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
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