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bpo-29882: Add _Py_popcount32() function (GH-20518)

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* Rename pycore_byteswap.h to pycore_bitutils.h.
* Move popcount_digit() to pycore_bitutils.h as _Py_popcount32().
* _Py_popcount32() uses GCC and clang builtin function if available.
* Add unit tests to _Py_popcount32().
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Victor Stinner 2020-06-08 16:30:33 +02:00 • committed by GitHub
parent 301f0d4ff9
commit c6b292cdee
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11 changed files with 108 additions and 39 deletions
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PCbuild/pythoncore.vcxproj
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@ -170,7 +170,7 @@
<ClInclude Include="..\Include\internal\pycore_accu.h" />
<ClInclude Include="..\Include\internal\pycore_atomic.h" />
<ClInclude Include="..\Include\internal\pycore_bytes_methods.h" />
<ClInclude Include="..\Include\internal\pycore_byteswap.h" />
<ClInclude Include="..\Include\internal\pycore_bitutils.h" />
<ClInclude Include="..\Include\internal\pycore_call.h" />
<ClInclude Include="..\Include\internal\pycore_ceval.h" />
<ClInclude Include="..\Include\internal\pycore_code.h" />