1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/* mpfr_swap (U, V) -- Swap U and V.
Copyright 2000-2004, 2006-2019 Free Software Foundation, Inc.
Contributed by the AriC and Caramba projects, INRIA.
This file is part of the GNU MPFR Library.
The GNU MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The GNU MPFR Library 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
#include "mpfr-impl.h"
/* Using memcpy is a few slower than swapping by hand. */
void
mpfr_swap (mpfr_ptr u, mpfr_ptr v)
{
mpfr_prec_t p1, p2;
mpfr_sign_t s1, s2;
mpfr_exp_t e1, e2;
mp_limb_t *m1, *m2;
p1 = MPFR_PREC(u);
p2 = MPFR_PREC(v);
MPFR_PREC(v) = p1;
MPFR_PREC(u) = p2;
s1 = MPFR_SIGN(u);
s2 = MPFR_SIGN(v);
MPFR_SIGN(v) = s1;
MPFR_SIGN(u) = s2;
e1 = MPFR_EXP(u);
e2 = MPFR_EXP(v);
MPFR_EXP(v) = e1;
MPFR_EXP(u) = e2;
m1 = MPFR_MANT(u);
m2 = MPFR_MANT(v);
MPFR_MANT(v) = m1;
MPFR_MANT(u) = m2;
}
|
