mirror of
https://github.com/vale981/arb
synced 2025-03-05 09:21:38 -05:00
32 lines
961 B
C
32 lines
961 B
C
/*
|
|
Copyright (C) 2012 Fredrik Johansson
|
|
|
|
This file is part of Arb.
|
|
|
|
Arb is free software: you can redistribute it and/or modify it under
|
|
the terms of the GNU Lesser General Public License (LGPL) as published
|
|
by the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version. See <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "fmpr.h"
|
|
|
|
void
|
|
fmpr_set_mpfr(fmpr_t x, const mpfr_t y)
|
|
{
|
|
if (!mpfr_regular_p(y))
|
|
{
|
|
if (mpfr_zero_p(y)) fmpr_zero(x);
|
|
else if (mpfr_inf_p(y) && mpfr_sgn(y) > 0) fmpr_pos_inf(x);
|
|
else if (mpfr_inf_p(y) && mpfr_sgn(y) < 0) fmpr_neg_inf(x);
|
|
else fmpr_nan(x);
|
|
}
|
|
else
|
|
{
|
|
__mpz_struct * z = _fmpz_promote(fmpr_manref(x));
|
|
fmpz_set_si(fmpr_expref(x), mpfr_get_z_2exp(z, y));
|
|
_fmpz_demote_val(fmpr_manref(x));
|
|
_fmpr_normalise(fmpr_manref(x), fmpr_expref(x), y->_mpfr_prec, FMPR_RND_DOWN);
|
|
}
|
|
}
|
|
|