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bpo-40302: Add _Py_bswap32() function to pyport.h #19552

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Merged
vstinner merged 3 commits into from
Apr 17, 2020
Merged

bpo-40302: Add _Py_bswap32() function to pyport.h #19552

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33dba1f
bpo-40302: Add pycore_byteswap.h header file
vstinner Apr 16, 2020
2f688e9
sha256, sha512: avoid temporary variable
vstinner Apr 17, 2020
2e22746
_Py_bswap16()
vstinner Apr 17, 2020
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_Py_bswap16()
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@vstinner
vstinner committed Apr 17, 2020
commit 2e22746db0ff2d49563465613e0e748d665bef03
4 changes: 2 additions & 2 deletions Include/internal/pycore_byteswap.h
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Original file line number Diff line number Diff line change
Expand Up @@ -39,8 +39,8 @@ _Py_bswap16(uint16_t word)
return _byteswap_ushort(word);
#else
// Portable implementation which doesn't rely on circular bit shift
return ( ((word >> 8) & UINT16_C(0x00FF))
| ((word << 8) & UINT16_C(0xFF00)));
return ( ((word & UINT16_C(0x00FF)) << 8)
| ((word & UINT16_C(0xFF00)) >> 8));
#endif
}

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