153
E: koraq at xs4all dot nl
168154
D: Format library support.
169-
D: Finalized the porting of MSVC's to_chars to libc++.
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N: Zhang Xiongpang
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E: [email protected]

‎libcxx/docs/ReleaseNotes.rst

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@@ -55,10 +55,6 @@ New Features
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behavior of standard algorithms (e.g. equal elements in ``std::sort`` or
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randomization of both sides of partition for ``std::nth_element``)
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- Floating-point support for ``std::to_chars`` support has been added.
59-
Thanks to Stephan T. Lavavej and Microsoft for providing their implemention
60-
to libc++.
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API Changes
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-----------
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‎libcxx/docs/Status/Cxx17.rst

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@@ -40,7 +40,6 @@ Paper Status
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.. note::
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.. [#note-P0067] P0067: ``std::(to|from)_chars`` for integrals has been available since version 7.0. ``std::to_chars`` for ``float`` and ``double`` since version 14.0 ``std::to_chars`` for ``long double`` uses the implementation for ``double``.
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.. [#note-P0607] P0607: The parts of P0607 that are not done are the ``<regex>`` bits.
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‎libcxx/docs/Status/Cxx17Papers.csv

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@@ -71,7 +71,7 @@
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"`P0394r4 <https://wg21.link/P0394r4>`__","LWG","Hotel Parallelifornia: terminate() for Parallel Algorithms Exception Handling","Oulu","",""
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"","","","","",""
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"`P0003R5 <https://wg21.link/P0003R5>`__","LWG","Removing Deprecated Exception Specifications from C++17","Issaquah","|Complete|","5.0"
74-
"`P0067R5 <https://wg21.link/P0067R5>`__","LWG","Elementary string conversions, revision 5","Issaquah","|Partial| [#note-P0067]",""
74+
"`P0067R5 <https://wg21.link/P0067R5>`__","LWG","Elementary string conversions, revision 5","Issaquah","|Partial|",""
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"`P0403R1 <https://wg21.link/P0403R1>`__","LWG","Literal suffixes for ``basic_string_view``\ ","Issaquah","|Complete|","4.0"
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"`P0414R2 <https://wg21.link/P0414R2>`__","LWG","Merging shared_ptr changes from Library Fundamentals to C++17","Issaquah","|Complete|","11.0"
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"`P0418R2 <https://wg21.link/P0418R2>`__","LWG","Fail or succeed: there is no atomic lattice","Issaquah","",""

‎libcxx/include/__availability

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@@ -129,10 +129,6 @@
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// This controls the availability of std::to_chars.
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# define _LIBCPP_AVAILABILITY_TO_CHARS
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// This controls the availability of floating-point std::to_chars functions.
133-
// These overloads were added later than the integer overloads.
134-
# define _LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT
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// This controls the availability of the C++20 synchronization library,
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// which requires shared library support for various operations
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// (see libcxx/src/atomic.cpp).
@@ -226,9 +222,6 @@
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# define _LIBCPP_AVAILABILITY_TO_CHARS \
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_LIBCPP_AVAILABILITY_FILESYSTEM
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229-
# define _LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT \
230-
__attribute__((unavailable))
231-
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# define _LIBCPP_AVAILABILITY_SYNC \
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__attribute__((availability(macosx,strict,introduced=11.0))) \
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__attribute__((availability(ios,strict,introduced=14.0))) \

‎libcxx/include/charconv

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@@ -598,38 +598,6 @@ from_chars(const char* __first, const char* __last, _Tp& __value, int __base)
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return __from_chars_integral(__first, __last, __value, __base);
599599
}
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601-
// Floating-point implementation starts here.
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// Unlike the other parts of charconv this is only available in C++17 and newer.
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#if _LIBCPP_STD_VER > 14
604-
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_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS
606-
to_chars_result to_chars(char* __first, char* __last, float __value);
607-
608-
_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS
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to_chars_result to_chars(char* __first, char* __last, double __value);
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_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS
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to_chars_result to_chars(char* __first, char* __last, long double __value);
613-
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_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS
615-
to_chars_result to_chars(char* __first, char* __last, float __value, chars_format __fmt);
616-
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_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS
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to_chars_result to_chars(char* __first, char* __last, double __value, chars_format __fmt);
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_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS
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to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt);
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_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS
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to_chars_result to_chars(char* __first, char* __last, float __value, chars_format __fmt, int __precision);
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_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS
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to_chars_result to_chars(char* __first, char* __last, double __value, chars_format __fmt, int __precision);
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_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS
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to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt, int __precision);
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# endif // _LIBCPP_STD_VER > 14
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#endif // _LIBCPP_CXX03_LANG
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_LIBCPP_END_NAMESPACE_STD

‎libcxx/lib/abi/CHANGELOG.TXT

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@@ -16,48 +16,6 @@ New entries should be added directly below the "Version" header.
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Version 14.0
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------------
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* [libc++] `to_chars` for floating point.
20-
21-
This commit added the `to_chars` implementation for floating point values.
22-
The entire implementation resides in the dylib and the functions specified
23-
in the Standard are now part of the ABI.
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arm64-apple-darwin
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------------------
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Symbol added: _ZNSt3__18to_charsEPcS0_d
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Symbol added: _ZNSt3__18to_charsEPcS0_dNS_12chars_formatE
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Symbol added: _ZNSt3__18to_charsEPcS0_dNS_12chars_formatEi
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Symbol added: _ZNSt3__18to_charsEPcS0_e
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Symbol added: _ZNSt3__18to_charsEPcS0_eNS_12chars_formatE
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Symbol added: _ZNSt3__18to_charsEPcS0_eNS_12chars_formatEi
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Symbol added: _ZNSt3__18to_charsEPcS0_f
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Symbol added: _ZNSt3__18to_charsEPcS0_fNS_12chars_formatE
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Symbol added: _ZNSt3__18to_charsEPcS0_fNS_12chars_formatEi
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x86_64-apple-darwin
38-
-------------------
39-
Symbol added: _ZNSt3__18to_charsEPcS0_d
40-
Symbol added: _ZNSt3__18to_charsEPcS0_dNS_12chars_formatE
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Symbol added: _ZNSt3__18to_charsEPcS0_dNS_12chars_formatEi
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Symbol added: _ZNSt3__18to_charsEPcS0_e
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Symbol added: _ZNSt3__18to_charsEPcS0_eNS_12chars_formatE
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Symbol added: _ZNSt3__18to_charsEPcS0_eNS_12chars_formatEi
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Symbol added: _ZNSt3__18to_charsEPcS0_f
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Symbol added: _ZNSt3__18to_charsEPcS0_fNS_12chars_formatE
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Symbol added: _ZNSt3__18to_charsEPcS0_fNS_12chars_formatEi
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49-
x86_64-unknown-linux-gnu
50-
------------------------
51-
Symbol added: _ZNSt3__18to_charsEPcS0_d
52-
Symbol added: _ZNSt3__18to_charsEPcS0_dNS_12chars_formatE
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Symbol added: _ZNSt3__18to_charsEPcS0_dNS_12chars_formatEi
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Symbol added: _ZNSt3__18to_charsEPcS0_e
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Symbol added: _ZNSt3__18to_charsEPcS0_eNS_12chars_formatE
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Symbol added: _ZNSt3__18to_charsEPcS0_eNS_12chars_formatEi
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Symbol added: _ZNSt3__18to_charsEPcS0_f
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Symbol added: _ZNSt3__18to_charsEPcS0_fNS_12chars_formatE
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Symbol added: _ZNSt3__18to_charsEPcS0_fNS_12chars_formatEi
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6119
* [libc++] Resolve missing table_size symbol
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This commit added an out-of-line definition for `table_size` in the library.

‎libcxx/lib/abi/arm64-apple-darwin.libcxxabi.v1.stable.exceptions.no_new_in_libcxx.abilist

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@@ -1879,15 +1879,6 @@
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{'is_defined': True, 'name': '__ZNSt3__18time_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE2idE', 'size': 0, 'type': 'OBJECT'}
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{'is_defined': True, 'name': '__ZNSt3__18time_putIcNS_19ostreambuf_iteratorIcNS_11char_traitsIcEEEEE2idE', 'size': 0, 'type': 'OBJECT'}
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{'is_defined': True, 'name': '__ZNSt3__18time_putIwNS_19ostreambuf_iteratorIwNS_11char_traitsIwEEEEE2idE', 'size': 0, 'type': 'OBJECT'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_d', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_dNS_12chars_formatE', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_dNS_12chars_formatEi', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_e', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_eNS_12chars_formatE', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_eNS_12chars_formatEi', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_f', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_fNS_12chars_formatE', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_fNS_12chars_formatEi', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18valarrayImE6resizeEmm', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18valarrayImEC1Em', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18valarrayImEC2Em', 'type': 'FUNC'}

‎libcxx/lib/abi/x86_64-apple-darwin.libcxxabi.v1.stable.exceptions.no_new_in_libcxx.abilist

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@@ -1879,15 +1879,6 @@
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{'is_defined': True, 'name': '__ZNSt3__18time_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE2idE', 'size': 0, 'type': 'OBJECT'}
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{'is_defined': True, 'name': '__ZNSt3__18time_putIcNS_19ostreambuf_iteratorIcNS_11char_traitsIcEEEEE2idE', 'size': 0, 'type': 'OBJECT'}
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{'is_defined': True, 'name': '__ZNSt3__18time_putIwNS_19ostreambuf_iteratorIwNS_11char_traitsIwEEEEE2idE', 'size': 0, 'type': 'OBJECT'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_d', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_dNS_12chars_formatE', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_dNS_12chars_formatEi', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_e', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_eNS_12chars_formatE', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_eNS_12chars_formatEi', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_f', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_fNS_12chars_formatE', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18to_charsEPcS0_fNS_12chars_formatEi', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18valarrayImE6resizeEmm', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18valarrayImEC1Em', 'type': 'FUNC'}
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{'is_defined': True, 'name': '__ZNSt3__18valarrayImEC2Em', 'type': 'FUNC'}

‎libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.exceptions.no_new_in_libcxx.abilist

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@@ -1573,15 +1573,6 @@
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{'is_defined': True, 'name': '_ZNSt3__18time_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE2idE', 'size': 16, 'type': 'OBJECT'}
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{'is_defined': True, 'name': '_ZNSt3__18time_putIcNS_19ostreambuf_iteratorIcNS_11char_traitsIcEEEEE2idE', 'size': 16, 'type': 'OBJECT'}
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{'is_defined': True, 'name': '_ZNSt3__18time_putIwNS_19ostreambuf_iteratorIwNS_11char_traitsIwEEEEE2idE', 'size': 16, 'type': 'OBJECT'}
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{'is_defined': True, 'name': '_ZNSt3__18to_charsEPcS0_d', 'type': 'FUNC'}
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{'is_defined': True, 'name': '_ZNSt3__18to_charsEPcS0_dNS_12chars_formatE', 'type': 'FUNC'}
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{'is_defined': True, 'name': '_ZNSt3__18to_charsEPcS0_dNS_12chars_formatEi', 'type': 'FUNC'}
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{'is_defined': True, 'name': '_ZNSt3__18to_charsEPcS0_e', 'type': 'FUNC'}
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{'is_defined': True, 'name': '_ZNSt3__18to_charsEPcS0_eNS_12chars_formatE', 'type': 'FUNC'}
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{'is_defined': True, 'name': '_ZNSt3__18to_charsEPcS0_eNS_12chars_formatEi', 'type': 'FUNC'}
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{'is_defined': True, 'name': '_ZNSt3__18to_charsEPcS0_f', 'type': 'FUNC'}
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{'is_defined': True, 'name': '_ZNSt3__18to_charsEPcS0_fNS_12chars_formatE', 'type': 'FUNC'}
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{'is_defined': True, 'name': '_ZNSt3__18to_charsEPcS0_fNS_12chars_formatEi', 'type': 'FUNC'}
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{'is_defined': True, 'name': '_ZNSt3__18valarrayImE6resizeEmm', 'type': 'FUNC'}
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{'is_defined': True, 'name': '_ZNSt3__18valarrayImEC1Em', 'type': 'FUNC'}
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{'is_defined': True, 'name': '_ZNSt3__18valarrayImEC2Em', 'type': 'FUNC'}

‎libcxx/src/CMakeLists.txt

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@@ -19,26 +19,13 @@ set(LIBCXX_SOURCES
1919
include/atomic_support.h
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include/config_elast.h
2121
include/refstring.h
22-
include/ryu/common.h
23-
include/ryu/d2fixed.h
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include/ryu/d2fixed_full_table.h
25-
include/ryu/d2s.h
26-
include/ryu/d2s_full_table.h
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include/ryu/d2s_intrinsics.h
28-
include/ryu/digit_table.h
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include/ryu/f2s.h
30-
include/ryu/ryu.h
31-
include/to_chars_floating_point.h
3222
legacy_pointer_safety.cpp
3323
memory.cpp
3424
mutex.cpp
3525
mutex_destructor.cpp
3626
new.cpp
3727
optional.cpp
3828
random_shuffle.cpp
39-
ryu/d2fixed.cpp
40-
ryu/d2s.cpp
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ryu/f2s.cpp
4229
shared_mutex.cpp
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stdexcept.cpp
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string.cpp

‎libcxx/src/charconv.cpp

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@@ -9,14 +9,27 @@
99
#include "charconv"
1010
#include <string.h>
1111

12-
#include "include/ryu/digit_table.h"
13-
#include "include/to_chars_floating_point.h"
14-
1512
_LIBCPP_BEGIN_NAMESPACE_STD
1613

1714
namespace __itoa
1815
{
1916

17+
static constexpr char cDigitsLut[200] = {
18+
'0', '0', '0', '1', '0', '2', '0', '3', '0', '4', '0', '5', '0', '6', '0',
19+
'7', '0', '8', '0', '9', '1', '0', '1', '1', '1', '2', '1', '3', '1', '4',
20+
'1', '5', '1', '6', '1', '7', '1', '8', '1', '9', '2', '0', '2', '1', '2',
21+
'2', '2', '3', '2', '4', '2', '5', '2', '6', '2', '7', '2', '8', '2', '9',
22+
'3', '0', '3', '1', '3', '2', '3', '3', '3', '4', '3', '5', '3', '6', '3',
23+
'7', '3', '8', '3', '9', '4', '0', '4', '1', '4', '2', '4', '3', '4', '4',
24+
'4', '5', '4', '6', '4', '7', '4', '8', '4', '9', '5', '0', '5', '1', '5',
25+
'2', '5', '3', '5', '4', '5', '5', '5', '6', '5', '7', '5', '8', '5', '9',
26+
'6', '0', '6', '1', '6', '2', '6', '3', '6', '4', '6', '5', '6', '6', '6',
27+
'7', '6', '8', '6', '9', '7', '0', '7', '1', '7', '2', '7', '3', '7', '4',
28+
'7', '5', '7', '6', '7', '7', '7', '8', '7', '9', '8', '0', '8', '1', '8',
29+
'2', '8', '3', '8', '4', '8', '5', '8', '6', '8', '7', '8', '8', '8', '9',
30+
'9', '0', '9', '1', '9', '2', '9', '3', '9', '4', '9', '5', '9', '6', '9',
31+
'7', '9', '8', '9', '9'};
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template <typename T>
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inline _LIBCPP_INLINE_VISIBILITY char*
2235
append1(char* buffer, T i) noexcept
@@ -29,7 +42,7 @@ template <typename T>
2942
inline _LIBCPP_INLINE_VISIBILITY char*
3043
append2(char* buffer, T i) noexcept
3144
{
32-
memcpy(buffer, &__DIGIT_TABLE[(i)*2], 2);
45+
memcpy(buffer, &cDigitsLut[(i)*2], 2);
3346
return buffer + 2;
3447
}
3548

@@ -144,53 +157,4 @@ __u64toa(uint64_t value, char* buffer) noexcept
144157

145158
} // namespace __itoa
146159

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// The original version of floating-point to_chars was written by Microsoft and
148-
// contributed with the following license.
149-
150-
// Copyright (c) Microsoft Corporation.
151-
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
152-
153-
// This implementation is dedicated to the memory of Mary and Thavatchai.
154-
155-
to_chars_result to_chars(char* __first, char* __last, float __value) {
156-
return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(__first, __last, __value, chars_format{}, 0);
157-
}
158-
159-
to_chars_result to_chars(char* __first, char* __last, double __value) {
160-
return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(__first, __last, __value, chars_format{}, 0);
161-
}
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to_chars_result to_chars(char* __first, char* __last, long double __value) {
164-
return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(__first, __last, static_cast<double>(__value),
165-
chars_format{}, 0);
166-
}
167-
168-
to_chars_result to_chars(char* __first, char* __last, float __value, chars_format __fmt) {
169-
return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(__first, __last, __value, __fmt, 0);
170-
}
171-
172-
to_chars_result to_chars(char* __first, char* __last, double __value, chars_format __fmt) {
173-
return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(__first, __last, __value, __fmt, 0);
174-
}
175-
176-
to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt) {
177-
return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(__first, __last, static_cast<double>(__value),
178-
__fmt, 0);
179-
}
180-
181-
to_chars_result to_chars(char* __first, char* __last, float __value, chars_format __fmt, int __precision) {
182-
return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>(__first, __last, __value, __fmt,
183-
__precision);
184-
}
185-
186-
to_chars_result to_chars(char* __first, char* __last, double __value, chars_format __fmt, int __precision) {
187-
return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>(__first, __last, __value, __fmt,
188-
__precision);
189-
}
190-
191-
to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt, int __precision) {
192-
return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>(
193-
__first, __last, static_cast<double>(__value), __fmt, __precision);
194-
}
195-
196160
_LIBCPP_END_NAMESPACE_STD

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