arch/ppc/math-emu/lfs.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 lfs(void *frD, void *ea)
  11 {
  12         FP_DECL_D(R);
  13         FP_DECL_S(A);
  14         float f;
  15
  16 #ifdef DEBUG
  17         printk("%s: D %p, ea %p\n", __FUNCTION__, frD, ea);
  18 #endif
  19
  20         if (copy_from_user(&f, ea, sizeof(float)))
  21                 return -EFAULT;
  22
  23         __FP_UNPACK_S(A, &f);
  24
  25 #ifdef DEBUG
  26         printk("A: %ld %lu %ld (%ld) [%08lx]\n", A_s, A_f, A_e, A_c,
  27                *(unsigned long *)&f);
  28 #endif
  29
  30         FP_CONV(D, S, 2, 1, R, A);
  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 __FP_PACK_D(frD, R);
  37 }