mirror of
https://github.com/vale981/arb
synced 2025-03-05 09:21:38 -05:00
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/*
|
|
Copyright (C) 2014 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 "arf.h"
|
|
|
|
int
|
|
arf_cmpabs_2exp_si(const arf_t x, slong e)
|
|
{
|
|
if (arf_is_special(x))
|
|
{
|
|
if (arf_is_zero(x)) return -1;
|
|
if (arf_is_inf(x)) return 1;
|
|
return 0;
|
|
}
|
|
|
|
/* Fast path. */
|
|
if (!COEFF_IS_MPZ(ARF_EXP(x)))
|
|
{
|
|
if (ARF_IS_POW2(x) && (ARF_EXP(x) - 1 == e))
|
|
return 0;
|
|
else
|
|
return (ARF_EXP(x) <= e) ? -1 : 1;
|
|
}
|
|
|
|
if (ARF_IS_POW2(x))
|
|
{
|
|
fmpz_t t;
|
|
fmpz_init(t);
|
|
|
|
fmpz_one(t);
|
|
fmpz_add_si(t, t, e);
|
|
|
|
if (fmpz_equal(ARF_EXPREF(x), t))
|
|
{
|
|
fmpz_clear(t);
|
|
return 0;
|
|
}
|
|
|
|
fmpz_clear(t);
|
|
}
|
|
|
|
return (fmpz_cmp_si(ARF_EXPREF(x), e) <= 0) ? -1 : 1;
|
|
}
|
|
|