tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#include <linux/types.h>
2#include <linux/errno.h>
3#include <asm/uaccess.h>
4
5#include <asm/sfp-machine.h>
6#include <math-emu/soft-fp.h>
7#include <math-emu/double.h>
8
9int
10fsqrt(void *frD, void *frB)
11{
12 FP_DECL_D(B);
13 FP_DECL_D(R);
14 FP_DECL_EX;
15
16#ifdef DEBUG
17 printk("%s: %p %p %p %p\n", __func__, frD, frB);
18#endif
19
20 FP_UNPACK_DP(B, frB);
21
22#ifdef DEBUG
23 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
24#endif
25
26 if (B_s && B_c != FP_CLS_ZERO)
27 FP_SET_EXCEPTION(EFLAG_VXSQRT);
28 if (B_c == FP_CLS_NAN)
29 FP_SET_EXCEPTION(EFLAG_VXSNAN);
30
31 FP_SQRT_D(R, B);
32
33#ifdef DEBUG
34 printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
35#endif
36
37 __FP_PACK_D(frD, R);
38
39 return FP_CUR_EXCEPTIONS;
40}