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
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
/* mpf_div_ui -- Divide a float with an unsigned integer.
Copyright (C) 1993, 1994, 1996 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
The GNU MP 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include "gmp.h"
#include "gmp-impl.h"
#include "longlong.h"
void
#if __STDC__
mpf_div_ui (mpf_ptr r, mpf_srcptr u, unsigned long int v)
#else
mpf_div_ui (r, u, v)
mpf_ptr r;
mpf_srcptr u;
unsigned long int v;
#endif
{
mp_srcptr up;
mp_ptr rp, tp, rtp;
mp_size_t usize;
mp_size_t rsize, tsize;
mp_size_t sign_quotient;
mp_size_t prec;
mp_limb_t q_limb;
mp_exp_t rexp;
TMP_DECL (marker);
usize = u->_mp_size;
sign_quotient = usize;
usize = ABS (usize);
prec = r->_mp_prec;
if (v == 0)
v = 1 / v; /* divide by zero as directed */
if (usize == 0)
{
r->_mp_size = 0;
r->_mp_exp = 0;
return;
}
TMP_MARK (marker);
rp = r->_mp_d;
up = u->_mp_d;
tsize = 1 + prec;
tp = (mp_ptr) TMP_ALLOC ((tsize + 1) * BYTES_PER_MP_LIMB);
if (usize > tsize)
{
up += usize - tsize;
usize = tsize;
rtp = tp;
}
else
{
MPN_ZERO (tp, tsize - usize);
rtp = tp + (tsize - usize);
}
/* Move the dividend to the remainder. */
MPN_COPY (rtp, up, usize);
mpn_divmod_1 (rp, tp, tsize, (mp_limb_t) v);
q_limb = rp[tsize - 1];
rsize = tsize - (q_limb == 0);
rexp = u->_mp_exp - (q_limb == 0);
r->_mp_size = sign_quotient >= 0 ? rsize : -rsize;
r->_mp_exp = rexp;
TMP_FREE (marker);
}
|
