Linux Kernel  3.7.1
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stfs.c
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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 #include <math-emu/single.h>
9 
10 int
11 stfs(void *frS, void *ea)
12 {
13  FP_DECL_D(A);
14  FP_DECL_S(R);
15  FP_DECL_EX;
16  float f;
17 
18 #ifdef DEBUG
19  printk("%s: S %p, ea %p\n", __func__, frS, ea);
20 #endif
21 
22  FP_UNPACK_DP(A, frS);
23 
24 #ifdef DEBUG
25  printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
26 #endif
27 
28  FP_CONV(S, D, 1, 2, R, A);
29 
30 #ifdef DEBUG
31  printk("R: %ld %lu %ld (%ld)\n", R_s, R_f, R_e, R_c);
32 #endif
33 
34  _FP_PACK_CANONICAL(S, 1, R);
36  _FP_PACK_RAW_1_P(S, &f, R);
37  if (copy_to_user(ea, &f, sizeof(float)))
38  return -EFAULT;
39  }
40 
41  return FP_CUR_EXCEPTIONS;
42 }