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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 | } |