mirror of
https://github.com/vale981/arb
synced 2025-03-06 09:51:39 -05:00
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/*=============================================================================
|
|
|
|
This file is part of ARB.
|
|
|
|
ARB is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
ARB is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with ARB; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
=============================================================================*/
|
|
/******************************************************************************
|
|
|
|
Copyright (C) 2013 Fredrik Johansson
|
|
|
|
******************************************************************************/
|
|
|
|
#include "acb.h"
|
|
|
|
void
|
|
acb_inv(acb_t z, const acb_t x, slong prec)
|
|
{
|
|
#define a acb_realref(x)
|
|
#define b acb_imagref(x)
|
|
#define c acb_realref(z)
|
|
#define d acb_imagref(z)
|
|
|
|
if (arb_is_zero(b))
|
|
{
|
|
arb_inv(c, a, prec);
|
|
arb_zero(d);
|
|
}
|
|
else if (arb_is_zero(a))
|
|
{
|
|
arb_inv(d, b, prec);
|
|
arb_neg(d, d);
|
|
arb_zero(c);
|
|
}
|
|
else
|
|
{
|
|
arb_t t;
|
|
arb_init(t);
|
|
|
|
arb_mul(t, a, a, prec);
|
|
arb_addmul(t, b, b, prec);
|
|
|
|
arb_div(c, a, t, prec);
|
|
arb_div(d, b, t, prec);
|
|
|
|
arb_neg(d, d);
|
|
|
|
arb_clear(t);
|
|
}
|
|
|
|
#undef a
|
|
#undef b
|
|
#undef c
|
|
#undef d
|
|
}
|
|
|