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Author SHA1 Message Date
Victor Stinner
e6905e4c82
bpo-41617: Fix pycore_bitutils.h to support clang 3.0 (GH-22042) 
__builtin_bswap16() is not available in LLVM clang 3.0.
 2020-09-01 18:25:14 +02:00
Niklas Fiekas
794e7d1ab2
bpo-29782: Consolidate _Py_Bit_Length() (GH-20739) 
In GH-2866, _Py_Bit_Length() was added to pymath.h for lack of a better
location. GH-20518 added a more appropriate header file for bit utilities. It
also shows how to properly use intrinsics. This allows reconsidering bpo-29782.

* Move the function to the new header.
* Changed return type to match __builtin_clzl() and reviewed usage.
* Use intrinsics where available.
* Pick a fallback implementation suitable for inlining.
 2020-06-15 14:33:48 +02:00
Victor Stinner
c6b292cdee
bpo-29882: Add _Py_popcount32() function (GH-20518) 
* 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().
 2020-06-08 16:30:33 +02:00
Renamed from Include/internal/pycore_byteswap.h (Browse further)