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Directly initialize fmpz from a python int. #64

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Directly initialize fmpz from a python int. #64

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Commits on Aug 20, 2023

  1. Directly initialize fmpz from a python int. 

    Mimics the code from gmpy2 and so depends on undocumented internals of
PyLong.
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Commits on Aug 21, 2023

  1. Changed fmpz_set_pylong to use _fmpz_promote and demote 

    No longer allocating a separate fmpz object so should be faster.
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  2. change fmpz_get_intlong to use mpz_export 

    This uses the method from sagemath which is a bit simpler than that of
gmpy2.  It is missing a normalization step that is in gmpy2.  I guess
that the normalization step is not necessary.
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  3. Merge branch 'master' into initialize_fmpz

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Commits on Aug 24, 2023

  1. Sped up fmpz_set_pylong in the 2**30 to 2**40 range 

    I'm not entirely sure what is going on, but this seems to be the fastest
set of methods
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Commits on Sep 23, 2023

  1. Merge branch 'master' into initialize_fmpz 

    Not the most straightforward of merges, light editing of flintlib/flint.pxd and
flintlib/fmpz.pxd was needed.
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