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 #include <math-emu/single.h>
10
11 int
stfs(void * frS,void * ea)12 stfs(void *frS, void *ea)
13 {
14 FP_DECL_D(A);
15 FP_DECL_S(R);
16 FP_DECL_EX;
17 float f;
18
19 #ifdef DEBUG
20 printk("%s: S %p, ea %p\n", __func__, frS, ea);
21 #endif
22
23 FP_UNPACK_DP(A, frS);
24
25 #ifdef DEBUG
26 printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
27 #endif
28
29 FP_CONV(S, D, 1, 2, R, A);
30
31 #ifdef DEBUG
32 printk("R: %ld %lu %ld (%ld)\n", R_s, R_f, R_e, R_c);
33 #endif
34
35 _FP_PACK_CANONICAL(S, 1, R);
36 if (!FP_CUR_EXCEPTIONS || !__FPU_TRAP_P(FP_CUR_EXCEPTIONS)) {
37 _FP_PACK_RAW_1_P(S, &f, R);
38 if (copy_to_user(ea, &f, sizeof(float)))
39 return -EFAULT;
40 }
41
42 return FP_CUR_EXCEPTIONS;
43 }
44