aboutsummaryrefslogtreecommitdiffstats
path: root/arch/ppc/math-emu/lfs.c
blob: c86dee3d76552d66ca2ab2abd385eeda7b9d4e13 (plain) (blame)
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
#include <linux/types.h>
#include <linux/errno.h>
#include <asm/uaccess.h>

#include "soft-fp.h"
#include "double.h"
#include "single.h"

int
lfs(void *frD, void *ea)
{
	FP_DECL_D(R);
	FP_DECL_S(A);
	float f;

#ifdef DEBUG
	printk("%s: D %p, ea %p\n", __FUNCTION__, 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

	return __FP_PACK_D(frD, R);
}