projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 1da177e4 LT |
2 | #include <linux/types.h> |
| 3 | #include <linux/errno.h> | |
| 7c0f6ba6 | 4 | #include <linux/uaccess.h> |
| 1da177e4 | 5 | |
| d2b194ed KG |
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> | |
| 1da177e4 LT |
10 | |
| 11 | int | |
| 12 | lfs(void *frD, void *ea) | |
| 13 | { | |
| 14 | FP_DECL_D(R); | |
| 15 | FP_DECL_S(A); | |
| d2b194ed | 16 | FP_DECL_EX; |
| 1da177e4 LT |
17 | float f; |
| 18 | ||
| 19 | #ifdef DEBUG | |
| e48b1b45 | 20 | printk("%s: D %p, ea %p\n", __func__, frD, ea); |
| 1da177e4 LT |
21 | #endif |
| 22 | ||
| 23 | if (copy_from_user(&f, ea, sizeof(float))) | |
| 24 | return -EFAULT; | |
| 25 | ||
| d2b194ed | 26 | FP_UNPACK_S(A, f); |
| 1da177e4 LT |
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 | ||
| d2b194ed KG |
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; | |
| 1da177e4 | 47 | } |