arch/powerpc/math-emu/stfs.c

   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 #include "single.h"
   8
   9 int
  10 stfs(void *frS, void *ea)
  11 {
  12         FP_DECL_D(A);
  13         FP_DECL_S(R);
  14         float f;
  15         int err;
  16
  17 #ifdef DEBUG
  18         printk("%s: S %p, ea %p\n", __FUNCTION__, frS, ea);
  19 #endif
  20
  21         __FP_UNPACK_D(A, frS);
  22
  23 #ifdef DEBUG
  24         printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
  25 #endif
  26
  27         FP_CONV(S, D, 1, 2, R, A);
  28
  29 #ifdef DEBUG
  30         printk("R: %ld %lu %ld (%ld)\n", R_s, R_f, R_e, R_c);
  31 #endif
  32
  33         err = _FP_PACK_CANONICAL(S, 1, R);
  34         if (!err || !__FPU_TRAP_P(err)) {
  35                 __FP_PACK_RAW_1(S, &f, R);
  36                 if (copy_to_user(ea, &f, sizeof(float)))
  37                         return -EFAULT;
  38         }
  39
  40         return err;
  41 }