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 "soft-fp.h"
6#include "double.h"
7
8int
9fsqrt(void *frD, void *frB)
10{
11 FP_DECL_D(B);
12 FP_DECL_D(R);
13 int ret = 0;
14
15#ifdef DEBUG
16 printk("%s: %p %p %p %p\n", __FUNCTION__, frD, frB);
17#endif
18
19 __FP_UNPACK_D(B, frB);
20
21#ifdef DEBUG
22 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
23#endif
24
25 if (B_s && B_c != FP_CLS_ZERO)
26 ret |= EFLAG_VXSQRT;
27 if (B_c == FP_CLS_NAN)
28 ret |= EFLAG_VXSNAN;
29
30 FP_SQRT_D(R, B);
31
32#ifdef DEBUG
33 printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
34#endif
35
36 return (ret | __FP_PACK_D(frD, R));
37}