1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include <linux/types.h>
3*4882a593Smuzhiyun #include <linux/errno.h>
4*4882a593Smuzhiyun #include <linux/uaccess.h>
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <asm/sfp-machine.h>
7*4882a593Smuzhiyun #include <math-emu/soft-fp.h>
8*4882a593Smuzhiyun #include <math-emu/double.h>
9*4882a593Smuzhiyun #include <math-emu/single.h>
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun int
lfs(void * frD,void * ea)12*4882a593Smuzhiyun lfs(void *frD, void *ea)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun FP_DECL_D(R);
15*4882a593Smuzhiyun FP_DECL_S(A);
16*4882a593Smuzhiyun FP_DECL_EX;
17*4882a593Smuzhiyun float f;
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #ifdef DEBUG
20*4882a593Smuzhiyun printk("%s: D %p, ea %p\n", __func__, frD, ea);
21*4882a593Smuzhiyun #endif
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun if (copy_from_user(&f, ea, sizeof(float)))
24*4882a593Smuzhiyun return -EFAULT;
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun FP_UNPACK_S(A, f);
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun #ifdef DEBUG
29*4882a593Smuzhiyun printk("A: %ld %lu %ld (%ld) [%08lx]\n", A_s, A_f, A_e, A_c,
30*4882a593Smuzhiyun *(unsigned long *)&f);
31*4882a593Smuzhiyun #endif
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun FP_CONV(D, S, 2, 1, R, A);
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun #ifdef DEBUG
36*4882a593Smuzhiyun printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
37*4882a593Smuzhiyun #endif
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun if (R_c == FP_CLS_NAN) {
40*4882a593Smuzhiyun R_e = _FP_EXPMAX_D;
41*4882a593Smuzhiyun _FP_PACK_RAW_2_P(D, frD, R);
42*4882a593Smuzhiyun } else {
43*4882a593Smuzhiyun __FP_PACK_D(frD, R);
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun return 0;
47*4882a593Smuzhiyun }
48