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GH-129149: Add fast path for medium-sized integers in PyLong_From* functions (#131211)

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Add a fast path for medium-sized integers in `PyLong_FromInt{32,64}` and `PyLong_FromUInt{32,64}`.
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Chris Eibl 2025-03-30 10:12:42 +02:00 • committed by GitHub
parent 425f60b9eb
commit a175d64e30
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2 changed files with 16 additions and 4 deletions
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4
Misc/NEWS.d/next/Core_and_Builtins/2025-03-13-20-23-02.gh-issue-129149.z42wkm.rst Normal file
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@ -0,0 +1,4 @@
Add fast path for small and medium-size integers in
:c:func:`PyLong_FromInt32`, :c:func:`PyLong_FromUInt32`,
:c:func:`PyLong_FromInt64` and
:c:func:`PyLong_FromUInt64`. Patch by Chris Eibl.

16
Objects/longobject.c
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@ -6749,16 +6749,24 @@ PyUnstable_Long_CompactValue(const PyLongObject* op) {
PyObject* PyLong_FromInt32(int32_t value)
{ return PyLong_FromNativeBytes(&value, sizeof(value), -1); }
{
PYLONG_FROM_INT(uint32_t, int32_t, value);
}
PyObject* PyLong_FromUInt32(uint32_t value)
{ return PyLong_FromUnsignedNativeBytes(&value, sizeof(value), -1); }
{
PYLONG_FROM_UINT(uint32_t, value);
}
PyObject* PyLong_FromInt64(int64_t value)
{ return PyLong_FromNativeBytes(&value, sizeof(value), -1); }
{
PYLONG_FROM_INT(uint64_t, int64_t, value);
}
PyObject* PyLong_FromUInt64(uint64_t value)
{ return PyLong_FromUnsignedNativeBytes(&value, sizeof(value), -1); }
{
PYLONG_FROM_UINT(uint64_t, value);
}
#define LONG_TO_INT(obj, value, type_name) \
do { \