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
|
#include <stdio.h>
#include "gmp.h"
#include "gmp-impl.h"
#include "longlong.h"
#include "mpfr.h"
void
#if __STDC__
mpfr_set_si(mpfr_ptr x, long i, unsigned char rnd_mode)
#else
mpfr_set_si(x, i, rnd_mode)
mpfr_ptr x;
long i;
unsigned char rnd_mode;
#endif
{
unsigned long xn, cnt; mp_limb_t ai;
if (i==0) { SET_ZERO(x); return; }
xn = (PREC(x)-1)/BITS_PER_MP_LIMB;
ai = ABS(i);
count_leading_zeros(cnt, ai);
x -> _mp_d[xn] = ai << cnt;
/* don't forget to put zero in lower limbs */
MPN_ZERO(MANT(x), xn);
x -> _mp_exp = BITS_PER_MP_LIMB - cnt;
/* warning: don't change the precision of x! */
if (i*SIGN(x) < 0) CHANGE_SIGN(x);
return;
}
void
#if __STDC__
mpfr_set_ui(mpfr_ptr x, unsigned long i, unsigned char rnd_mode)
#else
mpfr_set_ui(x, i, rnd_mode)
mpfr_ptr x;
long i;
unsigned char rnd_mode;
#endif
{
unsigned int xn, cnt;
if (i==0) { SET_ZERO(x); return; }
xn = (PREC(x)-1)/BITS_PER_MP_LIMB;
count_leading_zeros(cnt, (mp_limb_t) i);
x -> _mp_d[xn] = ((mp_limb_t) i) << cnt;
/* don't forget to put zero in lower limbs */
MPN_ZERO(MANT(x), xn);
x -> _mp_exp = BITS_PER_MP_LIMB - cnt;
/* warning: don't change the precision of x! */
if (SIGN(x) < 0) CHANGE_SIGN(x);
return;
}
|
