1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/types.h>
3 #include <linux/errno.h>
4 #include <linux/uaccess.h>
5
6 #include <asm/sfp-machine.h>
7 #include <math-emu/soft-fp.h>
8 #include <math-emu/double.h>
9 #include <math-emu/single.h>
10
11 int
12 lfs(void *frD, void *ea)
13 {
14 FP_DECL_D(R);
15 FP_DECL_S(A);
16 FP_DECL_EX;
17 float f;
18
19 #ifdef DEBUG
20 printk("%s: D %p, ea %p\n", __func__, frD, ea);
21 #endif
22
23 if (copy_from_user(&f, ea, sizeof(float)))
24 return -EFAULT;
25
26 FP_UNPACK_S(A, f);
27
28 #ifdef DEBUG
29 printk("A: %ld %lu %ld (%ld) [%08lx]\n", A_s, A_f, A_e, A_c,
30 *(unsigned long *)&f);
31 #endif
32
33 FP_CONV(D, S, 2, 1, R, A);
34
35 #ifdef DEBUG
36 printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
37 #endif
38
39 if (R_c == FP_CLS_NAN) {
40 R_e = _FP_EXPMAX_D;
41 _FP_PACK_RAW_2_P(D, frD, R);
42 } else {
43 __FP_PACK_D(frD, R);
44 }
45
46 return 0;
47 }
48
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