LXR linux/arch/powerpc/math-emu/stfs.c

   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
  10int
  11stfs(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);
  35        if (!FP_CUR_EXCEPTIONS || !__FPU_TRAP_P(FP_CUR_EXCEPTIONS)) {
  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}
  43