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
|
#include <linux/types.h>
#include <linux/errno.h>
#include <asm/uaccess.h>
#include <asm/sfp-machine.h>
#include <math-emu/soft-fp.h>
#include <math-emu/double.h>
#include <math-emu/single.h>
int
lfs(void *frD, void *ea)
{
FP_DECL_D(R);
FP_DECL_S(A);
FP_DECL_EX;
float f;
#ifdef DEBUG
printk("%s: D %p, ea %p\n", __func__, frD, ea);
#endif
if (copy_from_user(&f, ea, sizeof(float)))
return -EFAULT;
FP_UNPACK_S(A, f);
#ifdef DEBUG
printk("A: %ld %lu %ld (%ld) [%08lx]\n", A_s, A_f, A_e, A_c,
*(unsigned long *)&f);
#endif
FP_CONV(D, S, 2, 1, R, A);
#ifdef DEBUG
printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
#endif
if (R_c == FP_CLS_NAN) {
R_e = _FP_EXPMAX_D;
_FP_PACK_RAW_2_P(D, frD, R);
} else {
__FP_PACK_D(frD, R);
}
return 0;
}
|
