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 | |
10 | int |
11 | fsqrt(void *frD, void *frB) |
12 | { |
13 | FP_DECL_D(B); |
14 | FP_DECL_D(R); |
15 | FP_DECL_EX; |
16 | |
17 | #ifdef DEBUG |
18 | printk("%s: %p %p %p %p\n" , __func__, frD, frB); |
19 | #endif |
20 | |
21 | FP_UNPACK_DP(B, frB); |
22 | |
23 | #ifdef DEBUG |
24 | printk("B: %ld %lu %lu %ld (%ld)\n" , B_s, B_f1, B_f0, B_e, B_c); |
25 | #endif |
26 | |
27 | if (B_s && B_c != FP_CLS_ZERO) |
28 | FP_SET_EXCEPTION(EFLAG_VXSQRT); |
29 | if (B_c == FP_CLS_NAN) |
30 | FP_SET_EXCEPTION(EFLAG_VXSNAN); |
31 | |
32 | FP_SQRT_D(R, B); |
33 | |
34 | #ifdef DEBUG |
35 | printk("R: %ld %lu %lu %ld (%ld)\n" , R_s, R_f1, R_f0, R_e, R_c); |
36 | #endif |
37 | |
38 | __FP_PACK_D(frD, R); |
39 | |
40 | return FP_CUR_EXCEPTIONS; |
41 | } |
42 | |